How do the effects of a stimulant differ from the effects of a depressant?

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 measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass

Which planet do you think would be easiest for humans to colonize some day?