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A diver springs upward with an initial speed of 1.7 m/s from a 3.0-mboard.
a) Find the velocity with which he strikes the water. [Hint: When the diver reaches the water, his displacement isy = -3.0 m (measured from the board), assuming that thedownward direction is chosen as the negative direction.]
b) What is the highest point he reaches above the water?
In a He+ ion, the electron is in 3S state Assume that units can be chosen that a = 4 ? ?0 h2 / (M e2) = 1, write down the corresponding wavefunction
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A sound wave in air has a frequency of 264Hz and travels with a speed of 347m/s. How far apart are the wave crests
An automobile travels on a straight road for 44 km at 49 km/h. What is the average velocity (in km/h) of the car during this 88 km trip? (Assume that it moves in the positive x direction.)
As part of an exercise routine a 47.0 kg person climbs a set of stairs. Each stepis18.0 cm high and thereare 78 steps in the staircase. Assuming the work done coming down the staircase is negligible, howmany times must this person climb the staircase..
The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge.
A fuzzy die (m = 0.2 kg) hangs from the ceiling of a car
Dr. Bradshaw builds a slide. By lifting one side, he finds that when the slide makes an angle of 32 degrees with the horizontal, Jackson begins to slide. What is Jackson's acceleration
A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-42. The mass of the person plus the bucket is 60 kg. (a) How hard must she pull downward to raise herself slowly at constant speed? If she increases this force by ..
A 12-kg hammer strikes a nail at a velocity of 8.5 m/s and comes to rest in a time interval of 8.0 ms. What is the average force acting on the nail
A UFO streaks across the sky at a speed of 0.90c relative to the earth. What length does the person measure for the UFO when it lands
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