Atube has a length of 0.035 m and a cross-sectional area of 7.3 x 10-4 m2. the tube is filled with a solution of sucrose in water. the diffusion constant of sucrose in water is 5.0 x 10-10 m2/s. a difference in concentration of 5.1 x 10-3 kg/m3 is maintained between the ends of the tube. how much time is required for 3.1 x 10-13 kg of sucrose to be transported through the tube?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

The strong nuclear force acts over a small distance than the electrostatic force. true or false