Electricity from a wall plug costs the consumer about
A. 1 ¢ per kilowatt-hour
B. 10¢ per kilowatt-hour
C. $1 per kilowatt-hour
D. $1000 per kilowatt-hour
Answer: B. 10¢ per kilowatt-hour
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A 5.00 gram bullet has a velocity of 300 m/s. It strikes a block of wood and penetrates to a distance of 2.00 cm. The average force of the block of wood on the bullet is
A. 9,340 N. B. 11,250 N. C. 15,200 N. D. 19,500 N. E. 21,400 N.
What is the stored energy in a 0.50-mH coil carrying a current of 5.0 A?
a. 1.3E–2 J b. 6.3E–3 J c. 2.5E–3 J d. 2.5E–2 J e. 1.0E–2 J
A car is traveling at 26.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with constant acceleration. The car comes to a stop in a distance of 120 m. How fast was the car moving when it was 60
0 m past the point where the brakes were applied? A) 22.5 m/s B) 18.4 m/s C) 15.0 m/s D) 12.1 m/s E) 9.20 m/s
State Newton's second law of motion in terms of momentum
What will be an ideal response?