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Light with a frequency of 2.55 x 1015 Hz ejects electrons from the surface of aluminum, which has a work function of 4.28 eV. What is the minimum de Broglie wavelength of the ejected electrons? nm
A point charge Q is placed inside a hollow metal sphere of radius R. The sphere is hold no net charge. What is voltage on the surface of the sphere
A diver shines a flashlight upward from beneath the water at a 43.7 %u2218 angle to the vertical. At what angle does the light leave the water
The train passes point A with a speed of 30 m/s and begins to decrease its speed at a constant rate of at = -0.25 m/s2. Determine the magnitude of the acceleration of the train
A 5 m long string has a mass of 110 g and is under a tension of 900 N. What is the speed of a transverse wave pulse on this wire
Telescopes can be networked together to give an apparent aperature equal to their separation. Telescopes on either side of Earth can be combined to give an aperature of 8000 miles, greatly improving resolving power. What is this technique called?
The cannonball is fired at a speed of 53.0 and an angle of 31 above horizontal. A cannonball that was accidentally dropped hits the moat below in 1.40. How far from the castle wall does the cannonball hit ground.
An ideal air conditioner operating on a Carnot cycle absorbs heat Q2 from a house at temperature T2 and discharges Q1 to the outside at temperature T1, consuming electrical energy E.
A round pipe of varying diameter carries petroleum from a wellhead to a refinery. At the wellhead the pipe\'s diameter is 59.7 cm (0.597 m) and the flow speed of the petroleum is 10.7 m/s. what is the pipe\'s diameter at the refinery
A student sees a newspaper ad for an apartment that has 1630 square feet (ft2) of floor space. How many square meters of area are there
Atomic physics, you begin with 227 over 89. Then there is an alpha decay, What isotope is left after EACH of the decays
Calculate the energy and velocity of the a-particle - prove that the final energy of the a-particle is given by
A particle (M1 = 1.47 kg) moving at 30.0° downward from the horizontal with v1 = 2.53 m/s hits a second particle (M2 = 3.47 kg), What is the speed of M2 after the collision
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