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michael drops a penny into a river from a bridge 44 m above the water another penny is thrown vertically down by his
1- a ball is hurled straight up at a speed of 150ms leaving the hand of the thrower 300 m above grounda compute the
a ball traveling with an initial momentum of 25 kg ms bounces off a wall and comes back in opposite direction with a
a deuterium nucleus mass 200 moving at 650 ms collides with a helium nucleus mass 400 moving at 480 ms in the opposite
during gym class a 50-kg teenager runs at 80 ms along the floor toward a rope hanging 78 m from the ceiling he grabs
a 79 kg ball that is originally 393 m above a spring is released from rest how far will the spring compress when the
a planet orbits a star once every 299 107 s in a nearly circular orbit of radius 151 1011 ma with respect to the star
in 97 s a fisherman winds 28 m of fishing line onto a reel whose radius is 30 cm assumed to be constant as an
a cannon has a barrel 5 m long and fires a 49 kg projectile with a muzzle velocity of 452 ms what is the average force
at a pressure of 1 atm the heat of vaporization of water is 22260000 jkg this is the heat required to convert 1 kg of
a heat engine absorbs 2400 j of heat from a hot reservoir and releases 1400 j of heat to a cold reservoir each second
in nuclear power plant the reactor produces steam at 518 celcius and the cooling tower eliminates waste heat into the
a parachutist of 60 kg descends at a constant speed of 44 ms what is the rate of increase of entropy of the parachute
calculate the fermi energy and fermi velocity for copper with 85 x 1028 conduction electrons per cubic metre use the
two people wish to push a big beer freezer weighing 2000 n up a ramp inclined at an angle of 370o with the horizontal
a subway train has three cars each weighing 120 x 105 n the frictional force on each car is 103 n and the first car
1 while driving at night your pupils dilate to 31mm diameter an oncoming car has two headlights spaced 15m apart if
1 a screen that is 10m wide is 20m away from a pair of slits illuminated by 633-nm light with the screen centered
a scientist is running at speed u toward a large smooth wall while holding a tuning fork that vibrates at frequency f
a box weighing 600 n is at rest on a ramp at an angle of 325o with the horizontal the coefficient of static friction
1 a railroad train is traveling at 30 ms the locomotive whistle emits a loud tone at frequency 440 hza what is the
it is desired that 55 microcoulomb of charge be stored on each plate of a 25 microf - capacitorwhat potential
a calculate the acceleration due to gravity on the moon the moons radius is a176x106 m and its mass is 753x1022 kgb
let 1 and 2 be the ground state and first excited state wave functions for a particle in a deep potential well of width
you were driving a car with velocity lsaquo 19 0 11 rsaquo ms you quickly turned and braked and your velocity became