Aspool is placed on table top. the static friction coefficient between the table top and the spool is high.
part (a) if the string is pulled out over the bottom of the axle as shown, in which direction will the spool roll?
multiplechoice :
1) in the same direction as the applied force.
2) it depends on how much force is applied.
3) it will stay in one place and spin.
4) in the opposite direction of the applied force.

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Suppose that two tanks, 1 and 2, each with a large opening at the top, contain different liquids. a small hole is made in the side of each tank at the same depth 1.57 m below the liquid surface, but the hole in tank 2 has 2.49 times the cross-sectional area of the hole in tank 1. (a) what is the ratio ρ1/ρ2 of the densities of the liquids if the mass flow rate is the same for the two holes? (b) what is the ratio rv1/rv2 of the volume flow rates from the two tanks? (c) at one instant, the liquid in tank 1 is 14.9 cm above the hole. if the tanks are to have equal volume flow rates, what height above the hole must the liquid in tank 2 be just then?

What causes the development of most clouds and precipitation in the atmosphere?