A 1000-kg automobile enters a freeway on-ramp at 20 m/s and accelerates uniformly up to 40 m/s in a time of 10 seconds. How far does the automobile travel during that time?
A) 100 m
B) 200 m
C) 300 m
D) 400 m
E) none of the above
Answer: C
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The coefficient of linear expansion for brass is 19. × 10-6 K-1. What is its coefficient of volume expansion?
A) 5.7 × 10-5 K-1 B) 8 × 10-18 K-1 C) 57. × 10-5 K-1 D) 3.8 × 10-6 K-1 E) 38. × 10-6 K-1
List at least three qualities that would tend to make a type of astronomical object useful as a standard candle
What will be an ideal response?
List at least three qualities that make an astronomical object a good standard candle
What will be an ideal response?
A soccer ball (mass = 0.43 kg) is moving at a speed of 20 m/s when it is kicked with a force of 300 N resulting in it going in the opposite direction with the same speed as before. What is the magnitude of the impulse delivered to the ball?
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