If a sound level increases by 20 dB, the intensity increases by a factor of _______.
a. one thousand
b. one hundred
c. ten
d. ten thousand
Answer: b. one hundred
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A small car and a large truck collide head-on. During the collision, the small car experiences
A) A much larger acceleration than the truck. B) A much larger force than the truck. C) A much larger change in momentum than the truck. D) All of the above. E) None of the above.
Distance is a(n) ______________ quantity
Fill in the blank(s) with correct word
A rectangular coil lies flat on a horizontal surface. A bar magnet is held above the center of the coil with its north pole pointing down. What is the direction of the induced current in the coil?
A) There is no current in the coil. B) clockwise C) counterclockwise D) Not enough information is provided.
A 2000. kg car, traveling to the right at 30. m/s, collides with a brick wall and comes to rest in 0.20 s. The average force the car exerts on the wall is
A) 60. kN. B) 300 kN. C) 600 kN. D) 12. kN. E) 30. kN.