Which would produce mechanical waves?
A) burning a candle
B) hitting a wall with a hammer
C) turning on a flashlight
D) tying a rope to a doorknob

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

What conclusion can be made based on the temperature of soil when the light hits the soil at 0°, 45°, and 90° angles in section 2 of the experiment? did your results support your hypothesis? why or why not?

Positive ions differ from neutral atoms in that