Acertain force gives a 5-kg object an acceleration of 2.0 m/s2. the same force would give a 20-kg object an acceleration of

Ireally need this answer sombody fast fast

The amount of potential energy possessed by an elevated object is equal to what?

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.