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a 120 kg mass is attached to a light cord that is wrapped around a pulley of radius 365 cm which turns with negligible
a woman once survived a fall of over six miles without a parachute when her plane exploded suppose a hapless individual
a 30 mc point charge sits at the center of a spherical thin metallic shell of 50 cm radius the shell has a charge of
a sphere of radius r starts from rest and rolls without slipping along a curved surface dropping through a vertical
a a lightweight electric car is powered by ten 12-v batteries at a speed of 70 kmh the average frictional force is 1050
a car with a total mass of 152 103 kg has wheels of radius 335 cm and moment of inertia 0835 kg middot m2a find the
a box of mass m is released from rest and slides down a 3 m high frictionless chute at the bottom is a motionless box
three uniform spheres are located at the corners of an equilateral triangle each side of the triangle has a length of
three blocks with masses m15kg m210kg and m37kg are connected by two pieces of very light strings the system is being
a 40 g block of ice is cooled to -78degc and is then added to 550 g of water in an 80 g copper calorimeter at a
a suppose that you have a 390 a 780 and a 220 k resistor what is the maximum resistance you can obtain by combining
a student sits on a swivel seat initially the student is at rest holding a spinning bicycle wheel that has an angular
a the electric starter in an automobile equipped with a 12 v battery draws a current of 9000 a when in operation
a 460 kg block of ice at 0degc is added to an insulated container partially filled with 106 kg of water at 150degca
the density of charge-carrying electrons in copper is 85 times 1028 electrons m3 its resistivity is 172 times 10-8
an object is placed 126 cm in front of the cornea the cornea is thin ans has approximately parallel sides so that the
a satellites are placed in a circular orbit that is 364 times 107 m above the surface of the earth what is the
the cheetah can reach a top speed of 114 kmh 71 mih while chasing its prey in a short sprint a cheetah starts from rest
a 47-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion
a train 350 m long is moving on a straight track with a speed of 848 kmh the engineer applies the brakes at a crossing
runner a is initially 30 mi west of a flagpole and is running with a constant velocity of 30 mih due east runner b is
a car starts from rest and travels for 50 s with a uniform acceleration of 23 ms2 the driver then applies the brakes
a major-league pitcher can throw a ball in excess of 415 ms if a ball is thrown horizontally at this speed how much
a large electromagnet draws a current of 26100 a at 31100 v the coils of the electromagnet are cooled by a flow of
a styrofoam box has a surface area of 079 m2 and a wall thickness of 20 cm the temperature of the inner surface is