In the experiment, a meter is hooked up to a speaker to monitor the amplitude of the received sound. suppose the background signal level is 10 mv, the signal is 96 mv with no attenuator and is 32 mv with an attenuator in place. calculate pt/pipt/pi including the background correction.

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?

Thermal radiation gets its name because

Which of the following characteristics is fixed, or definite, for all states of matter?