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A photoelectric effect experiment finds a stopping potential of 1.93 V when light of wavelength 200 nm is used to illuminate the cathode.
a) what metal is the cathode made?b) what is the stopping potential if the intensity of light is doubled?
Show that the average speed of a tennis ball is 48 m/s when it travels the full length of the court, 24 m, in 0.5 s. How would air resistance affect the travel time
A 77 person stands on the uniform ladder 4.0 long, that weighs 100. The floor is rough; hence, it exerts both a normal force, and a frictional force, on the ladder. The wall, on the other hand, is frictionless; it exerts only the normal force.
A particle of rest mass M, travelling at speed v in the x-direction, decays into two photons, moving in the positive and negative x-direction relative to the original particle. What are their energies
Let there be a 6 volt energy source and a resistor of 10 ohms in a circuit. Determine the current and power
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 4735 kg), which is made of steel (? = 7810 kg/m3). What is the buoyant force on one ping-pong ball in water
The spheres are touched together and are then returned to their original separation d. Illustrate what is the force between them.
Two out-of-tune flutes play the same note. One produces a tone that has a frequency of 243 Hz, What is the frequency of the tuning fork
The record distance in the sport of throwing cowpats is 81.1 m. This record toss was set by Steve Urner of the United States in 1981, Determine the initial speed of the projectile
A horizontal force of 20 N pulls a block of mass 3.7 kg across a level floor. The coefficient of kinetic friction between the block, what is the final speed of the block
A uniform rod of weight W is supported horizontally by two bricks at its ends. Calculate the Force on the other support immediately thereafter, it should be in terms of W
Coherent light that contains two wavelengths, 660 nm and 470 nm, passes by two narrow slits with a separation of 0.280 mm and an interference pattern is observed on a screen which is a distance 4.40 m from the slits.
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, Find the expressions for the electric field inside the sphere
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