Answer:
8.3 m/s
Explanation:
Here's the answer in m/s:
(10 km)(1000 m/km) = 10000 m
(20 min)(60 s/min) = 1200 s
speed = d/t = 10000m / 1200s = 8.3 m/s
writing connection science Alfred Wegener never convinced the scientific community that continents move on earths surface. Imagine you could send a message to the past. Explain to Wegener in a letter the evidence that he was missing and the theory of plate tectonics.
The letter explaining to Wegener the evidence that he was missing and the theory of plate tectonics is written below:
Letter on the theory of plate tectonicsDear Alfred Wegener,
I am writing to you from the future to tell you that your theory of continental drift has been proven to be true. However, I understand that during your lifetime, you were not able to convince the scientific community of the validity of your ideas. I want to share with you some of the evidence that was discovered after your time that helped to solidify the theory of plate tectonics.
Firstly, the discovery of the mid-Atlantic Ridge in the 1920s provided evidence for the existence of a divergent boundary. This underwater mountain range, which runs down the center of the Atlantic Ocean, is evidence of the separation of the North American and Eurasian plates. Another key piece of evidence is the matching of rock formations and fossil records on opposite sides of the ocean.
Furthermore, the study of earthquakes and volcanoes also helped to support the theory of plate tectonics. The locations of earthquakes and volcanoes corresponded with plate boundaries, and the movement of these plates could explain their occurrence.
In conclusion, I hope this letter has helped to provide you with some of the evidence that was missing during your lifetime and helped to solidify the theory of plate tectonics. Your contributions to the field of geology were crucial in helping scientists to understand the movement of the Earth's crust.
Yours Sincerely,
John Philips
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What are the 5 types of electrical incidents?
Electrical burns can occur in a variety of ways, including arc burns, low voltage burns, high voltage burns, mouth burns, flash burns, and flame burns.
What are electrical incidents?Electric shock, a serious electrical mishap, or a fatal electrical event are all considered electrical incidents.
For the purposes of reporting and analysis, incident definition types let you attribute the appropriate type to safety events. Having only the two types of incidents—Accident and Near Miss—is one strategy.
An occurrence or scenario that has a number of serious repercussions and necessitates the implementation of special measures by one or more emergency responder agencies is referred to as a big incident.
Any electrical incident that results in or has the potential to result in: death or serious bodily harm to a person; significant property damage; or a serious risk to the public safety must be reported, according to the Electrical Safety (General) Regulations of 2019.
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if energy of 10 watts is transferred into a chamber of helium, how long does it take to vaporize 1 kg of liquid helium
energy takes 25 atmospheres of pressure to evaporate 1 kilogrammes liquid helium, and that pressure must be applied at or below the freezing point of helium, which is 458 °F.
How is helium in liquid form transported?From manufacturing sources to stockpiling and transfill facilities, liquid helium is normally delivered. Tankers with a capacity of 5,000 and 11,000 gallons have an annular space that is vacuum-sealed, nitrogen-shielded, and has multiple layers of insulation.
How is liquid helium produced?You need to chill helium gas to just a few temperatures above absolute zero in order to produce the liquid & superfluid states. By compressing the air and then releasing it through a tiny nozzle, this is accomplished. If you've used any aerosol, you may have noticed that the gas rapidly cools as it expands.
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Diana raises a 1000 N piano using a set of pulleys. She use 250 N force to pulls in 20.0 m of rope. What is the distance
Using a set of pulleys, Diana hoists a piano weighing 1000 N. To draw in 20.0 m of rope, she applies 250 N of force. The separation is 5m.
given,
Load force = 1000 N
Effort distance = 20.0 m
Effort force=250N
If this were an ideal machine, we could calculate the force Diana applied as follows:
The equation that follows links load force to effort force for a perfect machine;
Effort force × effort distance = Load force × Load distance
When we enter the parameters into the formula, we get;
Load distance = Effort force × effort distance/Load force
=250×20/1000
= 5 m
Load distance = 5 m
In mechanics, force is any action that tends to maintain or alter the motion of a body or distort it. The concept of force is commonly explained in terms of Isaac Newton's three laws of motion, as stated in his Principia Mathematica (1687). Newton's first principle states that a body at rest or moving at a uniform rate in a straight line will remain in that state until some force is applied to it. The second law states that when an external force acts on a body, it causes an acceleration (change in velocity) of the body in the direction of the force.
