Mary lou rides her bike at a constant speed for 3 minutes, slows down at a constant rate of 0.300m/s^2 for 1.2 minutes and then moves at a constant speed of 0.740 m/s for 2 minutes. Find the total distance Mary Lou travels during the 6.2 minute time interval.

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 is the coefficient of kinetic friction μk between the block and the tabletop?

In general what determines whether atoms will form chemical bonds?