U7 Energy Flashcards
1
Q
- The amount of heat needed to raise the temperature of 1kg of a material by 1°C
A
Specific heat
U7C3
2
Q
- Where would this roller coaster have the greatest kinetic energy?
A
After the hill
U7C1
3
Q
- When oil is burned to produce electricity, the electrical energy produced is less than the potential energy in the oil. Which best explains this observation?
A
Some of the potential energy in oil is converted into forms of energy other than electricity.
U7C1
4
Q
- What is the potential energy of a 55kg box that is sitting 8.0m above the ground?
A
4,312 J
U7C1
5
Q
- When an object is dropped what happens to potential and kinetic energy as it falls?
A
GPE goes down, KE goes up
U7C1
6
Q
- The pic below shows a person swinging a baseball bat, starting at point A. The GPE of the bat would be greatest at…
A
The top of the bat before he swings
U7C1
7
Q
- The pic below shows a person swinging a baseball bat, starting at point A. The kinetic energy of the bat would be greatest at…
A
The middle of where he’s swinging
U7C1
8
Q
- Conduction is the transfer of heat energy by
A
Direct particle contact
U7C3
9
Q
- Green plants convert light energy from the sun into ____ during photosynthesis
A
Chemical potential energy
U7C1
10
Q
- Which picture shows the same type of thermal energy transfer?
A
The pan and the iron
U7C3
11
Q
- The diagram to the right shows four locations in a temperature field. The temperature of each location is given in degrees Celsius. Heat energy will normally flow from:
A
34°c to 20°c (High to low)
U7C3
12
Q
- Temperature measures the average _____ of the particles in a material
A
Kinetic energy
U7C3
13
Q
- Through which of the following will convection most likely occur?
A
Liquids and gases
U7C3
14
Q
- The mechanical energy of a coconut falling from a tree___
A
Remains constant
U7C1
15
Q
- The ____ energy of an object increases with its height.
A
Gravitational potential
U7C1
