What are the similarities and differences between static stretching and dynamic stretching?

Answers

Answer 1

The similarities and differences between static stretching and dynamic stretching are the dynamic stretch is a style of stretching that is more strenuous and physically stimulating, while the static stretch is a form of stretching that is slower and more relaxing.

Another difference between static and dynamic stretching is that after a dynamic stretch, you may feel stronger and have more muscle endurance and speed, whereas static stretching before an exercise diminishes these same qualities; To get the most out of your workout, perform dynamic stretching before you begin, and static stretching afterward. Static and dynamic stretching have similar benefits in lowering the risk of injury by increasing flexibility, balance, and body awareness.

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Related Questions

Blocks A and B of masses M and 3M, respectively, are on a horizontal surface of negligible friction. A horizontal force FA is exerted on block A, as shown. If the force exerted by block B on block A has a magnitude F, the magnitude of FA is
a. 1/4 F
b. 3/4 F
c. F
d. 4/3 F
e. 4F

Answers

If there is no friction and block B pushes block A with a force of magnitude F, therefore FA will also have a magnitude F, according to Newton's third law of motion.

Newton's Third Law.

According to Newton's third law, each force (action) in nature has an opposite and equal response. Whenever object B pulls on object A, item A pulls back on item B with an equal and opposing force.

Given :

Mass of Block A = M

Mass of Block B = 3M

Force exerted on block A is FA

Because both boxes are in contact.

Hence, force exerted by block A on block B is same that is FA

Force exerted by block B on block A has magnitude F (Given)

From Newton's third law of motion, the magnitude of FA is F Newton.

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Is torque R * F or F * R?

Answers

Answer:

R*F

Explanation:

A 5mL tank of Carbon dioxide i tored at a preure of 30mmHg. It i moved to an altitude with a preure of 28mmHg. What will the new volume of Carbon dioxide be?

Answers

The new volume of Carbon dioxide be 5.36 mL.

What happened to the amount of gas in the syringe as you raised the plunger?

Boyle's Law can also be used to explain how a syringe operates. A syringe's plunger being drawn out causes the volume inside the barrel to expand, which lowers the pressure inside the barrel.

Describe Boyle's Law.

According to Boyle's Law, P1V1=P2V2 while the temperature is constant. In accordance with Boyle's Law, pressure and volume are inversely linked. In other words, volume decreases as pressure rises (and vice versa).

Given:

Volume (V1) =5ml

Pressure (P1) = 30 mmHg

Pressure (P2) =28 mmHg

Volume (V2) = ?

From Boyle's Law,

[tex]P_1V_1=P_2V_2[/tex]

[tex]30*5=28*V_2[/tex]

[tex]V_2=\frac{30*5}{28}[/tex]

[tex]V_2= 5.36 ml[/tex]

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What is Dynamics flexibility?

Answers

The capacity to move joints and muscles throughout their complete range of motion while engaging in active activity is known as dynamic flexibility.

What is meant by dynamic flexibility?

The absolute range of motion that a person can acquire through movement is referred to as dynamic flexibility. In other words, the greatest range of motion is the maximum distance that may be reached, bent, or turned. The terms "dynamic flexibility" and "ballistic flexibility" are interchangeable.

Static stretches are those in which you remain in a single position—standing, sitting, or lying still—for up to 45 seconds. Dynamic stretches are regulated motions that get your ligaments, muscles, and other soft tissues ready for action and safety.

Before a workout or any sort of exercise, dynamic stretching is an excellent approach to improve flexibility and engage key muscles.

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The driver of a car traveling at 30.2 m/s applies the brakes and undergoes a constant deceleration of 1.4 m/s 2 . How many revolutions does each tire make before the car comes to a stop, assuming that the car does not skid and that the tires have radii of 0.37 m

Answers

The driver of a car traveling at 30.2 m/s applies the brakes and undergoes a constant deceleration of 1.4 m/s 2 . The car makes 139 revolutions.

A change in velocity that does not alter over time is referred to as a constant acceleration. A car's average acceleration stays constant at 20 mph per minute even if it increases its speed by 20 mph in one minute and another 20 mph the next.

