You are balancing on a log, and a friend is trying to knock you off. he throws a ball at you. you can catch it, or you can let it bounce off you. which is more likely to topple you - catching the ball or letting it bounce off

Which fators influence ocean currents

What is friction? how does it affect the motion of an object?

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.