A 64.5 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a 12.0 kg oxygen tank in a direction away from the shuttle with a speed of 14.9 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut starts from rest, find the final speed of the astronaut after throwing the tank.

According to the given statement The temperature of the air in this experiment is dependent variable.

Material refers to a thing that something else is made out of. Material can also refer to cloth or can be used to describe something that is made of matter and exists in the physical world. Material has many other senses as a noun and an adjective.

A material is any substance that an object is made from. Glass, chalk, paper, wax, water, air, clay and plastic are all different materials. All materials are made up of matter.

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The maximum possible thermal efficiency of the system is d. 67.9%.

By utilizing the physics of heat engines and Second Law of Thermodynamics, we can calculate that the maximum achievable efficiency of a heat engine with a hot reservoir at 515 k and a cold reservoir at 190 k is 67.9%.

This result serves as an upper limit for all practical engines, regardless of the specifics of their design or engineering capabilities.

Making this maximum efficiency is possible through improvements in technology and increased knowledge on thermodynamics and energy production.

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Answer: A.

63.1%

Explanation: edmentum

A skier of mass m starts from rest at the top of a solid sphere of radius r and slides down its frictionless surface.

The net force on the skier in the radial direction must be equal to the centripetal force in order to sustain circular motion.

where [tex]v[/tex] denotes the skier's tangential instantaneous speed. Gravity and the normal force are the two forces at work on the skier. While the gravitational force is constantly radially outward, the normal force is always dependent on the angle [tex]\theta[/tex]. Therefore, the net force in the radial direction is, if the skier is at an angle of [tex]\theta[/tex] down the sphere.

[tex]$F_{\text {radial }}=m g \cos \theta-N$[/tex]

where N is the normal force's magnitude. When these two equations are combined, we get,

[tex]$\frac{m v^2}{r}=m g \cos \theta-N$[/tex]

Using the principle of energy conservation, we now substitute v with values we already know. The loss of potential energy equals the increase in kinetic energy, which on a sphere is written as,

[tex]$\frac{1}{2} m v^2=m g r(1-\cos \theta)$[/tex]

As the skier begins at rest, there is no kinetic energy at the top of the sphere. After removing [tex]v^2[/tex], we are left with the equation,

[tex]$2 m g(1-\cos \theta)=m g \cos \theta-N$[/tex]

Quantifying the situation when the skier exits the sphere is the last aspect of the issue. We can see that when theta equals 0, we get N = mg, which means that the normal force acting on the skier precisely balances the force of gravity. N decreases as the skier descends the sphere's surface, balancing the equation until it equals zero at a certain angle. This occurs precisely when,

[tex]$2 m g(1-\cos \theta)=m g \cos \theta$[/tex]

The skier is no longer in contact with the sphere when the normal force acting on the skier is zero, as the sphere no longer exerts any force on the skier. This is assumed to be the prerequisite for the skier to leave the ground.

After calculating [tex]\theta[/tex], we have,

[tex]$2 m g=3 m g \cos \theta$[/tex]

[tex]$\Longrightarrow \theta=\cos ^{-1}(2 / 3) \approx 48.19^{\circ}$[/tex]

First, we can note that this response is unaffected by the physical parameters m, r, and g. No matter how heavy he is, how huge the sphere is, or how powerful gravity is, the skier will exit the sphere at the same angle.

However, we will discover from dimensional analysis that this independence is actually not all that remarkable. Consider the units of the variables we've provided,

[tex]$[m]=$ kilograms,$\quad[r]=$ meters,$\quad[g]=$ meters $\cdot$ seconds $^{-2}$[/tex]

Any algebraic statement containing m, r, and g cannot be transformed into a dimensionless quantity. As a result, we draw the conclusion that the solution to our problem cannot depend on these values as an angle is a dimensionless quantity.

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The amount of heat transferred to or from the system is −720 J. The first law of thermodynamics states that U = Q + W

Where U is the change in the system's internal energy and W is the work performed on it. From the given, we obtain: U = 500 J W = 220 J.

Thus,  = Δ −  = −500 − 220 = −720 J

A process is referred to as adiabatic if there is no heat exchange. This process must be adiabatic because the system's internal energy drops and it is an ideal gas.

