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1. While an object near the earth's surface is in free fall, its
a) velocity increases.
b) acceleration increases.
c) mass increases.
d) mass decreases.
2. Vector A points north and vector B points east. If C =B - A, then vector C points:
a) south of east
b) north of west
c) south of west
d) north of east
In a series circuit, a generator (1423 Hz, 16.3 V) is connected to a 16.2-O resistor, a 4.13-µF capacitor, and a 4.92-mH inductor. Find the voltage across each circuit element
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 25.7° above the horizontal, What is the magnitude of the net torque exerted on the branch by the children
Light hits the surface of water at an incident angle of 19° with respect to the normal line. What is the angle between the reflected ray and the refracted ray
Transverse waves travel with a speed of 18 m/s in a string under tension of 5 N. What tension is required for a wave speed of 27 m/s in the same string.
A ball is thrown horizontally from the top of a 85 m building and lands 140 m from the base of the building. What is the vertical component of the velocity just before the ball hits the ground in m/s
n 1730 kg car stopped at a traffic light is struck from the rear by a 865 kg car. The two cars become entangled, what is the change in kinetic energy
a 10 kg box is pushed along a frictionless horizontal surface by a horizontal force of 50n. if the box starts from rest
a 2.50 a current is carried by a copper wire of radius 1.0 mm. if the density of conduction electrons is 8.0e28m3 what
what is the maximum weight of the crate that the system can support? What is the angle needed for equilibrium.
You run a microwave for 6 minutes together with a 1500 W boom-box and a 2800 W space heater. What is the power of your microwave
1 using what you know about electricity hypothesize about how series resistors would affect current flow. what would
we drop a cube of ice into a glass of water. the mass of the cube of ice is 45.8 g and its initial temperature is -10.2
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