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What is the wavelength of longitudinal wave
0. 250 moles of gas are in a piston. The gas does 109 J of work while 240 J of heat are added. What is the change in internal energy?
(Be careful with + and - signs. +W = expansion, +Q =added, +ΔU = temp goes up)
Thank you!
For 0. 250 moles of gas in a piston, the change in internal energy is +131J. While 240 J of heat are supplied, the gas produces 109 J of work. The energy is a thermodynamic system's internal energy.
With the exception of the energies that are determined by how the system interacts with its environment, the system as a whole's kinetic energy of motion and potential energy with respect to external force fields are all that are contained within it. A typical kind of skin development are moles. Clusters of pigment-forming cells are what give them their common appearance as small, dark brown dots (melanocytes).
Internal energy change for U = Q+W is 240+(-109) = +131J.
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Why is countercurrent flow better for dialysis?
The countercurrent flow is better for dialysis because-
The dialysate flows in the opposite direction from the blood. More urea and creatinine are removed from the blood as a result of the dialysate and blood flowing counter-currently, which optimizes the concentration gradient of solutes between the two fluids.
All throughout the dialyzer's length, countercurrent flow optimizes the concentration gradient between blood and dialysate Small solute clearance falls by 10% when blood flow and dialysate flow are cocurrent (moving in the same direction). Because they produce a more consistent temperature difference between the fluids along the whole length of the fluid channel, counter flow heat exchangers naturally outperform parallel flow heat exchangers in terms of efficiency.As an illustration, a faster blood flow rate boosts clearance by increasing the volume of blood evacuated each minute7. Additionally, a quicker dialysate flow rate results in more solutes being removed from the dialysate fluid, increasing the concentration gradient and the clearance rate8–10.To know more about dialysis here
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In a transformer, energy is carried from the primary coil to the secondary coil by
A. The magnetic field in the iron core
B. The electrical heating of the primary coil
C. Electricity conducted through the iron core
D. The difference in voltage between the primary and secondary coils.
In a transformer, energy is carried from the primary coil to the secondary coil by The magnetic field in the iron core.
What is transformer?
A Transformer is an electrical device used to increase or decrease the voltage provided to an electrical circuit. It is made up of two or more coils of wire wound around a common core. The coils are typically referred to as the primary and secondary winding. Electricity flowing in the primary winding creates a magnetic field, which in turn induces a voltage in the secondary winding. The ratio of primary to secondary winding determines the output voltage. Transformers are used extensively in the electricity distribution network, enabling the safe and efficient transmission of electricity over long distances.
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A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is
A toy elevator is raised from the ground floor to the second floor in 20 seconds. The power needed using 1000 J of work, is 50 W, the calculation is like 1000J of work / 20 seconds = 50W.
Power is measured in Watts (W) which is a unit of energy per time. This means that when you divide the total energy (1000J) by time (20 seconds) it will give you the power (50W). In other words, power is the rate at which energy is expended over a given period of time. The higher the power, the faster the elevator will go. In this case, 1000J of work divided by 20 seconds gives you a power of 50W, which is enough to move the elevator from the ground floor to the second floor in 20 seconds.
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What is the spring constant of a spring of negligible mass which gained 8 joules of potential energy as a result of being compressed 0.4 meter
Answer:
[tex]100N/m[/tex]
Explanation:
The formula to find the spring constant given the potential energy and sprint displacement is:
[tex]E=\frac{1}{2} kx^{2}[/tex]
where:
[tex]E[/tex] is the energy ( in Joules)
[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=2\frac{E}{x^{2} }[/tex]
[tex]k=2\frac{8}{0.16}[/tex]
[tex]k=2*50=100N/m[/tex]
Three point charges are arranged at the corners of a square of side L as shown in (Figure 1) What is the potential at the fourth corner (point A)? Express your answer in terms of the variables Q, L, and the Coulomb’s constant k.
