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A wrecking ball (weight = 4620 N) is supported by a boom, which may be assumed to be uniform and has a weight of 2510 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32°, and the angle between the boom and the horizontal is 48°. Find (a) the tension in the support cable and (b) the magnitude of the force exerted on the lower end of the boom by the hinge at point P.
When an electric circuit is being assembled, a common practice is to twist together two wires carrying equal currents in opposite direction
A uniform electric field exists in a region between two oppositely charged plates. What is the speed of the electron as it strikes the second plate
a science-fair radio uses a homemade capacitor made of two 35cm x 35cm sheets of aluminum foil separated by a
What is the electric potential difference between two points that are 3.00 cm and 5.00 cm from a proton
Two musicians are comparing their clarinets. The first clarinet produces a tone that is known to be 442Hz, If the second clarinet produces a higher pitched tone than the first clarinet, what is the second clarinet's frequency
The heating element of a clothes dryer has a resistance of12.7 Ohms. A voltage of 240 V is connected across the heatingelement. What is the current in the heating element?
Your roommate is working on his bicycle and has the bike upside down. He spins the 64 -diameter wheel, what is the pebble's speed and acceleration
How many watts must a fluorescent bulb (25% efficiency) use to produce the same amount of light as a 100-watt incandescent bulb, What would the power consumption be for an LED
Some rear view mirrors produce images of cars behind you that are smaller than they would be if the mirror were flat. What is the mirrors radius of curvature if cars 25.0 m away appear 0.33 times their normal size?
An electron is a subatomic particle (m = 9.11 10-31 kg) that is subject to electric forces. Find the magnitudes of the net force acting on the electron
A converging lens with a focal length of 17.9 cm and a diverging lens are placed 26.0 cm apart, with the converging lens on the left. What is the height of the final image
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.36 102 m/s from the top of a cliff 162 m above level ground, obtain the initial total mechanical energy of the projectile
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