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A ball is thrown down vertically with an initial speed of 22 ft/s from a height of 34 ft.
(a) What is its speed (in ft/s) just before it strikes the ground?
(b) How long does the ball take to reach the ground?
(c) part a and (d) part b if the ball were thrown upward from the same height and with the same initial speed ? Before solving any equations, decide whether the answers to (c) and (d) should be greater than, less than, or the same as in (a) and (b).
The boom in the crane is free to pivot about point P and is supported by the cable that joins halfway along its 18 m length. the cable passes over a pulley and is anchored at the back of crane. the boom has a mass of 1700 kg, distributed evenly an..
Consider a 7 solar mass main sequence star, Estimate its luminosity in solar luminosities and how long (in years) it could maintain its luminosity through gravitational collapse
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Visible light (wavelength 400 - 700 nm) passes through a diffraction grating with 5000 lines/cm and illuminates a wall 5.0 m away. How wide (linear distance) is this order spectrum on the wall
In order to drop a Pyrex glass marble 1.003 in diameter through the hole in the plate, how much must the temperature of the system be raised
Wile. E. Cayote runs full-speed into a bank vault just as the door is closing. What was the doors angular speed right before the collision
Two automobiles, each of mass 1.500*10^3 kg, travel in the same direction along a straight road. find the translational kinetic energy of the center of mass
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Charges of 3.0 nC, -2.0 nC, -7.0 nC, and 1.0 nC are contained inside a rectangular box with length 1.0 m, width 2.0 m, What is the electric flux through the surface of the box
we can assume that the arm moves with constant speed during each swing. Illustrate what is the acceleration of a 1.3g drop of blood in the fingertips at the bottom of the swing?
An alpha particle (q=2e m=4m) exists in a region where the electric field is E=14,000 N/C, find the acceleration of the alpha particle if it is released
Three capacitors are connected in series. The equivalent capacitance of this combination is 2.70 ?F. Two of the individual capacitances are 6.70 ?F and 8.30 ?F. What is the third capacitance (in ?F)?
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