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1. In the experiment, if the accelerating voltage is 300 V and the radius of the beam path is 3.2 cm, what is the:
- speed of the electron?
- magnitude of the magnetic induction?
- centripetal force on a single electron?
- Lorentz force on a single electron?
- current required in a pair of Helmholtz coils of radius 15 cm?
A laser used to weld detached retinas emits light with a wavelength of 654nm in pulses that are 20.2ms in duration. How much energy is in each pulse
Battery-powered electricity is very expensive compared with that available from a wall receptacle. Estimate the cost per kWh of an alkaline D-cell
A mountaineer uses a global positioning system receiver to measure his displacement from base camp to the top of Mount McKinley, what is the displacement in going from base camp to the top
A student (m= 75 kg) falls freely from rest and strikes the ground. throughout the collision with ground, he comes to rest in a time of 0.040 s. the average force exerted on him by the ground is +18 000 N.
A solid sphere with mass m = 1.5 kg a radius r = 0.20 m rolls without slipping on a flat surface with an angular velocity of ? = 7.2 rad/s. What is the total kinetic energy of the sphere
For this experiment you will require a stand, string, a paper or plastic cup, a nail, a roll of paper towels or similar sized paper, coloured sand, or some other dry powdery product, and a ruler or measuring tape.
Froima plotted graph a student determined that the best fit line had a slope of 1.227m/s^2 and a y-interecept of 0.32m/s. Determine the uncertainty for the slop of the line
Two positive point charges are a fixed distance apart. The sum of their charges is QT. What charge should each have in order to (a) maximize an electric force between them, and (b) minimize it.
A 9.22 kg ball, hanging from the ceiling by the light wire 145.00 cm long, is struck in an elastic collision by a 1.20 kg ball moving horizontally at 6.46 m/s just before the collision.
A wire of length L = 15 is bent into a semi circle . If the total charge on the wire is -45nC, determine the electric field at the center point of the semicirlce.
In the Soapbox Derby, young participants build non-motorized cars with very low-friction wheels, What is the maximum possible acceleration of a car moving down this stretch of track
Let's build a helium atom. Start with a nucleus with 2 protons and 2 neutrons, Calculate the energy gained by the system constructing this atom
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