Acceleration in the direction crosswise to the direction of the velocity is always referred to as deceleration. Deceleration always slows down motion. However, negative acceleration is just acceleration in the opposite direction according to the selected coordinate system.

Given:

v₀ = 30 m/s

v = 0 m/s

a = -1.4 m/s²

Find: Δx

v² = v₀² + 2aΔx

(0 m/s)

² = (30 m/s)

² + 2 (-1.4 m/s²) Δx

Δx = 321.43 m

The tires' circumference is 2 m plus 0.37 m, or 2.32 m. Therefore:

139 rev = 321.43 m (1 rev / 2.32 m)

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Describe the properties of waves and explain how they can be measured.
Why is a sound wave considered a mechanical wave?

Answers

The properties of waves are: wavelength, time period.

Sound wave is considered a mechanical wave because it requires medium to travel.

What is mechanical wave?

A mechanical wave is one whose energy cannot be transmitted via a vacuum. To transfer their energy from one place to another, mechanical waves need a medium.

A mechanical wave is something like a sound wave. A vacuum can not be traversed by sound waves.

Units of time and space can be used to measure the fundamental characteristics of waves. The length between wave crests, or wavelength (L), and the time it takes a wave to pass a fixed point, or period (T), are two characteristics that can be measured directly.

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The earth completes a circular orbit around the sun in one year. The orbit has a radius of 93,000,000 miles. What is the speed of the earth around the sun in m/s?
Report your result using scientific notation and the correct significant figures.
—x10–m/s

Answers

In a year, the earth revolves around the sun once in a circular motion. Therefore, the earth will orbit the sun at a 2.95 m/s speed.

Planets in our solar system did not appear out of thin air. Neither did the sun. They were all a part of a large cloud of gas and dust. Gravity accumulated a lot of material in the center to form the sun. As it spun around the forming sun, the extra matter clashed and gathered together. Some would be capable of attracting more gas and dust, eventually forming planets, because to their powerful gravitational forces.

The answer to the query is

v = 2πR / T

2R equals 6.28 * 9.3 * 107 miles.

T = 24 * 3600 * 365 = 3.15 × 10⁷ sec

v = 9.3 / 3.15 = 2.95 m/s.

Hence, the earth's speed of the earth around the sun will be 2.95 m/s.

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What are the main mechanisms that affect the gene pool?

Answers

Answer: Natural selection, Genetic drift , Mutations and Gene flow

Explanation:  

Trends are easier to detect when the signal-to-noise ratio is low.
a True
b False

Answers

Answer:

I think it's b. False

Explanation:

What is the difference between dynamic and active stretching?

Answers

Stretching that is passive, such as static stretching, is contrasted with active stretching, such as dynamic stretching. It entails motion, putting the muscles and joints through their full range of motion.

Are dynamic active stretches the same?

Active stretching – what is it? Active stretching is the process of relaxing and stretching opposing muscles without the use of external pressures, as opposed to dynamic stretching or ballistic stretching. Stretching that is active is not passive.

What are a few instances of stretching actively?

In general, an active stretch doesn't require the use of an external force. An illustration would be a side-leaning stretch with the arms overhead. It is not necessary to pull, push, hold, brace, or hold the stretch. Active stretching is a common practice in yoga, as you'll discover.

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Your twin sister (who has the same weight as you) and you decided to go up to a very tall building. You take the elevator straight up. Your twin sister decide to walk up the spiral stairway. Compare the gravitational potential energy of you and your sister, after you both reach the top. assuming that you and your friend have equal masses.

Answers

Both of you have the same amount of potential energy since your masses are the same.

Define potential energy?

In physics, potential energy is the power that a substance retains as a result of its position in respect to other things, internal pressures, electric charge, or other substances. Potential energy is a type of stored energy that depends on the interactions of various system elements.

The potential energy of a spring rises when it is crushed or stretched. The potential energy of a steel ball increases if it is raised above the ground as opposed to falling to it. Potential energy is the name for the energy that exists in everything that is raised from rest and can be released at a later time.

