PH is given by the formula pH = -log [H+]where (H+) is the concentration of
hydrogen in moles per liter. If the pH of
Bill's swimming pool is 7.8 and the pH of
Maura's swimming pool is 7.2, whose
pool has a greater concentration of
hydrogen? How many times greater is it?
Answers
Answer:
- Maura's
- 4 times
Step-by-step explanation:
The logarithm function is monotonic with a positive slope everywhere. So, the logs of numbers are in the same order as the numbers themselves. pH is the negative of the logarithm, so the pH values are in the reverse order of the numbers themselves.
Maura's pool has a lower pH, so will have a higher concentration of hydrogen ions.
The log of a ratio is the difference of the logs. Here, the difference of the logs is 7.8 -7.2 = 0.6, so the ratio of H+ concentrations in the two pools is ...
10^0.6 ≈ 4.0
Maura's pool has 4× the H+ concentration of Bill's pool.
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I did a manual computation per company: My computation is entirely based on trial and error.
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Let's start with the Red Bus Co. I will be posting the charges per hour and its running balance. The running balance is the sum.
Fixed Rate 150 Running Balance: 150 => 150 + 0
Hr 1 72 222 => 150 + 72
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I'll do the same process with Blue Bus Co.
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Answers
Answer:
The value of impulse is 9 N-s.
Step-by-step explanation:
The momentum vs time graph shows the impulse
Impulse :
Impulse is the product of force and time.
In mathematical terms,
Where, F = force
t = time
According to graph,
Impulse=total area
Hence, The value of impulse is 9 N-s.
Answer:
try 12 Newton seconds
Step-by-step explanation:
I think it's going to be 12 because if you find the slope of the first line you get 1 Newton and the slope of the second line is -1 Newton's. so that means there is a change of -2 newtons. so if you multiply -2 Newton's by the 6 seconds you -12 Newton seconds. let me know if this is correct as it's been a while since I've done this type of stuff.
Answers
−1 + 10i
1 + 6i
1 + 10i
Answers
The given expression simplified can be written as -1 + 6i. which is the correct answer that would be an option (A).
What is a complex number?
A complex number is a combination of real values and imaginary values. It is denoted by z = a + ib,
where a, and b are real numbers and i is an imaginary number.
To simplify the expression (3 + 8i) − (4 + 2i), we need to subtract the two complex numbers. To do this, we subtract the real parts and the imaginary parts separately.
The real part of the first complex number is 3, and the real part of the second complex number is 4.
Subtracting these gives us -1.
The imaginary part of the first complex number is 8, and the imaginary part of the second complex number is 2.
Subtracting these gives us 6. Therefore, the simplified expression is (-1) + (6i) = -1 + 6i.
Therefore, the correct answer is: -1 + 6i.
Learn more about the complex numbers here:
#SPJ2
Answer:
-1+6i
Step-by-step explanation:
(3+8i)-(4+2i)
3+8i-4-2i
3-4+8i-2i
-1+6i