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Physics > Chap 13 Test > Flashcards

Chap 13 Test Flashcards

1
Q

What is the most concentrated form of engergy

A

Nuclear energy

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2
Q

Energy is measured in

A

Joules

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3
Q

Which of the five forms of energy is defined as the amount of motion atoms have

A

Heat

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4
Q

A system in which energy and matter are exchanged with the surroundings is considered to be what type of system

A

Open

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5
Q

Formula for gpe

A

Weight x height

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6
Q

Some energy is always lost when using machines but the percentage of energy actually used to accomplish the job is called

A

Efficiency

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7
Q

The point at which a lever rests is called its

A

Fulcrum

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8
Q

Unit used for force

A

Newton

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9
Q

One joule equals

A

One n(m)

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10
Q

Two inclined planes that are used to push two things apart are called

A

Wedge

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11
Q

equation for work

A

Work =force x distance

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12
Q

Equation for power

A

Power = work/time

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13
Q

Distance and force are ____for machines

A

Inversely related

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14
Q

The ratio between the output force and the input force.

A

Mechanical advantage

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15
Q

A hard bar used for moving things. It has an effort force, a fulcrum. And a load

A

Lever

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16
Q

A bar with an inclined plane wrapped around it

A

Screw

17
Q

Rope over a grooved wheel

A

Pulley

18
Q

Multiple pulleys are called

A

Block and tackle

19
Q

Used for moving things to a higher place without having to lift them.

A

Inclined plane

20
Q

A machine that combines two or more simple machines

A

Compound machine

21
Q

The ability to do work

A

Energy

22
Q

Energy of position. Anything stretched or compressed

A

Potential energy

23
Q

Potential energy due to the pull of gravity on objects

A

Gravitation potential energy

24
Q

The energy an object has because it is moving.

A

Kinetic energy

25
Q

Formula for kinetic energy

A

K.e. = m(v) squared /2

26
Q

The form of energy that is in motion

A

Mechanical energy

27
Q

Energy that can be released if chemical bonds are broken

A

Chemical. (Fire, digestion)

28
Q

The internal motion or movement of atoms

A

Heat

29
Q

Moving electrical charges that have the ability to do work.

A

Electromagnetic. (Electricity, light, xrays, radio waves)

30
Q

When the nucleus of an atom splits and energy is released.

A

Nuclear. (Nuclear fission, atomic bomb)

31
Q

A measure of how much useful work a machine can do

A

Efficiency

32
Q

Equation for efficiency

A

Efficiency = useful work output/ work input

Physics (3 decks)

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