Tennis is classified as an exercise program.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

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.

Aball horizontally thrown from a cliff at 8m/s