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A hydrogen atom initially in the n = 2 level emits a photon and ends up in the ground state.
(a) What is the energy of the emitted photon?_________ eV
(b) If this atom then absorbs a second photon and returns to the n = 2 state, what must the energy of this photon be? _________eV
One of the first signs of sunburn is the reddening of the skin (called erythema). How many photons are incident on the skin in this amount of exposure
A gray kangaroo can bound across a flat stretch of ground with each jump carrying it 11 from the takeoff point. If the kangaroo leaves the ground at a 21 angle, what is its takeoff speed
A transparent oil with index of refraction 1.29 spills on the surface of water (index of refraction 1.33), producing a maximum of reflection with generally incident red light (wavelength 700 nm in air). Assuming the maximum occurs in the first order;..
Calculate the magnitude of the gravitational force exerted ona 441-kg satellite that is a distance of 2.17 times earth radii from the center of the earth. What is the magnitude of the gravitational force exerted on the earth by the satellite? Deter..
Discuss the manufacturing and other techniques that allows today's firms to address needs of scale/efficiency and customization simultaneously.
A bicycle wheel has an initial angular velocity of 7.2 rad/s. After turning during one-half of a revolution, the angular velocity is reduced to 2.2 rad/s. If the angular acceleration of the wheel is constant through the motion, how long will it take ..
A box, initially at rest on the ground, is lifted straight upin the air by a rope, moving straight up at constant speed. When it's gotten pretty high off the ground, the rope is released,and the box falls back to the ground. Sketch a graph of the ..
Four point charges are positioned on the rim of a circle. The charge on each of the four is +0.5 µC, +1.5 µC, -1.0 µC, and -0.5 µC, determine the total electric potential at the center due to the four charges
A tight uniform string with a length of 1.80 m is tied down at both ends and placed under a tension of 100 N. What is the mass of the string
Transverse waves of amplitude 0.8 mm travel at 60 m/s along a ropeof linear mass density 3.5 g/m. A 50 Hz oscillator is connected toone end. What is the average power supplied by the oscillator
Suppose that you wish to fabricate a uniform wire out of 1.00 g of copper. Assume the wire has a resistance R = 0.700 %u03A9, What will be the length of the wire
What is the angular speed of the turntable when the child is 2.50 m from the center, assuming that you can treat the child as a particle?
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