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a catapult launches a rock towards a hill 500m away. the rock lands on the hill 20m above the release point of the rock. if the rock was launched at an angle of 30 degrees above the horizontal.
a) find the time the rock is in air.
b) initial total velocity of the ball.
c) the max height of the rock during flight.
Light known to be polarized in the horizontal direction is incident on a polarizing sheet. What angles does the transmission axis of the sheet make with the horizontal
Constructive interference occurs when a soap bubble reflects light of wavelength 430 nm. What is the minimum thickness of the bubble
An object of mass 2.5 kg on a table is connected to a hanging object of mass 11.2 kg by means of a string via a pulley. Caculate the acceleration of the system
What is the magnitude of net force causing the acceleration.
You hike 2/3 of the way to the top of the hill at a speed of 3.5 miles per H and run the final third at a speed of 5.6 miles per H
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A uniform ladder 15 ft long is leaning against a frictionless wall at an angle of 56° above the horizontal. The weight of the ladder is 35 pounds. A 77 lb boy climbs 6.0 ft up the ladder. What is the magnitude of the friction force exerted on the lad..
A high diver leaves the end of a 5-m-high diving board, and strikes the water 1.3 s later, 3 m beyond the end of the board. determine the velocity with which she enters the water
What is the magnitude of the force on the bead. find the charge of the particle.
questiona girl of mass mg is standing on a plank of mass mp. both are initially at rest on a frozen lake that
A 10 kg runaway grocery cart runs into a spring with spring constant 240N/m and compresses it by 65cm. What was the speed of the cart just before it hit the spring.
A truck driver is broadcasting at a frequency of 33.103 MHz with a CB (citizen's band) radio. Determine the wavelength of the electromagnetic wave
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