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An electron with kinetic energy 2.10 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 23.0 cm. Find the speed of the electron. Find the magnetic field. Find the frequency of circling. (Hz) Find the period of the motion.
What is an average speed
A bicyclist rides 3.19 km due east, while the resistive force from the air has a magnitude of 8.83 N and points due west. Find the work done by the resistive force during the round trip
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 46.0 cm. What is the value of the acceleration of gravity on this planet
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +8q. Sphere B carries a charge of -q. Sphere C carries no net charge. Spheres A and B are touched together and then separated.
The specific heat of ice to is 2100 and the heat of fusion for ice is . How much time passes before ice starts to melt? From the time while the heating begins, how much time does it take before the temperature begins to rise above 0.
A series of equipotential lines are shown right. Points A- D are shown, An electron travels from A to B, and then to C, and then to D. What is the work done on the electron by the field, as measured in eV
Starting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric field at the center of the square array of charges
100g of ice at -10C is placed into 100g of warm water in an insulated container. Calculate the mass of the ice that remains when equilibrium is achieved
If 80g of ice at -20 oC is placed in 200g of water at 15 oC, how much ice melts, The specific heat of ice is 0.5 cal/g-K
An astronaut accidentally gets separated out of his small spaceship accelerating in inter stellar space at a constant rate of 100 m s-2. What is the acceleration of the astronaut the instant after he is outside the spaceship ? (Assume that there a..
Two cars start from rest from point A on a circular track of radius r=200 m. Find the angular acceleration of the blue car in rad/sec^2
David is driving a steady 31.0m/s when he passes Tina, who is sitting in her car at rest. How far does Tina drive before passing David
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