The first law
The first law dictates that the total energy in a system remains constant.
Answer:
a) degrees
b) degrees
c) degrees
Explanation:
If we have a vector in a two dimensional space. The angle respect the x axis can be founded from the following expression:
And then the angle is given by:
Part a
Ax = 11 m and Ay = 11 m
For this case the angle would be:
degrees
Part b
Ax = 19 m and Ay = 11 m
For this case the angle would be:
degrees
Part c
Ax = 11 m and Ay = 19 m
For this case the angle would be:
degrees
The amount of Li present to start the reaction is 55.18g
<u>Explanation:</u>
2Li + Br₂ → 2LiBr
Molecular weight of Br₂ = 159.808 g/mol
Mass of Br₂ present = 225 g
Moles of Br₂ present during the reaction = 225 / 159.808
m = 1.4
Molecular weight of LiBr = 86.845 g/mol
Mass of LiBr formed = 690 g
moles of LiBr produced = 690 / 86.845
m(LiBr) = 7.95
According to the balanced equation, 2 molecules of Li reacts to for 2 molecule of LiBr
So, 7.95 moles of LiBr would require 7.95 moles of Li
The molecular weight of Li is 6.941 g/mol
Thus, the amount of lithium present to start the reaction is
Therefore, the amount of Li present to start the reaction is 55.18g
Answer:
The position of the image from the camera lens is approximately 121.1 mm
Explanation:
The given parameters of the lens are;
The specification of the camera lens = 120 mm
Therefore, the focal length of the camera lens, f = 120 mm = 0.12 m
The distance of the object from the camera, = 13 m
The lens equation for finding the position of the image is given as follows;
Where;
= The position of the image from the camera lens
Therefore, by plugging in the known values, we have;
The position of the image from the camera lens, = 0.1211 m = 121.1 mm
A material's ability not to break is called ductility.