Area near a sea having flat land and low relief
You didn't mention it, but the trumpeter herself has to be standing still.
<span>Person C, the one running towards the trumpeter, hears a pitch
that is higher than B-flat. (A)
Person B, the one running away from the trumpeter, hears a pitch
that is lower than B-flat.
Person D, the one standing still the whole time, hears the B-flat.</span>
Initial velocity: 0
final velocity: 7 m/s
a = 3.6
t = ?
x = ?
(7-0)/3.6 = t
t = 1.94 s
Answer:
D
Explanation:
Political scientists use political models to describe the political climate, which is an aggregate mood or opinion of a political society at a point in time.
Answer: The atomic mass of a Europium atom is 151.96445 amu.
From the given information:
Percent intensity is 91.61% of Europium atom of molecular weight 150.91986 amu.
Percent intensity is 100.00% of Europium atom of molecular weight 152.92138 amu.
Abundance of Eu-151 atom:
![X_{Eu-151}=\frac{0.9161}{0.9161+1.000}=0.4781](https://tex.z-dn.net/?f=X_%7BEu-151%7D%3D%5Cfrac%7B0.9161%7D%7B0.9161%2B1.000%7D%3D0.4781)
Abundance of Eu-153 atom:
![X_{Eu-153}=\frac{1.000}{0.9161+1.000}=0.5219](https://tex.z-dn.net/?f=X_%7BEu-153%7D%3D%5Cfrac%7B1.000%7D%7B0.9161%2B1.000%7D%3D0.5219)
Atomic mass of Europium atom:
![A=(X_{Eu-151}\times150.91986+X_{Eu-153}\times152.92138)amu\\A=(0.4781\times150.91986+0.5219\times152.92138)amu=151.96445 amu](https://tex.z-dn.net/?f=A%3D%28X_%7BEu-151%7D%5Ctimes150.91986%2BX_%7BEu-153%7D%5Ctimes152.92138%29amu%5C%5CA%3D%280.4781%5Ctimes150.91986%2B0.5219%5Ctimes152.92138%29amu%3D151.96445%20amu)
Therefore, the atomic mass of a Europium atom is 151.96445 amu.