Unit Test — Unit test Answers
25 verified answers3 views
21
Free Preview
A powered winch is used to pull a sailboat to shore. The winch uses a 900 W motor.If the motor is used for 30 s, how much work does it do? (Power: P = W/t)
A
0.03 JB
30 JC
960 JD
27,000 J22
Free Preview
A sled is at rest at the top of a slope 2 m high. The sled has a mass of 45 kg. What is the sled’s potential energy? (Formula: PE = mgh)
A
90 JB
56.8 JC
441 JD
882 J23
Plants are responsible for a very important energy transformation, as shown.
A
radiant to chemicalB
nuclear to mechanicalC
chemical to thermalD
mechanical to chemical24
What happens in terms of energy when a moving car hits a parked car, causing the parked car to move?
A
The moving car transfers kinetic energy to the parked car.B
Kinetic energy in the moving car disappears.C
Kinetic energy in the parked car is created.D
The parked car transfers kinetic energy to the moving car.25
How do fission nuclear reactions differ from fusion nuclear reactions?
A
Fission reactions involve the conversion of matter into energy, but fusion reactions do not.B
Fusion reactions involve the conversion of matter into energy, but fission reactions do not.C
Fission reactions are used to generate electricity for consumers, but fusion reactions are not.D
Fusion reactions are used to generate electricity for consumers, but fission reactions are not.Did you find these answers helpful?
Verified answers available
TRY EDGENUITY HACKS
- Auto Complete Exams
- Auto Complete Assignments
- Skip Videos Instantly
50,000+ students using this