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Light with a frequency of 2.77 x 1015 Hz strikes a metal surface and ejects electrons that have a maximum kinetic energy of 7.0 eV. What is the work function (in eV) of the metal?
The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. What is the current coming from the wall socket
an object is being pulled toward the origin. the force pulling on the object is fx -kx2 gravitational and electrical
A 2.03 kg book is placed on a flat desk. Suppose the coefficient of static friction between the book and the desk is 0.502, How much force is needed to keep the book moving at constant speed once it begins moving
A 20.0cm long organ pipe is filled with air and is open at one end and closed at the other. What is the frequency of the third mode
a .5 m length of rigid metal rod is connected through two springs with 10 nm spring constants perpendicular to the rod
An unknown number of moles of an ideal monoatomic gas expand reversibly from Vi = 1.30 m3 to Vf = 2.20 m3, Calculate the work done by the gas
A person sitting in a stationary boat notices the waterwaves passing by the bow of the ship once every 4 seconds. At what speed are the water waves moving
Old MacDonald had a farm, and on that farm he had a gate (see below). The gate is 3m wide and 1.8m high, with hinges attached to the top and bottom. The guy wire makes an angle of 300 with the top of the gate and is tightened by a turn buckle to a..
Calculate the magnitude of the gravitational force exerted on a 429-kg satellite that is a distance of 2.91 times earth radii from the center of the earth. What is the magnitude of the earth's acceleration
A car with a mass of 1.50x10^3 kg starts from rest and accelerates to a speed of 18.0 m/s in 12s. Assume that the force of resistance remains constant at 400-N all through this time. What is the average power developed by the car's engine?
An emf is induced in a conducting loop of wire 1.14m long as its shape is changed from square to circular, Find the average magnitude of the induced emf if the change in shape occurs in 4.23s
a girl uses a jump rope made of flexible wire. she holds the ends of the rope in extended hands, What is the amplitude of oscillation of this alternating emf
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