Un automóvil se mueve en el aire en calma con una velocidad de 54Km/h. Si la frecuencia de la nota emitida por el pito es de 800Hz. ¿Cuál es la longitud de onda de las ondas sonoras, delante y detrás del automóvil? a. a) 0,44m y 0,41m
b. c) 41m y 44m
c. b) 0,41m y 0,44m

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

A1500 w electric heater is plugged into the outlet of a 120 v circuit that has a 20 a circuit breaker. you plug an electric hair dryer into the same outlet. the hair dryer has power settings of 600 w, 900 w , 1200 w, and 1500 w. you start with the hair dryer on the 600 w setting and increase the power setting until the circuit breaker trips. under what setting does the circuit breaker trip.

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided