How much heat energy is required to raise the temperature of 5 kilograms of coal from 20 celisus to 220 celsius?
a.) 6,573 j
b.)314 j
c.) 1,314,718 j
d.) 4,187,000 j

Which one of the following research methods can show cause and effect

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,?

What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?