Which of these is a key feature of an experimental study?
a. the treatment in the experiment should be simple enough for each individual in the experimental group to understand.
b. the treatment in the experiment must vary for each individual in the experimental group.
c. the treatment in the experiment must be applied to each of the individuals in the experimental group.
d. the treatment in the experiment should be short so that each individual is tested quickly.

=force × distance a. work b. velocity c. pressure d. momentum

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,?

Frequency of electromagnetic waves that a radio station is assigned is called