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White light, with frequencies ranging from 4.00 x 10^14Hz to 7.90x10^14HZ is incident on a potassium surface. The work function of potassium is 2.24 eV. Find the maximum kinetic energy of electrons ejected from this surface.
A hot air heating system rated at 84,000 Btu/hr has an efficiency of 65%. determine the temperature of the outlet air
a child drops a small stone into a deep well the sound of the stone striking the water is hear 1.5 seconds after the
A passenger walks from one side of a ferry to the other as it approaches a dock. What is the direction of the ferry's velocity relative to the water
A 10-kg projectile launched over level ground has three times the kinetic energy at the moment of its launch as it does at its peak height. Find its impact velocity
A 3.1 kg bundle starts up a 30° incline with 178 J of kinetic energy. How far will it slide up the incline if the coefficient of kinetic friction between bundle and incline is 0.30
An archer puts a 0.26 kg arrow to the bowstring. An average force of 213 N is exerted to draw the string back 1.3 m. unless otherwise directed, suppose that air resistance is negligible. Illustrate energy bar graphs to solve the problem.
assume four objects each of mass m are placed at the corners of a square os side length, How much work is needed to separate the planets so that they are infinitely away from each other
In the Bohr model of hydrogen, the electron moves in a circular orbit around the nucleus. Determine the angular speed of the electron
An 91 kg man climbs a 981 m high mountain in 1.01 hour and uses 7.6 kcal/min, Determine the power consumption in watts.
A puddle holds 150 grams of water. If .50 grams of water evaporates from the surface, what is the approx temperature altering of the remaining water.
For lead 82Pb206 (atomic mass = 205.974440 u) obtain the binding energy per nucleon (in MeV)
A golfer imparts a speed of 29.2 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. How much time does the ball spend in the air?
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