In the experiment that you did last period you found the speed of sound in air using a closed pipe. If a pipe first resonates at 12 cm using a 740 Hz tuning fork, what is the speed of sound?

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?