A battery supplies
a. AC current.
b. DC current.
c. resistance.
d. voltage.
e. positive ions.
b, d
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Indicate whether the statement is true or false
Solar energy is quite compatible for a major part of the U.S. because our major energy needs are for ________ energy
a. electrical b. thermal c. kinetic d. potential e. mechanical
Suppose your normal resting heart rate is 60 beats per minute. Now, suppose you board a spaceship that travels away from Earth at 90% of the speed of light. While on the ship, you measure your heart rate. What will it be?
A) It will still be 60 beats per minute. B) It will be 46 beats per minute. C) It will be 74 beats per minute. D) It will be 12 beats per minute.
A 900-kg car traveling east at 15.0 m/s collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together. What is the speed of the wreckage just after the collision?
A) 6.10 m/s B) 12.2 m/s C) 25.0 m/s D) 35.0 m/s E) 17.3 m/s