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Q. A major league pitcher can throw a baseball in excess of 42.9 m/s. If a ball is thrown horizontally at this speed, how much will it drop by time it reaches the catcher who is 18 m away from the point of release?
Q. A proton orbits a long charged wire, making 2 times 10^ {6} revolutions per second. The radius of the orbit is 1.40 cm.
What is wire's linear charge density?
An insulated Thermos contains 210 cm3 of hot coffee at 88 °C. You put a 19.00 g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though..
How does the solar nebula theory describe the dramatic density difference between the terrestrial and Jovian planets.
Find out the relative rates at which clocks go at two different distances r1 and r2 from the center of the earth.
how long one electron to travel the full length of the cable.
At what point the electric potential zero. A sphere of mass 1.9 × 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 17° with the vertical. Find (a) the magnitude of that push a..
A rectangular barge, 4.0 m long and 1.5 m wide, floats in fresh water. (a) Find out how much deeper it floats when its load is a 380-kg horse. (b) If the barge can only be pushed 15 cm deeper into the water before water overflows to sink it, how m..
A 1050kg car carrying four 78kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes car to bounce on its spring suspension.
You work for a moving company and are given the job of moving two crates (masses are 130kg and 280kg) held together by a rope attached between the two. You pull on a rope attached to the larger crate giving the system the acceleration of 0.29m/s2. Wh..
what is the rate of heat transfer from the plate to the air? If the free stream velocity if the air is doubled and the pressure are increased to 10 atm, what is the rate of heat transfer.
In the meantime, the velocity of airplane Q relative to the air is 250 m/s in the direction of N 20o W. What is the speed of airplane Q relative to the airplane P.
A truck weighs four times as much as a car. if the truck coasts into the car at 12km/h and they stick together, what is their fimal velocity.
A parachutist with a camera, both descending at a velocity of 12 m/s, releases that camera at an altitude of 120 m.
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