What is the magnitude of the charges
Two identical positive charges separated by 12.5 cm exert a repulsive force of 1.24 N on each other what is the magnitude of the charges?
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Two Polaroids are aligned so that the light passing through them is a maximum. At what angle should one of them be placed so that the intensity is subsequently reduced by 50 percent?
A city's water supply is fluoridated by adding NaF.The desired concentration of F- is 1.6ppm.How many milligrams of Naf should be added per gallon of treated water if the water supply is 0.2 ppm in F-?
Sam, whose mass is 61.0 kg, takes off down a 49.0 m high, 9.00^circ slope on his jet-powered skis. The skis have a thrust of 180 N. Sam's speed at the bottom is 45.0 {rm m/s}. What is the coefficient of kinetic friction of his skis on snow?
Snow begins to fall vertically and fills the car at a rate of 3.50 kg per minute. Ignoring friction with the tracks, what is the speed of the car after 86.4 minutes?"
A car of mass M = 1200 kg traveling at 55.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires. What is the radius r of the turn if theta = 20.0 (assum
An insulated Thermos contains 119 cm3 of hot coffee at 64 °C. You put a 12.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as
A proton in a uniform electric field of 3.0 X 105 N/C is moving with an initial speed of 800,000 m/s in the direction direction opposite the direction of the field.
Marianne puts her favorite Backstreets Boys disc in her CD player. If it spins with a frequency of1800 revolutions per minute, what is the period of spin of the compact disc?
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