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1 pts What is the work required to raise a 25.0 kg object from the surface of the Earth to a height of 3.33 m

Answers

The work required to raise a 25.0 kg object from the surface of the earth to a height of 3.33 m

Formula: F = 25.0, D = 3.33, and W =?

W = F x D

Putting values together equals 25.0 x 3.33 W = 83.25 j.

Work = force times distance, or W = Fd.

F = W/d for force

Distance: W/F = d

W = work, F = force, and D = distance.

The integral of such a force applied over a displacement distance is referred to as "work." When one engages in work, they are doing something that requires them to use their strength or force.

When energy is transferred to an item, it is considered to have undergone work in science.

The integral of such a force applied over a displacement distance is referred to as work. When one engages in work, they are doing something that requires them to use their strength or force.

When energy is transferred to an item, it is considered to have undergone work in science.

The physics formula for work

The physics equation or formula is:

W = Fd

Work (force times distance)

For force, F = W/d.

Distance: W/F = d

The scalar dot product of force and displacement also yields work.

FDCos = W

Work-related SI unit :

Joule is the SI unit of work (J). The work performed by a force of one newton operating over a distance of one meter is defined as one joule in this context. kgm2s-2 is the SI base unit of work.

Work can be defined as the quantity of energy that a force transfers. Calculate work Another name for physics is the joule calculator. Work is represented by the letter "W."

Work is defined as a motion that is caused by a resisting force and is quantified by the force's product into the motion component that is resolved in the force's direction. The size of it is ML2T-2.

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a force applied to a 3kg mass over a distance of 7.5m, increase the velocity of the mass from 5m/s. calculate the magnitude of the force assume the force and the displacement of the mass are parallel​

Answers

The magnitude of the force assuming the force and the displacement of the mass is parallel​ is 10 N.

What is force?

An agent with the ability to change a body's resting or moving condition is known as an external force. It has a magnitude and a direction. The place where force is applied is called the application, and the direction in which it is applied is called the direction of the force.

The Force can be computed using a spring balance. The SI unit of force is Newton (N).

What is the displacement with an example in physics?

Displacement is the change in the location of an object independent of the direction it is traveling. Displacement is a vector quantity since it takes into consideration both the magnitude and the direction of an object's motion. As a vector quantity, displacement can have a positive, negative, or zero value.

Given:

m = 3kg

distance = 7.5m

Velocity = 5m/s

Now, we can calculate the time

Velocity = displacement/time

Time t = 7.5/5

Time t = 1.5s

F = ma

[tex]F = 3*\frac{v}{t}[/tex]

[tex]F = 3*\frac{5}{1.5}[/tex]

F = 3×3.33

F = 9.99

F = 10N

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Which statement describes the electrostatic force between two charged objects?
A It is greater when two objects are farther apart.
B It is greater if two objects have the same charge.
C It is greater when the charges of the objects are greater.
D It is zero if the charges of the objects repel one another.

Answers

The electrostatic force connecting two electrostatic force is expressed by the statement that it is stronger when the voltages of the items are greater.

Electrostatics: What is it?

The study of energies between charged, as outlined by Coulomb's Law, is known as electrostatics. We introduce the idea of a magnetic charge encircling charges. The electric current near a line and a plane are examples that we go through as we create detailed definition for both "electric potential" and "voltage."

What is an example of electrostatics?

Examples involving electrostatic forces are: With the aid of a comb, we can create electrostatic force when i pass a piece of paper through to the oil in my heads. When one balloon is brushed with hair, the other balloon becomes drawn to it.