The potential at the fourth point will be [tex]\frac{k^3Q}{\sqrt{L}}[/tex]
Let q1= -2Q and q2 = 6Q. ( k.)
What does charge number three's value, q3, equal?
To remedy the issue, the charges' orientation is also necessary.
You might try using the formula (kQ/r) to get the potential at the fourth corner.
Electric potential is a scalor, therefore adding the values from the three sites is as simple as adding them all together.
The effort required to transfer a unit charge against an electric field from a reference point to a specified spot. Earth is typically chosen as the reference point, however, any location beyond the range of the electric field charge can be utilized. potential electricity.
for instance, q1=-Q, L from the 4th point
q2=3Q and the fourth point's root is L.
The solution to q3= Q L from the fourth point is just [tex]-\frac{kQ}{L} + \frac{k^3Q}{\sqrt{L}} +\frac{kQ}{L} = \frac{k^3Q}{\sqrt{L}}[/tex] (at the fourth point)
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The missing diagram is attached below:
what is the relationship between star temperature and luminosity in the main sequence
The relationship between star temperature and luminosity in the main sequence is known as the main sequence mass-luminosity relationship.
What is luminosity?
Luminosity is the amount of light and other forms of electromagnetic radiation emitted by a star, galaxy, or other celestial object. It is typically measured in units of watts per square meter (W/m2). Luminosity is related to the total energy output of a star or other celestial body and is an important factor in determining its temperature, composition, and other physical properties.
This relationship states that the hotter the star, the more luminous it is. This is because hotter stars are more massive and more luminous than cooler stars. As the star's temperature increases, so does its luminosity.
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two blocks are connected by a string of negligible mass that passes over massless pulleys
If two blocks are connected by a string of negligible mass that passes over massless pulleys, the system can be analyzed using the principles of Newton's second law and the conservation of energy.
What is Newton's second law? In this scenario, the net force acting on each block is the tension in the string, which is equal in magnitude for both blocks. Therefore, if the blocks have different masses, they will have different accelerations. In this scenario, the mechanical energy of the system is the sum of the gravitational potential energy and the kinetic energy of the blocks. If the pulleys are massless and frictionless, then the mechanical energy of the system will be conserved.In summary, the two blocks will move together with the same acceleration if the pulleys are massless and frictionless.To learn more about newtons second law refer:
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Electromagnetic radiation is a kind of (1) ____________________ that behaves like a(n) (2) ___________________ as it travels through space. (3) __________________ is one type of electromagnetic radiation. Other examples include X-rays, radio waves, and microwaves.
A type of (1) energy known as electromagnetic radiation acts in space like a(n) (2) wave. (3) One kind of electromagnetic radiation is light. Microwaves, radio waves, and X-rays are some further examples.
What does electromagnetic radiation refer to?radiation with a magnetic and electrical field that moves in waves .It derives from both organic and artificial sources. The energy levels of electromagnetic radiation might be low or high. It is made up of radio waves, microwaves, infrared photons, visible light, uv irradiation, x-rays, and gamma rays.
From top to bottom energy, the components of the visible radiation are refer to as gamma radiation, X-rays, Uv rays, photons, infrared rays, and radio waves. Microwave waves, like those used in microwave ovens, are a subset of the electromagnetic spectrum's radio wave category.
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15. A uniform beam AB of length 100m and weight 20N rests on a supports P and Q placed 20m from each end of the beam. Weights of 50N and 5N are placed at A and B respectively. Calculate the reaction at P and Q.
PLS I BEG SHARP RESPONSE
Answer:
Peter and John is a plate of rice together peterhead 2/5 of the quantity of rice white drone x 1/3 who ate more food than the other
If an electric heater is rated at 15,000 W, and the voltage used is 240 V, what size breaker in amps would be required
The current required by the electric heater which has the power of 15,000 W is 62.5 A
The power of the heater = 15,000 W
The voltage used by the heater = 240 V
The current required by the electric heater can be found using the formula,
P = VI
where P is the power of the electric heater
V is the voltage used by the electric heater
I is the current required by the electric heater
Let us rearrange the above equation in order to get the current required by the heater is
I = P/V
Let us substitute the known values in the above equation, we get
I = 15,000 / 240
= 62.5 A
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Mechanical energy starts the Ferris wheel, charging the lights along the seats, showing Choose energy. The full Ferris wheel begins to move going from Choose to Choose energy.
