HELP QUICK 7. A loud speaker produces a soundwave that you can hear.
Describe in detail:
- how the sound is produced
- how the sound travels
- how the sound detected by your ear

Arrange the images in order to show how lake-effect snow occurs.

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

A: all waves on the electromagnetic spectrum travel at the same speed in a vacuum. the speed of these waves in a vacuum is 3x108 m/s. as the wavelength of a wave doubles, how does the speed and frequency of the wave change?