SEA-Tech PSc Energy Review

1. Which type of energy can move through space as a wave?

• Chemical

• Electromagnetic

• Nuclear

• Thermal

Water has a specific heat of 4.184 J/gºC.  If a 100ml bottle of water increases in temperature from 75 degrees Celsius to 100 degrees Celsius . What is it' change in energy?

• 10.46J

• 9.48J

• 10,460J

• 9,480J

1. Which of the following sentences best describes energy?

• 1. Energy is what is trapped inside the nucleus of every atom.

• 1. Energy is produced by photosynthesizing plants and is lost once the plants are eaten.

• 1. Energy can take many forms but it always has the to do work.

• 1. Energy is created by moving objects higher off the ground.

1. When a rocket ship takes off the following energy conversion takes place:

• 1. Rocket energy turns into space energy.

• 1. Mechanical energy turns into chemical energy.

• 1. Nuclear energy turns into electromagnetic energy.

• 1. Chemical energy turns into mechanical energy.

Which of the following statements is true about the Law of Conservation of Energy?

• ·       Energy can not be created or destroyed

• ·       Energy can be destroyed but not created

• ·       Energy can be created but not destroyed

• ·       Energy can be destroyed

1. In the diagram above, where is the kinetic energy of the car the highest?

• 1

• 2

• 3

• 4

 

1. In the diagram above, where is the potential energy of the car the highest?

• 1

• 2

• 3

• 4

1. Which has the most kinetic energy?

• 1. A 270 kg gorilla running at 5 m/s

• 1. A 500 kg car driving at 5 m/s

• 1. A 25 kg badger running to scratch your face off at 5 m/s

• 1. A 500 kg car driving at 10 m/s

Truck one is speeding down the freeway.  Another identical truck (truck two) has been heavily loaded so it had twice the total mass of truck one. Both trucks are moving at the same velocity. What is true about the Kinetic energy of the second truck?

• Truck two has half the KE

• Truck two has twice the KE

• Truck two has 4 times the KE

• Truck two has the same KE

1. An object is 5 meters from the ground. What pieces of information do you need to determine the object’s potential energy?

• The object’s velocity and mass.

• The object’s mass and kinetic energy.

• The acceleration of gravity and the object’s velocity.

• The object’s mass and the acceleration of gravity.