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3 years ago

Calculate the refractive index of the substance if the speed of light in the medium is 210,000 km/s.

Physics

1 answer:

Rainbow [258]3 years ago

6 0

0.7 is the correct answer

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When a chemical reaction occurs,

mel-nik [20]

A) reactants interact to form products with different chemical and physical properties

3 0

2 years ago

In loading a lorry, a man lifts boxes each of weight 100N through a height of 1.5m.

liq [111]

Answer:

The amount of work done in order to lift the box is $150\ Joule$

Explanation:

Given the weight of each box is $100N$

And the man lifts boxes at a height of $1.5m$

We need to find the amount of work done.

The amount of work done is the product of applied force $F$ that causes the displacement $d$ .

In our problem force is $100N$ and displacement is $1.5m$ .

Now, work done

$=force\times displacement\\=100\times1.5\\=150\ Joule$

So, the amount of work done in order to lift the box is $150\ Joule$

5 0

3 years ago

What is the kinetic energy of a 150kg object that is moving with a speed of 15 m/s?

otez555 [7]

$ke = \frac{1}{2} \times m {v}^{2}$

so you :

$\frac{1}{2} \times 150 \times {15}^{2}$

= 16875 ( J )

8 0

2 years ago

A major obstacle to developing good human relations is that

OLEGan [10]

One major obstacle to developing good human relations is that man is fearful by nature. There are risks involved in developing human relations, and humans are mostly too scared to take those risks. Majority of humans are comfortable with staying in their own comfort zones, and would like to avoid the hassle of getting to know others.

3 0

3 years ago

How long would it take for a penny to fall from the top of the empire state building? the building is 381 meters tall.

NISA [10]

Here, S = ut + 1/2 at²
381 = 0*t + 1/2 * 9.8 * t²
762/9.8 = t²
t = √77.75
t = 8.82 sec

In short, Your Answer would be 8.82 s

Hope this helps!

8 0

3 years ago