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An experimenter wishes to arrange a two-slit experiment with 3 eVelectrons so that the n=1 maximum occurs at 15o . What will his slit separation, d, have to be?
An excited state of a certain nucleus has a lifetime of 5 X10-18s. Find the mimimum possible uncertainty of it's energy.
A person of mass 75 kg stands at the center of a rotating merry-go-round platform of radius 3 m, Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk
The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
You have 33 tuning forks that oscillate at close but different frequencies. What are the (a) maximum and (b) minimum number of different beat frequencies you can produce by sounding the forks 2 at a time, depending on how the frequencies differ?
All "simple machines" (pulleys) operate via the same principle. Explain how relative amounts of force used , distance traveled and work done apply to these machines
A cannon located 42 m from the base of a vertical 30 m high cliff has its muzzle pointing towards the cliff at an angle 48° above the horizontal. determine how far the shell lands past the edge of the cliff
A circular loop with a radius of .200m is placed in a uniformmagnectic field of magnitude 0.850T. find the increase in magneticfield through the loop
A river 101.8 m wide flows toward the south at 31.0 m/min. A girl on the west bank wishes to reach the east bank in the least possible time. What is her velocity relative to land
The temperature of human is normally 37.0 degree Celsius. (a) at what wavelength will a human radiate the maximum radiation? (b) estimate the total power radiated by a person of medium build(assume a cylindrical human of height 1.80 meters and rad..
question1a house painter stands 3.0 m above the ground on a 5.0-m-long ladder that leans against a wall at a point4.7 m
A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2, find the volume flow rate Q of the gas
With a wooden ruler you measure the length of a rectangular piece of sheet metal to be 12 mm. What is the ratio of the rectangle's width to its length
A charge Q1 = 6u is at the origin of an x y coordinate system, What are the magnitude and direction of the force of Q2 on Q1, What are the magnitude and direction of the force of Q3 on Q1
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