Test- U7 Energy Flashcards
Thermal energy is transferred to the solar panel in picture B by
Convection
U7 C3 pg 19
A material that resists/limits the flow of heat by conduction, convection, and radiation is a(n) ____.
insulator
U7 C3 pg 19
Through which of the following will convection most likely occur?
liquids and gases
U7 C3 pg19
When water at 10°C is heated to 20° C its kinetic energy
increases
U7 C3 pg 19
Which pictures show the same type of thermal energy transfer?
Stove and iron
U7 C3 pg 19
When you hold an ice cube, your hand feels cold because
heat flows from your hand to the ice cube.
U7 C3 pg 19
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
35 degrees to 20 degrees
U7 C3 pg 19
Where would this roller coaster have the greatest kinetic energy?
after the drop at the lowest point
U7 C1 pg 3
As the time required to do a given amount of work decreases, the power developed
increases
U7 C4 pg 24
How much force is required to lift a rock a vertical distance of 8 m if 80 J of work were done?
F=? W= 80J d= 8J W=Fd /d=/d F=W/d F=80/8 F= 10N U7 C4 pg 26
This roller coaster car starts from rest and moves along the track. At what point does the roller coaster car have the greatest potential energy?
At the highest point
U7 C1 pg 3
The kinetic energy of an object increases as its ______ increases.
velocity
U7 C1 pg 2
Temperature measures the average ____ of the particles in a material.
mechanical energy
U7 C2 pg 11
A constant force of 2.0 N is used to push a 3.0 kg box 4.0 m across the floor. How much work is done?
W=Fd W=? F= 2N d=4 m W=2(4) W= 8 J U7 C4 pg 26
The mechanical energy of a coconut falling from a tree ____.
remains constant
U7 C2 pg 11
