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The sun is shining and a spherical snowball of volume 390 ft3 is melting at a rate of 15 cubic feet per hour. As it melts, it remains spherical. At what rate is the radius changing after 3.5 hours?
A dam holds back water. In the dam is a turbine that produces power with an efficiency of 0.73. what is the velocity of the water leaving the turbine
A setup similar to the one shown in the figure below is often used in hospitals to support and apply a horizontal traction force to an injured leg. (Let m = 6.05 kg and ? = 81.0°.) What is the traction force exerted to the right on the leg?
A 300 kg piano slides 4.50 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
question1a uniform bar of length 46 m and mass 3 kg is attached to a wall with a hinge that exerts a horizontal force
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 655 m/s. What is the horizontal distance between the end of the rifle and the bull's-eye
A spring oscillator is designed with a mass of 0.113 kg. It operates while immersed in a damping fluid, determine the required damping constant for the system
In a steam turbine, steam is flowing at 20kg/s. At the inlet of the turbine, specific enthalpy is 2800kJ/kg, velocity 20m/s and heigh is 2m. Obtain the turbine output power
There is a charge of -3e locked down at a point on a table. 15 meters away, a charge of 3e is released from a scientists hand. What is the potential energy of the charge just as it is released from the scientists hand
The cockroach finds a bread crumb on the rim and, of course, stops. What is an angular speed of the lazy Susan after the cockroach stops.
A 1130kg car and 4020kg truck undergo a perfectly inelastic collision. Find the velocity of the wreckage immediately after the collision
A ray of sunlight is passing from diamond into crown glass; the angle of incidence is 28.10°. Determine the angle between the refracted blue and red rays in the crown glass
A 2-kg block is initially at rest on a horizontal frictionless surface at x = O. What is the maximum kinetic energy of the block between x = 0 and x = 2 m
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