Recent content by The Motif

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    Velocity Time graphs and Displacements

    This problem is quite common in classrooms. The answer, along with the proper work, can be found at [PLAIN]"www.youtube.com/watch?v=Yu_moia-oVI"[/URL].
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    Calculating Gauge Pressure in a Two-Story House

    Ah, I see the error. Why is the pipe entering the house on the first floor? We all know pipes enter through the basement. Therefore, the height should be negative.
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    What is the charge on each sphere in a force balancing problem?

    Sweet Leibniz. I finally got it right. Thanks for your patience.
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    What is the charge on each sphere in a force balancing problem?

    Alright. Let's run through this together. We can agree that R=0.051185. T=mg/cosθ T=(0.02)*(9.8)/cos(7) T=0.196/0.9925462 T=0.1974719258 sinθ*T=K*q^2/r^2 sin(7)*0.1974719258=8.98755e9*q^2/(.051185)^2 0.0240657739=8.98755e9q^2/0.0026199 6.305e-5=8.98755e9q^2 7.01526e-15=q^2...
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    What is the charge on each sphere in a force balancing problem?

    Yes, I've already used that and it yields the incorrect answer stated above. What did you get when you plugged and chugged?
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    What is the charge on each sphere in a force balancing problem?

    Thanks for all of the help so far. So it would just be sin(theta)*mass*gravity = K*Q^2/R^2? This is the last problem on my Internet Homework and I can't afford to guess again or enter an answer I am uncertain of.
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    What is the charge on each sphere in a force balancing problem?

    Wait... so I would just solve for Q in: 0=K*Q^2/R^2
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    What is the charge on each sphere in a force balancing problem?

    I'm still not getting the right answers... let me write this out. length*sin(theta)*mass*gravity = K*Q^2/R^2 K=8.98755*10^9 R=0.0511851242 mass=0.2 gravity=9.8 theta=7 length=0.21 I am getting 3.82*10^-8 for Q and it is incorrect.
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    What is the charge on each sphere in a force balancing problem?

    "You could lose the precision." Typical forum-crawling physics elitist, eh? Haha, just kidding... maybe, but not really. I would multiply those two quantities because the force of tension is evenly distributed on the string, right?
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    What is the charge on each sphere in a force balancing problem?

    Would I have to multiply the first number by the product of mass and gravity (force and tension)? Is my second number correct?
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    What is the charge on each sphere in a force balancing problem?

    Okay, there's the force of gravity pointing downward, the force of electricity pointing horizontally, and the force of tension in a diagonal position as the hypotenuse of the triangle.
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    What is the charge on each sphere in a force balancing problem?

    So the horizontal force of the triangle is 0.21*sin 7 = .0255925621 and the distance of separation is .0255925621(2)=0.0511851242, right? The first number would be F and the second number would be r in Coulomb's law equation?
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    What is the charge on each sphere in a force balancing problem?

    Homework Statement Two identical small charged spheres hang in equilibrium with equal masses as shown in the figure. The length of the strings are equal (0.21 m) and the angle (shown in the figure) with the vertical is identical (7 degrees). The acceleration of gravity is 9.8 m/s^2 and the...
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    Please. Internet test due soon.

    Homework Statement You observe a lead brick with a rest mass of 27 kg. What is its apparent mass if it is moving away from you at 0.73c? The speed of light is 3e8 m/s. Answer in units of kg. What if you are moving toward it at -0.73c? Homework Equations The Attempt at a...
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