What is required for heat to be transferred through thermal conduction? A. Particles that move past each other
O B. Sound waves
O C. Electromagnetic waves
O D. Particles that bump into each other

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

The gun from the crime scene shows tool marks where the serial numbers are ground off. there are also tool marks on the bullets left behind. what information can the tool marks on the bullets and gun provide about the crime? what type of evidence does this information provide, individual or class?

Which inventor was often called the lady edison