Physics Energy Review

The first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and

• mass

• work done

• force

• pressure

How many Joules of energy are required to change 10 gram of ice at -2 C to water at 20 C?

• 440 J

• 880 J

• 10,140 J

• 66,000 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

At which point is potential energy greatest?

• W

• X

• Y

• Z

Tags

NGSS.MS-PS3-2

The faster an object moves, the ________ kinetic energy it has. 

• more

• less

• none of the above

• same

Tags

NGSS.HS-PS3-2

Which law states that the total energy in a closed system remains constant?

• Law of Conservation of Momentum

• Law of Conservation of Energy

• Newton's First Law of Motion

• Hooke's Law

Gravitational Potential Energy (E_p) is...

• the energy stored in a stretched object

• the energy stored in an electrically charged object

• the energy stored in a frozen object

• the energy stored in a raised object

Tags

NGSS.MS-PS3-2

What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano? Let g = 9.8N/kg

• 5,220,411 J

• 532,695 J

• 73.7 J

• 54,356.6 J

Tags

NGSS.HS-PS2-4

Calculate the kinetic energy of a moving 4 kg object travelling at a velocity of 3 m/s.

• 18 J

• 36 J

• 12 J

• 6 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

2nd law of thermodynamics

• Every time energy changes form, some of it is lost to the environment

• Energy can't be created or destroyed

• All energy generates heat

Tags

NGSS.HS-PS3-4

Specific Heat

• the amount of energy it takes to raise one gram of a substance by one degree Celsius

• The internal energy of an object

• The measure of the kinetic energy of an object's molecules