A stationary detector measures the frequency of a sound source that first moves at constant velocity directly toward the detector and then (after passing the detector) directly away from it. The emitted frequency is f. During the approach the detected frequency is f app and during the recession it is f rec. If ( f app f rec)/f 0.500, what is the ratio vs/v of the speed of the source to the speed of sound?

ya te mando la respuesta

the answer is the index of refraction of the second medium is higher. i just took the test.

1) estimating temperature to the nearest tenth of a degree

2) estimating the mass of the sample to the nearest tenth of a gram

4) the position of the cups of sand and water under the heat lamp

the answer is the last option

explanation:

because in order to know what the molecule is you need to know how many atoms of each element are in the molecule.