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An infinitely long line of charge has linear charge density 5.00 x10-12 C/m. A proton (mass 1.67 x10-27 kg, charge +1.60 x10-19 C) is 18 cm from the line and moving directly toward the line at 1.50 x103 m/s. How close does the proton get to the li..
The loaded cab of an elevator has a mass of 3.0 x10^3 kg and moves 157m up the shaft in 23s at constant speed. At what average rate does force from the cable do work on the cab.
A 10000 kg boxcar traveling at 20 m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 11 m/s. What is the mass of second car.
What centripetal force does an 80-kg passenger experience when seated 12 m from the center of the Ferris wheel whose angular speed is 0.50 rad/s.
Find out the magnitude of its average acceleration between those points. Find the direction of its average acceleration between those points.
What minimum heat is needed to bring 230g of water at 20 degrees C to the boiling point and completely boil it away.
A wooden raft has a mass of 45 kg. When empty it floats in water (density 1000 kg/m3) with 68% of its volume submerged. What mass of sand could be put on the raft without it sinking.
A coil with resistance 0.05( and self-inductance 0.01H is connected across a 12-volt battery of negligible internal resistance. a) How long after the switch is closed will the current reach 95% of its final value.
A 35-mm slide (picture size is actually 24 by 36 {mm) is to be projected on a screen 2.10 m by 3.15 m placed 5.30 m from the projector. What focal-length lens should be used if the image is to cover the screen? Answer to be in mm please.
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.5 m/s2. How far does the car go before it stops.
A map of a burned area obtained from remote sensing contains 120 pixels. The remote sensing image shows that the fire is isolated to 73 of the 120 pixels.
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