Algebra based physics

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The mobile in Fig 9—90 is in equilibrium Object B has mass of 0 748 kg Determine the masses of objects A. C. and D (Neglect the weights of the crossbars). ...
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If a car moving at 15m/s skids to a stop after 20m, how far will it take skid moving at 45m/s? assume braking force is constant ...
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I'm 17 and a junior in a college prep/charter/independent study school and I do pretty good in all of my classes besides math. I used to be 'home schooled' but my mom quit teaching me in about 3rd or 4th grade do to her drug addiction,so when i got flung in high school there wa...
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In Olympic platform diving, the athletes dive from a platform that is 42 feetabove the water. A diver leaves the platform with an initial vertical velocity of 4feet per second. ...
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A 50 g body hangs vertically at the end of a string. A horizontal force of 20 g pulls the body. What is the tension of the string? Solve graphically. Draw forces to scale. ...
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A boat which has a speed of 12 mph while traveling in still water, heads directly down a river, which has a current of 7 mph. what will be the speed of this boat relative to an observer along the bank of the river? ...
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A girl delivering newspapers covers her route by traveling three blocks west, four blocks nothe then six blocks east. what is her resultant displacement and what is the total distant traveled ...
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A speedboat increases in speed from 21.5 m/s to 27.9 m/s in a distance 223 m. Find the magnitude of its acceleration. Answer in units of m/s2. A projectile is fired straight up at a speed of 15 m/s. How long does it take to reach the top of its motion? The acceleration of gravity is 9.8 m/...
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I don't understand how to solve these, so I would really appreciate it if you showed the work along with the answers and the conversions. Thank you very much! 1. You see a lightening bolt in the sky. You hear a clap of thunder 3 seconds later. Sound travels at a speed of 330 m/s. Assuming you se...
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The largest ruby in the world is 10.9 cm long, 9.10 cm wide, and 5.80 cm thick, giving it an overall volume of 575 cubic cm. If the density of ruby- a form of aluminum oxide- is 3.97 grams per cubic cm, what is the mass of the largest ruby? ...

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