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a race car travels with a constant tangential speed of 750ms around a circular track of radius 625m finda- the
the isotope 210po eventually decays after two transitions to stable 206pb polonium was the isotope that was used to
an auto race is held on a circular track a carcompletes one lap in a time of 189 s with an average tangentialspeed of
many years ago the federal communications commission fcc assigned microwave ovens two different operational frequencies
the electromagnetic wave spectrum is divided into two sections ionizing and nonionizing radiation photons of about 124
a viewing window on the side of a large tank at a publicaquarium measures 50 in by 60 in the average gauge pressure
theoretically the most efficient engine possible isa porsche carrera special engine b carnot cycle heat engine c
a bicycle tire pump has a piston with area 44in2 if a person exerts a force of 30 lb on the pistonwhile inflating a
an elevator is able to raise 1000kg to a height of 40m in15sa how much work does the elevator dob what is the elevators
hail is falling on the roof of a car at a mass rate ofmt 0070kgs and an inital velocity of v0 -10ms and strikes the
the only two forces acting on a body have magnitudes of 20 nand 36 n and directions that differ by40deg the resulting
a student drops a water ballon out a dorm window 12 m abovethe ground what is its speed when it hits the
in compressing the spring in a toy dart gun 05 j of work isdone when the gun is fired the spring gives its potential
calculate the average power output in watts of a photodetector that collects 80 x 107 photons in 38 ms from
a piece of wood of density 936 kgm3 and volume 17m3 is floating in water of density 1000kgm3 what volume of the wood in
1 a 50 kg child jumps into a small pool of water through a distance of 3 m and aquires 1000 j of kinetic energy
the rock weighs 100-lb and is lifted 1ft by thelevera how much work is doneb the other end of the lever is pushed down
thermal windows that are advertized to prevent heat gain in the sumer are tinted double paned with a vacuum between the
1 lead has a specific hat of 0031 calgram deg c how many calories does it take to raise the temp of 200 g of lead from
a cart of mass 2m has a velocity of vo before itstrikes another cart of mass 3m at rest what is the new velocity if the
water waves in a lake travel 377 m in 209 s the period of oscillation is 15 s what is the speed of the water waves
a rocket is lauchned upward with a velocity of 3mshow long does it take to reach the top of its trajectoryhow long is
george washington stands on the shore of the delaware river he sees the river flowing past him at a speed of 150 ms and
two charges repel each other with a force of 10-6 nwhen they are 10 cm apart find the forces between the samecharges
kinetic energy is a microscopic concept the equivalent cacroscopic concept isa mass b entropy c temp d heatthe second