Which of the following stars would be the most luminous?2. Yellow star
3. Red star
4. Blue star
5. Orange star

Answers

Answer 1
Answer: The correct answer to the question that is stated above is the fourth option which is :Blue star.
Blue stars are uncommon but very bright. It has an average luminosity of  
1,400,000 ( the Sun =1) with a strong UV continuum. The blue stars average mass is 60 ( the Sun =1) and its average radius is 15 ( the Sun =1).

Answer 2
Answer:

Answer: Blue star.

Explanation:


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The index of refraction of light varies from color to color. True or False?

Answers

The index of refraction of light varies from color to color. TRUE.

Please help me A person launches a home-built model rocket straight upinto the air at y = 0 from rest at time t = 0 . (The positive y-direction is upwards). The fuel burns out at t = t0. The position of the rocket is given by


with a0 and g are positive. Find the y-components of the velocity and acceleration of the rocket as a function of time. Graph ay vs t for 0 < t < t0.

Answers


-- We know that the y-component of acceleration is the derivative of the
y-component of velocity.

-- We know that the y-component of velocity is the derivative of the
y-component of position.

-- We're given the y-component of position as a function of time.

So, finding the velocity and acceleration is simply a matter of differentiating
the position function ... twice.

Now, the position function may look big and ugly in the picture.  But with the
exception of  't' , everything else in the formula is constants, so we don't even
need any fancy processes of differentiation.  The toughest part of this is going
to be trying to write it out, given the text-formatting capabilities of the wonderful
envelope-pushing website we're working on here.

From the picture . . . . . y (t) = (1/2) (a₀ - g) t² - (a₀ / 30t₀⁴ ) t⁶

First derivative . . . y' (t) = (a₀ - g) t  -  6 (a₀ / 30t₀⁴ ) t⁵  =  (a₀ - g) t  -  (a₀ / 5t₀⁴ ) t⁵

There's your velocity . . . /\ .

Second derivative . . . y'' (t) = (a₀ - g) -  5 (a₀ / 5t₀⁴ ) t⁴ = (a₀ - g) -  (a₀ /t₀⁴ ) t⁴

and there's your acceleration . . . /\ .
That's the one you're supposed to graph.

a₀ is the acceleration due to the model rocket engine thrust
     combined with the mass of the model rocket
'g' is the acceleration of gravity ... 9.8 m/s² or 32.2 ft/sec²
t₀  is how long the model rocket engine burns

Pick, or look up, some reasonable figures for a₀ and t₀
and you're in business.

The big name in model rocketry is Estes.  Their website will give you
all the real numbers for thrust and burn-time of their engines, if you
want to follow it that far.


Which of the following bodies has a brightness that surpasses Venus’? My options are Jupiter, Mars, the stars, and the Moon. Jupiter and mars are obviously out and Venus is brighter than all the stars in the sky (besides the sun lol) so it would be the moon right? just a lil confused.

btw i'm not sure what subject to post this in since there's no astronomy subject.

Answers

Answer: the Moon.

Explanation:

Brightness of celestial object is given in terms of magnitude. Apparent magnitude reflects how bright an object appears from the Earth. The apparent magnitude of the Moon is (-12.7 )greater than the apparent magnitude of the Venus (-4.4). The more negative value, the brighter is the object. Thus, the brightness of the moon surpasses the brightness of Venus.

Hi there!

The answer would be the stars. Since the sun is a star, the star is the answer. A star is much, much hotter than Venus, making it much brighter. 

Hope this helps!

After generating a hypothesis, a scientist next: A. designs a series of tests. B. formulates a theory. C. makes a prediction. D. writes a grant proposal. E. does an experiment.

Answers

The answer is (c) because

What is the apparent magnitude of the brightest star in the Big Dipper?

Answers

Answer: +1.77

Explanation:

Big dipper is the  asterism made of seven bright stars in Ursa Major constellation. An asterism a pattern formed by joining the bright stars in the night sky. On the other hand, whole night sky is divided into 88 areas called constellations. These asterisms are used to identify the constellations.

The brightest star of the big dipper is Alioth which is the 32nd brightest star in the night sky. Its apparent magnitude is +1.77.

The magnitude of Alioth ( the brightest star in the big dipper ) is 1.76 and it is about 81 light years distant from Earth. 

Who expressed particles by wave equations?

Answers

I believe it was famous quantum physicist Erwin Schrödinger