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A 150-N crate is being pulled up a perfectly smooth ramp that slopes upward at 15° by a pull that is directed at 30° above the surface of the ramp. What is the magnitude of the pull required to make the crate move up the ramp at a constant velocity of 1.75 m/s?
At depths greater than 2 meters in Kansas, the wintertime soil temperature is approximately 15 degrees C. Determine the coefficient of performance
a cart starts from rest at the top of the tilted track. assume the track is frictionless. the cart passes photogate a
q1. a 1000kg experimental rocket sled at rest on level frictionless rails is loaded with 50kg of propellant. it
A 3kg object moving in the positive x direction has a one-dimensional elastic collision with a 5kg object initially at rest. What was the initial speed of the 3kg object
A sample of the radioactive nuclide is prepared that has an initial activity of 7.28×1011 .92.4 after the sample is prepared, What is the half-life of this nuclide
explosives are used to blow a rock apart. the explosion blows the rock into three fragments. two fragments go off at a
A mass M = 25.0 kg is suspended by a massless string from the ceiling of a van which is moving with constant acceleration a, what is the acceleration a of the van
A string on a musical instrument is held under tension T and extends from the point x = 0 to the point x = L. The string is overwound with wire in such a way that its mass per unit length µ(x) increases uniformly from µ0 at x = 0 to µL at x = L.
A 4.94-g bullet is shot through a 0.99-kg wood blocksuspended on a string 2.00 m long. The center of mass of the blockrises a distance of 0.50 cm. Find the speed of the bullet as itemerges from the block if its initial speed is 393 m/s.
Gasoline contains predominately octane (the "octane" value quoted on the pump is approximately equal to the percent of octane in the gasoline).
The figure shows an object and its image formed by a thin lens. Assume that L=15.0 cm and y=3.25mm. what is the focal length of the lens? what is the height of the image?
First, find the location of the image created by the lens by itself (as if no other instruments were present). Express your answer in meters, to three significant figures, or as a fraction. Next, find the location of the image created by the mirror (..
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