Answer: The other product of Chadwick's nuclear reaction was carbon-12.
Explanation:
The isotopic representation of an atom is:
where,
Z = Atomic number of the atom
A = Mass number of the atom
X = Symbol of the atom
In a nuclear reaction, the total mass and total atomic number remains the same.
For the given reaction:
To calculate A:
Total mass on reactant side = total mass on product side
9 + 4= A + 1
A = 12
To calculate Z:
Total atomic number on reactant side = total atomic number on product side
4 + 2 = Z + 0
Z = 6
The isotopic symbol is
. Thus The other product of Chadwick's nuclear reaction was carbon-12.
The answer to this question is the first choice. In the hydrogen fusion process, the first step involves the collision of two protons to emit an antielectron and a neutrino. Only the first choice of
1_1H + 1_1H →2_1H + e^+ + v + energy
reflects this process. A hydrogen ion with a mass of one and number protons of 1 means a proton.
Answer:
a) The 99% confidence interval for the mean noise level = [122.44, 151.96]
b) Sample standard deviation, s = 17.3dB
Explanation:
Noise levels at 5 airports = 147,123,119,161,136
Mean noise level
Variance of noise level
Standard deviation,
a) Confidence interval is given by
For 99% confidence interval Z = 2.576,
Number of noises, n = 5
Substituting
The 99% confidence interval for the mean noise level = [122.44, 151.96]
b) Sample standard deviation
Sample standard deviation, s = 17.3dB