A train accelerates at a rate of 2.5 km/he/sec. During the acceleration period, it's velocity changes by 55 km/he. How long did the train accelerate?​

Energy flows from the producer level to the level. is called

Agraduated cylinder contains 63.0 ml of water. a piece of gold, which has a density of 19.3 g/ cm3, is added to the water and the volume goes up to 64.5 ml. calculate the mass in grams of the gold that was added to the water. explain how you got your answer.

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader