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Electrons are ejected with a maximum velocity of 5.1 x 105 m/s from a metal when illuminated by photons with a wavelength of 440 nm. Calculate:
a. The energy of the incident photons.
b. The work function of the metal.
c. The longest wavelength of light which will result in electron emission.
Assuming it possible to travel at 0.95 c to a star at a proper distance of 100 light years from earth, calculate the following:
a. how long the trip to the star would take from the perspective of the traveler.
b. the distance between the earth and the star from the perspective of the traveler.
Three point charges are located near a spherical Gaussian surface of radius R = 6 cm. What is the electric flux through this surface
The rod shown in the drawing is pivoted about an axle passing through its center (solid circle). Is the net torque about the axle due to these forces zero
The pulley is located so that the string makes a 45 degree angle with the beam. The beam is uniform, 5 meters long, and has weight. The professor stands 2 meters from the pivot point and has weight.
A U-shaped tube is filled mostly with water, but some vegetable oil has been added to both sides of the U tube. Find the difference in fluid level between the two sides of the tube
A coil of 1800 turns has an induced voltage of 150 volt. Calculate the rate of flux change in Wb/s
Estimate the electron drift velocity. Estimate the current density. Estimate the electric field in the wire.
Two point charges 0.606 m apart experience a repulsive force of 0.368 N. The sum of the two charges equals 1.08 10-5 C
What is the final speed of the crate after being pulled. On a very muddy football field, a 100 linebacker tackles an 80 halfback. Immediately before the collision, linebacker is slipping with a velocity of 8.5 north and the halfback is sliding with..
A car is parked on a steep incline, making an angle of 37.0° below the horizontal and overlooking the ocean, when its brakes fail and it begins to roll. Starting from rest at t = 0, the car rolls down the incline with a constant acceleration of 3...
Discuss briefly centripetal acceleration, the speed and the force exerted by a ball attached to a string.
An ordinary workshop grindstone has a radius of 7.50 cm and rotates at 6000 rpm. What is the linear speed of a point on its edge
An electron is confined to a box the size of a small atom, 0.12nm across. ?p, What wavelength photon would have the same energy
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