In addition to the asteroid belt, some meteorites come from the Moon and even Mars
Indicate whether the statement is true or false
TRUE
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A long wire is known to have a radius greater than 4.0 mm and to carry a current uniformly distributed over its cross section. If the magnitude of the magnetic field is 0.285 mT at a point 4.0 mm from the axis of the wire and 0.200 mT at a point 10 mm from the axis, what is the radius of the wire?
a. 4.6 mm b. 7.1 mm c. 5.3 mm d. 12 mm e. 10 mm
A box is dropped onto a conveyor belt moving at 2 m/s. If the coefficient of friction between the box and the belt is 0.3, how long before the box moves without slipping?
A flywheel rotating at 640 rev/min is brought to rest with a uniform deceleration of 2.0 rad/s2. How many revolutions does it make before coming to rest?
A) 320 B) 17 C) 160 D) 360 E) 180
The Mississippi River has a huge delta. With each year and each episode of deposition, the river
A) lengthens its course and the delta shrinks. B) becomes choked and shortens as the delta grows. C) course lengthens and the delta grows. D) shortens as the delta moves upriver.