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A ball of mass 50g tied to the end of a 50cm inextensible string is whirled around in a vertical circle. Find the tension in the string when the ball is at the top of the circle. Take g=10ms2.
Green laser light with a wavelength of 521 nm strikes adifraction grating with 3000 lines/cm. How many spots appear on the screen
What diameter must a copper wire have if its resistance is to be the same as that of an equal length of aluminum wire with diameter 3.22mm
Five seconds later, the police officer leaves on her motorcycle, starts her stopwatch, and accelerates at 2 m/s^2 toward the car. According to her stopwatch, how many seconds until she catches the car
A cat stands on a board of wood in a frozen frictionless pond. The mass of the cat is 4.0 kg, and the mass of the board is 3.0 kg. how far does the cat move in relation to the pond
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 4.80x10-2 kg/s. The density of the gasoline is 737 kg/m3, and the radius of the fuel line is 2.18x10-3 m. What is the speed at which gasoline moves through the fuel line?
Two narrow paralle slits illuminated by tellow light with a wavelength of \lambda = 600 nm produce fringes with a separation of 0.50 mm on a screen 2m away,
A baseball player leads off the game and hits a long home run. How far will it travel in the air
A disk spinning with angular velocity , w=12 rad/s slows down to a stop in 4 seconds. What is the angular displacement delta theta
A 32-lb block is attached to a cord that is wrapped around the rim of a flywheel of diameter 1 ft and hangs vertically, as shown. The rotational inertia of the flywheel is 0.5 slug × ft2. When the block is released and the cord unwinds, the accelerat..
What is meant by the term "balanced bridge"? What advantage is there in using a null-measurement (A.K.A)a difference measurement method like the Wheatstone Bridge insteadthan a method where Rx is calculated based upon meter readings forthe current..
a a football player kicks a football in a field goal attempt. when the football reaches its maximum height what is the
A given copper wire has a resistance of 5.11 ? at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.61 ? at 20.0°C
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