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the intensity of laser light of 620 nm wavelength incident on a solid surface with a work function of 0.5 ev is doubled. By what factor does the kinetic energy of the electrons increase?
A spring-loaded toy gun is used to shoot a ball of mass straight up in the air, as shown in the figure. (Figure 1) The spring has spring constant . If the spring is compressed a distance of 25.0 centimeters from its equilibrium position and then r..
The ground state of the realistic helium atom is of course nondegenerate. However, consider a hypothetical helium atom in which the two electrons are replaced by two identical spin-one particles of negative charge. Neglect spin-dependent forces. F..
A plastic light pipe has an index of refraction of 1.53. For total internal reflection, what is the minimum angle of incidence
A ball rolls off a table and falls 0.81 m to the floor, landing with a speed of 5.5 m/s. What initial speed must the ball have if it is to land with a speed of 6.3 m/s
high-impact activities such as jogging can cause considerable damage to the cartilage at the knee joints. peak loads on
At what angle to the surface must a diver submerged in a lake look toward surface to see the setting Sun just all along the horizon.
steel train rails are laid in 12m long segments placed end to end. the rails are laid on a winter day when their
A tennis player, when performing a serve, applies an average force to a tennis ball of 525 N to a 55 g ball. What is the speed of the ball as it leaves the racket
Two 1000 kg cars drive east; the first moving at 25 m/s, the second at 15 m/s. What is the magnitude of the total momentum of the system
if a river flows due east at 1.68m/s. a boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 13.40m/s due north relative to the water. if the river is 178m wide, how far downstream is the boat when i..
a jetliner is moving at a speed of 270 km/h. the plan then decelerates at 4.5 m/s2. what is the minimum runway length on which this aircraft can land
4.10g of nitrogen gas at 20.0 C and an initial pressure of 2.70 atm undergo an isobaric expansion until the volume has tripled. The gas pressure is then decreased at constant volume until the original temperature is reached. What is the gas pressur..
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