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The headlights of a moving car require about 10 A from the l2 V alternator, which is driven by the engine. Assume the alternator is 80% efficient (its output electrical power is 80% of its input mechanical power), and calculate the horsepower the engine must supply to run the lights.
a neutron in a reactor makes and elastic head-on collision with a carbon atom at rest. the mass of the carbon atom is
A large tank is filled with methane gas at a concentration of 0.690 kg/m3. The valve of a 2.00-m pipe connecting the tank to the atmosphere is inadvertantly left open for 11.0 hours. determine the cross-sectional area of the pipe
in what way is the npv consistent with the principle of shareholder wealth maximization? what happens to the value of a
A 2000 kg car traveling at a speed of 23m/s skids to the halt on wet concrete where = 0.60. How long are the skid marks.
Two balls of identical mass of 1.152 kg and with identical charges placed on them hang from the ceiling on identical strings of lengths 1.310 m. If the angle with respect to the vertical that the strings form is 24.5 degrees.
A car of mass 1,250 kg is lowered onto a junk pile at the end of the cable of a large crane. If the car is accelerating downward at 0.19 m/s2
A sky-diver jumps out of a plane and achives (terminal velocity) before opening his parachute.Explain what is meant by the term terminal velocity,why it occurs and what value of velocity a typical sky diver might experience.
A girl is floating in a freshwater lake with her head just above the water. If she weighs 610 N, what is the volume of the submerged part of her body?
An iron brick measuring 200 mm / 20 cm / 0.05 m is submerged in pure water. (mass density 7860 kg/m^3/ weight 490 lb/ft/ specific gravity 7.86), What is the net force on the brick
A winch is used to drag a 300 N crate up a ramp at a constant speed of 68.0 cm/s by means of a rope that pulls parallel to the surface of the ramp. If the rope were suddenly to snap, what would be the acceleration of the crate immediately after the..
A cylindrical copper rod of length 2.2 m and a cross-sectional area 5.0cm^2 is insulated to prevent heat loss through its surface. At what rate is energy conducted along the rod
An oil droplet with 13.0 excess electrons is observed between two parallel electrodes spaced 11.0mm apart. What is the radius of the droplet
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