What does the dial on the multimeter do?

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

Atypical jetliner lands at a speed of 146 mi/h and decelerates at the rate of (10.4 mi/h)/s. if the jetliner travels at a constant speed of 146 mi/h for 1.5 s after landing before applying the brakes, what is the total displacement of the jetliner between touchdown on the runway and coming to rest?

Why did thomson's results from experimenting with cathode rays cause a big change in specific thought about atoms ?