Recent content by leolaw

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    Conservation Of Energy Problem

    So this is the quaiton that i have problem w/: A 4kg bundle starts up a 30 degree incline with 128J of kinetic energy. How far willl it slide up the incline if the coefficient of kinetic friction between bundle and incline is 0.3? Because E_initial + Work = E_final and the Work done in the...
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    An gas molecule problem

    Yes, I have fixed up on the equation. THx
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    An gas molecule problem

    I am stuck in this gas problem: You are given a 10.00 gram solid mixture of Ca(ClO_3)_2 and Ca(ClO)_2. When this mixture is heated, both componds decomplse, releasing oxygen gas and leaving behind solid CaCl_2 When this 10.00gram mixture is sealed in a 10.0-Liter evacuated vessel and heated...
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    Finding the resulant from the product

    I am new to Chem, and I don't quite understand how to solve this problem: Component of citrus fruits is the bitter compound limonin, which contains only carbon, hydrogen, and oxygen. When a 1.000-gram sample of limonin is subjected to complete combustion, 2.432 grams of CO_2 and 0.574 grams...
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    Wave nature of light problem

    I see, so D sin (90) = (1) \alpha, which is the first minimum, and D has to be equal to the wavelength \alpha.
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    Wave nature of light problem

    that sin of zero degrees is 0
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    Wave nature of light problem

    Given a wavelength length \alpha, what is the maximum Width (D) of a single slit, which would have no diffraction minima? It seems like a proof problem to me and I am trying to get a head start. should I use D * sin (\theta) = m \alpha ?
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    Water wave

    I find the angle to be 14.48 degree, but I didn't use the 2 meters that the question provdied. Am I missing something? I use d sin (\theta) = (m + \frac {1}{2} )(0.025m) where d = 0.05m, and m = 0 to find \theta.
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    Water wave

    distance from crust to crust, gottcha
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    Water wave

    how can i find the wavelength of the water wave? Is it simply just 1/2.5cm or 40m?
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    Water wave

    This question is related to the wave nature of light from Giancoli: Water waves having parallel crests 2.5cm apart pass through two openings 5cm apart in a board. At a point 2.0m beyond the board, at what angle relative to the "straight-through" direction would there be little or no wave...
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    Magnetic Force

    But how can i solve for l in order to calculate the Force by using F = I l B sin \theta ?
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    Magnetic Force

    Ok, this problem shows up on my test today and I was wondering how you can solve it: A circular coil of wire has a diameter of 20 cm and contains 10 loops, internal resistance of 8 ohms, and the coil is placed in a 2.00T external magnetic field. When 1 volt is applied to the coil, determine...
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    Thin len problem

    Oh, ray B travels in the shortest path but it takes the longest time because it stays more time in the len !
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    Thin len problem

    But in this question, we have air- len (glass)(very short distance) - air, so the index of refraction doesnt affect much to the distance right
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