Suppose you throw an apple horizontally. Neglecting air resistance, just after you release the apple from your hand, the net force on the apple is
A) zero.
B) directed horizontally forward.
C) directed horizontally backward.
D) directed downward.
E) directed upward.
D
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Most recent studies suggest that the Sun is about _____ from the center of our Galaxy
A) 10.3 kiloparsecs B) 8.2 kiloparsecs C) 9.4 kiloparsecs D) 11.1 kiloparsecs
A 4.0-pC point charge is placed at the center of a hollow (inner radius = 2.0 cm, outer radius = 4.0 cm) conducting sphere which has a net charge of 4.0 pC. Determine the magnitude of the electric field at a point which is 6.0 cm from the point charge
a. 35 N/C b. 25 N/C c. 30 N/C d. 20 N/C e. 10 N/C
Slow surface evolution is caused by
a. wind erosion. b. plate tectonics. c. differentiation. d. all of the above e. a and b
A turntable has a moment of inertia of 3.0 × 10^?2 kg·m2 and spins freely on a frictionless bearing at 25 rev/min. A 0.60-kg ball of putty is dropped vertically on the turntable and sticks at a point 0.10 m from the center. By what factor does the kinetic energy of the system change after the putty is dropped onto the turntable?
a. 0.91 b. 1.0 c. 0.83 d. 1.5