A fluid has a flow rate of 5.0 m3/s as it travels at a speed of 7.5 m/s through a pipe. What is the cross-sectional area of the pipe?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

f=ma newton's second law 7x8=56n