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The work function of a certain metal is ? = 3.05 eV. Determine the minimum frequency of light f0 for which photoelectrons are emitted from the metal. (Planck's constant is: h = 4.1357×10-15 eVs.)
Determine the corresponding wavelength of light. (Possibly useful constant: hc = 1240 eVnm.)
Calculate the kinetic energy of the emitted electrons if the frequency of the photons is doubled to 2f0.
find the speed of the test charge when it reaches the center of the square.
a 10.0kg, 16.0m long, uniform beam is supported by two scales. A 40.0kg box is placed on the beam. what are the scale readings
A truck is traveling at 11.1 m/s down a hill when the brakes on all four wheels lock. How far does the truck skid before coming to a stop
A piano is brought upstairs by two workers. Due to a mistake by one of the workers, the piano rolls down the stairs and finally comes to rest by the outside door.
A 2.20-mol sample of helium gas initially at 300 K, and 0.400 atm is compressed isothermally to 1.00 atm. Find the energy transferred by heat
a man drives a car at a speed of 20 m/s off 30 m high cliff. the road leading to the cliff is inclined upward at angle of 20 degrees. how far from the base of the cliff the car land
An object is placed farther from a converging lens than twice the lens' focal length. Draw a ray diagram to determine the nature of the image and describe it
A train moving with constant velocity travels 180 meters north in 14 seconds and an undetermined distance to the west. compute the direction of the train's motion relative to north
How far will the ball travel if the bat is 1 m in length if the instaneous linear velocity of the bat is 37.5 m/s at the moment of impact
A single-turn circular loop of radius 5.5 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.7
A drum major twirls a 93-cm-long, 440g baton about its center of mass at 150rpm. What is the baton's rotational kinetic energy
A flywheel is rotating initially with an angular velocity of 3.0 rad/s clockwise. Sometime later it is rotating with an angular velocity of 8.0 rad/s counterclockwise. What is the direction of the angular acceleration
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