A stationary car is stopped at a traffic light. When the light turns green at t = 0, a truck with a constant speed of 25m/s passes the car. The car uniformly accelerates to its top speed (30m/s) in 10 s then moves at a constant speed. How long will it take for the car to catch up with the truck?

Which describes an image that can be produced by a concave lens? the image is real and smaller than the object. the image is virtual and larger than the object. the image is virtual and smaller than the object. the image is real and larger than the object.

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?