Test - Unit 7 Energy Flashcards
An example of energy conversion from kinetic to thermal energy would be
Friction
U7 C4 energy
Which picture shows thermal energy transfer by convection
D - water boiling on the stove
U7 C4 energy
Bob used a force of 10 N to pull a 50 kg trunk a distance of 5 m in 2 seconds. Bob’s power is
25 W
U7 C4 energy
Plastic is an example of this
Insulator
U7 C4 energy
When you hold an ice cube, your hand feels cold because
Heat flows from your hand to the ice cube
U7 C4 energy
Conduction is the transfer of heat energy by
Direct particle contact
U7 C4 energy
What energy change do these appliances all have in common
They convert electrical energy to thermal energy
U7 C4 energy
Transfer of energy by the movement of heated particles
Convection
U7 C4 energy
The picture below shows a person swinging a baseball bat, starting at point A. The kinetic energy of the bat would be the greatest at
Mid-swing
U7 C4 energy
The kinetic energy of an object increases as its ___ increases
Velocity
U7 C4 energy
The mechanical energy of a coconut falling for a tree
Remains constant
U7 C4 energy
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?
Some of the potential energy in oil is converted into forms of energy other than electricity
U7 C4 energy
Green plants convert light energy from the sun into ___ during photosynthesis
Chemical potential energy
U7 C4 energy
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:
High to low
U7 C4 energy
A material that resists/limits the flow of heat by conduction, convection, and radiation is a __
Insulator
U7 C4 energy
