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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
a rifle is aimed horizontally at a target 30 m away the bullet hits the target 19 cm below the aiming point a what are
six concentric conducting spheres a b c d e and f having radii r 2r 3r 4r 5r and 6r respectively spheres b and c are
a small ferryboat is 400 m wide and 600 m long when aloaded truck pulls onto it the boat sinks an additional370 cm into
a 100 ball of clay is thrown horizontally with a speed of 9ms toward a 900 block resting on a frictionless surface it
the four tires of an automobile areinflated to a gauge pressure of 20 x 105 pa each tire has an area of 0021 m2 in
1 the magnitude of the force the sun exerts on uranus is 141x1021 newtons explain how it is possible for the sun to
a resistor is made of a material that has a resistivity that is proportional to the current going through it if ithe
an asteroid hits the moon and ejects a large rock from its surface the rock has enough speed to ravel to a point
a satellite is placed in a noncircular orbit about the earth the farthest point of its orbit apogee is 4 earth radii