Unit Test — Unit test Answers
0 verified answers
21
Free Preview
Kinetic energy and mass are proportional.
Answer not available
22
Free Preview
Which best describes how energy changes form in a car’s engine?
A
A single transformation occurs because the chemical energy of the fuel is changed to the mechanical energy of the car.B
A single transformation occurs because the mechanical energy of the car originates from one spark.C
Multiple transformations occur because the chemical energy of the fuel is changed to several forms of energy.D
Multiple transformations occur because the chemical energy of the fuel must be replenished to keep the car running.23
Efficiency is the ratio of output work to input work, expressed as a percentage. Light bulbs put out less light energy than the amount of electrical energy that is put into the bulb.
A
10%B
80%C
90%D
100%24
Which describes how the spring constant affects the potential energy of an object for a given displacement from an equilibrium position?
A
The higher the spring constant, the greater the gravitational potential energy.B
The lower the spring constant, the greater the gravitational potential energy.C
The higher the spring constant, the greater the elastic potential energy.D
The lower the spring constant, the greater the elastic potential energy.25
Natalia lifts a bag of groceries 0.50 m by exerting a force of 36 N. How much work did she do on the bag?
A
0 JB
18 JC
36 JD
72 JDid you find these answers helpful?
More from this Course
Verified answers available
TRY EDGENUITY HACKS
- Auto Complete Exams
- Auto Complete Assignments
- Skip Videos Instantly
50,000+ students using this