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An electron of mass m and charge -e is moving through a uniform magnetic field B=(B2,0,0) in vacuum. (Figure 1)At the origin, it has velocity v = (vx, Vy, 0), where vx >0 and Vy > 0. A screen is mounted perpendicular to the x axis at a distance D from the origin. Throughout, you can assume that the effect of gravity is negligible. First, suppose B, = 0. Find the y coordinate y of the point at which the electron strikes the screen. Express your answer in terms of D and the velocity components V, and Vy. View Available Hint(s) Figure 1 of 1 Now suppose B > 0, and another electron is projected in the same manner. Which of the following is the most accurate qualitative description of the electron's motion once it enters the region of nonzero magnetic field? O The electron decelerates before coming to a halt and turning around while always moving along a straight line. O The electron's motion will be unaffected. (It will continue moving in a straight line with the same constant velocity.) O The electron moves in a circle in the xy plane. screen O The electron moves along a helical path about an axis parallel to the field lines with constant radius and constant velocity in the x direction.

Answers

C:The electron moves in a circle in the xy plane.

What is electron ?

Electron is a free and open-source framework created by GitHub that helps developers build cross-platform desktop applications with HTML, CSS, and JavaScript. Electron is based on Node.js and Chromium, making it a powerful tool for creating native applications with web technologies. Electron enables developers to build desktop applications that can run on Windows, Mac, and Linux, as well as Android and iOS devices.

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A medical defibrillator stores 950 J of energy in a 100uF capacitor.
What is the voltage across the capacitor?
If the capacitor discharges 350J of its stored energy in 3.1ms , what power is delivered during this time?

Answers

Power is given at p=1.13 *10^(-5) throughout this period.

An electrical component that can store and release electric energy is a power capacitor. The device comprises of one or more pairs of plates that are connected to two terminals and allow the stored energy to be released into a circuit as needed. The plates are separated from one another by an insulating material (the dielectric). By removing the reactive power from the supply line, a capacitor aids in the improvement of power factor.

This is accomplished through the capacitor's storage of magnetic reversal energy. Power is defined as energy multiplied by the frequency of an operation. (a) Computation needs switching from one voltage (V 1) to another voltage (V 2) before most likely returning to a starting voltage (like V 1).

Power = u/t

p = 350/(3.1*(1/1000))

p= 1.13 *10^(-5)

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Why is static flexibility important?

Answers

Static stretching promotes range of motion (ROM), reduces musculotendinous stiffness, and lowers the risk of acute muscle strain injuries by relaxing and lengthening the muscles.

Benefits and objectives:

Static is primarily used for variables or methods that are constant across all instances of a class. Static stretching has the potential to reduce discomfort and stiffness after a workout while also enhancing flexibility and range of motion. To help you feel more relaxed, static stretching is a fantastic approach to help your muscles release stress and tension. It is quite efficient to improve flexibility in this way. You should incorporate static stretches into your cool-down routine to help prevention of injury.

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________ are designed to smother a small fire and are very useful in putting out a fire on a person.

Answers

An extinguishing agent, including such water or chemicals, is stored in a fire extinguisher. It is not intended to put out a large fire, only a small one.

How do fire extinguishers function?

To burn, fire needs fuel, heat, and oxygen. In order to stop a fire from spreading, fire extinguishers use a substance to reduce the heat of the flames, smother the fuel, or cut off the oxygen supply. If used by a trained person, a portable fire extinguisher can quickly put out a small fire.

Why is the red fire extinguisher?

First off, red is the color linked to both danger and fire, making fire extinguishers an obvious association. Second, red is the color that is easiest to see, particularly in darker settings like a smoke-filled

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What is the lever arm between F and the pivot point?

Answers

A revolving bar that pivots on a fixed point serves as the lever arm between F and the pivot point.

The pivot is the elbow, while the forearm acts as the lever arm. The biceps muscle exerts the effort and bends the forearm in spite of the forearm's weight and whatever additional weight the hand may be carrying. The weight is farther away from the pivot than the effort.

The lever is a rotating bar that pivots on a fulcrum affixed to a fixed point. By applying forces at different angles in reference to the pivot or fulcrum, the lever generates motion. When the lever spins around the fulcrum, points farthest from it move faster than ones nearer to it.

The lever is a rotating bar that pivots on a fulcrum affixed to a fixed point. By applying forces at different angles in reference to the pivot or fulcrum, the lever arm generates motion. When the lever spins around the fulcrum, points farthest from it move faster than ones nearer to it.

