A hoop ( r = 0.35 m; m = 4 kg) is currently rotating at a constant angular velocity of + 4 rad/s as shown in the image. The forces shown are applied for 3.5s .

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

Observations show that interstellar clouds can have almost any shape and

You can decrease the resistance of a length of wire by