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Suppose the surfae a circular space station is rotating at35.8m/s. What must be the value of the radius for the astronauts to weigh one half their weight on earth? When theradius is1700m the weight is equall to that on earth.
A device to measure the density of a liquid is made of solid plastic with uniform density and has the shape of a sphere with an attached cylinder. The mass of the device is M = 27 g, the volume of the sphere is Vs = 25 cm3, the length of the cylin..
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?
You are standing on a scale inside an elevator. The scale reads exactly your weight. What could be the velocity of the elevator, What is the acceleration of the elevator
A 5 kg toy race car can move along an x axis. It gives Fx of the force acting on the car, that begins at rest at time t = 0. (The vertical axis is marked in increments of 2.5 N.) what is the momentum at t=6?
Design a spring that will give a 1140kg satellite a speed of 2.20m/s relative to an orbiting space shuttle. Your spring is to give the satellite a maximum acceleration of 5.00g. The spring's mass, the recoil kinetic energy of the shuttle, and ..
An object weighs 302 N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 220 N. When it is immersed in oil, it weighs 257 N. what is the density of the object.
During a solar eclipse, the moon, earth and sun all lie on thesame line with the moon between earth and the sun, what force isexerted by the sun on the moon
An automobile transmission has 175 hp of power entering from the engine, 167 hp leaving to the wheels, while losing 5000 Btu/hr to the surroundings as heat.
A 79 kg pole-vaulter falls from rest from a height of 4.6 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.30 s after landing on the pad. compute the athlete's velocity just before reaching the pad.
Two stationary positive point charges, charge 1 of magnitude 3.45 nC and charge 2 of magnitude 1.50 nC, are separated by a distance of 52 cm. An electron is released from rest at the point midway between the two charges, and it moves along the lin..
A catapult launches a test rocket vertically upward from a well, giving the rocket an initial speed of 81.0 m/s at ground level. What is its maximum altitude
Consider a circuit with a main wire that branches into twoother wires. If the current is 10 amperes in the main wire and 4amperes in one of the branches, how much current is in the other branch
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