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Lithium, beryllium, and mercury have work functions of 2.30eV,3.90eV, and 4.50eV respectively. Light with a wavelenth of4.00 X 102 nm is incident on each of these metals.
(a.) Which of these metals emit photoelectrons in response to the light?Why?
(b.) Find the maximum kinetic enery for the photoelectrons in each case?
starting from its nest, an eagle flies at constant speed for 3.0 min due east, then 4.0 min due north. how long is the eagle in the air
Find time constant if the ball's amplitude has decreased to 2.20 cm after 51.0 oscillations? Explain your answer.
A car of mass 960 travels at a speed of 30 along the straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.88. Take the acceleration due to gravity to be 9.80..
You and a friend each drive 67 km. You travel at 88.1 km/h, your friend at 952.6 km/h. How long would your friend wait for you at the end of the trip.
You are given a pair of Hemholtz coils, each with radius R = 12 cm, containing 140 turns of wire in each coil. Calculate the magnetic field produced in the center of the space between the coils
welding machine draws a 18A of current at 240V. When it is inadvertently connected to a 120V outlet, the current in it is 10A. Is the machine's resistance ohmic
For a camera equipped with a 51-mm focal-length lens, How far is the object from the image on the film
The spring of the pressure gauge shown in has a force constant of 1 400N/m, and the piston has a diameter of 1.60cm. When the gauge is lowered into water in a lake, what change in depth causes piston to move in by 0.850cm.
find the volume of the irregularly shaped object. What is sigma_inner, the surface charge density (charge per unit area) on the inner surface of the conducting shell.
Calculate the angular velocity? of an electron orbiting a proton in the hydrogen atom, given the radius of the orbit is 0.500x10-10 m . You may assume that the proton is stationary and the centripetal force is supplied by Coulomb attraction.
Ships A and B leave port together. For the next two hours, What is the distance between the two ships two hours after they depart
A large tub rests at the edge of a table 1m high. The tub is full, and is 2m tall with an area of 1000cm^2. Determine the speed of the water as it leaves the side
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