A50. - kg pole vaulter running at 10. m/s vaults over the bar. her speed when she is above the bar is 1.0 m/s. neglect air resistance, as well as any energy absorbed by the pole, and determine her altitude as she crosses the bar.

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?

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?