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a) The magnetic field of the Earth falls off as a magnetic dipole field. If the strength of the field at the Earth's surface is B = 3.8 x 10-5 Tesla, what is the strength one Earth radius above the Earth's surface?
b) The Sun's corona sends high energy protons and electrons towards the Earth (the Solar Wind). A typical solar wind proton has an energy of K=6.0 KeV (thousand electron volts). An eV (electron volt) is the kinetic energy an electron gains when it moves by ΔV = 1 Volt in an electric potential. Express the proton's energy in joules.
c) How fast is the proton moving? (You will need to look up the mass of the proton, in kilograms, online.)
d) What is the force on the proton from the Earth's magnetic field when it is 1 Earth radius above the Earth's surface? Assume the proton is moving at right angles to the Earth's field.
e) What is the radius of the cyclotron orbit the proton will make?
f) Compare the size of the cyclotron orbit to the distance from the Earth's surface. Does the Earth's magnetic field prevent the proton from flying to the Earth's surface?
A thick copper wire of length 10 m is observed to stretch 0.10 cm. What is the strain? If the applied force is 50,000 N, what is the diameter of the wire
a if a cylindrical wire with are a has a resistance r what would be its resistance when the area is doubled?b if a
in a potentiometer arrangement a cell of emf 1.25 v gives a balance point at 35.0 cm length of the wire. if the cell is
A hydrogen atom initially in the ground state absorbs a photon, which excites it to the n = 3.00 state. determine the frequency of the photon
A 58 ice cube can slide without friction up and down a 28 slope. The ice cube is pressed against a spring at the bottom of the slope, When the ice cube is released
A microwave oven operates with sinusoidal microwaves at a frequency of 2400 MHz. The height of the oven cavity is 25 cm, What is the amplitude of the electric field
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Assume a volleyball player claims a hang time of 1.25 seconds. Then that player must be able to jump a vertical distance of what.
A transformer has 100 turns in the primary with a voltage of 100V, and 200 turns in the secondary with a voltage os 200V. what will be the current in the secondary
An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction, Find the direction of the third force acting on the object
A ball (m=1kg) is dropped from a height of 3 m. Assume no air resistance. After it bounces off the ground it only reaches a height of 2 m. What is the balls change in energy
An ideal heat engine absorbs 98.6 kJ of heat and exhausts 81.6 kJ of heat in each cycle. How much work is done in a cycle
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