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A runaway, 400-kg wagon enters a cornfield with a velocity of 12 m/s and eventually comes to rest. What work was done on the wagon in kJ?
What is the partial pressure of oxygen in humidified air (RH= 100%) at body temp, if the barometric pressure is 750 torr
A space probe is traveling in outer space with a momentum that has a magnitude of 7.80 107 kg · m/s. Determine the momentum of the probe after the retrorocket ceases to fire
A diver of weight 780 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m
Styrofoam has a density of 300 kg/m^3 . What is the maximum mass that can hang without sinking from a 20.0cm -diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere.
An electron moves from point A where the potential is Va=+20.0kV to point B where the potential is Vb=- 40.0 kV. what was the change of the system's electric potential
A transverse sinusoidal wave on a string has a period T = 25.0 ms and travels in the negative x direction with a speed of 30.0 m/s. At t = 0, What is the initial phase angle
A 2.5 mm diameter copper wire carries a current of 33 A, uniformly distributed across its cross-section. Determine the magnetic field at the surface of the wire
If you touch the terminal of a battery, What current will pass through your body if you touch the two terminals of a 9.0 V battery with your two hands
A rifle has a mass of 4.5 kg and it fires a bullet of mass 11.6 g at a muzzle speed of 820 m/s. What is the recoil speed of the rifle as the bullet leaves the gun barrel
Two stationary positive point charges, charge 1 of magnitude 3.80 and charge 2 of magnitude 1.95 , are separated by a distance of 38.0 . An electron is released from rest at the point midway between the two charges.
An unknown nucleus has twice the volume of a nucleus with 83 nucleons. What is the atomic mass number of the unknown nucleus
A 5000 kg helicopter accelerates upward at 0.50 m/s2 while lifting a 2000 kg car. What is the lift force exerted by the air on the rotors? Evaluate the tension in the cable that connects the car to the helicopter?
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