A child is riding on a merry-go-round. As the speed of the merry-go-round is doubled, the magnitude of the centripetal force acting on the child
1.
remains the same
2.
is doubled
3.
is halved
4.
is quadrupled

With these questions , 15 pts & brainliest

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?