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STUFF > Ch.15 Physics > Flashcards

Ch.15 Physics Flashcards

1
Q

What is the energy of motion?

A

Kinetic energy

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2
Q

What is the formula of an object’s kinetic energy?

A

KE=1/2m•v squared

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3
Q

What is potential energy?

A

Energy stored in an object as a result if a position or shape

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4
Q

What does GPE depend on?

A

Height and mass

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5
Q

What is elastic potential energy?

A

The energy of an object that is stretched or compressed

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6
Q

What are the six forms of energy?

A

Mechanical, chemical, electrical, thermal, nuclear, and electromagnetic

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7
Q

Explain the energy conversions of the seagulls’ method to eat an oyster

A

Gull lifted oyster increasing it’s GPE, gull drops the oyster increasing it kinetic energy, oyster hits rocks gaining thermal energy and losing any GPE or kinetic

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8
Q

What is the law of conservation of energy?

A

Energy cannot be created or destroyed

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9
Q

What is thermal energy?

A

The motion of microscopic particles in matter and the slowing of an object because of friction

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10
Q

As an object falls what happens?

A

GPE is concerted into kinetic energy

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11
Q

At what point during a pole-vaulter’s jump is his GPE the greatest?

A

At the highest point

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12
Q

What does Einstein’s equation imply about mass and energy?

A

Mass and energy are equal and can be converted into each other

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13
Q

Does Einstein’s equation E=mc squared suggest that mass and energy together are conserved?

A

Yes

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14
Q

What is a nonrenewable energy source?

A

Energy that cannot be replaced once it’s gone

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15
Q

What are the four nonrenewable energy sources?

A

Oil,gas,uranium,and coal

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16
Q

What are the advantages and disadvantages to using fossil fuels as energy sources?

A

Advantages-cheap,readily available(abundant in supply)

Disadvantage-pollution

17
Q

What is a renewable energy source?

A

Energy source that can be replaced in a short amount of time

18
Q

What happens in hydroelectric power?

A

GPE from the water begin the dam is converted into KE when flowing down

19
Q

What are the six renewable energy sources?

A

Hydroelectric, solar, geothermal, wind, biomass, nuclear fusion

20
Q

What happens what do hydrogen fuel cells do when they combine hydrogen and oxygen?

A

They generate

21
Q

What are two ways energy resource can be reserved?

A

Use less and increase its efficiency

22
Q

What does atomic fission and fuel produce?

A

Nuclear energy

23
Q

How do you recognize energy?

A

By looking at the changes it cause such as motion and sound

24
Q

What are fossil fuels?

A

Remains of once living organisms found underground

25
Q

What is the energy stored on wood?

A

Biomass energy

26
Q

What is energy?

A

Ability to do work

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