Rms Definition and 203 Threads

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    Rms speeds at 20 degrees celcius of atoms of helium

    1. Calculate the rms speeds at 20 degrees celcius of atoms of helium (4u)? 2. The escapte speed from the surface of the Earth is 11.2 km/s. Find at what temp. the following gas (O2) have this value as the rms speed? 3. One mole of an ideal monatomic gas is heated from 0 degrees celcius...
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    Voltmeter Measurement: Peak vs RMS?

    I took some measurements for a Physics lab and don't recall whether the Voltmeter I used reports the peak voltage or rms voltage. I need rms voltage to calculate the rms current. Can anyone tell me what the norm is for voltmeters: peak or rms? To divide by the [squ]2 or not to divide by the...
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    Calculating Average Magnetic Field for a 15 mW 2mm Laser Beam

    Hello! A 15 mW laser puts out a narrow beam 2mm in diameter. what is the average(rms) value of the magnetic field? I have the formula E^2 = E^2_0/2 but I need some additional help figuring out how to set up the problem to solve for it. Can you help, please? Thanks! Dx :wink:
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