I believe the answer to this question is true
Geothermal (volcanoes and heat sources from the earth) and solar
Answer:
13.0mL
Explanation:
So this is a classic M1V1=M2V2 problem, where M is molarity and V is volume and the subsequent numbers represent the two sets of condition (1 being before dilution and 2 being after dilution)
So M1 is going to be 5.0M because it is our initial molarity and V1 is what we are trying to find since we are trying to find how much of initial volume should be diluted.
M2 is 1.30M since it is what molarity is after dilution and M2 is what volume is after dilution which is 50mL.
So M1V1=M2V2 (becomes an algebra problem)
5*V1=1.30*50
V1= 13.0mL
Now this answer should make sense since to dilute something with large molarity to small you only need very few mL than the final volume because you add water to dilute it.
<span>Chemical changes result in the formation of new substances, and the changes that occur cannot be reversed (at least without other chemical changes). The heat from frying an egg causes the egg's protein to change permanently in texture and in appearance through a process called denaturing.
The answer is B. Frying an egg.
</span>
Answer:
16 waves
Explanation:
This is actually pretty easy to understand.
First we have the frequency "f" of the waves which is 0.571429 Hz and we want to know how many waves will hit the beach in 28 s. To know this, we need to know the period time of the waves, this can be calculated with the frequency and the following expression:
T = 1/f
With this expression we can calculate the period time of the waves. So replacing the data:
T = 1 / 0.571429
T = 1.749999 s
Now that we have the period, this number means that every 1.75 s, a wave hit the beach. Now to know the number of waves in 28 s, we just divide the period with the given time:
n = t/T
Replacing we have:
n = 28 / 1.749999
<h2>
n = 16 waves</h2><h2>
This is the number of waves that hit the beach in 28 s.</h2>