Answer:
A)
2. very cool but very luminous
6. found in the upper right of the H-R diagram
B)
1. The majority of stars in our galaxy
5. the Sun, for example
7. a very hot and very luminous star
C)
3. not much larger in radius than Earth
4. very hot but very dim
Explanation:
Main-sequence stars :
Main-sequence stars are the star which having hydrogen in the core and also having stable inward and outward force.
White dwarfs :
This is also a star like the sun .The temperature of these type of star above 100,000 Kelvin.The mass of White dwarfs is less than the sun but slightly more than earth.
Red giant or supergiant stars :
This is the biggest star in the universe.When a star does not having hydrogen fuel in the core then Red giant or supergiant stars are formed.
A) 2 ,6
B) 1 , 5 ,7
C) 3 ,4
Answer:
The distance from charge 5 μ C = 26.45 cm and the distance from - 4 μ C is 23.55 cm.
Explanation:
Given that
q₁ = 5 μ C
q₂ = - 4 μ C
The distance between charges = 50 cm
d= 50 cm
Lets take at distance x from the charge μ C ,the electrical field is zero.
That is why the distance from the charge - 4 μ C = 50 - x cm
We know that ,electric field is given as
![E=K\dfrac{q}{r^2}](https://tex.z-dn.net/?f=E%3DK%5Cdfrac%7Bq%7D%7Br%5E2%7D)
![K\dfrac{5\ \mu}{x^2}=K\dfrac{4\mu }{(50-x)^2}\\\\\dfrac{5}{x^2}=\dfrac{4 }{(50-x)^2}\\\\\\5(50-x)^2=4x^2\\(50-x)^2=0.8x^2\\\\50-x =0.89x\\\ x=\dfrac{50}{1.89}\ cm\\\\\\x=26.45\ cm\\](https://tex.z-dn.net/?f=K%5Cdfrac%7B5%5C%20%5Cmu%7D%7Bx%5E2%7D%3DK%5Cdfrac%7B4%5Cmu%20%7D%7B%2850-x%29%5E2%7D%5C%5C%5C%5C%5Cdfrac%7B5%7D%7Bx%5E2%7D%3D%5Cdfrac%7B4%20%7D%7B%2850-x%29%5E2%7D%5C%5C%5C%5C%5C%5C5%2850-x%29%5E2%3D4x%5E2%5C%5C%2850-x%29%5E2%3D0.8x%5E2%5C%5C%5C%5C50-x%20%3D0.89x%5C%5C%5C%20x%3D%5Cdfrac%7B50%7D%7B1.89%7D%5C%20cm%5C%5C%5C%5C%5C%5Cx%3D26.45%5C%20cm%5C%5C)
Therefore the distance from charge 5 μ C = 26.45 cm and the distance from - 4 μ C is 23.55 cm.
Answer: 66.29%
Explanation:
Efficiency = work output / work input x 100 %
Work output = 822J
Work input = 1240 L
E = 822/1240 x 100
E = 0.6629 x 100
E = 66.29%
Answer:
Nuclear power does not contribute to climate change
Explanation:
Momentum is always conserves in a collision, so 2460*130 + 1225*89 = total momentum. After the collision, you can treat the two vehicles as one mass and divide momentum by mass to obtain velocity. 428825/3685 = 116.37 km/hr. Closest answer is B