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Two balls hit in an elastic collision. Both balls initially have the same speed but opposite directions (before the collision), and one ball is 2 times more massive than the other. What is the velocity of both balls after they collide?
current passes through a solution of sodium chloride. in 1.00 second 2.68 x 1016 na ions arrive at the negative
three equal point charges each with charge 1.80 muc are placed at the vertices of an equilateral triangle whose sides
A father (m = 70 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast will the father be moving.
A 38.0 mH inductor has a reactance of 1.90 k. What is the frequency of the ac current that passes through the inductor
A high-speed lifting mechanism supports a 845-kg object with a steel cable that is 40.0 m long and 4.00 cm2 in cross-sectional area. (a) Determine the elongation of the cable. mm
A 5.6cm diameter horizontal pipe gradually narrows to 2.9cm. When water flows through this pipe at a certain rate, What is the volume rate of flow
An ultrasonic transducer, of the type used in medical ultrasound imaging, is a very thin disk (m = 0.14 g) driven back and forth in SHM at 1.1 MHz by an electromagnetic coil.
A diving board of length 3.00m is supported at a point 1m from the end, and a diver weighing 520 m stands at the free end . The diving board is of uniform cross section and weighs 270m.
A satellite has a mass of 110 kg and is located at 1.96 106 m above the surface of Earth, What is the magnitude of the gravitational force on the satellite
A "door closer" is attached to the door and the top of the door frame.When the door is open and at rest, the door closer exerts a torque of 4.8 {rm N} cdot {rm m}. What is the least force that you need to apply to the door to hold it open.
Suppose that two objects attract each other with a gravitational force of 16 units. If the distance between the two objects is doubled, what is the new force of attraction between the two objects
A brick is initially 10.56 cm high and an aluminum can is initially 10.57 cm high. By how much must their temperatures be raised in order for the brick
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