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three resistors r1 120 r2 180 and r3 360 are connected in parallel and in turn connected to a 700 v source with
an air-filled parallel-plate capacitor has plates of area 260 cm2 separated by 250 mm the capacitor is connected to a
suzie of mass 68 kg is roller-blading down the sidewalk going 48 miles per hour she notices a group of workers down the
consider a container insulated from the environment and divided into two sections by a very thin stiff membrane with n1
a nuclear power plant generates 2000 mw of heat energy from nuclear reactions in the reactors core this energy is used
the hot-reservoir temperature of a carnot engine with 270 efficiency is 900 degrees c higher than the cold-reservoir
there has long been an interest in using the vast quantities of thermal energy in the oceans to run heat engines a heat
a curve of radius 526 m is banked so that a car of mass 16 mg traveling with uniform speed 55 kmhr can round the curve
a carnot heat engine takes 89 cycles to lift a 15 kg mass a height of 15 m the engine exhausts 16j of heat per cycle to
a cylindrical section of a tree trunk 50 cm in diameter and 75 cm long is seen rolling down a road below a sawmill at a
a rocket blasts off and moves straight upward from the launch pad with a constant acceleration after 30 seconds the
the two charges in the figure above are separated by a distance d 500 cm and q 570 nca find the electric potential at
a vector a has a magnitude of 400 m and points in a direction 200 degrees below the positive x axis a second vector b
a hot-air balloon is rising straight up with a speed of 3 ms a ballast bag is released from rest relative to the
an 750-n crate of apples sits at rest on a ramp that runs from the ground to the bed of a truck the ramp is inclined at
at t 0 an automobile traveling north begins to make a turn it follows one-quarter of the arc of a circle of radius 111
two spheres with uniform surface charge density first with a radius of 75cm and the second with a radius of 45cm are
a train is traveling at 29 ms relative to the earth in the positive x-direction a passenger standing on the train
a train is traveling with a speed of 160 ms relative to earth a passenger standing at the rear of the train pitches a
suppose a rocket-propelled motorcycle is fired from rest horizontally across a canyon 130 km widea what minimum
you are a construction worker standing still on 12th ave n in fargo and you watch a minivan drive past at 25 mihr
a boat with a speed of 10 ms in still water tries to cross a river with a current flow 20 ms and is a 100 meeters wide
if a bullet that leaves the muzzle of a gun at 299 ms is to hit a target 810 m away at the level of the muzzle the gun
assume you are a medieval knight attacking a castle with a cannon the cannonball leaves the cannon with a speed of 353
a cargo plane is flying horizontally at an altitude of 200 km with a speed of 888 kmh when a large crate falls out of