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nata0808 [166]
3 years ago
5

11. Reflecting telescopes are popular because they're _______ than a refracting telescope.

Physics
2 answers:
Anon25 [30]3 years ago
4 0
I do not know what the school expects as an answer, but advantage of reflecting telescopes is that there is only one major reflecting surface, so it is quite easy to create a 6 or 8 inch telescope by an amateur, after adding on a prism and an eyepiece.  (a microscope eyepiece could be used).
MY answer would be "easier to build".  (it still takes tens of hours to grind and polish the single plane surface to a parabolic surface).

Electromagnetic waves all have the same velocity in the same medium.  However, since frequencies vary widely, so do wavelengths.

lyudmila [28]3 years ago
4 0

for 11. the answer is they are D. easier to build. hope i helped (:

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From part a, you know that surface temperature is a stellar property that we infer indirectly. What must we measure directly so
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4 0
1 year ago
_ is where there are no particles or very few particles that are spaced out very far apart. (example: outer space)
irina1246 [14]
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4 0
3 years ago
If a 10kg block is at rest on a table and a 1200N force is applied in the eastward direction for 10 seconds, what is the acceler
gavmur [86]

Answer:

a = 120 m/s²

Explanation:

We apply Newton's second law in the x direction:

∑Fₓ = m*a Formula (1)

Known data

Where:

∑Fₓ: Algebraic sum of forces in the x direction

F: Force in Newtons (N)

m: mass (kg)

a: acceleration of the block (m/s²)

F = 1200N

m = 10 kg

Problem development

We replace the known data in formula (1)

1200 = 10*a

a = 1200/10

a = 120 m/s²

6 0
3 years ago
PLEASE HELP. I WILL MARK BRAINIEST
anyanavicka [17]
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