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1. A hair drier uses 14 A at 121V. It is used with a transformer in England, where the line voltage is 231 V. What should be the ratio of the turns of the transformer (primary to secondary)?
2. What current will it draw from the 231 V line?
An atomic nucleus of mass m traveling withthe speed v collides elastically with a target particle of 3m(initially at rest) and is scattered at 90 degrees. What are the final speeds of the two particles
Two identical spheres each carry a charge of -40.0 µC. The spheres are separated by a distance of 1.00 m. What is the electric force between the spheres
Illustrate what fractional increase in the tension of one wire lead to the occurrence of 6 beats/s when both wires oscillate simultaneously?
The cockroach's speed (relative to the ground) is 2.0 m/s, and the lazy Susan turns clockwise with angular velocity ω0 = 3.2 rad/s. The cockroach find out a bread crumb on the rim and, of course, stops.
A 1.23 x 103-kg car travels on a bumpy road at a constant speed of 25.0 m/s. What is the normal force on the car
Modern lasers can create a pulse of light that lasts only a few fem to seconds. What is the length of a pulse of violet light that lasts 6.0 fs?
a person exerts force of 35n on the end of an door 88 cm wide, what is the magnitude of torque if the force is exerted perpendicular to the door
A diver shines an underwater searchlight at the surface of a pond (n= 1.33). At what angle (relative to the surface) will the light be completely reflected?
A simple gear train is composed of three gears. Gear A os tje driver and has 8 teeth, gear B has 24 teeth, and gear C has 16 teeth. If gear A rotates at 60rpm, how fast is gear C rotating? If the output of torque at gear C is 150ft-lb, what is the in..
A 75 kg man jumps from an airplane. When his parachute deploys, it exerts a 500 N force on the man at an angle of 30 degrees with respect to vertical
a variable capacitor is connected in series to an inductor with negligible internal resistance and of inductance 4.25 x
The speed of a transverse wave on a string is 440 m/s, and the wavelength is 0.13 m. The amplitude of the wave is 1.6 mm. How much time is required for a particle of the string to move through a total distance of 1.0 km?
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