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The work function for Zinc is 4.31 eV.
(a) Find the cutoff wavelength for zinc.
(b) what is the lowest frequency of light incident on zinc that releases photo-electrons from its surface?
(c) If photons of energy 5.50 eV are incident on zinc, what is the maximum kinetic energy of the ejected photoelectrons?
Sketch a free-body diagram of the plank. How far can a painter of mass 70.0 kg walk on the overhanging part of the plank before it tips.
The cylindrical space station, 200 m in diameter rotates in order to give artificial gravity of 3.0 g for the occupants. How much time does it take, in seconds, to complete one revolution.
In one dimension, it is obvious that the force obeying Hook's law is conservative. Consider instead a spring that obeys Hook's law and has one end fixed at origin.
What is the tangential velocity of a satellite in a circular orbit 300km above the surface of the Earth, How long does the satellite take to complete one orbit
A major-league pitcher can throw a baseball in excess of 48.7m/s. If a ball is thrown horizontally at this speed, how much will it drop by time it reaches the catcher who is 15 m away from the point of free.
Two loudspeakers are vibrating in phase. They are set up as point C is located. Assume the speed of sound is 342 m/s. The speakers play the same tone. What is the smallest frequency that would produce destructive interference at point C.
A conducting wire formed in the shape of a right triangle with base b = 38 cm and height h = 63 cm, What is the angular frequency of rotation
A 102-N grocery cart is pushed 13.0 m by a shopper who exerts a steady horizontal force.
A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 29.5°, find the critical angle for the liquid when surrounded by air
The archerfish successfully shoots down the resting insect by spitting water drops at the same angle 60^circ above the surface and with the same initial speed v as before. At what height h above the surface was the insect.
An airplanes airspeed (relative to still air) is 135 mph. The wind speed relative to the ground is 37 mph and is directed at theta = 51 deg
A flashlight on the bottom of a 3.70 m deep swimming pool sends a ray upward at an angle, What angle (in air) does the emerging ray make with the water's surface
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