Sophie is trying to measure the speed of sound. She stands 24.0m away from a wall and claps repeatedly, changing the frequency until the echo synchronised with her claps. If she calculates the speed of sound as 325m. s-1 how long did she wait between claps?
Give your answer in seconds, without units and correct to three significant figures.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

When using the scientist method, which step comes last?