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Brut [27]
3 years ago
15

Which collects light in a reflecting telescope?

Physics
2 answers:
Temka [501]3 years ago
8 0

Answer: Option a, concave lens.

Explanation: The object that collects the light in a reflecting telescope is "kinda" concave lens that collects the light and directs it to a mirror, that is where the observer can see. So the correct answer is option a.

Alecsey [184]3 years ago
4 0
Concave lens. These are used in making the objectives of reflection telescopes
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Perform the following mathematical operation and report answer to the correct number of significant figures 143.6 divided by 21.
Svetllana [295]

The answer to the correct number of significant figures is 6.774.

<h3>What is quotient?</h3>

When a number(big) divided smaller number, the answer obtained greater than zero is called a quotient.

Divide 143.6 ÷ 21.2

143.6/21.2 = 1436/212

                  =6.77358

The quotient is rounded to three significant figures after decimal

143.6 ÷ 21.2 = 6.774

Thus, the answer to the correct number of significant figures is 6.774

Learn more about quotient

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When tuning a guitar, by comparing the frequency of a string that is struck against a standard sound source (of known frequency)
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A jet of water of cross section area and velocity v impinges normally on a stationary flat plate the mass per unit volume of wat
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Explained in the attachment !

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2 years ago
Suppose your walking speed is 2m/s in a period of 1 s . What is your acceleration?
Veronika [31]

Answer:

<h2>2 m/s²</h2>

Explanation:

The acceleration of an object given it's velocity and time taken can be found by using the formula

a =  \frac{v}{t}  \\

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From the question we have

a =  \frac{2}{1}  \\

We have the final answer as

<h3>2 m/s²</h3>

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