A speedy tortoise can run with a velocity of 10.0 cm/s and a hare can run 20.0 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 minutes. The tortoise wins by a shell (20.0 cm). What was the length of the race?
12.6 m
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The magnetic field of the Earth is believed responsible for which of the following?
a. deflection of both charged and uncharged cosmic rays b. deflection of charged cosmic rays c. ozone in the upper atmosphere d. solar flares
How much electrical charge is needed to raise an isolated metal sphere of radius 1.0 m to a potential of 1.0 × 10^6 V?
A small car has a head-on collision with a large truck. Which of the following statements concerning the magnitude of the average force due to the collision is correct?
A) The truck experiences the greater average force. B) The small car experiences the greater average force. C) The small car and the truck experience the same average force. D) It is impossible to tell since the masses are not given. E) It is impossible to tell since the velocities are not given.
Three resistors of 12 ?, 12 ?, and 6.0 ? are connected together, and an ideal 12-V battery is connected across the combination. What is the current through the battery if they are connected (a) in series or (b) in parallel?
What will be an ideal response?