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How does kinetic energy play a role in phase change?

Answers

During phase shift, the substance's molecules' average kinetic energy remains constant.

How does kinetic energy affect phase change?

Simply put, molecules move more quickly as kinetic energy rises. Nevertheless, molecules change phases when potential energy rises. The molecule changes phases as a result of an increase in potential energy.

In a phase change, matter moves from one state to another either by gaining energy through heat and entering a more energetic state, or by losing energy through heat and entering a state with lower energy.

The energy supplied during phase change is only used to separate the molecules; none of it is used to boost the kinetic energy of the molecules. Therefore, since the molecules' kinetic energy is constant, its temperature won't increase.

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When you wear a backpack, your center of gravity shifts in which direction? A. up. B. back. C. forward. D. up and back

Answers

When we wear the backpack, the center of gravity will go to the back and up direction.

A location established in relation to an object or set of objects is the center of mass. It represents the system's average location as weighted by each component's mass. The center of gravity for straightforward stiff objects with homogeneous density is found at the centroid.

Because the center of mass of any body is situated where the majority of the body mass is concentrated, when we wear a backpack, the center of mass shifts toward the up and back.

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The tape in a videotape cassette has a total length 196 m and can play for 2 h. As the tape starts to play, the full reel has an outer radius of 48 mm and an inner radius of 14 mm. At some point during the play, both reels will have the same angular speed. What is this common angular speed

Answers

Both reels will rotate at the same pace at some time throughout the game. This usual angle of rotation is 0.763 rad/s.

Given data:

The total length of the videotape cassette is, L = 196 m.

The time interval for the play is, t=2h=2×3600=7200s

The outer radius of the tape is, r₀ = 48mm

The inner radius of the tape is, r[tex]_{i}[/tex] = 14mm

The rotating motion of the videotape is indicated by the value of the angular velocity, which is as follows:

[tex]\omega=\frac{v}{r}[/tex].............................................................................(1)

Here, v denotes the cassette's linear speed, while r denotes the cassette's effective radius.

r=[tex]\sqrt{ \frac{r_{o}^{2} + r_{i}^{2} }{2} }[/tex]

r= [tex]\sqrt{ \frac{48^{2} + 14^{2} }{2} }[/tex]

r=35.35 mm

r ≅ 0.03535 m

And the cassette's linear speed is specified as,

[tex]v=\frac{L}{t}[/tex]

[tex]v[/tex] = 196/7200

[tex]v[/tex] = 0.027 m/s

Substitute the values in equation (1) as

[tex]\omega[/tex] = 0.027/0.03535

[tex]\omega[/tex] = 0.763 rad/s

As a result, we can infer that at some point throughout the game, both reels will be spinning at the same speed of 0.763 rad/s.

The angle of rotation in mathematics is a measurement of how much, specifically by what angle, a figure is rotated about a fixed point, frequently the center of a circle. Since an anticlockwise revolution of 310 degrees is equivalent to a full turn of 360 degrees because 310 degrees plus 50 degrees equals 360 degrees, an anticlockwise rotation of 310 degrees is also referred to as a rotation of -50 degrees.

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What happens to matter when thermal energy is added to a substance at its melting and boiling point?

Answers

Endothermic processes occur when heat is applied to a substance, as in melting, evaporation, and sublimation. Heat increases the speed of the molecules in this case, forcing them to travel quicker.

Thermal energy is the energy contained inside a system that controls its temperature. The passage of thermal energy is defined as heat. Thermodynamics is a discipline of physics that deals with how heat is transmitted between various systems and how work is done in the process (see the first law of thermodynamics).

Thermal energy transmission is classified into three types: conduction, radiation, and convection. Convection is a cyclical process that happens exclusively in liquids.

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Deviance has an effect on social power. How is this BEST demonstrated?


A. Powerful people in society keep their power by defining the laws of deviant behavior.


B. People with little power perform more questionable acts with fewer consequences than the more powerful people.


C. All groups that follow cultural norms tend to have a large amount of social power in society.


D. Someone who doesn't follow norms in a society always gains power because other people will rebel with them.

Answers

Deviance has an effect on social power. Then, Powerful people in society keep their power by defining the laws of deviant .

