Help !! You are using sonar over a spot in the ocean known to be 91.8 m deep. The system emits a 50.0-kHz pulse into the water. It takes 120.0 ms for the sound to travel to the ocean floor and back to the sonar system. Determine the speed of sound in the ocean and the wavelength of the sonar pulse.

a. Speed = 765 m/s

b. Wavelength = 0.0153 m

Explanation:

Given the following data;

Distance = 91.8m

Time = 120 milliseconds to seconds = 120/1000 = 0.12 seconds

Frequency = 50KHz = 50 * 10³ = 50000 Hz

a. To find the speed of sound in the ocean:

Speed = distance/time

Speed = 91.8/0.12

Speed = 765 m/s

b. To find the wavelength;

Wavelength = speed/frequency

Wavelength = 765/50000

Wavelength = 0.0153 m

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

mistakes are ok