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a rocket accelerates upwards from rest at 20 mfor 4 seconds then its engine shuts off find the maximum height reached
a 400-m length of light nylon cord is wound around a uniform cylindrical spool of radius 0500 m and mass 100 kg the
a light spring of constant k 155 nm rests vertically on the bottom of a large beaker of water as seen in the picture
the pressure fluctuation of sound waves at the closed end of a pipe vibrating at resonance is 1 minimum 2 12 minimum 3
a string is wrapped tightly around the circumference of a wheel with a mass of 123 kg and a radius of 0324 m the string
a 50 kg man is ice-skating due north with a velocity of 60 ms when he collides with a 32 kg child the man and child
in 1993 a giant 400-kg yo-yo with a radius of 15 m was dropped from a crane at height of 57 m one end of the string was
the potential energy of a 1 10-6 c charge decreases from 006 j to 002 j when it is moved from point a to point b what
a bat at rest sends out ultrasonic sound waves at 523 khz and receives them returned from an object moving directly
at t20degreesc how long must an open organ pipe be to have a fundamental frequency of 313hz q 2if this pipe is filled
two electric dipoles with charges plusmnq where q50 c are arranged parallel to each other the distance between the
an electron and a proton have charges of an equal magnitude but opposite sign of 16 10-19 c if the electron and proton
two positive charges each of magnitude 1 10-6 c are located a distance of 14 cm from each othera what is the magnitude
a woman finds the front windshield of her car covered with ice at -120 degc the ice has a thickness of 450 x 10 -4 m
if the only forces acting on a 20-kg mass are n and n what is the magnitude of the acceleration of the
at a rock concert a dbmeter registered 126db when placed 23m in front of a loudspeaker on the stage1 what was the power
a satellite is in a circular orbit around the earth at an altitude of 338 106 ma find the period of the orbit hint
in 20 minutes a ski lift raises four skiers at a constant speed to a height of 140 m the average mass of each skier is
light from an argon laser strikes a diffraction grating that has 5350 grooves per centimeter the central and
a basketball player makes a jump shot the 060 kg ball is released at a height of 20 m above the floor with a speed of
intense white light is incident on a diffraction grating that has 625 linesmma what is the highest order in which the
two tugboats pulls a disabled supertanker each tug exerts a constant force of 180x106 n one of them at an angle of
a rock is projected from the edge of the top of a building with an initial velocity of 122 ms at an angle of 53 above
a pot of water is boiling under one atmosphere of pressure assume that heat enters the pot only through its bottom
a closed box is filled with dry ice at a temperature of -942 oc while the outside temperature is 210 oc the box is