Answer:
ABSOLUTE MAGNITUDE, C
Explanation:
Absolute magnitude is how bright the star is from a distance of 10 parsecs. Apparent magnitude is how bright the star appears from Earth, which can vary, because some stars may be farther or closer away. Age and size are not very accurate either. For example, at the end of their lifetimes, very big start may explode in a violent and bright supernova, and outshine the stars near them. As for size, as many stars several times smaller than the sun shine much brighter than it, making it inaccurate.
The correct answer is
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The 100 W bulb uses 2.5 times more energyIn fact, the power is the amount of energy used per unit of time. This means that the light bulb of 100 W uses 100 J in one second, and the light bulb of 40 W uses 40 J in one second, and if we compare the two numbers, we get
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<span>so, the 100 W light bulb uses 2.5 times more energy than the 40 W light bulb.</span>
It is called the atmosphere
Answer:
The stiffness of one of the individual spring is 390 N/m.
Explanation:
It is given that 43 identical springs are placed side-by-side and connected to a large massive block.
The stiffness of the 43 spring combination is 16770 N/m
We need to find the stiffness of one of the individual springs. Let k is the stiffness of one spring. The effective spring stiffness of this width spring is given by :
k = 390 N/m
So, the stiffness of one of the individual spring is 390 N/m. Hence, this is the required solution.
Answer:
Explanation:
Given the Kepler's third law
p² = a³
Given that,
Period of earth
P(earth) = 1 year
Distance of earth from sun
a(earth) = 1 A.U
An asteriod that is rotating round the sun is at a distance of 2A.U for the sun
a(asteroid) = 2 A.U
So, we want to calculate period of astronaut I.e. p(asteroid)
Using the Keplers law
p²/a³ = constant
p(earth)²/a(earth)³ = p(asteriod)²/a(asteroid)³
So, p(e)²/a(e)³ = p(a)²/a(a)³
1²/1³ = p(a)²/2³
1 = p(a)/8
p(a) = 8 years
Then, the asteroid will take 8years to round the sun