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a 40 kg block rests at the edge of a disk with a mass of 50 kg and a radius of 30 cma a 2 n force is applied to the
an astronaut is stuck in space with no fuel for his thrusters he is 250 m away from his ship and only has a heavy
a snowball rolls down a 200 m long hill at an angle of 30o above the horizon after leaving the hill it rolls toward a
an engine delivers 400 j of work while it takes in energy from a 400 k thermal source if the engine discharges energy
if 100 mol of oxygen is heated at constant pressure of 100 atm from 100degc to 250degc how much heat is absorbed by the
a toy steam engine has a mass of 100 kg the toy starts from rest and reaches a velocity of 400 ms in a time of 300
a horizontal plank 400 m long and having mass 200 kg rests on two pivots one at the left end and a second 100 m from
a kilogram of water c 4186 kjkg degc is stirred using a 400 watt device for 5 minutes at the end of this time the
a converging lens of focal length 770 cm is placed 520 cm behind a diverging lens parallel light enters the diverging
calculate the maximum electric field associated with a laser beam operated with a 10 mw power supply and a beam
a brass plate measures 300 cm by 400 cm the coefficient of linear thermal expansion is 190 10-6degc if the temperature
a 100 liter water bottle is filled to the brim with water when the temperature is 500degc the bottle is sealed after it
an ambulance is generating a siren sound at a frequency of 2400 hz the velocity of sound is 3450 ms if the observer is
the sound of a bird singing is given as 5 db what is the intensity of the sound of a bird
you see lightning flash followed 82 seconds later by the sound of thunder the ambient air temperature is 12degc
the bulk modulus of aluminum is 71 1010 nm2 if the density of aluminum is 27 103 kgm3 then what is the speed of sound
a pendulum with a mass of 1kg on a light string 1 meter long is dropped from a position with the string held level
an object is placed between two plane mirrors arranged at right angles to each other at a distance d1 from the surface
a roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r a passenger feels the
the moon orbits the earth at a distance of 385 x 108 m assume that this distance is between the centers of the earth
two stones are thrown simultaneously one straight upward from the base of a cliff and the other straight downward from
a vw beetle goes from 0 to 102 mih with an acceleration of 659 ms2a how much time does it take for the beetle to reach
a block of iron is suspended from one end of an equal-arm balance by a thin wire to balance the scales 615 kg are
the gauge pressure at the bottom of a reservoir is 50 times what it is at a depth of 18 m how deep is the
a 1100 kg car carrying four 84 kg people travels over a rough washboard dirt road with corrugations 40 m apart which