7. If 8 million kg of water flows over Niagara Falls each second, calculate the power available at the bottom of the falls.

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

Why do atoms emit energy of only specific wavelengths

What is the relationship between globular clusters and the milky way?