a bus starting from rest moves with a uniform acceleration of 0.1 metre per second square for 2 minutes find the speed acquired be the distance trouble​

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.

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.