A radio tower emits energy in the form of waves. These waves travel great distances. Some of them even leave Earth and travel
through the vacuum of outer space.
What type of energy is described above?
A. light energy
B. sound energy
C. heat energy
D. kinetic energy

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

In a system, when potential energy decreases, then entropy also decreases. true false

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.