As a result, in adiabatic operations, the temperature of the gas rises as its volume decreases. This is due to the temperature shift being fueled by the gas's increased effort.

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Answer:  D.

-720 joules

Explanation: plato :)

The student with a 59-kg mass moves to the right with a velocity of 1.46 m/s.

According to the law of conservation of momentum, The overall momentum of two or more bodies acting on one another in an isolated system stays constant unless an external force is introduced.

The student with a mass of 48 kg moves to the left with a velocity of 1.8 m/s.

Let the student with a mass of 59 kg moves to the left with a velocity of v m/s.

As no external force applied,

48 kg × 1.8 m/s + 59 kg × v = 0

v = - 1.8 × (48/59) m/s

= - 1.46 m/s.

Hence, the velocity of the second bay is 1.46 m/s in right direct.

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Answer:

a = v2/r, for an object moving with a constant speed, v, around a circle of radius, r. We will also verify that the direction of the acceleration vector is toward the center of the circle.

substitute your numbers into the formula

5.0 = v2/45.0

then cross multiply to get your final answer

The mass of the bouquet can be calculated using the equation m = F/a. Which is equal to 0.9kg.

Since van Gennip’s speed dropped from 10.8 m/s to 10.01 m/s after she took the bouquet, this indicates that a force was applied to her causing her to slow down.

The applied force can be determined by taking the difference between her final and initial momentum, which is p = mv.

Thus, the applied force can be calculated by F = Δp/Δt.

Plugging in the given values, the mass of the bouquet can be calculated as

m = F/a = (63.0 kg × (10.8 m/s - 10.01 m/s))/10.01 m/s² = 0.9 kg.

Therefore, the mass of the bouquet is 0.9 kg.

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Put your finger over P to compute power; this leaves I and V; hence, P = I x V.

The quantity of current multiplied by the resistance equals the potential difference, which is the same as voltage. One Coulomb of charge uses one Joule of energy to move between two locations in a circuit, which is equal to a potential difference of one Volt.

Difference that might exist at all between the two points The amount of work required to move a unit positive charge along any path through one point to another without accelerating is referred to as the electric field.

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The gravitational force between Jupiter and its natural satellite Callisto is 3.76×10∧21 Newton.

The attraction force that exists in between two masses is directly proportional to the product of their mass and is inversely related to the square of the distance between them, according to Newton's universal law of gravitation.

The mass of Jupiter is 1.99 x 10^27 kg

the mass of Callisto is 1.08 x 10^23 kg

By using the formula

F = G M1×M2/ r²

(G = 6.67×10∧-11 )

F = ( 6.67×10∧-11 ×1.99 x 10^27 × 1.08 x 10^23 ) / (1.88 x 10^9)²

F = (13.28×10∧39)/3.534×10∧18

F =3.76×10∧21 Newton.

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Graphite: according to table 1, which of the following materials is the poorest electrical conductor.

What is conductor?

Conductor is an electrical device or material that is capable of allowing electric current to flow through it. It is used in a variety of applications ranging from wiring in buildings to the transmission of electricity over large distances.

Conductors are typically made from metals, such as copper and aluminum, but certain types of materials, such as semiconductors, can also act as conductors.

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Accounting for things like how many team members should be assigned to a task, how many resources are required, how many hours tasks will take and more.

When the effort arm is longer than the load arm, there is a significant mechanical advantage.The lever is made up of two “arms”: The load arm (also known as the output arm) is the portion of the lever that is directly attached to the load. The effort arm (or applied force arm) is the section of the lever to which the effort, or input force, is applied.

A= W P = 1 , Where W represents the load and P represents the effort. So, if we utilize one fixed pulley to raise the weight, the effort required will be 50 k g w t in one direction.

