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An elevator can lift a 107 N aircraft a distance of 26 meters in 11 s. What is the power output of the elevator?
When a liquid and its vapor are in equilibrium, the rates of evaporation of the liquid and condensation of the vapor are equal. Compute the rate of evaporation of mercury into a vacuum
A set of 20 stairs, each of 20-cm height, is ascended by a 700 N man in a period of 1.25 s. Compute the mechanical work, power, and change in potential energy all through the ascent. I have 2800J. Where do I go from here.
A space probe is launched from Earth, headed for deep space. At a distance of 15,000 miles from the Earth's center, What is the size of the force when it is at 30,000 miles from the Earth's center
A cannon tilted up at a 26 degree angle fires a cannon ball at 71m/s from atop a 12m -high fortress wall
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 530nm, What is the work function of this material
The maximum speed of a 2.5-kg mass attached to a spring is 0.55 m/s, and the maximum force exerted on the mass is 11 N. What is the amplitude of motion for this mass
To explain why he seems to hang in the air, compute the ratio of the time he is above ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore air resistance.
A 30 N block is pulled along a horizontal surface by a 10 N force parallel to the surface. evaluate the coeffient of kinetic friction
A large tank is filled with methane gas at a concentration of 0.690 kg/m3. What is the cross-sectional area of the pipe
The charge is uniformly distributed within volume of each sphere.How much kinetic energy does the block gain.
A 2.00-mol sample of hydrogen gas is heated at constant pressure from 302 K to 414 K. Calculate the energy transferred to the gas by heat
a radio wave, sent from mars to the earthwhen the two are closest to eachother, takes 3.03 minutes. calculate the distance between perihelion and aphelion for mars
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