How do scientists use a spectroscope to determine a star's composition? A. They study patterns in light bands that are separated from starlight by the spectroscope. B. They use the spectroscope to study sound waves that are traveling from the star. C. They use the spectroscope to create a man-made star that they study in a lab. D. They run tests on gas samples that the spectroscope collects from the star's core.

Answers

Answer 1

Answer:

The scientists use a spectroscope to determine a star's composition to study patterns in light bands that are separated from starlight.

What is a star?

A star is any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources.

Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths.

The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy.

Hence, the scientists use a spectroscope to determine a star's composition to study patterns in light bands that are separated from starlight.

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Answer 2

Answer:

Answer: They study patterns in light bands that are separated from starlight by the spectroscope.

Step-by-step explanation: Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths. The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy.

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Enter the value of n so that the expression (ny + 25.7) + (–45.2y + 13.9) is equivalent to (–33.7y + 39.6).

10x4 ones= how many ones

Answers

Answer:

There would be 40 ones in the given number.

Step-by-step explanation:

We are asked to find the number of ones in $10* 4\text{ ones}$ .

Upon expanding our given number, we will get:

$10* 4\text{ ones}=40\text{ ones}$

Therefore, there are 40 ones in our given number $10* 4\text{ ones}$ .

the answer is 40 because they're are 4 groups of ten so it would go like 10,20,30,and 40.=)

A cylinder has the circumfrence of 16 $\pi$ inches and its height is half the radius of the cylinder. What is the total surface area of the cylinder? Give your answer in terms of $\pi$ . Explain how you found your answer.

Answers

Circumference = 2 $\pi$ r
If the circumference of the base of the cylinder is 16 $\pi$ then
16 $\pi$ = 2 $\pi$ r
Divide by 2 on both sides.
8 $\pi$ = $\pi$ r
Divide by $\pi$ on both sides.
8=r

So our radius is 8. So the height of the cylinder is 8/2 = 4.

The surface area of a cylinder is
$SA=2\pi rh+2\pi r^2$

Just plug in r as 8 and h as 4.

$SA=2\pi (8)(4)+2\pi (8)^2$
$SA=2\pi 32+2\pi 64$
$SA=64\pi + 128\pi$
$SA=192\pi$

The surface area is ${\boxed{192\pi}$ .

Hey i need some help ill give you brainest 2. Ms. Juhal was making t-shirts. One of the designs had the instructions to make points at the following locations and then draw lines to connect the points in order: A ; B ; C ; and D .(a) Use graph paper to plot the points.
(a) Connect them in order: A to B, B to C, C to D, and then D back to A. What shape is created?
i need more sentences

Answers

a is the best way to find it if there is points involved so keep that in mind

What is 5 to the power of 6

Answers

to find the power of that you do this 5^6 = 15625

Sarah wrote that (3^5)^7 = 3^12. Correct her mistake. Write an exponential expression using a base of 3 and exponents of 5,7,12 that would make her answer correct.

Answers

$\left(3^5\right)^7=3^(5\cdot7)=3^(35)\neq3^(12)\n\n\n3^5\cdot3^7=3^(5+7)=3^(12)$

$(3^5)^7=3^(5\cdot7)=3^(35)\n \n3^5\cdot3^7=3^(5+7)=3^(12)$

If 5 miles = 8km. how many km in 250 miles?

Answers

250 miles is equivalent to 400 kilometers.

We have,

To find out how many kilometers are equivalent to 250 miles, we can set up a proportion using the given information that 5 miles are equal to 8 kilometers.

5 miles : 8 kilometers

We can set up the proportion:

5 miles / 8 kilometers = 250 miles / x kilometers

To solve for x (the number of kilometers in 250 miles), we can cross-multiply and then divide:

5 miles x (x kilometers) = 8 kilometers x 250 miles

5x = 2000

Dividing both sides by 5:

x = 400

Therefore,

250 miles is equivalent to 400 kilometers.

Learn more about unit conversion here:

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