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an 825-kg space vehicle is circling earth in a circular orbit with a radius of 10300 km its orbit is to be changed to a
a string passing over a pulley has a 370 kg mass hanging from one end and a 260 kg mass hanging from the other end the
a dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency
recently a new element has been isolated temporarily named ununseptium with atomic number 117 the longest-lived isotope
a light beam containing red and violet wavelengths is incident on a slab of quartz at an angle of incidence of 853deg
a car moving at 10 ms encounters a bump that has a circular cross-section with a radius of 30 m what is the normal
a block of mass m1 on a smooth horizontal surface is connected to a ball of mass m2 by a lightweight cord over a
a spacecraft moving away from earth emits a 4990 hz signal a scientist on earth measures the signal to be 4989 hz what
a 25 turn circular coil of length 55 cm produces a magnetic field of magnitude 25 mt at its center find the current in
a loundspeaker diaphragm is producing a sound for 21 s by moving back and forth in a simple harmonic motion the angular
a cat crouches on the floor at a distance of 16 m from a desk chair of height 45 m the cat jumps onto the chair landing
a super ball made of rubblerlike plastic is thrown against a hard smooth wall the ball has a mass of 40g and strikes
a grindstone of radius 40 m is initially spinning with an angular speed of 80 rads the angular speed is then increased
a semicircular loop lies in the z 0 plane and carries a current i 50 a when a magnetic flux density b 2ay az t is
a ship travels 80 km due north on the first day of a voyage 50 km northeast on the second day and 90 km due east on the
your car has stalled and you need to push it you notice as the car gets going that you need less and less force to keep
together two students exert a force of 640 n in pushing a car a distance of 30 ma how much work do the students do on
a bas traveling at 250 ms applies the brakes and decelerates uniformly at a rate of 12 ms a how far does it travel in
sally expends 10320 j of energy to drag a wooden crate 247 m across a floor with a constant speed the rope makes an
brutus a champion weightlifter raises 240 kg of weights a distance of 270 ma how much work is done by brutus lifting
a movers dolly is used to transport a refrigerator up a ramp into a house the refrigerator has a mass of 108 kg the
unpolarized light of intensity i0 is incident on a stack of 7 polarizing filters each with its axis rotated 15 degrees
unpolarized light with intensity 370 w m2 passes first through a polarizing filter with its axis vertical then through
a parallel plate capacitor has a capacitance of 10mf and its charge with a 20v power supply the power supply is then
the intensity of sunlight reaching the earth is 1360 wm2part a what is the power output of the sunp wpart b what is the