Mechanical energy is used to start the Ferris wheel, providing the initial rotation and motion to the wheel.
The motion of the wheel then causes the lights along the seats to be powered, allowing them to light up as the wheel turns. The wheel is then able to generate kinetic energy as it moves, which it then uses to continue turning.
As the wheel turns, it transfers its energy from mechanical to kinetic, and this energy is used to keep the wheel moving from start to finish. Kinetic energy is also used to power the centrifugal force which keeps the riders in their seats as the wheel turns, allowing them to enjoy the ride.
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Mechanics sometimes use a piece of pipe to lengthen the handle of a wrench when trying to remove a very tight bolt. How does this make it easier for the mechanic to remove the bolt
Answer:
increase the length of the handle from the bolt, the torque will increase even if you have the same force
Explanation:
It allows them to apply more torque to the bolt. Torque is the turning or twisting force that causes rotation, in this case, it's applied to the bolt in an effort to loosen it. By lengthening the handle of the wrench, the mechanic is able to leverage more of their body weight and strength behind the wrench, increasing the torque they are able to apply to the bolt.
When a bolt is very tight, it can be difficult to turn it with a standard wrench. The increased torque provided by the longer handle allows the mechanic to apply more force to the bolt, which can help to loosen it. This can be particularly useful in situations where the bolt is corroded, rusted, or otherwise stuck due to a buildup of debris or other factors.
A boy with a mask of 20 is running at 3 m/s what is his kinetic energy
Important Formulas:
[tex]KE=.5mv^2[/tex]
Kinetic energy(measured in joules) = .5 * mass(measured in kg) * velocity(measured in m/s)^2
__________________________________________________________
Given:
[tex]m=20kg[/tex]
[tex]v=3m/s[/tex]
[tex]KE=?[/tex]
__________________________________________________________
Finding kinetic energy:
[tex]KE=.5mv^2[/tex]
[tex]KE=.5(20)(3)^2[/tex]
__________________________________________________________
[tex]\fbox{KE = 90 Joules}[/tex]
What is the index of refraction of a refractive medium which slows the light to 1.88 x 10^8 m/s. What the index of the second medium
If the index of refraction of a refractive medium slows the light to 1.88 x 10^8 m/s. The index of the second medium is: 1.60.
How to find the index of the second medium?Using this formula to find the index of the second medium
n = c/v
Where:
n = refractive index of the medium
c = velocity of light in vacuum
v = velocity of light in the medium.2
Let plug in the formula
n = (3 x 10^8 m/s)/ 1.88 x 10^8 m/s
n = 300,000,000/188,000,000
n = 1.595
n = 1.60 (Approximately)
Therefore we can conclude that the refractive index of the medium is 1.60.
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why should a counterweight be moveable
A weight known as a counterweight is one that stabilizes and balances a mechanical system by exerting an opposing force.
Why do moveable flight control surfaces have large counterweights installed in the leading edge?A counterweight's function is to speed up and improve the efficiency of lifting the load, which conserves energy and reduces wear and tear on the lifting apparatus. A weight known as a counterweight is one that stabilizes and balances a mechanical system by exerting an opposing force.
To lift loads up to 120 tons, tower cranes are utilized at large building sites. In a tower crane, a fixed and a moveable counterweight are held by two arms that extend from the center of the structure. For the purpose of balancing the load, the operator moves the mobile counterweight.
For the purpose of providing offset forces in the flight controls, counter weights are used. With less pressure needed to move the controls, this gives them better "feel" and "feedback" forces.
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A counterweight should be moveable so as to make lifting the load in a faster and more efficient manner.
