2 Copy the sentences that follow, filling the gaps with suitable words. a) When a body is in equilibrium, the force acting on it is zero.
b) When a body is in equilibrium, the resultant turning effect acting on it is

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

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.

Estimate of the number of stars in our galaxy