Sound, light, feelings and ideas are not considered to be matter. Which of the
following best explains why this is true?
A. None of these contain mass.
B. None of these can be measured.
C. All of these consist of atoms.
D. Each of these occupy space (have volume).

What are the theoretical properties of a gas at a temperature of 0 kelvin?

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?