Molly is looking for a sustainable fuel source that doesn’t require technical equipment to harness. She is concerned that trees take too long to replace through reforestation. What alternative should she consider?
A. fossil fuels
B. geothermal
C. hydroelectric
D. biomass
E. tidal

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

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,?

Arigid tank is divided into two equal parts by a partition. one part of the tank contains 3 kg of compressed liquid water at 400 kpa and 60°c while the other part is evacuated. the partition is now removed, and the water expands to fill the entire tank. determine the entropy change of water during this process, if the final pressure in the tank is 40 kpa. use steam tables.