Answer:
Let lo be the length of the rod in the frame in which it is at rest and s' is the frame which is moving with a speed 0.8c in a direction making an angle 60° with x-axis. The components of lo along and perpendicular to the direction of motion are lo cos 60° and lo sin 60° respectively.
Now length of the rod along the direction of motion
= lo cos 60°_/1-(0.8) 2/c2
= lo/2×0.6
= 0.3 lo.
Length of the rod perpendicular to the direction of motion.
= lo sin 60°
=_/3/2 lo
Length of moving rod
l = [(0.3lo)2+{lo_/3/2} 2] 1/2
= 0.916 lo.
Percentage contraction
= lo-0.916lo/lo×100
= 8.4%.
Explanation:
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Definition of luminosity is the total amount of energy emitted by the star per unit of time. We can use following formula to calculate the luminosity:
Where A is the surface area of the star.
We also have a very important mass-luminosity relationship:
This formula gives us relationship between stars mass and it's luminosity.
stands for Sun's luminosity and mass.
We can rewrite the luminosity formula like this:
Now if we divide this by the Sun's luminosity we get:
We can use this formula to estimate the mass. Surface temperature of the Sun is <span>5778 K.
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The answer would be 2 solar masses.
Non-foliated metamorphic rocks are rocks that have been changed by heat and pressure into rocks with a non-layered or banded appearance. Some examples of non-foliated metamorphic rocks include quartzite, marble, amphibolite and hornfels.
Non-foliated metamorphic rocks are rocks that have been changed by heat and pressure into rocks with a non-layered or banded appearance. Some examples of non-foliated metamorphic rocks include quartzite, marble, amphibolite and hornfels.
Answer:
a hypothesis is testable then why would it be a hypothesis