Calculating Frequency from Energy: A Joules to Frequency Problem

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To calculate the frequency of a light wave with an energy of 2.50x10^-14 Joules, one can use the formula E = h * f, where E is energy, h is Planck's constant, and f is frequency. The discussion highlights a user's request for assistance in solving this physics problem, indicating a lack of familiarity with the concepts involved. Another user suggests searching online for "photon energy to wavelength" as a helpful resource. The interaction emphasizes the importance of using available tools for learning and problem-solving in physics. Engaging with online resources can enhance understanding of such calculations.
Torque-King
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Hi guys,

I'm new to the forum, and I was recently asked this question by my friend:

If a light wave has 2.50x10 to the -14 Joules of energy, what is its frequency?


I'm no good at physics, so I was wondering if you guys could give me a hand. I'm completely clueless.


Thanks,

-Torque-King
 
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Please Google photon energy to wavelength. I doubt that you don't know how to use Google, but will cut you a break this time if you couldn't come up with the search terms.
 
@berkeman Thanks, I'll try it.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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