Temperature changes can affect substances in different ways. Which of these actions will form a new substance with different properties?

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this

Give me a example of a decomposer. explain what would happen if decomposers were absent from a forest ecosystem