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In attempting to jump start a car of mass 1100kg, two brotherseach push with an equal force of magnitude 670N parallel to thecar's velocity. The car moves at a constant speed of 2.8 m/sfor 55m, when it starts. The car is on a road that slopes downhillat 0.7 degrees with the horizontal.
Find the friction force that acts on the car.
A 95-kg fullback is running at 4.0 m/s to the east and isstopped in 0.75 s by a head-on tackle by a tackler running duewest. estimate the average force exerted on the tackler
what are the currents that the block can carry.
A rod flies with constant velocity past a mark which is stationary in the K frame. In the K frame, it takes the rod Deltat = 20 ns to fly pass the mark. In the K' frame fixed to the rod, the mark moves past the rod in Deltat' = 25 ns. Find (a) the ve..
While a certain rubber band is stretched a distance x, it exerts a restoring force of magnitude F=ax+bx^2, where a and b are constants. The work completed in stretching this rubber band from x=0 to x=L is what.
A circular coil enclosing an area of 96 cm2 is made of 199 turns of copper wire. The wire making up the coil has resistance of 3.0 , and the ends of the wire are linked to form a closed circuit.
Calculate the de Broglie wavelength for an alpha particle (He-e nucleus) with energy E = 4.2 GeV (which is emitted in the radioactive decay of U-238)
A golf ball is dropped from rest from a height of 9.50 m. It hits the pavement, then bounces back up, rising just 5.50 m before falling back down again. A boy then catches the ball when it is 1.30 m above the pavement. Ignoring air resistance, cal..
A strip of doped silicon 315 µm wide contains 9.0 1022 conduction electrons per cubic meter and an insignificant number of holes. What is the thickness of the strip
Suppose a tank contains 626 m3 of neon (Ne) at an absolute pressure of 1.01 105 Pa. The temperature is changed from 293.2 to 293.8 K. What is the increase in the internal energy of the neon
A plastic cylinder of length 36 cm its ends ground to convex (from the rod outward) spherical surfaces, each having radius of curvature 16 cm. How far will the image of the object lie from the right end
An electron is accelerated to a speed where its total energy is 229 times larger than its rest energy. What is the momentum of the electron measured in MeV/c units
A concave shaving mirror has a radius of curvature of 37.8 cm. In the mirror, the image of a pimple on your face is magnified +6 times what it actually is on your cheek
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