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You throw a superball so that it bounces off the floor, then off the underside of a table, then off the floor again. What must the initial relation between Vx and Rw be so that the ball returns to your hand with the outward and return paths the same?
A ball is dropped from rest from the top of a building and hits the ground with a speed of v. From ground level a second ball isthrown upwards with the same speed at the same instant the ball at the top is dropped.
A jet with mass m = 50000.0 kg jet accelerates down the runway for takeoff at 1.7 m/s2. What is the net horizontal force on the airplane as it levels off
A 300 kg elevator is being pulled upwards by a steel cable at a constant velocity. What is the net force on the elevator
A steel piano wire (Y = 2.0 x 10^11 Pa) has a diameter of 0.80 mm.One end is fixed in place and the other end is wrapped around atuning pin of diameter 8.0 mm. The length of the wire (notincluding the wire wrapped around the tuning pin) is 66 cm.
a jogger runs in a straight line with an average velocity of 5.1ms for 2.1 min and then with an average velocity of 4.9
To recharge a 10 V battery, a battery charger must move 3.7 105 C of charge from the negative terminal to the positive terminal. How much work is done by the charger
A muon particle ( q=-e, m=207me) is traveling at a speed v=4.2*10^7 m/s, What is the radius of its path in the magnetic field
A 5.4-µC point charge is located at x = 0.9 m, y = 3.3 m, and a -3.9-µC point charge is located at x = 1.9 m, y = -1.9 m. (a) Find the magnitude and direction of the electric field at x = -3.2 m, y = 0.9 m.' (b) Find the magnitude and direction of..
A circular coil enclosing an area of 200 cm2 is made of 210 turns of copper wire. The wire making up the coil has resistance of 3.0 ?, what is the average current in the coil during that time
The critical density of the universe is 5.80×10^?27 kg/m^3. Assuming that the universe is all hydrogen, express the critical density in the number of H atoms per cubic meter.
An electric motor under steady load draws 9.7 amperes at 110 volts; it delivers 0.93 kW of mechanical energy. The temperature of the surroundings is 300 K. What is the total rate of entropy generation Sg? What is its origin?
How does the decrease in gravitational potential energy of a falling ball compare to its increase in kinetic energy.
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