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To determine the value of C, we can use the equation provided: V(x) = Cx^4/3, where x is the distance from the cathode. V(x) = C(13.6 mm)^4/3 = 264V. So, C = 264V / (13.6mm)^4/3

To obtain a formula for the electric field between the electrodes as a function of x, we can use the equation: Ex = -dV/dx

Substituting the equation for V(x) and the value of C obtained in part (a) into the equation:

Ex = -dV/dx = -(d/dx)(Cx^4/3) = -(4/3)Cx^(4/3)

To determine the force on an electron when the electron is halfway between the electrodes, we can use the equation: F = qE

where q is the charge of the electron and E is the electric field at that point. Since the force on an electron is equal to the electric field multiplied by the charge of the electron, we can substitute the value of E obtained in part (b) and the charge of the electron, 1.6 x 10^-19 C, into the equation

F = qE = (1.6 x 10^-19 C) * (-(4/3)C

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If the net force on the cart is 66.0 N, the acceleration of the cart is 1.46 m/[tex]s^{2}[/tex] .

The formula used in the second law of motion to explain the connections between force, mass, and acceleration is Mass + acceleration equals force. F = ma Calculating force in Newtons (N), mass in kilograms (kg), and acceleration in meters per second squared (m/s2) may all be done using this formula.

It is show that,

Mass of cart, m = 45 kg

Net force acting on cart, F = 66 N

Let a represent the rate of acceleration of the cart being pushed. Using Newton's second rule of motion, it can be calculated as follows:

F = ma

a = F/m

a = 66 N/45 Kg

a = 1.46 m/[tex]s^{2}[/tex]

So, the acceleration of cart is  = 1.46 m/[tex]s^{2}[/tex] .

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Answer:

Q = N e     total charge passing point

Q = 2.0E20 * 1.6E-19 coul = 32 coulombs

2)    I = Q / t = 32 C / 60 s = .53 amps

3)   R = V / i = 12 volts / .53 amps = 23 ohms

The properties of stars are:  mass, age, distance, metallicity (chemical composition), variability and motion through space.

An astronomical object known as a star is made up of a bright plasma spheroid that is held together by gravity. The Sun is the star that is closest to Earth.

Other stars are also visible at night with the unaided eye, but because to their great distances from Earth, they appear as stationary points of light. Many of the brightest stars have names, and the most notable stars have been grouped into constellations and asterisms.

Star catalogues have been put out by astronomers that list the known stars and offer standardized stellar labels.

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Answer: Stars produce energy through nuclear fusion.

Stars are massive objects composed of gas.

Stars are composed primarily of hydrogen and helium.

P.S can I get the brainiest?

The frequency of the cart's motion for a distance of 10.0 meters is 0.075 Hz (Hertz), which means the cart completes 0.0775 round trips per second.

1) Period (T):

The period (T) is the time taken for one complete round trip. The cart travels from one end to the other and back in one round trip.

T =  (distance/speed)

T = (10.0 / 0.75 )

T = 13.33 seconds

So, the period of the cart's motion for a distance of 10.0 meters is approximately 13.33 seconds.

2) Frequency (f):

The frequency (f) is the number of complete round trips per unit time. It is the reciprocal of the period.

f = 1 / T

f = 1 / 13.33

f =  0.075 Hz

So, the frequency of the cart's motion for a distance of 10.0 meters is approximately 0.075 Hz (Hertz), which means the cart completes approximately 0.0775 round trips per second.

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The range of wavelength when m = 3 is λ = 8.20 x 10-7 m to 18.7 x 10-7 m (this belongs to infrared radiations).

The wavenumber of hydrogen spectral series is 1/λ = R(1/m2 – 1/n2)

Rydberg constant, R = 1.097 x 107 m-1

1. When m = 1 and n = 2, 1/λ = 1.097 x 107 x (1/12 – ½2) = 0.822 x 107

Wavelength, λ = 1.215 x 10-7 m

When m = 1 and n = ∞

, 1/λ = 1.097 x 107 x (1/12 – 0) = 1.097 x 107

Wavelength, λ = 0.911 x 10-7 m

The range of wavelength when m = 1 is λ = 0.911 x 10-7 m to 1.215 x 10-7 m (this belongs to ultra-violet radiations)

2. When m = 3 and n = 4, 1/λ = 1.097 x 107 x (1/32 – 42) = 0.0533 x 107

Wavelength, λ = 18.7 x 10-7 m

When m = 3 and n = ∞

1/λ = 1.097 x 107 x (1/32 – 0) = 0.122 x 107

Wavelength, λ = 8.20 x 10-7 m

The range of wavelength when m = 3 is λ = 8.20 x 10-7 m to 18.7 x 10-7 m (this belongs to infra-red radiations)

