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Electrons in a photoelectric experiment emerge from an aluminum surface with a maximum kinetic energy of 2.1eV. What is the wavelength of the incident radiation?
An electric field E with an average magnitude of about 150 N/C points downward in the atmosphere near Earth's surface, What charge (both sign and magnitude) must be used
What kind of mirror must be used and what must its radius of curvature be?
What is the maximum positive potential energy. Write down an expression for U as a function of x, with U in joules and x in meters.
Find the Band Structure and Band Occupancy
Stan accelerates from a standing start at 2 m/s^2 and one second later Kathy accelerates from a standing start at the same position at 4 m/s^2. how long does it take Kathy to catch Stan
A battery with an emf of 12.0 V shows a terminal voltage of 11.5V when operating in a circuit with two lightbulbs rated at 3.0 W, What is the battery's internal resistance
In one such decay, the electron and the neutrino are emitted at right angles to each other. The electron(mass 9.11 x 10^-31kg) has a speed of 5.00×10^7m/s and the neutrino has a momentum of 8.10×10^-24kg m/s. What is the recoil speed of the nucleu..
It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.175 s, elucidate what is the average force exerted on the ball by the wall?
how long does it take for a person to radiate. Calculate the time of flight.
What is the angular speed of the bar at the moment the bug jumps?
A planet of mass 6.00 1025 kg is in a circular orbit of radius 2.00 1011 m around a star. The star exerts a force on the planet of constant magnitude 5.03 1023 N. The speed of the planet is 4.09 104 m/s. All through this half "year", how much work is..
To explain why he seems to hang in the air, compute the ratio of the time he is above ymax/2 moving up to the time it takes him to go from the floor to that height. You may ignore air resistance.
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