Answer:a means of solving a problem or dealing with a difficult situation.
Explanation:Some examples of solutions are salt water, rubbing alcohol, and sugar dissolved in water. When you look closely, upon mixing salt with water, you can't see the salt particles anymore, making this a homogeneous mixture. Let's make use of our salt water example to talk about the two main parts of a solution.
Heya!!
For calculate speed of the wave, lets applicate formula:

<u>Δ Being Δ</u>
f = Frequency = 50 Hz
v = Velocity = ?
= Wavelenght = 10 m
⇒ Let's replace according the formula:

⇒ Resolving

Result:
The speed of that wave is <u>500 meters per second.</u>
Good Luck!!
Answer:
=24.25 ^−1
Explanation:
Let and be initial and final velocity of the body respectively,
be acceleration due to gravity ( 9.8^−2 ), ℎ be the height of the body.
=0 ^ −1
ℎ=30
we know that, ^2−^ 2=2ℎ
^2=2∗9.8∗30
^2=588
=24.25 ^−1