A scuba diver makes a slow descent into the depths of the ocean. His vertical position with respect to a boat on the surface changes several times. He makes the first stop, d1 from the boat but has a problem with equalizing the pressure so he ascends d2 and then continues descending for another d3 to the second stop. From there, he ascends d4 and then descends for d5, ascends again for d6 and descends again for d7, where he makes a stop waiting for his buddy. Assume the positive direction is up to the surface express his net vertical displacements (in m) in terms of the unit vector. What is his distance to the boat (in m)?

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

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?