Explanation:
When we draw the diagram of the motion we get a right angled triangle.
We have an angle of 30° and a base of 17.3M.
We will use trigonometric ratios to solve this.
We will use tan.
Tan = Opposite / adjacent
Tan 30° = h / 17.3
h = Tan 30 × 17.3
h = 0.5774 × 17.3 = 9.99 M
or 9.99 can be roundoffed with 10m
Answer:
The flow area at the location where the Mach number is 0.9 is 25.24 cm²
Explanation:
Here we have for isentropic flow;
![\frac{A}{A^*} = \frac{1}{M}(\frac{2}{k+1} (1+\frac{k-1}{2}M^2))^{(\frac{k+1}{2(k-1)} )](https://tex.z-dn.net/?f=%5Cfrac%7BA%7D%7BA%5E%2A%7D%20%3D%20%5Cfrac%7B1%7D%7BM%7D%28%5Cfrac%7B2%7D%7Bk%2B1%7D%20%281%2B%5Cfrac%7Bk-1%7D%7B2%7DM%5E2%29%29%5E%7B%28%5Cfrac%7Bk%2B1%7D%7B2%28k-1%29%7D%20%29)
Where:
A = Area of flow = 36 cm²
M = Mach number at section of = 1.8
k = Specific heat ratio = 1.4
A* = Area at the throat
Therefore, plugging the values we get
![\frac{36}{A^*} = \frac{1}{1.8}(\frac{2}{1.4+1} (1+\frac{1.4-1}{2}1.8^2))^{(\frac{1.4+1}{2(1.4-1)} ) = 1.439](https://tex.z-dn.net/?f=%5Cfrac%7B36%7D%7BA%5E%2A%7D%20%3D%20%5Cfrac%7B1%7D%7B1.8%7D%28%5Cfrac%7B2%7D%7B1.4%2B1%7D%20%281%2B%5Cfrac%7B1.4-1%7D%7B2%7D1.8%5E2%29%29%5E%7B%28%5Cfrac%7B1.4%2B1%7D%7B2%281.4-1%29%7D%20%29%20%3D%201.439)
Therefore, A* = 36/1.439 = 25.01769 cm²
Where the Mach number is 0.9, we have
![\frac{A}{25.02} = \frac{1}{0.9}(\frac{2}{1.4+1} (1+\frac{1.4-1}{2}0.9^2))^{(\frac{1.4+1}{2(1.4-1)} ) = 1.009](https://tex.z-dn.net/?f=%5Cfrac%7BA%7D%7B25.02%7D%20%3D%20%5Cfrac%7B1%7D%7B0.9%7D%28%5Cfrac%7B2%7D%7B1.4%2B1%7D%20%281%2B%5Cfrac%7B1.4-1%7D%7B2%7D0.9%5E2%29%29%5E%7B%28%5Cfrac%7B1.4%2B1%7D%7B2%281.4-1%29%7D%20%29%20%3D%201.009)
Therefore A = 25.020× 1.009 = 25.24 cm²
The flow area at the location where the Mach number is 0.9 = 25.24 cm².
<span>a. In the process of induction, metal objects are positive because electrons are pushed out of the object to the earth. The mass of the object decreases by an amount equal to the mass of the electrons leaving the metal object.</span>
b. <span>During the induction process, electrons are drawn from the earth to the object, so that the metal object becomes negative. <span>The mass of the object increases by an amount equal to the mass of "excess" electrons dragged onto the object.</span></span>
Answer:
an open system
Explanation:
which is contrasted with the concept of an isolated system which exchanges neither energy, matter, nor information with its environment.
Answer:
The energy of each photon can be transformed into kinetic energy and as this energy does not change, the energy of both photoelectrons remains constant,
Explanation:
The photoelectric effect was explained by Einstein, who assumed that the lz is made up of particles called photons each of a given energy, therefore the photoelectric effect can be explained as a collision of particles.
From this explanation we see that the intensity is proportional to the number of existing particles, when we double the intensity we double the number of particles, but the energy of each particle does not change, therefore if we use the conservation of energy.
The energy of each photon can be transformed into kinetic energy and as this energy does not change, the energy of both photoelectrons remains constant, only the number of electrons expelled changes.