Which of the following is not true about chemical changes? a. they form a new substance. b. they can be reversed by physical changes. c. they can be detected by changes such as color. d. they have different properties from their starting materials.

Plz mark brainliest 30 points 1) find the momentum of a 12 kg snowball that is rolling with a velocity of 9 m/s. 2) an 8 ball with a mass of .5 kg is sitting at rest. it is hit by the cue ball (1 kg) traveling at 2.5 m/s. if the cue ball is at rest after the collision, how fast is the 8 ball traveling after the collision? 3) two football players are running toward each other. if the offensive player is 75 kg and is running 8 m/s, how fast must the 60 kg defensive player run in order for the two players to hit and stop?

Adepositional also feature that forms where a stream enters a lake or an ocean is a

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above