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An electron enters a region of space containing a uniform 0.0000199-T magnetic field. Its speed is 199 m/s and it enters perpendicularly to the field. As you know, the electron undergoes circular motion under these conditions. Find the radius of the electron's orbit, r, and the frequency of the motion, f.
r = ______________ m
f = _____________ Hz
If the mass of the diver is 84 kg and the board is 1.5 m long, illustrate what is the magnitude of the torque due to gravity on the diving board with a pivot point at the fixed end of the board?
A windmill has an initial angular momentum of 8270 kg · m2/s. The wind picks up, and 5.81 s later the windmill's angular momentum is 9310 kg · m2/s
A system does 167 J of work on its environment and gains 85.5 J of heat in the process, Find the change in the internal energy of the environment
Suppose two highly precise, identical clocks are synchornized and one clock is placed at the North Pole and one clock is placed at the equator. After 100 years, how much time will the clocks differ in time
If the mass of the child and sled is 40 {rm kg}, what average force do you need to apply to stop the sled? Use the concepts of impulse and momentum.
A 5.29-kg ball hangs from the top of a vertical pole by a 2.09-m-long string. Calculate the angle, between 0° and 90°, that the string makes with the pole
A garden hose is attached to a water faucet on one end and a spray nozzle on the other end. What is the pressure inside the hose
A spherical Christmas tree ornament is 3.84 cm in diameter. What is the magnification of the image of an object placed 11.1 cm away from the ornament
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. compute the final magnification of the microscope
A ball thrown horizontally at 30m/s travels a horizontal distance of 44m before hitting the ground. From what height was the ball thrown
Suppose one gallon of gasoline produces 1.1 108 J of energy, and this energy is sufficient to operate a car for 16 miles. how many miles would the car go on a single tablet
A 25.1-mW laser beam of diameter 2.15 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
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