Atruck horn emits a sound with a frequency of 238 hz. the truck is moving on a straight road with a constant speed. if a person standing on the side of the road hears the horn at a frequency of 220 hz, then what is the speed of the truck? use 340 m/s for the speed of the sound.

Explanation:

If the person hearing the sound is at rest, then the equation for the frequency heard given the emitted frequency , the speed of the truck and the speed of sound will be:

Where will be positive if the truck is moving away from the person, and negative otherwise. We then do:

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by