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a nuclear power plant has an electrical power output of 1000mw and operates with an efficiency of 33 if excess energyis
two automobiles are equipped with the same single-frequency horn when one is at rest and the other is moving toward
a copper wire is 500 m long andhas a cross-sectional area of 20010-4 m2 this wire forms a one turn loop inthe shape of
a singly charged positive ion has a mass of 236 10-26kg after being accelerated through a potential difference of238 v
a satellite of mass 300kg is circuling around the moon ifsatellites velocity is 150 miles per hour determine the radius
an air bubble has a volume of 180cm3 when it is released by a submarine 120 m below the surface of a lake what is the
a ball is dropped from a height of 150m and rebounds to aheight of 120m approxiamtely how many rebounds will the ball
a positive point charge of magnitude 25 muc is at thecenter of an uncharged spherical conducting shell of inner
a 14 m long glass tube that isclosed at one end is weighted and lowered to the bottom of afreshwater lake when the tube
in the afternoon the decibel level of a busy street is95 db with 100 cars passing at a givenpoint every minute late at
a 4 m string is held fixed at both ends when driven by 108 hzsource the string vibrates in 4 distinct segments what is
an object moving in simple harmonic motion has an amplitude of003m and a maximum acceleration of 55ms2 what is the
a cue ball travelling at 50 msmakes a glancing elastic collision with a target ball of equalmass that is initially at
when gasoline is burned it gives off 46000 jgram of heat energyif an automobile uses 16 kg ofgasoline per hour with an
a ball of mass 0150 kg is dropped from rest from a height of125m it rebounds from the floor to reach a height of 0960m
a paperweight when weighed in air has a weight of w 69nwhen completely immersed in water however it has a weight of
a 270 n sphere 020 m in radius rollswithout slipping 60 m down a ramp that is inclined at 31deg with the horizontal
an object moving in simple harmonic motion has an amplitude of005 m and a maximum acceleration of40 ms2 what is the
a rocket is launched straight up from the earths surface at aspeed of 16times104 ms what is its speed when it is very
a 5 gram bullet traveling in 20 0c air at 300 msstrikes a flat steel plate and stops what is the final temperatureof
a cart of mass 250 g is placed on africtionless horizontal air track a spring having a springconstant of 90 nm is
if a large lake is held back by a dam that is equallylong and equally deep compared to another body of water but is
while standing at a crosswalk you hear a frequency of540 hz from an approaching police carafter the police car passes
an aircraft carrier has a speed of 130 ms relative to thewater a jet is catapulted from the deck and has a speed of670
a 30-m-long ladder leans against a frictionless wall the coefficient of static friction between the ladder and the