Asmall sphere with mass m carries a positive charge q and is attached to one end of a silk fiber of length l. the other end of the fiber is attached to a large vertical insulating sheet that has a positive surface charge density ïƒ. assume that the sphere is in equilibrium and find the angle that fiber makes with the vertical sheet. express your answer in terms of the variables q, ïƒ, m, and appropriate constants.

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

Describe the function of the endomembrane system? what organelles are involved?

16. a brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 n on him. the mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20m/s2 size 12{1 "." "20"" m/s" rsup { size 8{2} } } {} backward. (a) what is the force of friction between the losing player’s feet and the grass? (b) what force does the winning player exert on the ground to move forward if his mass plus equipment is 110 kg? (c) draw a sketch of the situation showing the system of interest used to solve each part. for this situation, draw a free-body diagram and write the net force equation.