Forms of Deviant Behavior Deviant Behavior Based on Nature

Based on the nature is divided into two kinds, namely negative behavior and positive behavior.

a. Positive deviant behavior

Positive behavior is deviant behavior that gives or has a positive impact on social life, because it has innovative elements and ideas that emerge are also creative, so as to enrich people's insights.

Positive behavior is also directed primarily at the values to be achieved together as well as social interests and is often considered as something ideal in society. Positive behavior will usually be accepted by society, because it is a form of development and adjustment to the times.

b. Negative deviant behavior

Negative behavior is the opposite of positive behavior.

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Answer:

a

Explanation:

How far do you have to move the moon so the force of gravity on it doubles?

Answers

The gravitational attraction between two objects grows in strength with each object's mass. The gravitational force between two objects doubles when one of the objects' masses doubles.

Is gravity 9.8 meters?

The acceleration that gravity imparts to objects falling freely is used to quantify gravity. At the surface of the Earth, gravity accelerates at a rate of around 9.8 meters (32 feet) per second. As a result, an object in free fall accelerates by 9.8 meters per second for every second that it is falling.

Is the gravitational field constantly 9.8 N kg strong?

The gravitational field strength of the Earth is 9.8 N/kg. Accordingly, an item will feel 9.8 N of force for every kg of mass. That weight of a thing is lower if the gravitational field is weaker. The Moon, for instance, has a gravitational field that is 1.6 N/kg strong.

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Can you help me please for exercise 2.
In the film Alone on Mars, Mark Watney faints in the rocket responsible for bringing him back to the ship
major. His colleague comments: “He has just taken 13 g, give him two minutes”. Before
going on an expedition, astronauts are prepared to undergo strong accelerations, commonly
quantified in g. On Earth, when a rocket "goes up to 1 g", it means that its speed increases by 10
meters per second, in one second.
The positions successively occupied by Mark have been represented. The duration separating
each position is equal to 0.50 seconds.
+M.
1) Calculate the values ​​of the speeds vo
and go.
2) Prove that the variation of the
speed between times t. and t4 is:
AV = VA - VO = 260 m.s-1
3) What is the time interval At
separating position to and tA?
4) The acceleration 'a' is given by the
formula a = :
If, calculate the acceleration of
Mark between the M. and MA positions
Compare this acceleration with the
g-value. The sentence "He has just
take 13 g»>, it seems to you
correct?
Exercise 3: movement of the Moon (5
pt)
The Moon, the only natural satellite of the
Earth, is in orbit around it
for billions of years. Four
times smaller than the Earth, it puts.

Answers

The velocity, time and acceleration motion of Mark Watney rocket as he moves from M₀ to M₄ is described as follows;

1) v₀ = initial velocity = u

v₄ = u + 260 m/s

2) Δv = u + 260 m/s - u = 260 m/s

3) Δt = 2 seconds

4) Mark's acceleration is 13·g

What is motion under acceleration?

Acceleration is the rate of change of velocity. Motion under a constant acceleration is one in which the velocity of the object changes as time changes.

The scale of the graph is 5 units = 46 meters

The distance between M₀ and M₄ = 25.5 units

1 unit = 46/5 meters/unit

25.5 units = (46/5) m/unit × 25.5 units = 234.6 meters

The time between M₀ and M₄ = 0.5 s × 4 = 2 s

= 25.5 unit × 0.5 s/unit = 12.75 s

The speed at M₄, v₄ =

The location of M₀ = 0

The location of M₄ =

The values of the speeds are;

The distance be

1) The time at M₀, t₀ = 0

The time at t₄ = 2 s

The speed, v = u + a·t

Where;

u = The initial velocity of the rocket

a = The acceleration = 13·g = 13 × 10 m/s² = 130 m/s²

The speed at v₀ = u + 130 m/s² × 0 s = u

The speed at v₄ = u + 130 m/s² × 2 s = 260 m/s

2) The variation of the speed between v₄ and v₀, Δv, is found as follows;

