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Two point charges of equal magnitude are 7.3cm apart. At the midpoint of the line connecting them, their combined electric field has a magnitude of 40N/C . Find the magnitude of the charges.
A 1.0 kohm resistor is connected in series with a 10 mH inductor, a 30 V battery, and an open switch. at time t=0, the switch is suddenly closed. What are the voltage drops Vr and Vl 20.00 us after the switch is closed.
A spring has a force constant of 323 N/m and an unstretched length of 6 cm. One end is attached to a post that is free to rotate in the center of a smooth table, as shown in the top view below. The other end is attached to a 4-kg disk moving in un..
An 8-kg ball hanging from the ceiling by a light wire 135cm long is struck in an elastic collision by a 2 kg ball moving horizontally at 5.00 m/s just before the collision. Find the tension in the wire just after collision.
This situation is like that of a car on a curve that is banked at an angle of 21.50°. If she tries to make the turn without slowing down, what is the minimum distance from the seawall that she can begin making her turn and still keep away from a c..
An automobile tire is rated to last for 40,000 miles. To an order of magnitude, through how many revolutions will it turn?
A 1000-kg car travelling at a speed of 32 m/s skids to a halt on wet concrete where f_k = 0.3. How long are the skid marks.
A ball is thrown directly up from the ground with speed vsub0. At the same time, a second ball is dropped from rest from a height H, straight above the point where the first ball was thrown upward. There is no air resistance. A) Find out the time at ..
You are driving to the grocery store at 24 m/s. You are 115 m from an intersection when the traffic light turns red. Suppose that your reaction time is 0.50 s and that your car brakes with constant acceleration. How far are you from the intersecti..
A 3.2 mass attached to a spring with a spring constant of 114 is oscillating in a vat of oil, which damps the oscillations. If the damping constant of the oil is 10kg/s, how long would it take the amplitude of the oscillations to decrease to 1.0% ..
The emissivity of her skin is 0.750 and its surface area is 1.30 m2. How much time would it take for her to emit a net radiant energy from her body that is equal to energy contained in this dessert.
The sensor in the torso of a crash-test dummy records the magnitude and direction of the net force acting on the dummy. If the dummy is thrown forward with a force of 570N while simultaneously being hit from the side with a force of 2400-N, what f..
blocks are lined up in a row on a frictionless table. How much force does the 8.0 block exert on the 7 block.
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