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A spherical virus has a diameter of 50 nm. It is contained in a long, narrow cell of length 1 x 10-4 m. What uncertainty does this imply for the velocity of the virus along the length of the cell? Assume that the virus has a density equal to that of water.
Automobile windshield wipers can be used intermittently during rainfall. what determines the length of the intervals when the wiper is on and when it is off
A tiny particle of density 3275 kg/m3 is at the same distance from the Sun as the Earth is (1.5 1011 m). Assume that the particle is spherical and perfectly reflecting. What would its radius have to be for (the force due to) the outward radiation pre..
A 9.0-V battery is connected in series with a 35-mH inductor, a 168-? resistor, and an open switch. How much energy is stored in the inductor at this time
A ball rolling down an incline travels 6 cm in the first .25 seconds, and 24 cm in the first .50 seconds. find the average speed for the second quarter second time interval
Suppose the earth were made entirely of hydrogen and oxygen, with two atoms of hydrogen for each atom of oxygen. how long could the earth produce the same luminosity as the Sun
q1. damping is negligible for a 0.139 kg mass hanging from a light 7.00 nm spring. the system is driven by a force
A cube of mass m = 7.25 kg is placed on an inclined plane of mass M = 12.47 kg, which makes an angle ? = 39.80° with the horizontal. What is the normal force on the inclined plane
A 20.0 cm long organ pipe is filled with air and is open at one end and closed at the other. What is the frequency of the third mode
A 15-kg block rests on a level frictionless surface and its attached by a light string to a 5.0-kg hanging mass, What is the tension in the connecting string
A cockroach of mass m lies on the rim of a uniform disk of mass 7.00 m that can rotate freely about its center like a merry-go-round. obtain the angular velocity of the cockroach-disk system
An organ pipe is 1.42 m long. What is the first harmonic frequency of this pipe when it is open at both ends
A point source of light illuminates an aperture 1.96 m away. How wide is the aperture
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