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3 years ago

What did the greeks call the mineral they found and why?

1 answer:

6 0

Ancient civilizations had a high demand for raw materials, like clay, diverse rocks and, most of all, metals. These were required for buildings, crafts, agriculture, their armed forces, financial concerns, art and culture. Clays and rocks produced by opencast mining primarily served for the production of bricks and building blocks, which were used for civil and hydraulic engineering.

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Two narrow slits, illuminated by light consisting of two distinct wavelengths, produce two overlapping colored interference patt

vivado [14]

Answer:

The ration of the two wavelength is $\frac{\lambda_1}{\lambda_2} = \frac{8}{3}$

Explanation:

Generally two slit constructive interference can be mathematically represented as

$\frac{y}{L} = \frac{m * \lambda}{d}$

Where y is the distance between fringe

d is the distance between the two slit

L is the distance between the slit and the wall

m is the order of the fringe

given that y , L , d are constant we have that

$\frac{m }{\lambda } = constant$

$\frac{m_1 }{\lambda_1 } = \frac{m_2 }{\lambda_2 }$

So $m_1 = 8$

and $m_2 = 3$

=> $\frac{m_2}{m_1} = \frac{\lambda_1}{\lambda_2}$

=> $\frac{8}{3} = \frac{\lambda_1}{\lambda_2}$

$\frac{\lambda_1}{\lambda_2} = \frac{8}{3}$

6 0

3 years ago

Your bike starts with an initial velocity of 1 m/s and you accelerate to 4 m/s in 6 seconds. How far did you travel while accele

garri49 [273]

Answer:

78 m

Explanation:

Initial v = 1 m/s

a = 4 m/s²

t = 6s

$x = v_{i} t + \frac{1}{2}at^{2} \\x = (1)(6) + \frac{1}{2} (4)(6)^{2} \\x = 6 + 72\\x = 78$

5 0

3 years ago

10points asap <br><br> A force of 30 N acts upon a 7 kg block. Calculate its acceleration.

nekit [7.7K]

Hello! Assuming that the only force acting on the mass is 30N...

Fnet = 30N
Fnet = ma (mass x acceleration)
ma = 30N
a = 30N / m
a = 30N / 7kg
a = 4.2857 m/s^2
a = 4 m/s^2

I hope this helps!

5 0

3 years ago

In Rutherford's experiment, which of the following proved that the

vampirchik [111]

Answer:

b) the alpha particles were found to be attracted to the nucleus

Explanation:

5 0

3 years ago

Reallly need help real quick

earnstyle [38]

If i am thanking right the answer wold be (b)

3 0

4 years ago