Two colorless solutions are mixed together in a test tube. A student observes that a bright yellow solid collects at the bottom of the test tube. Is this is physical or chemical change? Cite evidence to support your answer.

Acar traveling at 22 m/s starts to decelerate steadily. it comes to a complete stop in 15 seconds. what is it’s acceleration?

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.

The movement of electrons between atoms is called an