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1 How much energy is required to remove an electron from a hydrogen atom in a state with n = 8?
2. A photon ionizes a hydrogen atom from the ground state. The liberated electron recombines with a proton into the first excited state, emitting a 466 Å photon. What are
(a) the energy of the free electron and
(b) the energy of the original photon?
At low frequencies the dielectric constant of a medium is 4.4. The speed of light is 2.998 × 108 m/s. Find the speed of low-frequency radio waves in the medium
A car approaches him at 100 m/s and emits a sound at frequency 1100 Hz. The air is still and the speed of sound is 340 m/s. What frequency will the pit crew member hear?
The switch in given Figure has been in position A for a long time and is moved to position B at t = 0.- The switch suddenly returns to position A after 10 ms. Find vC(t) fort ≥ 0 and sketch its waveform.
A bowling ball of mass 1 kg, drops onto a spring from 0.2 meter height. The spring constant is also 1. What is the velocity when the ball hits the spring
A 1200-turn coil of wire that is 2.1 cm in diameter is in a magnetic field that drops from 0.11 T to 0 in 12 ms. What is the emf of the coil
A series RLC circuit has R=2.6?, L=9.5 mH, C=2.45 mF, Vm=110V, and ?=377 rad/s. find the phase difference between the voltage and the current
A 6 m long 50 kg ladder leaning on a frictionless wall can successfully be scaled by a 120 kg man. find the minimum angle between the ladder and the floor
A ball dropped from a height of 4.00 m makes an elastic collision with the ground. Assuming no mechanical energy is lost due to air resistance, a) show that the ensuing motion is periodic, b) find the period of the motion.
A 1.0-cm-diameter microscope objective has a focal length of 2.8mm. What is the resolving power of the objective if it is used in an oil-immersion microscope with noil= 1.45
A partly full paint can has 0.61 U.S. gallons of paint left in it. What is the volume of the paint in cubic meters? If all the remaining paint is used to coat a wall equally (wall area = 10 m2), how thick is the layer of wet paint? Give your answer i..
the pressure att he depth of 1.25 m in a tank of liquid is measured to be 125.5 kpa. the tank is open to the outside
A parallel-plate capacitor has circular plates of 6.10 cm radius and 1.10 mmseparation. Calculate the capacitance.
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