Homework Statement
http://aycu16.webshots.com/image/13135/2004772066267823450_rs.jpg
The mass of the ball is 40 milligrams, the applied potential difference is 480 V and the plate separation is 6 cm. If the string hangs at an angle of 20deg to the vertical, determine the charge on the...
Right.
Lenz's law states exactly that, 'The direction of any induced current is such as to oppose the flux change which causes it'
Oppose is the key word here.
Yes. You need monochromatic light (of constant frequency) to create what they call a 'fringe pattern' on a screen, after the light passes through two slits. Ordinary light (like that which comes from conventional light bulbs) would not work.
Thomas Young first did this in 1801, as you say...
Oh, yeah, algebra got me there.
So it'd have to then be:
S2 = {\frac{v^2}{4r}}
Ah, so now it gives me a much simpler division to do. When i divide those S1/S2 after multiplying and cancelling i get 4r/r.
Awesome, so the answer is 4. Thanks for pointing out the algebra mistake.
Ok. So since the mass is equal its constant, so we just have
F = Vsquared/r
So then, S1 = Vsquared/r
S2 = (v/squareroot2)squared/2r
= (vsquared/2)/2r
= (2vsquared*r)/2
S1 = Vsquared/r
S2 = (2vsquared*r)/2
Hmm.. so now?
Homework Statement
Two satellites of equal mass, S1 and S2, orbit the earth. S1 is orbiting at a distance r from the Earth's center at speed v. S2 orbits at a distance 2r from the Earth's center at speed (v/squareroot2) . The ratio of the centripetal force on S1 to the centripetal force on S2...
Homework Statement
A woman is standing on a flat section of ground. Her weight is 500N. Newton's third law states that there must be an equal an equal and opposite force to her weight, which is
A. The Earth exerting an upward force of 500 N on the woman.
B. The woman exerting an upward...