Aperson's vision may be improved significantly by having the comea reshaped with a laser beam, in a procedure known as photorefractive keratectomy. the excimer laser used in these treatments produces ultraviolet light with a wavelength of 200 nm. part a) what is the difference in energy between the two levels that participate in stimulated emission in the excimer laser? part b) how many photons from this laser are required to deliver an energy of 1.64x10^-18 j to the cornea?

b. a lightning bug, plug of grass, and a worm

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.

answer///isobars;