Recent content by aracali

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    What would the angle φ be for this deflected laser beam?

    Homework Statement The mirror in the image below deflects a horizontal laser by angle θ. What is the angle φ if θ = 60°. Homework Equations θi=θr The Attempt at a Solution So I know that, if I draw a line normal to the mirror, that will make it so that the incident angle and the reflected...
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    Undergrad Why isn't a molecule's kinectic energy dependant on mass?

    So my book say's "A molecule's average translational kinetic energy depends only on the temperature, not on the molecule's mass. If two gases have the same temperature, their molecules have the same average translational kinetic energy." My question is, why? I mean, wouldn't molecules with...
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    Finding the expression for momentum.

    p= momentum m=mass v=velocity I also forgot to include: Faverage(Δt)=mΔv=Δp=J
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    Finding the expression for momentum.

    Homework Statement A bullet of mass m is fired into a block of mass M that is at rest. The block, with the bullet embedded, slides distance d across a horizontal surface. The coefficient of kinetic friction is μk. Find an expression for the bullet's speed vbullet. Express your answer in terms...
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    Calculating Tension in a Hypothetical Moon-Earth System

    Homework Statement Suppose the moon were held in its orbit not by gravity but by a massless cable attached to the center of the earth. Find the tension in the cable. Homework Equations F=ma a=v^2/r v=2πr/T (since the pictures aren't working, I'm just going to post the url to the image)...