A disk of radius R and mass M is spinning at an angular velocity ω0 rad/s. A non-rotating concentric disk of mass m and radius r drops on it from a negligible height and the two rotate together. If R is 1.5 of r and M is 1.2 of m, what is the final angular velocity in terms of ω0? The moment of inertia of a solid cylinder is (1/2)MR2. (First got 0.64ω0, the second time I got 0.56 ω0)

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

Which of the following best describes the circuit shown below?