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Q1. A box of books weighing 352 N moves with a constant velocity across the floor when it is pushed with a force of 448 N exerted downward at an angle of 30.7? below the horizontal.
Find μk between box and floor.
Q2. Find out the object position p for the image to be erect and 7 times the size of the object. Focal length is 46 cm
Q3. A 12.0-kg crate slides along a horizontal frictionless surface at a constant speed of 4.0m/s. the crate then slides down a frictionless incline and across a second horizontal surface. What is the speed of crate when it arrives at the lower surface, what is the kinetic energy of the crate as it slides on the lower surface, and what minimum coefficient of kinetic friction is necessary to bring crate to a stop over a distance of 9.0m along the lower surface?
Find the force exerted by the plane on the pilot
The rock strikes the ground a horizontal distance of 44 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How long did the rock take to hit the ground? Give your answer in seconds to two d..
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Potassium iodide has an interplanar spacing of d = 0.296 nm. A monochromatic X-ray beam shows first-order diffraction maximum while the grazing angle is 7.8°. Compute the X-ray wavelength λ .
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