You press a stick that has a varying cross-sectional area horizontally between the palms of your hands. The area of the stick pushing against your left palm is twice the area of the stick pushing against your right palm.The force on your left palm is __________ the force on your right palm
a. 1/4
b. 1/2
c. equal to
d. 2 times
e. 4 times
c
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A 3.00-kg stone is dropped from a 39.2 m high building. When the stone has fallen 19.6 m, the magnitude of the impulse the Earth has received from the gravitational force exerted by the stone is
a. 9.80 N s. b. 19.6 N s. c. 29.4 N s. d. 58.8 N s. e. 118 N s.
A 12.0-kg mass is placed on a 25.0° incline and friction keeps it from sliding. The coefficient of static friction in this case is 0.580 and the coefficient of sliding friction is 0.520 . The mass is given a shove causing it to slide down the incline. Taking down the incline as positive, what is the acceleration of the mass while it is sliding?
a. -1.99 m/s2 c. -0.477 m/s2 b. 1.99 m/s2 d. 0.477 m/s2
A solar eclipse can occur:
A) only during a full Moon B) only during a new Moon C) during any phase of the Moon D) only during a quarter Moon E) during a new Moon or a full Moon
A series LC circuit contains a 100 mH inductor, a 36.0 mF capacitor and a 12 V battery. The frequency of the electromagnetic oscillations in the circuit is
a. 5.73 × 10^?4 Hz. b. 9.55 × 10^?3 Hz. c. 0.442 Hz. d. 2.65 Hz. e. 44.0 Hz.