Make predictions for how the slotted and solid pendula will swing through the variable gap magnet. particularly, how does the system behave when the pendulum is moving and the magnet still vs. keeping the pendulum still and moving the magnet.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Abeverage can is made of 3004-h19 aluminum alloy (elastic modulus 69 gpa, tensile yield strength 285 mpa, density 2.72 g/cm^3). the dimensions on the can are approximated as a thin-walled cylinder with a height of 4.83 inches, diameter of 2.60 inches. empty the can has a mass of 14.2 g. determine: a. the wall thickness of the cylinder b. assuming a pinned-pinned condition what is the critical load? c. assuming a fixed-fixed condition what is the critical load?

Am i correct on these two physics questions?