Δv = v₄ - v₀

Therefore;

Δv = 260 m/s - 0 m/s = 260 m/s

3) The number of change in position from M₀ to M₄ is found as follows;

M₀ to M₁M₁ to M₂M₂ to M₃M₃ to M₄

The number of 0.5 seconds between M₀ and M₄ = 4

The time difference between t₀ and t₄ is therefore;

Δt = t₄ - t₀ = 2 seconds

4) The formula for the acceleration is; [tex]a = \dfrac{\Delta v}{\Delta t}[/tex]

Therefore, the acceleration between positions M₀ and M₄ is found as follows;

The speed at M₀ = u

Speed at M₄ = u + 260 m/s

t₄ - t₀ = 2 seconds

[tex]a = \dfrac{u+260 \, m/s - u}{2\, s} = 130\, m/s^2[/tex]

The value of the acceleration due to gravity, g ≈ 10 m/s²

Therefore, a = 13·g

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find the rise in temperature when given: 1.original length(2.0m),2.linear expansivity(25),3.increase in length(3.0mm)​

Answers

According to the answer the rise in temperature is 0.12K..

What is temperature?

Temperature is a measure of the average kinetic energy of particles within a substance. It is measured in degrees on a wide range of scales such as Celsius, Fahrenheit, and Kelvin. Temperature is an important indicator of a material’s state and behaviour, as it influences the rate of chemical reactions and the physical properties of materials. Temperature also affects the flow of heat and the direction of heat transfer. For example, heat flows from hot to cold, and cold air will sink while warm air will rise. Temperature is also used to measure the average kinetic energy of molecules in a gas, which ultimately determines its pressure and volume. Temperature is an important environmental variable, as it affects the Earth’s climate and weather.

The rise in temperature can be found using the formula for linear expansivity, which states that the change in length is equal to the linear expansivity multiplied by the change in temperature.
Change in length(ΔL) = Linear expansivity(α) × Change in temperature (ΔT)
Therefore,
3.0mm = 25 × ΔT
ΔT = 3.0mm/25
ΔT = 0.12K
Therefore, the rise in temperature is 0.12K.

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Which graph shows the change in velocity of an object in free fall?

Answers

Answer: B

Explanation:

Free fall -> constant acceleration of g = 9.81ms-1

Constant acceleration -> velocity increases at a constant rate (increases proportionally with time)

Math behind it:

* Velocity is the integration of acceleration, likewise acceleration is the differentiation of velocity. Integrating a constant value gives linearly increasing function in terms of x. (integrating with respect to x)

Hence, graph B shows the trend that velocity increases at a constant rate.

Graph A - Velocity decreases linearly

Graph C - Also decreases nonlinearly

Graph D - Not possible scenario. Velocity approaches infinity.

Why is countercurrent considered more effective?

Answers

The gills of fish have a structure known as "countercurrent oxygen exchange" that increases the quantity of oxygen that can be taken up by the blood.

They accomplish this by increasing the amount of time that their blood is in contact with water that has more oxygen while the blood absorbs more oxygen.

The ability to extract a greater amount of the heating fluid's heat is one of the major benefits of counter-current flow. It is significant to notice that at the same terminal temperature, the LMTD value for counter-current flow is significantly higher than for concurrent flow. The streams enter the heat exchanger at the opposing ends in the countercurrent mode.

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What measure do we use to determine the amount of potential energy in a battery?

Answers

The amount of energy stored in a battery is measured in watt-hours (Wh), kilowatt-hours (kWh), or ampere-hours (Ah) (Ahr).

What is the potential energy means?

Potential energy is stored energy that is affected by the relative position of various components of a system. When a spring is squeezed or extended, its potential energy increases. A steel ball has higher potential energy when lifted above ground than when it falls to Earth.

What is the potential energy means?

Because every item moved from its resting posture has stored energy, it is referred to as potential energy because it has the ability to accomplish work when released.

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