PHYSICS HIGH SCHOOL

Does potential energy increase with temperature?

Answers

Answer 1
Answer: When a solid melts and becomes a liquid, we say it changes phase from a solid to a liquid. In this change, the bonding between the atoms or molecules changes. You have to "break" some bonds to go from a solid to a liquid. This requires energy. The liquid is a "higher" potential energy state than the solid, even at the same temperature. (It is slightly more complicated than this, but this is good enough for this class.) To convert 1kg of solid water at 0oC (273K) to liquid water at 0oC (273K) requires about 330,000J of energy. Note that the temperature of the liquid is the same as the solid’s, i.e. you added heat without changing the temperature, instead the phase changed. The heat added went into "breaking" bonds and increasing its potential energy, not into increasing the average translational KE of the molecules. (It is slightly more complicated than this, but this explanation is good enough for this class.) If you go the other way, and convert 1kg of liquid water at 0oC (273K) to ice at 0oC (273K) releases 330,000J of heat. This heat comes from the energy given off when bonds form, i.e. it goes to a state of lower potential energy. The same type of thing occurs when a liquid changes to a gas. Then more bonds are broken as the molecules move apart, and it requires energy to break the bonds and move to a higher potential energy. To convert 1kg of liquid water at 100oC (373K) to 1kg of water vapor at 100oC (373K) requires 2,260,000J (almost 2.3 million Joules) of energy. That is, the water absorbs energy to change from a liquid to a gas.. If 1kg of water vapor conde
Answer 2
Answer: -- The potential energy of a 12-lb bowling ball up on the shelf
doesn't have anything to do with the temperature of the ball or
the shelf.

-- The potential energy of a jar full of gas does depend on the
temperature of the gas.  The warmer it is, the greater its pressure
is, and the more work it can do if you let it out through a little hole
in the jar.  If it gets hot enough, it'll have enough potential energy
to blow the jar to smithereens.

Related Questions

MIDDLE SCHOOL

Choose the word from the drop-down menu that completes each sentence. A/An__star system is made of two stars.

A/An__star system is made of no more than a few thousand stars.

A/An__star system is made of more than a million stars.

Answers

Answer:

A binary star system is made of two stars.

An open cluster star system is made of no more than a few thousand stars.

A globular cluster star system is made of more than a million stars.

Explanation:

A binary star system is made of two stars.

A binary Star is a system formed by two gravitationally linked stars, so that they are found spinning around each other (in reality they revolve around a common center of gravity). Binary stars can be very far apart or very close. Sometimes they can exchange material.

An open cluster star system is made of no more than a few thousand stars.

Star clusters are clusters of stars that are held together by gravitational effects. All stars belonging to the same cluster have a very similar age. The stars of an open cluster are gravitationally linked to each other, but end up dispersing as they undergo close encounters with other clusters, the interstellar medium, or by interactions between their own stars. Its structure is random and, in general, asymmetric. They are normally made up of young stars with ages of just one million years. They are usually made up of several hundred or thousands of stars.

A globular cluster star system is made of more than a million stars.

A globular cluster is a set of hundreds of thousands of gravitationally bound stars. Unlike open clusters, these are much denser (and massive) and their stars exert a much more intense gravitational attraction to each other. They usually contain very old stars. The globular clusters form a halo around our galaxy, the Milky Way, while the open ones are placed in the arms of the spiral. Due to their large number of stars, sometimes in a globular cluster it is difficult to distinguish individual stars.

Answer:

A/An binary star system is made of two stars.

A/An open cluster star system is made of no more than a few thousand stars.

A/An global cluster star system is made of more than a million stars.

good luck!

COLLEGE

The heavyweight boxing champion of the world punches a sheet of paper in midair, bringing it from rest up to a speed of 26.5 m/s in 0.044 as . The mass of the paper is 0.003 kg. Part A Find the force of the punch on the paper.

Answers

corrected question:The heavyweight boxing champion of the world punches a sheet of paper in midair, bringing it from rest up to a speed of 26.5 m/s in 0.044 s . The mass of the paper is 0.003 kg. Part A Find the force of the punch on the paper

Answer:

Force=1.8N

Explanation:

Newtons third law states that in every action there is equal and opposite reaction.

The force of the punch will be the force that moves the paper by a speed of 26.5m/s.

m=0.003kg , v=26.5m/s  u=0(the paper is punched from rest) t=0.044s

F=1.8N

MIDDLE SCHOOL

All objects in motion have what energy

Answers

Hello  Undeadman12

All objects in motion would have kinetic energy

:)

Hi there.

Your Question: All objects in motion have what energy ?

Kinetic Energy is the answer,  (I took this part from google) Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position).

I hope this helps, if it does, please consider marking me brainiest!

HIGH SCHOOL

To apply the law of conservation of energy to an object launched upward in the gravitational field of the earth. In the absence of nonconservative forces such as friction and air resistance, the total mechanical energy in a closed system is conserved. This is one particular case of the law of conservation of energy. In this problem, you will apply the law of conservation of energy to different objects launched from the earth. The energy transformations that take place involve the object's kinetic energy K=(1/2)mv2 and its gravitational potential energy U=mgh. The law of conservation of energy for such cases implies that the sum of the object's kinetic energy and potential energy does not change with time. This idea can be expressed by the equation Ki+Ui=Kf+Uf , where "i" denotes the "initial" moment and "f" denotes the "final" moment. Since any two moments will work, the choice of the moments to consider is, technically, up to you. That choice, though, is usually suggested by the question posed in the problem. Using conservation of energy, find the maximum height h_max to which the object will rise

Answers

Answer:

Explanation:

In absence of non-conservative forces, the mechanical energy of the object (sum of kinetic energy) is conserved:

where:

is the initial kinetic energy of the object, with mass m and launched with speed v upward

is the initial potential energy of the object, which is zero since the object is launched from the ground

is the kinetic energy of the object when it reaches its maximum height, and it is zero because at maximum height the speed is zero: v = 0

is the potential energy of the object at maximum height h, with g being the acceleration due to gravity

Therefore, the previous equation becomes

and by re-arranging it we find an expression for the maximum height:

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