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During a particular thunderstorm, the electric potential differencebetween a cloud and the ground is Vcloud -Vground = 2.60*108 V, with the cloud being at the higherpotential. What is the change in an electron's electric potentialenergy when the electron moves from the ground to the cloud?
A 723-N person stands on a uniform board of weight 282 N and length 6.1 m. How far from the left end of the board is the person standing
A square wire 2.0 cm on each side is oriented so that 5.00 mT magnetic field makes a 30 degree angle with the normal to the plane of the square. how many loops does the wire make
On July 15, 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere, How many hours does it take this satellite to make one orbit
An unknown tuning fork produces a beat frequency of 3Hz when played with a 440Hz fork, What is the frequency of the unknown fork
An undersea research chamber for aquanauts is spherical with an external diameter of 7.93 m. The mass of the chamber, when occupied, is 64800 kg. What is the buoyant force on the chamber
Suppose that charges on a dipole antenna oscillate slowly at a rate of 1 cycle/s, and the antenna radiates electromagnetic waves in a region of space. What is the period of the charge oscillation
A laser produces a cylindrical beam of light of wavelength 400nm. The average energy in a 2m length of the beam is 5*10^-8J. What is the average power output of the laser
A convex mirror has a focal length of -30 cm. Find the magnification produced by the mirror when the object distance is 8 cm
One cubic centimeter of a cumulus contains 420 water drops,which have a typical radius of 10 μm .(a) How many cubic meters of water are in acylindrical cumulus cloud of height 3.1 km and radius 0.9 km?
A ball is thrown horizontally with a speed of 10.0m/s, from the edge of the top of a building of height 19.6m, What is the vertical component of the velocity just before the ball strikes the ground
A bat at rest sends out ultrasonic sound waves at 53.5kHz and receives them returned from an object moving directly away from it, What is the received sound frequency
Find the force P that must be applied to a piston of area10.10cm^2to produce sufficient fluid pressure to support a car weighing 11,301N by means of a column of fluid of cross sectional area280cm^2
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