Compare and Contrast the Following: 1. Pitch and Loudness
2. Infrasonic and Ultrasonic
3. Luminous and Nonluminous

It's okay if you answer only one of these.

Thanks in Advance

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

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.)

The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?