100 points easy physics A feather (mass = 0.1kg) and a bowling ball (4.5kg) will both fall at the SAME rate on Earth (g=9.8m/s2) if there is no air resistance. How much force does each item have if it is falling due to the acceleration of gravity?

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

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

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.