Answer:
Explanation:
The maximum theoretical efficiency for a heat engine is given by the Carnot's Cycle. The temperatures of the hot reservoir and the cold reservoir at 1.0 atmosphere are 373.15 K and 273.15 K, respectively. Then:
The ppm is denifite by how many parts of the solute is present in a one million parts of the solution. Remembring that the solute should be in "mg" and the solutions shoud be in "kg".
Number 3If you notice any mistake in my english, please let me know, because i am not native.
C3H8
There is only one isomer of propane:
H H H
HC-C-CH
H.H H
It’s easier to see I’m a bond line formula; however, You can see that trying to take a methyl group off and move it results in the same structure.
Answer:
C
Explanation:
In regression, the critical value t for testing the significance of variable's coefficients has the number of degrees of freedom formula which is (number of observations) - (number of independent variables + 1).
Where number of observations = 697
number of independent variables = 17
Hence, in this case we have
697 - (17+1) = 697 -18 = 679 degrees of freedom.