Beverly will ride an escalator for as long as Mrs. Peterson will let her. What 1 point BEST describes Beverly's speed on an escalator? *

An observer that stands still as the electron moves by him, will observe

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

Abookcase has a mass of 38 kg and the coefficient of friction between it and the floor is 0.82 what is the maximum force of friction between the bookcase and the floor a 372n b 305n c 412n d 449n