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Honors Physical Science > Energy > Flashcards

Energy Flashcards

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Biology 101 flashcards
1
Q

Energy is the…

A

ability to do work

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2
Q

What energy is known as the energy of moving objects

A

kinetic energy

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3
Q

What energy is known as stored energy

A

potential energy

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4
Q

energy is measured in…

A

joules

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5
Q

Thermal energy occurs when…

A

the movement of atoms becomes faster resulting in higher temperature.

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6
Q

A piece of bread getting toasted is an example of…

A

energy transfer

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7
Q

A ball starts at the top of the hill meaning it has…

A

only potential energy

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8
Q

As the ball rolls down the hill the ball has…

A

both potential and kinetic energy

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9
Q

Once the ball is at the bottom of the hill but still rolling it has…

A

kinetic energy only

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10
Q

Once the ball stops rolling it has…

A

neither potential nor kinetic energy

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11
Q

How would you calculate kinetic energy?

A

1/2 or 0.5 times mass times velocity /speed squared.

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12
Q

How would you calculate potential energy?

A

mass multiplied by gravitational force times height.

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13
Q

How would you calculate height with given potential/kinetic energy and weight?

A

take the total potential energy and set it equal to the weight times the force of gravity then once you multiply those two values- divide it by potential energy.

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14
Q

The potential energy of a 40-kg cannon ball is 14000 J. How high was the cannon ball to have this much potential energy?

A

35.7m

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15
Q

You are on roller blades on top of a small hill. Your potential energy is equal to 1,000.0 joules. The last time you checked your mass was 60.0 kilograms.

A

588 N

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16
Q

How many Newtons are in each kilogram?

A

9.8

17
Q

How would you find how many newtons are in each kilogram for an equation?

A

multiply the value of kilos by 9.8

18
Q

(point A, a ball rolling down the hill)
(point B, the ball has reached the bottom of the hill but is still rolling)
What transfer is happening between point A and point B

A

Kinetic and potential energy to purely kinetic energy

19
Q

When does an object reach maximum kinetic energy?

A

When in the middle of the pendulum, drop etc.

20
Q

The law of conservation of energy states that…

A

energy cannot be created or destroyed only changed from one state to another.

21
Q

A flashlight uses batteries transforms what type of energy into light energy?

A

chemical

22
Q

when we eat food we take in —– energy that is changed into —–and —– energy as we move.

A

chemical
kinetic/mechanical, thermal

23
Q

An electric fan takes electricity and transforms it into what type of energy?

A

kinetic.

24
Q

What is mechanical energy? think abt what a hydraulic press does

A

Energy that is stored in objects by the application of a force.

25
Q

How would you calculate mechanical energy?

A

potential energy + kinetic energy (E=u+k)

26
Q

What is chemical energy?

A

Energy that is stored in the bonds of molecules and atoms. This is potential energy.

27
Q

What is nuclear energy (NUCLE)?

A

Energy that is STORED in the nucleus of an atom. this holds the nucleus together.

28
Q

What is gravitational energy?
think of an apple in a tree far above the ground.

A

The energy stored in an object due to its height above the earth.

29
Q

How would you calculate gravitational energy? (visualize the definition)

A

weight multiplied by height.

30
Q

A rubber band being stretched is an example of…

A

elastic energy

31
Q

How would you calculate for elastic energy?

A

1/2 multiplied by spring constant times displacement squared.

32
Q

Electrical energy is caused by the…

A

rapid movement of electrons.

33
Q

Radiant/light energy is defined as…

A

electromagnetic energy that travels in transverse waves.

34
Q

Thermal energy is defined as…

A

the internal energy in substances or heat ––that vibration and movement of the atoms and molecules within an object cause.

35
Q

The motion of energy is defined as…

A

the movement of objects from one place to another.

36
Q

Sound energy is defined as..

A

the movement of energy through pressure waves.

Honors Physical Science (9 decks)

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