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

An element becomes a positively charged ion when itloses protons. loses electrons. gains electrons. gains neutrons.

You have two photos of a person walking. one shows the person at the corner of third and main streets, the other shows the person at the corner of tenth and main streets. there are lampposts at every corner in this town, and the first picture shows it to be 10: 32: 00 exactly. the second picture shows it to be 10: 49: 30. you know three facts: (1) all of the clocks are synchronized; (2) there are exactly 12 equal-sized blocks per kilometer in this town; and (3) the streets that cross main in this area are numbered consecutively, with no interruptions. what is the person’s average speed in kilometers per hour?

Which of these are physical changes in matter? check all that apply. boiling water a pencil being sharpened exploding dynamite freezing water rotting cheese