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A packing crate is placed on a 20 degree inclined plane. If the coefficient of static friction between the plane and the crate is 0.65, Explain will the crate slide down the plan
A tennis ball is hit vertically upward with a speed of 21.0 m/s from the roof of an office building that is 275 feet above the ground. How long after being hit does the ball strike the ground? (Answer in seconds please)
A model rocket is fired vertically from rest. It has a net acceleration of 17.0 m/s2. How long after liftoff does the rocket return to the ground
Explain how the equation E = hf could mean that light is a particle and a wave at the same time.
A conducting wire is quadrupled in length and tripled in diameter. By what factor does its resistance change
Potential energy of a not obeing Hooke's law spring is given by the equation U(x)=5.00(J/m)x - 2.00(J/m3)x3, What is the expression for the restoring force of the spring
A converging lens has a focal length of 100.0 cm. A 12.0-cm-tall object is located 124.0 cm in front of this lens. find Is the image real or virtual
An 845-N sled is pulled a distance of 173 m. The task requires 1.20 x 10^4 J of work and is done by pulling on a rope with the force of 142 N. At what angle is the rope held.
Unpolarized light of intensity I_0 is incident on a stack of 7 polarizing filters, each with its axis rotated 15 (degrees) cw with respect to the previous filter. What light intensity emerges from the last filter
Two identical spaceships are traveling in the same direction. An observer on Earth measures the first to have speed 0.80c, What is the speed of the second spaceship
Two astronauts, each having a mass of 88.0 kg, are connected by a 10.0 m rope of negligible mass. What is the new rotational energy of the system
How long does it take for the grinding wheel to stop ? Through how many radians has the wheel turned during the interval found in.
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