Physics Energy Review

1200 J of heat are added to a sample of gas while the gas does 400 J of work on the environment. What is the change in internal energy of the gas?

• 800 J

• 1600 J

• -800 J

• -1600 J

Tags

NGSS.MS-PS1-4

What is the work output of a machine that has a heat input of 2,800 Joules and an efficiency of 0.923?

• 2,690J

• 92.3J

• 0.0082J

• 2,584.4

Tags

NGSS.MS-PS3-4

Heat transfer within a fluid takes place by

• Convection

• Conduction

• Radiation

• Sublimation

Tags

NGSS.MS-PS1-4

Convection

• The transfer of thermal energy through liquids and gases

• The transfer of thermal energy through solids

• The transfer of thermal energy as electromagnetic waves

What is the potential energy of a ball, held at a height of 45 m, with a mass of 2-kg.

• U_g= 400 N

• U_g= 600 N

• U_g= 700 N

• U_g= 900 N

What is the equation for spring potential energy?

• U_s= (k)(x)²

• U_s= (k)(x)

• U_s= 1/2(k)(m)

• U_s= 1/2(k)(x)²

Tags

NGSS.MS-PS3-2

A stone is held at a height h above the ground. A second stone with six times the mass of the first stone is also held at height h. the gravitational potential energy of the second stone stone compared to the first one is...

• One-fourth as much

• Twice as much

• Three times as much

• Six times as much

Tags

NGSS.MS-PS3-2

Which of the following objects has the most kinetic energy?

• A 20 kg toddler running at 5 m/s

• A 50 kg toddler running at 30 m/s

• A 90 kg toddler running at 30 m/s

• A 100 kg toddler running at 2 m/s

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Kinetic Energy is defined as

• Energy stored due to its location

• Energy of motion

• Energy stored in the bonds of molecules

• Heat energy

Tags

NGSS.MS-PS3-1

You drop a 5 kg ball from a height of 2 m. Just before it reaches the ground, what type of energy does it have?

• Potential Energy

• Nuclear Energy

• Kinetic Energy

• Chemical Energy