Recent content by tinksy

cheers tom :smile: so would that be considered a physical way of determining the direction of the wave?

I have a question regarding waves which has been bugging me for a while: "You are given a traveling wave with an equation of the form cos(ax+/-bt) where x and t are position and time as usual, a and b are positive numbers. Explain how you would physically determine the direction that the...

yaaaaaay! thanks

thanks teddy... could u tell me if I'm right? i've used kepler's law T^2 (directly proportional to) R^3 so if R = 8R (as for Earth, R = 1AU so for the planet, R = 8AU) kepler's law: R^3/T^2 = 1 therefore, T^2 = 8^3/1 so T = (root)512 = 16(root)2 ...? is that correct?

hi, could someone please help me with this problem?? If a small planet were discovered with a distance from the sun eight times that of the Earth, what would you predict for its period in (Earth) years. (i.e. how many times longer would it take to go round the sun than the Earth does.)