Recent content by googlyeyes

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    What is the radius of the circular arc if the accelerating potential is tripled?

    Homework Statement An electron is accelerated from rest through a potential difference V and then enters a uniform magnetic field oriented perpendicular to its path. The field deflects the particle into a circular arc of radius R. If the accelerating potential is tripled to 3V, what will be...
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    Inverse Square Law: Total Power at Earth per Unit Area

    I used 6.955x10^8 as the r but I am not sure where I got that from now? The question also gives that "the surface area of the sun has an effective temperature of approx. 5800K" and for the calculation to find the wavelength of peak emission i did: (2.898x10^-3)/5800 = 4.9965x10^-7
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    Inverse Square Law: Total Power at Earth per Unit Area

    Oh so what units have I got it in? I just did the SA (4pi*r^2) multiplied by σT^4 to get the power
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    Inverse Square Law: Total Power at Earth per Unit Area

    And can you treat the "proportional to" sign as an equal sign and just rearrange the equation?
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    Inverse Square Law: Total Power at Earth per Unit Area

    So the equation would look like this: I2/3.901x10^26 is proportional to (Rs/Re)^2 ??
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    Inverse Square Law: Total Power at Earth per Unit Area

    No it wasnt given
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    Inverse Square Law: Total Power at Earth per Unit Area

    Homework Statement The intensity (I) of sunlight (the received power per unit area) drops with distance (d) from the sun according to the inverse square law - i.e I2/I1 is proportional to (d1/d2)^2 What is the total power received at Earth (above the atmosphere) per unit of surface area...
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    How Does Changing Wavelength Affect the Power of a Light Source?

    Ok well I am pretty sure that visible light has a wavelength between around 400-700nm but doesn't that mean there are so many wavelengths that could be chosen and thus many different answers to the question?
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    How Does Changing Wavelength Affect the Power of a Light Source?

    I will post it anyway: QUESTION: Radio station WSFM broadcasts at 101.7MHz with an effective radiated power of 12kW. (a) What is the value of the momentum of each radiated photon (b) If an electron had the same momentum, how fast would the electron be travelling? (c) How many photons does WSFM...
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    How Does Changing Wavelength Affect the Power of a Light Source?

    There are actually multiple parts to this question. Would you like me to type them up with my working for those as well (as that may also be wrong)
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    Wavelengths of standing waves on a string

    Thank you so much! I understand this concept so much better now! I really appreciate your help!
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    Wavelengths of standing waves on a string

    Um 4th would be 1/2L, 5th would be 2/5L?
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    Wavelengths of standing waves on a string

    Ok so the 1st one would be 2L, the 2nd would be L and the 3rd would be 2/3L?
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    Wavelengths of standing waves on a string

    So to find the five longest wavelengths do i need to use the formula i gave or should it be obvious (in terms of L) from drawing it?
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    Wavelengths of standing waves on a string

    Yes but I am not sure my thinking is right. I am thinking that in order for the wavelength to fit on the string it must either be L (the length of the string) or half, half again, etc. for the entire wave to fit (i am new to physics). Is this thinking completely wrong?