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a galaxy cluster in ursa major has a recessional velocity of 15000 kms using 73 kmsmpc for hubbles constant find the
how much electrical energy is needed to heat the water in a hot water heater with a capacity of 40 gallons from 60degf
calculate the overall efficiency to produce light in a fluorescent lamp from electrical energy derived from a nearby
anbsp40-kg child runs at 8 msa calculate the childs kinetic energyb if the child could convert all of the kinetic
an antacid tablet weighing 0949 g contained calcium carbonate as the active ingredient in addition to an inert binder
a record on a turn table rotates with initial speed 35 rads making three turns before stopping a what is its angular
an engine takes 5 seconds to go from its idling speed of 600 revmin to 1200 revmin a what is its angular acceleration b
a vinyl record 30cm in diameter turns through an angle of 200 degrees how far does a point on the edge of the record
a power plant is designed to generate 80 mw of work 980x106nbspjs the plant is powered by steam at 765k with the
what is the efficiency of an engine that has 2200 j of heat added during combustion and loses 1000 j of heat in the
you walk on level ground 05 km east then 2400 m south and then climbs to the top of a building that is 1850 m tall what
a 840 kg girl lowers herself to the ground from a height of 86 m by holding onto a rope running over a pulley to a 300
pilots and astronauts are tested for the stresses of flying high-speed aircraft in a spinning human centrifuge a device
the coefficient of friction kinetic between a rubber tire and a wet concrete road is 05 a find the minimum time in
an object of mass m1 and velocity v1 undergoes an elastic head on collision with another object of mass m2 that is rest
a 50 kg box is suspended by a rope from the ceiling if a horizontal force of 20 lb is applied to the box what angle
kevin joe and nick are studying for their physics exam but they are very confused about momentum conservation a reading
your moving car contains a lot of energy as kinetic energy - energy of motionif your car is not a hybrid when you stop
what maximum output would you expect from a wind turbine with a blade of radius 15 ft in a 25 mph wind please type out
suppose that 40 grams of a radioactive isotope is discovered to have 125 grams remaining after 24 hours what is the
a speeding motorist traveling at 1260 kmhr passes a stationary police officer at the instant the motorist passes the
a scientist wants to model an internal organ with connective tissue as a mass on a spring the mass of the organ is 20
can a step-up transformer be used as a step down transformer in a circuit what are the safety concerns with
a football is thrown with a velocity of 10 ms at an angle of 30 degrees above horizontal how far away should the
a 10 kg iron ball rolling at 2 ms on a horizontal surface strikes a 1 kg wood ball of the same size which was at rest