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Two billiard balls of equal mass undergo a perfectly elastic head-on collision.If one ball's initial speed was 1.80m/s , and the other's was 5.00m/s in the opposite direction, what will be their speeds after the collision?
A wooden board that is 50 cm long, 20 cm long, and 4 cm thick is floating in water. Rocks are then carefully placed on the top face of the board until the top of the wood just slips below the water surface. The density of water is 1000 kg/m^3 and ..
A proton travels with a speed of 3.00 ? 106 m/s at an angle of 55.0° with the direction of a magnetic field of 0.520 T in the +y direction. determine the magnitude of the magnetic force on the proton
Two point charges 3.0cm apart have an electric potential energy -130?J, find the lesser and greater charge
You wrap a single layer of copper wire (diameter .812mm) around a tube (diameter 4cm length 28cm) to create an air filled solenoid. how many turns are there per centimeter
a thin gold ring of radius 1.02 cm carries a uniform charge per unit length of 1.02e-14 cm. find the electric field on
A man stands on the roof of a 19.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 42.0 above the horizontal. find the max height above the roof reached by the rock
A drop of water on a countertop reflects light from a flowerheld 3.5 cm directly above it. The flower's diameter is 2.5 cm, andthe diameter of the flower's image is 0.20 cm. What is the focallength of the water drop, assuming that it may be treate..
Dolphins emit ultrasonic waves with a frequency as high as 2.5 105 Hz. What is the wavelength of such a wave in seawater at 25° C
A capacitor has parallel plates of area 12 cm2 separated by 4.5mm . The space between the plates is filled with polystyrene, Find the induced surface-charge density on the surface of the dielectric
A pickup truck has a wheelbase of 3.00 m. Ordinarily, 10,780 N rests on the frontwheels and 8820 N on the rear wheels when the truck is parked on alevel road. How much total weight now rests on the rear wheels
The water level in a vertical glass tube 1.300 m long can be adjusted to any position in the tube. What is the greatest depth of water for which there will be resonance in the air in the tube
A pair of closely spaced square conducting plates measure12 cm on a side. The electric field energydensity between the plates is 4.3kJ/m3. What is the charge on the plates?
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