What is a counterweight?A counterweight is a weight which has a major purpose to help maintain the stability and balance of a mechanical system by exerting an opposing force. A counterbalance or counterweight is usually used to lift a load more quickly and effectively, which saves energy and reduces wear and tear on the lifting apparatus used with it.The potential energy obtained is equivalent to the work done to lift the counterweight.When the counterweight is being displaced by a force that is acting in the same direction as the applied force, the potential energy gained is equal to that distance it is working or kept.To know more about counterweight visit
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A person jogging from the forest to the office covers the 6,800 meters in 2 hours. Their speed is not constant and they slow down and speed up at various times. What is their average velocity
The required average velocity of a person jogging from the forest to the office is calculated to be 0.94 m/s.
Given that,
Total displacement = 6800 m
Total time = 2 hrs
Speed is not constant and varies with time.
Let us convert hours to seconds.
2 hours = 2 × 60 minutes = 2 × 60 × 60 seconds = 7200 seconds
The equation for average velocity is known to be,
"Average velocity = Total displacement / Total time"
Putting in the above given values, we have,
Average velocity = 6800/7200 = 0.94 m/s
Thus, the average velocity is calculated to be 0.94 m/s.
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Use the parallax formula to calculate the distance to each of the following stars. Give your answers in both parsecs and light-years.
Part A
Alpha Centauri: parallax angle 0.7420''.
Express your answer using four significant figures.
Part C
Procyon: parallax angle of 0.2860''. UNITS: pc
Express your answer using four significant figures.
Part D
convert part C to light years
Express your answer using four significant figures.
The parallax formula is used to calculate the distance to a star based on the parallax angle, which is the angle between a star's position in the sky when observed from two points in the Earth's orbit six months apart.
What is distance ?
Distance is the measure of how far apart two objects or points are. It is typically measured in units such as meters, kilometers, miles, or light years. Distance can also be measured in terms of time, such as the time it takes to travel from one point to another.
Distance can either be measured directly, by measuring the physical gap between two points, or indirectly, by using a map, compass, or other navigation tool.
Part A
Distance = 1/0.7420 = 1.3481 parsecs
Distance = 1.3481 * 3.26156 = 4.39 light-years
Part C
Distance = 1/0.2860 = 3.4984 parsecs
Part D
Distance = 3.4984 * 3.26156 = 11.39 light-years
The parallax formula is used to calculate the distance to a star based on the parallax angle, which is the angle between a star's position in the sky when observed from two points in the Earth's orbit six months apart. The formula is simply distance = 1/parallax angle. For both parts A and C, the answer is first given in parsecs and then converted to light-years using the conversion factor of 3.26156 light-years per parsec.
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3. The rougher the surface the ____________ the friction. (Greater or lesser) The _____________ the surface the lesser the friction produced. (Rougher or smoother) 4. Which would b
The rougher the surface the _Greater_ the friction. The _Smooth_ the surface the lesser the friction produced.
The rougher surface has Greater friction, as rough surfaces have more irregularities which lead to interlocking of the surface as a result it increases the friction between two surfaces.
Similarly, in the case of a Smooth surface, there are no irregularities so two surfaces could easily slit without any friction.
Friction is necessary for a number of places so that contact between two surfaces could be improved for walking we need friction and in so many places we try to reduce the friction so that we can save energy.
And we can reduce the friction by applying lubricates between the surfaces, and increase the friction we make the surface rougher.
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Describe the gestalt principles of proximity similarity continuity and closure
Gestalt principles refer to a set of laws in psychology that describe how people perceive visual information. The four principles you mentioned are:
Proximity: Objects that are close to each other are perceived as being related to each other.
Similarity: Objects that are similar in appearance are perceived as being related to each other.
Continuity: People tend to perceive lines and shapes as continuing in the same direction, even if they are interrupted.
Closure: People tend to perceive incomplete shapes as complete, such as seeing a full circle when presented with a set of dots arranged in a circular pattern.
Who is Gestalt?Gestalt theory reinforces the fact the whole of anything is greater than its parts. That is, the attributes of the whole are not deducible from analysis of the parts in isolation. The word Gestalt is utilized in modern German to imply the way a thing has been “placed,” or “put together.” There is no exact equivalent in English.
