Use the story below to fill in the questions. A) Origin and development

B) Earth

C) Life

D) Early technologies

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.)

When an object is heated it contracts. a. true b. false

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?