Rms value of the electric-field of the radiation
The microwave radiation left over from the Big Bang explosion of the universe has an average energy density of 3.88 × 10-14 J/m3. What is the rms value of the electric field of this radiation?
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An electromagnetic wave strikes a 1.91-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 9.42 × 10-4 T. How long does it take for the wave to deliver 2980 J of energy to the wall?
The compression ration in an air-standard otto cycle is 8. At the begining of the compression stroke the pressure is 14.7 Lbf/in^2. Determine mean effective pressure.
A stationary particle of charge q = 2.6 × 10-8 C is placed in a laser beam (an electromagnetic wave) whose intensity is 2.4 × 103 W/m2. Determine the maximum magnitude of the (a) electric and (b) magnetic forces exerted on the charge.
The average age of the students in the sample was 23 with a standard deviation of 3.5. Determine whether or not the average age of the evening students is significantly different from 21 at the 1% significance level.
1) What are interference and diffraction? Under what circumstances do they occur? 2) Light from a helium-neon laser is shined on a slit of width .02 mm. Describe qualitatively the pattern of light seen on a screen 1.0 meter away.
A student believes that no more than 20% of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sample received A's. At the 1% significance level, test the hyp
The average gasoline price of one of the major oil companies has been $3.00 per gallon. Because of shortages in production of crude oil, it is believed that there has been a significant increase in the average price.
A proton traveling at 3.60 km/s suddenly enters a uniform magnetic field of 0.750. T, traveling at an angle of 55.0 degrees with the field lines (a) Find the magnitude and direction of the force this magnetic field exerts on the proton.
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