Planet A has twice the mass of Planet B. From this information, what can we conclude about the escape speed for Planet A compared to that of Planet B?
A) The escape speed for Planet A must be twice as great as the escape speed from Planet B.
B) The escape speed for Planet A must be four times as great as the escape speed from Planet B.
C) The escape speed for Planet A is the same as the escape speed from Planet B.
D) The escape speed for Planet A is greater than the escape speed from Planet B, but we cannot say how much greater.
E) We cannot conclude anything about the escape speed for Planet A without knowing the radii of the two planets.
E
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What is the global positioning system (GPS)?
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What will be an ideal response?
A planar loop consisting of four turns of wire, each of which encloses 200 cm2, is oriented perpendicularly to a magnetic field that increases uniformly in magnitude from 10 mT to 25 mT in a time of 5.0 ms. What is the resulting induced current in the coil if the resistance of the coil is 5.0 W?
a. 60 mA b. 12 mA c. 0.24 mA d. 48 mA e. 6.0 mA
Suppose that we wish to find the "net force" on an automobile, in order to apply Newton's law of motion to the motion of the automobile
As part of the net force, do we need to include "internal frictional forces" due to internal gears, bearings, etc.? A) Yes, because of Newton's law of force pairs. B) No, because only external forces need to be included. C) Yes, because every internal and external force must be included. D) No, because only the drive force needs to be included. E) Yes, because these forces dissipate some of the car's energy.