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A radio station broadcasts at a frequency of 1MHz with a total radiated power of 5000 watts.
(a) What is the wavelength of this radiation?
(b) What is the energy (in electron-volts) of the individual quanta that compose the radiation? How many photons are emitted per second? per cycle of oscillation?
(c) A certain radio receiver must have 2 microwatts of radiation power incident on its antenna in order to provide intelligible reception. How many 1MHz photons does this require per second per cycle of oscillation?
(d) Do your answers to parts (b) and (c) indicate that the granularity of electromagnetic radiation can be neglected in these circumstances?
a football quarterback throws a pass at an angle of 30.5deg. he releases the pass 3.50 m behind the line of scrimmage.
A 0.62 kg glider slides frictionlessly on an 3-m air track inclined at an angle of 12 degrees. The glider is connected to a lightweight string which passes over a low-friction pulley at the top of the air track. The other end of the string is conn..
How large a pressure in pascals would be required to compress water by 10 percent? How high a column of water (in kilometers) would be needed to furnish this pressure?
A 1.00 m 3 container of air absorbs 5857 J of heat at a constant pressure of 1.00 atm. Air has a density of 1.20 kg/m 3, a constant-pressure specific heat of 10*10 J/(kg·°C), and a thermal coefficient of expansion of 3.67 X10-3 (°C)-1.
A wire rests on the y axis and has 3 A of current flowing in the y direction. Compute the force (in i j k notation) on a 10 cm section of the wire if it sits in a magnetic field described by a) B= 0.28 T i, b) B = -0.68 T j, and c) B= -0.5 T i + 0.6 ..
A gas is enclosed in a container whose walls are made of a material that is flexible and which acts as a perfect insulator for all practical purposes. A thermal process takes place on the gas. What would be the best model for the kind of process?
A photon of energy 50 MeV moves along the x-axis and Comptonscatters with an electron initially at rest. After the collision theresulting photon is observed traveling along the y-axis and the electron hasrecoiled.
A cell membrane acts as a parallel-plate capacitor with a spacing of 13 nm and filled with water. Suppose the positive plate is on top, What is the capacitance of the membrane
A rocket with a mass of 2.9×10^6 kg has a relativistic kinetic energy of 2.5×10^23 J. How fast is the rocket moving
A concave mirror (R = 56.0 cm) is used to project a transparent slide onto a wall. How far from the wall should the mirror be located
A particle, starting from point A in the drawing(the height at A is 3.00 m), is projected down the curved runway.Upon leaving the runway at point B, the particle is traveling straight upward and reaches a height of 4.44 above the floor beforefalling ..
A U-shaped pipe contains water and oil - water filling one arm of the U and oil filling the other. determine the density of the oil
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