Give a suggestion to make speech distinct in a cinema hall. explain the reason for your answer. hey guys don't joke ok it's my homework answer fast .

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?

Select for each of the following statements whether it is correct or incorrect. (a) in an isothermal expansion of an ideal gas. (b) the temperature remains constant. (b) the pressure remains constant. (c) there is work done by the gas. (d) there is heat added to the gas. (e) the change in internal energy equals zero.

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?