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A diathermy machine, used in physiotherapy, generates electro magnetic radiation that gives the effect of "deep heat" when absorbed in tissue. One assigned frequency for diathermy is915.00 MHz. What is the wavelength of this radiation?
At an altitude of 260 m above the Earth's surface, the field is only 105 N/C. Calculate the charge density of the air (assumed constant).
a sealed metal container contains a gas at 20 degrees celsius and 1 atm. to what temperature must the gas be heated to
Two astronauts, each having a mass M, are connected by a rope of length d having negligible mass. They are isolated in space, orbiting their center of mass at speeds v. What is the new rotational energy of the system
question a sinusoidal voltage having a maximum amplitude of 625 v is applied to the terminals of a 50 ohm resistor.
Suppose he enters the water at a speed of 16.0 m/s via path 1. Explain how fast is he moving on path 2 when he releases the rope at a height of 4.00 m above the water? Ignore the effects of air resistance.
Three charges, each of magnitude 9 nC, are at separate corners of a square of edge length 4 cm. The two charges at opposite corners are positive, and the other charge is negative.
an arbituary shape of copper holds excess charge that is in static equilibrium. In which direction does the electric field, created by the excess charge, point at an exterior portion of the copper chape
A 50 Newton horizontal force pushes a 10 kilogram mass sitting on a horizontal surface towards the right. What is the acceleration of the mass and its direction
A block of wood weighing 2N slides down a 37^0 inclined plane starting from rest and reaching 2 m/s. What is the kinetic coefficient of friction between the block and slide
A wire loop of radius 0.3 m lies so that an external magnetic field of magnitude 0.30T is perpendicular to the loop. The filed reverses its direction, and its magnitude changes to 0.20T in 1.5s. Find out the magnitude of the average induced emf in..
The company adheres to a 60% dividend payout ratio and has a P/E ratio of 19. There are 21,000 shares of stock outstanding. Illustrate what is the amount of the annual net income for the firm?
A film of MgF2 (n = 1.38) having thickness 1.68 10-5 cm is used to coat a camera lens, What are the three longest wavelengths that are intensified in the reflected light
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