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].
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.
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...
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.
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.
"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?
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.
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?
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...
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...