Answer:
Explanation:
Velocity of sound in air at 20 degree = 343 m/s
Velocity of sound in water at 20 degree = 1470 m/s
Time taken in to and fro movement in air
=( 2 x 10) / 343 = 0.0583 s
Rest of the time is
.171 - .0583 = .1127 s
This time is taken to cover distance in water. If d be the depth of lake
2d / velocity = time taken
2 d / 1470 = .1127
d = 82.83 m
Answer:
Rita and Katrina both followed similar paths into the Gulf.
Explanation:
Answer:
-3.63 degree Celsius
Explanation:
We are given that
Boiling point of solution=
C
Boiling point water=100 degree Celsius



Where
=Boiling point of solution
Boiling point of pure solvent
C

Using the formula

Molality,
m

Using the formula


We know that

Where
=Freezing point of solvent
Freezing point of solution
Using the formula

Freezing point of water=0 degree Celsius

Hence, the freezing point of solution=-3.63 degree Celsius