A and b are both safety protocols, but C says to follow all saftey protocols. your answer is C
Answer:
faster, ocean, water, Cooler, less, More, Land.
Explanation:
<h3>
Answer:</h3>
22.41 seconds longer
<h3>
Explanation:</h3>
- Sound is a longitudinal wave that requires a material medium for transmission hence called a mechanical wave.
- Examples of medium in which sound travels in are water and air.
From the question give;
Speed of sound in air at 20°C is 343 m/s
Speed of sound in water at 20°C is 1,483 m/s
We are given a distance of 10 Km or 10,000 m
We need to finder how much longer it will take for the sound to travel in air.
Time = Distance ÷ Speed
Therefore;
Time taken in Air = Distance ÷ speed of sound in air
= 10000 m ÷ 343 m/s
= 29.15 seconds
Time taken in water = Distance ÷ speed of sound in water
= 10,000 ÷ 1,483 m/s
= 6.74 seconds
Difference in time = 29.15 seconds - 6.74 seconds
= 22.41 seconds
Therefore, it takes 22.41 seconds longer for sound to travel through air than water.
Mass % of NaCl = 0.9 % (m/v)
Density of 0.9 % NaCl is about 1.0 g/mL
Volume of NaCl in mL :
= 11.25 mL NaCl