These principles help us understand how our brain organizes and interprets visual information, and are often used in design to create clear and effective visual layouts.
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An electrical conductor that has very low resistance to current at low temperatures is called a(n) .
An electrical conductor that has very low resistance to current at low temperatures is called a(n) Superconductor.
Superconductors are magnetic, right?A superconductor's hatred of magnetic fields is one of its basic characteristics. A superconductor generates its own equal and opposite magnetic field when a magnetic field is applied by a scientist.
What is the name of a permanent magnet's two poles?A north-seeking pole (north pole) and a south-seeking pole (south pole) are found at either end of every magnet. Depending on how they are arranged, these two oppositely charged poles enable magnets to both repel and attract other magnets.
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A body of mass 3kg is dropped from a tower of height 250m. then its kinetic energy after 3 seconds will be
Answer:The kinetic energy of an object is equal to its mass times the square of its velocity, divided by 2.
Explanation:
Since the body is dropped from a height, it initially has no velocity. As it falls, it will accelerate due to the force of gravity. The acceleration due to gravity is approximately 9.8 m/s^2.
After 3 seconds, the velocity of the body will be 3*9.8 = 29.4 m/s. The kinetic energy of the body will be:
KE = (3 kg) * (29.4 m/s)^2 / 2 = 849.56 J
This is the kinetic energy of the body after 3 seconds of falling.
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What is a way Accenture plans to achieve its sustainability goals by integrating sustainability metrics into all our client engagements?
One way that Accenture is seeking to achieve its sustainability goals is by integrating sustainability metrics into all of its client engagements.
What is sustainability?
Sustainability is the practice of using resources in a manner that meets the economic, social, and environmental needs of the present without compromising the ability of future generations to meet their own needs. It is a systemic approach to creating and maintaining conditions that allow people to thrive in the present without compromising the planet’s ability to support future generations.
This includes leveraging Accenture’s proprietary Sustainability Maturity Model, which provides a structured approach to measure and track sustainability performance. It also includes embedding sustainability into the design of client projects, developing strategies to enable clients to reach their sustainability goals, and exploring the potential of emerging technologies to accelerate progress. Additionally, Accenture is committed to providing its clients with data-driven insights and best practices that enable them to meet their sustainability objectives.
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Diana raises a 1000. N piano a distance (Links to an external site.) of 5.00 m using a set of pulleys. She pulls in 20.0 m of rope. How much work was done on the object
The 5000 N-m work was done on the object.
How is labor done measured?The formula Work = Force * Distance can be used to compute work. The joule (J) or Newton-meter (N-m) is the SI unit for work. When 1 N of force pushes an item a distance of 1 m, the work done is equal to 1 joule.
What kind of work is an example?There are several instances of work being done in our daily lives. A student holding a backpack on his back or his shoulder full of books, a horse pulling a plow across the field, a father pushing a supermarket cart in a mall, and many more examples come to mind.
Given:
Load force = 1000 N
Load distance = 5.00 m
Effort distance = 20.0 m
[tex]Work=Load*Load distance[/tex]
[tex]Work=1000*5.00[/tex]
[tex]Work=5000N-m[/tex]
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The moon Phobos orbits Mars
(mass = 6.42 x 1023 kg) at a distance
of 9.38 x 106 m. What is its period of
orbit?
period of orbit is 2136.63 m/s if The moon Phobos orbits Mars (mass = 6.42x 1023 kg) at a distance of 9.38 x 106 m.
What is the full meaning of distance?noun. the extent or amount of space between two things, points, lines, etc. the state or fact of being apart in space, as of one thing from another; remoteness. a linear extent of space: Seven miles is a distance too great to walk in an hour.
How is distance measured?The SI unit for distance is the meter (m). Short distances may be measured in centimeters (cm), and long distances may be measured in kilometers (km). For example, you might measure the distance from the bottom to the top of a sheet of paper in centimeters and the distance from your house to your school in kilometers.
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