In physics, the wavelength is the spatial duration of a periodic wave—the distance over which the wave's shape repeats. it is the gap between consecutive corresponding points of the same section on the wave, including two adjoining crests, troughs, or 0 crossings, and is a feature of each traveling wave and standing wave, as well as other spatial wave patterns. The inverse of the wavelength is known as the spatial frequency. Wavelength is normally exact by means of the Greek letter lambda (λ). The time period wavelength is also now and again implemented to modulated waves, and to the sinusoidal envelopes of modulated waves or waves fashioned with the aid of interference of several sinusoids.

Assuming a sinusoidal wave shifting at a set wave speed, the wavelength is inversely proportional to the frequency of the wave: waves with better frequencies have shorter wavelengths, and decreased frequencies have longer wavelengths.

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The amount of torque produced if the angle between the force and the lever arm is zero is zero.

The formula for torque is:

Torque (τ) = Force (F) x Lever arm (r) x sin(θ)

This is because torque is defined as the product of force and the perpendicular distance from the line of action of the force to the axis of rotation. When the angle between the force and the lever arm is zero, the force is acting parallel to the lever arm, meaning that there is no perpendicular distance between the force and the axis of rotation, resulting in a torque of zero. In other words, the torque is zero when the force is applied in the same direction as the lever arm.

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Jessica's linear speed is faster.

We must first define linear speed in order to respond to the query.

This is the tangential speed of an item moving in a circle. Given by the formula v = r,

r is the object's distance from the circle's center, and is its angular speed.

Given that Julie, Jessica's sister, is riding an inner horse that is placed 6.0 meters from the center of the merry-go-round and Jessica is riding an outside horse that is 8.0 meters away from the center of the ride. The merry-go-round is also rotating at a consistent speed.

Given that v = r and = constant for linear motion,

So, v ∝ r.

Therefore, the girl who was farther away from the merry-go-center round's would move at a faster linear rate.

Since

Julie is at r, and Jessica is at r' = 8.0 m "= 6.0 m.

Since

r' = 8.0 m > r and v r "= 6.0 m,

Jessica's thus has a faster linear speed.

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X-rays Ultraviolet rays are followed immediately by X-rays. Although they have a shorter wavelength than the UV, they are more energetic.

An X-ray tube is used to create X-rays. When quickly traveling electrons strike a metal object, they are released. Wilhelm Conrad Roentgen made the X-ray discovery in 1895.

The flesh can be penetrated by long wavelength X-rays, but not the bones. They assist doctors in viewing the inside of the body through X-ray imagery. They are helpful in identifying malignancies and bone fractures.

Even metals can be penetrated by short wavelength X-rays. They are applied in industry to check for flaws in welded joints.

All X-rays pose a risk because they have the potential to harm the body's healthy, functioning cells.

This is why exposure to X-rays on a regular basis should be avoided. Body tissues can be harmed by excessive X-ray exposure, which can also lead to cancer.

To create images of the body, its organs, and other internal structures for diagnostic purposes, X-rays use external radiation. A "negative" type image is created when X-rays penetrate human structures and land on specially treated plates (similar to camera film) or digital media (the more solid a structure is, the whiter it appears on the film).

Different bodily components permit various amounts of the X-ray beams to pass through when the body is exposed to X-rays. The majority of the X-ray energy can pass through soft tissues in the body, including blood, skin, fat, and muscle, making them look dark gray on film or digital media. Few X-rays can penetrate dense soft tissue like a bone or a tumor.

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According to the given statement The coefficient of static friction was found to be about 0.0850.

Static friction is a force that prevents an item from moving. The friction encountered when persons attempt to move a stationary object on a surface without actually causing any relative motion between the body and the surface on which it is located.

The graph below depicts the turntable's constant maximum speed and the centripetal acceleration of the coin.

(a) The centripetal acceleration is caused by static friction.

