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when you press one of the buttons on a small calculator a 35 v battery provides a small constant current of 60mua for
a middle-aged people usually have poorer hearing than a middle-aged woman in one case a woman can just begin to hear a
the sound in a classroom is 61000 times as intense as the minimum threshold of hearing find what is the intensity level
a truck traveling east at 21 ms sounds a 1200 hz horn find the wavelength of the sound heard by a stationary listener
a man weighs 851 newton in air and has a body fat percentage of 208 percenta find the overall density of this man
in some kinds of optical spectroscopy such as photoluminescence and raman spectroscopy a laser beam exits from a pupil
transverse waves a traveling on a 150 meter long piano string at 600 ms if the points of zero vibration occur at
bats can detect small objects such as insects that are of a size on the order of a wavelength if bats emit a chirp at a
a 20 cm times 20 cm times 20 cm box contains 0038 mol of nitrogen at 27degreec find the rate of collisions on one wall
a slide projector desires to create a 98 centimeter high image of a 2 centimeter tall slide the screen is 300
during the spin-dry cycle of a washing machine the motor slows from 95 rads to 30 rads while the turning the drum
a racing bike travels 141 meter along a circular track of radius 15 meter find the angular displacement of the racing
a 12 kilogram object moving with a speed of 8ms collides perpendicularly with wall and emerges with a speed of 6ms in
a wheel starts from rest and rotates with a fix angular acceleration about a fixed axis it completes the first
because gasoline is less dense than water drums containing gasoline will float in water assume a 210-l steel drum is
a laser beam enters a 180 centimeter thick glass window at an angle of 38 degree from the normal the index of
a 3kilogram mass sliding on frictionless surface has a velocity of 5ms east when it undergoes a one-dimensional
a major league pitchers can throw a ball in excess of 395 ms if a ball is thrown horizontally at this speed find how
a metal wire 75 centimeter long and 0130 centimeter in diameter stretches 00350 centimeter when a load of 8 kilogram is
a thin film of polystyrene of refractive index 149 is used as anon reflecting coating for fabulite strontium titanate
a pipe which has a cross sectional area a is bent at a 90 deg angle liquid with density rho is flowing along this pipe
in a rutherford scattering experiment a target nucleus has a diameter of 126e-14 m the incoming alpha particle has a
a 750 kg rider sitting on a 76 kg bike is riding along at 87 ms in the positive direction the rider drags a foot on the
unpolarized light is incident on a stack of two polarizing sheets at what angle should the transmission axes of all
the last stage of a rocket is traveling at speed of 7800 ms this last stage is made up of two parts that are clamped