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WPHY AM Radio transmits on a frequency of 970 kHz, omnidirectionally, with a power of 20 kW. What is its wavelength? You live 13 km from the station. What is WPHY's intensity where you live?
A 0.16-kg ball on a stick is whirled on a vertical circle at a constant speed. Find the tension in the stick
The speed of light in a certain substance is 93.1% of its value in water. For water, n = 1.33. What is the index of refraction of the substance
A student is sleeping under a small goose-down comforter that has coefficient of thermal conductivity of 0.025 W/m °C. what is the rate of heat flow through the comforter
You are standing in the very center of a deep, flat-bottomed valley, and shout "Hello!" If the speed of sound is 343 m/s, how wide is the valley
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 5.00 V. The RMS current delivered to the answering machine is 400 mA. If the primary (input) coil of the transformer has 600 tur..
The index of refraction for red light in water is 1.331 and that for blue light is 1.340. What is the underwater angle of refraction for the blue component of the light
n = 3.24 mol of Hydrogen gas is initially at T = 357 K temperature and pi = 2.79×105 Pa pressure. How much heat did the gas emit
A series circuit with R=100ohms, L=.5H and C=50 MuF is driven by an ac signal of frequency 75 Hz and amplitude of 18V. what are the rms values of the voltage and current
A car changes it speed from rest to 12 km/hr in 4sec .If the mass of the car is 2000 killograms what is the net force acting on the car
An ?-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.38 106 V, What is the speed of the ?-particle
Consider an electron in a hydrogen atom, which is 0.050 nm from the proton in the nucleus, What electric field does the electron experience
An uncharged 20 uF capacitor is connected to a power supply set to 10 V. how much more charge flows onto the plates
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