(b) Using the diagram below,

mai^=fi^+nj^+mg(−j^)

Fy=0nmg, thus n=mg, and Fr=mrv2=f=n=mg

Then, \sμ=rgv²=(30.0cm)(980cm/s2)(50.0cm/s)²

=0.0850

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The complete question is -

A coin placed 30.0cm from the center of a rotating, horizontal turntable slips when its speed is 50.0cm/s. (a) What force causes the centripetal acceleration when the coin is stationary relative to the turntable? (b) What is the coefficient of static friction between coin and turntable?

Answer:

C. -35N/m

Explanation:

Using Hooke's Law, we know that the elastic constant of a spring can be found with this formula:
[tex]F=-kx[/tex]

where:

[tex]F[/tex] is the force ( in Newtons)
[tex]k[/tex] is the constant ( in Newtons per meter)
[tex]x[/tex] is the extension ( in meters)

thus, by rearranging the formula we can get:
[tex]k=-\frac{F}{x}[/tex]

[tex]k = -\frac{10}{0.286}[/tex]

[tex]k=-34.96503N/m[/tex]

Rounding off the answer, we get -35N/m

2.49 Joules have been performed on the athlete, in accordance with the provided statement.

In science, the word "force" has a concrete meaning. At this point, referring to a force as a push or simply a yank is perfectly appropriate. An constituent does not "have in it" or "contain" a factor. A force is felt by one entity coming from another. The idea of a force encompasses both living and non-living entities.

You must incorporate the work expression because it is a vital part of Fdx.

Gained is

  W  =  integral of  (  150x  -  190 x 2 ) dx  

         =    75 x2   -  63.333 x3  

So now...

   work done  =   75 *0.202  -  63.333 *0.203   = 2.49Joules

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1) Any mechanical interactions taking place in the process should be frictionless, to make a process perfectly reversible

What is mechanical interactions?

Mechanical interactions are physical forces that are used to affect the behavior of objects and materials. This can include contact forces such as friction, tension, and compression, as well as non-contact forces such as gravity, magnetism, and electric fields

Mechanical interactions can be used to cause objects to move, change shape, or experience a change in energy. These interactions can also be used to create, store, or transfer energy. Mechanical interactions are studied by engineers and scientists in multiple disciplines, and are used in many different applications, including the design of machinery, medical devices, and consumer products.

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Torque is produced by multiplying the length of a lever arm by the force acting perpendicular to the lever arm. There are two conceivable orientations for the scalar quantity torque: clockwise and anticlockwise.

A torque is created when a force is applied perpendicular to a lever arm. The lever arm or moment arm is the length that extends perpendicularly from the pivot point, or the centre of rotation, to the point at which the force is applied. A torque is always defined with reference to a pivot point.

A torque multiplier multiplies the torque applied to the bolt with each gearing level. For instance, a 5:1 torque multiplier will result in an output.For example, a torque multiplier with a 5:1 ratio will result in an output at the shaft that is five times the torque, but the speed will only be one fifth of the original since no energy can be created.

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Swallow the soil it moves and Break the soil into smaller particles.

They don't have bones or other fixed features that might restrict their movement. The body of an earthworm is segmented. Earthworms use the setae, or tiny bristles, that are present on each segment, to assist them hold the dirt as they travel.

An earthworm uses two distinct sets of muscles to move. Longitudinal muscles run the length of the body, while circular muscles loop around each segment. The earthworm extends as a result of the circular muscles contracting, growing longer and thinner.

The earthworm embeds the front of its body in the dirt using its setae. The earthworm now contracts its longitudinal muscles, either making it shorter and wider.

Therefore, Swallow the soil it moves and Break the soil into smaller particles.

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Explanation:

Electrostatic is a force between two non-conductors

while

Friction oppose the relative motion between two surface or object.

Answer:

  A.  35 °C

Explanation:

You want to know which of the temperatures 5, 10, 15, or 35 °C is most favorable to mosquito breeding.

Mosquitos are nonfunctional below 50 °F (10 °C), and are lethargic at 60 °F (15.6 °C). They prefer 29 °C, and their breeding falls off at higher and lower temperatures.

Of the temperature choices offered, mosquitos would breed fastest at 35 °C.