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MArishka [77]
3 years ago
13

Why does mining considered the most important industry?

Physics
2 answers:
bagirrra123 [75]3 years ago
7 0
States resources / info
Anvisha [2.4K]3 years ago
4 0

Answer:

it makes most recourses and gives us most of a materials

Explanation:

You might be interested in
A cycle track is 500 metres long. Amy completes 10 laps. She travelled at an average speed of 12.5 metres per second. She puts o
yanalaym [24]
The fast lap is irrelevant to the question, because it didn't happen
until after the 9 laps that you're interested in.

To be perfectly technical about it, we don't actually have enough
information to answer the question.  You told us her average speed
for 10 laps, but we don't know anything about how her speed may
have changed during the whole 10 laps.  For all we know, maybe
she took a nap first, and then got up and drove 10 laps at the speed
of 125 metres per second.  That would produce the average speed
of 12.5 metres per second and we would never know it  Why not ?
That's only 280 miles per hour.  Bikes can do that, can't they ?

IF we can assume that Amy maintained a totally steady pace through
the entire 10 laps, then we could say that her average for 9 laps was
also 12.5 metres per second.
5 0
3 years ago
The angle of incidence of a light beam in air onto a reflecting surface is continuously variable. The reflected ray is found to
Mariana [72]

Answer:

  n = 2.0686

Explanation:

When an unpolarized ray of light is reflected on a surface, the reflected ray is partially polarized, complete polarization occurs when it is true that between the transmitted and reflected ray one has 90, the relationship is

        n = so tea

 let's calculate

        n = tan 64.2

        n = 2.0686

8 0
3 years ago
Help me please this is for physics
Yuri [45]
<h2>Hello there! :)</h2>

It's a pleasure to be helping you today with your<u> physics question!</u>

Answer:

23.1m/s

Explanation:

We want to find the initial speed of the ball.

To do this, we have to apply the formula for the time of flight of a projectile:

T=\frac{2_{v0~sin 0} }{g}

where θ = angle of flight

g = acceleration due to gravity

v0 = initial speed

Therefore, substituting the given values into the formula, we have that:

\boxed{4.2=\frac{2~x~_{v0~sin63} }{9.8}}

⇒ 2 ×_{v0} ×0.8910= 9.8 × 4.2

⇒\boxed{{v0}=\frac{9.8~times~4.2}{2~times~0.8910}}

\boxed{{v0} =23.1m/s}

That is the initial speed of the ball.

<em />

<em>I hope this helps you!</em>

<em>Good Luck with your Assignment!</em>

3 0
2 years ago
A leaf falls thorough the air, floating as it falls. Air resistance is visible affecting the leaf . Which two properties of the
vaieri [72.5K]

The two properties of the leaf that allow it to be affected by air resistance include its distance from the ground and its mass.

<h3>What is mass?</h3>

Mass is a scalar quantity that measures the inertia of a given body and/or object, which represent one of the most important characteristics of the matter.

This measurement (mass) may affect the flight of an object because mass inertia is associated with gravity and does not allow its movement.

In conclusion, the two properties of the leaf that allow it to be affected by air resistance include its distance from the ground and its mass.

Learn more about mass and inertia here:

brainly.com/question/1140505

#SPJ1

3 0
2 years ago
HELP
olganol [36]
All the 4 processes are correct answer to change the state of matter. Hope it helps.
8 0
3 years ago
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