Explain what happens to the average kinetic energy, thermal energy, and temperature of a substance when the particles in the sub
2 answers:
Answer:
Average kinetic energy decreases
Thermal energy decreases
Temperature decreases
Explanation:
As the particles in a substance slow down then the kinetic energy of all the molecules will decreases.
As we know that kinetic energy is given as
As we know that sum of kinetic energy of all the molecules is the molecules is known as internal thermal energy.
So here since kinetic energy decreases so internal thermal energy also decreases.
Now as we know that total internal thermal energy directly depends on temperature as
so here as internal thermal energy decreases so its temperature also decreases.
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Disk of dust and gas contains the new born stars and as well as young stars and the Halo region contains the old stars.
The different regions of a spiral galaxy like our Milky way tend to have characteristic populations of stars.
Halo: The halo tends to have older, red stars. In general, blue stars are larger but since they are also hotter, tend to run through their fuel faster and have shorter lives. Halo stars tend to be older stars, The halo is generally lacking in dust and low in metals.
Bulge: The outer Area of the bulge has mostly older red stars. The inner bulge has active star formation and has a mix of red and blue stars.
Disk: The disk has active star formation regions, so there are young blue stars in that region. Here are the stars that are both old stars and young stars. The blue stars are largely found on the edges of the spiral arms.
Thus disk with the dust clouds contains new and young stars. And halo region contains old stars.
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Answer:
Explanation:
When a charged particle moves perpendicularly to a magnetic field, the force it experiences is:
where
q is the charge
v is its velocity
B is the strength of the magnetic field
Moreover, the force acts in a direction perpendicular to the motion of the charge, so it acts as a centripetal force; therefore we can write:
where
m is the mass of the particle
r is the radius of the orbit of the particle
The equation can be re-arranges as
where in this problem we have:
is the magnitude of the charge of the electron
is the strength of the magnetic field
The beam penetrates 3.45 mm into the field region: therefore, this is the radius of the orbit,
is the mass of the electron
So, the electron's speed is