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Aircraft equipped with powerful radar units are forbidden from turning them on when on the ground near people. Explain why this is so.
q1. how many 104 w lightbulbs can you use in a 102 v circuit without tripping a 17 a circuit breaker? the bulbs are
a 98-g piece of copper is heated in a furnace to a temperature tc. the copper is then inserted into a 150-g copper
A tetherball leans against the smooth, frictionless post to which it is attached. What is the force the pole exerts on the ball
A dab of mud (mass 0.1 kg, and sitting 0.25 m from the center) flies off a horizontal spinning wheel when the wheel takes 1 s to complete one circuit. How large is the friction force between the mud and the wheel?
A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.00 atm at 20.0oC. What is the mass of this piston
The tungsten filament in an incandescent light bulb has a resistance of 1.5 ohm when the bulb is not turned on at 20°C. What is the operating temperature of the filament
On an old-fashioned rotating piano stool, a woman sits holding a pair of dumbbells at a distance of 0.555 m from the axis of rotation of the stool. What is the angular velocity of the system after the dumbbells are pulled in toward the axis
How many revolutions does the ball make during its fall. Now assume that the ramp is frictionless, so that the ball slides instead of rolling. Through what horizontal distance d does the ball move before landing in this case.
The springs of a 1700-kg car compress 4.90mm when its 63.0-kg driver gets into the driver's seat. If the car goes over a bump
A 7.00 g bullet, when fired from a gun into a 1.00 kg block of wood held in a vise, penetrates the block to a depth of 8.00 cm. To what depth will the bullet penetrate the block in this case
A satellite of mass 190 kg is placed into Earth orbit at a height of 400 km above the surface. how long does the satellite take to complete one orbit
An electron is confined inside a potential well with infinite walls. The width of the well is W = 5 nm. What is the probability of finding a electron within 1 nm from either wall
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