Which statements correctly compare the gravitational force with the electrical force? check all that apply. a) the gravitational force can be repulsive. b) the gravitational force can be attractive. c) the electrical force can be repulsive. d) the electrical force can be attractive. e) any two objects experience a gravitational force between them. f) any two objects experience an electrical force between them.

Natural forces that can alter ecosystems include seasons and climate changes. t or f

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?

Eddy whose mass is 55kg climbs up the 1.50 meter high stairs in 2s.calculate eddy’s power rating