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sesenic [268]
4 years ago
11

A hypothesis can also be called

Physics
1 answer:
Oksanka [162]4 years ago
3 0
An educated guess pretty much

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Location X is next to Location Y and they are both much colder than Location Z. Which statement is most likely true?
Dahasolnce [82]
Locations X and Y are at the poles. Hope this helps!
3 0
4 years ago
As a block of mass 42 kilograms drops from the edge of a 40-meter-high cliff it experiences a loss of energy due to air resistan
JulsSmile [24]

Answer:

<em>The block hits the ground at 27.9 m/s</em>

Explanation:

<u>Gravitational Potential Energy (GPE)</u>

It's the energy stored in an object because of its height in a gravitational field.

It can be calculated with the equation:

U=m.g.h

Where m is the mass of the object, h is the height with respect to a fixed reference, and g is the acceleration of gravity or 9.8 m/s^2.

When the block is at the edge of the cliff it has potential energy that can be transformed into any other type of energy as it starts falling to the ground.

The GPE of the block of mass m=42 Kg at h=40 m is:

U = 42*9.8*40

U = 16,464 J

The block loses 81 J due to air resistance, thus the energy stored when it hits the ground is 16,464 J - 81 J = 16,383 J.

This energy is stored as kinetic energy, whose formula is:

\displaystyle K=\frac{1}{2}mv^2

Solving for v:

\displaystyle v=\sqrt{\frac{2K}{m}}

\displaystyle v=\sqrt{\frac{2*16,383 }{42}}

v=\sqrt{780.143}

v = 27.9 m/s

The block hits the ground at 27.9 m/s

5 0
3 years ago
If you were going to build a nuclear power plant why wouldn't you build it in the middle of a desert
Tems11 [23]
You won't be able to get enough water for the reactor core cooling (you can use other methods , but more expensive) . The desert temprature is high at day, which will require additional cooling techniques to avoid over-heating the plant. Transmitting the electricity to the industrial , commercial and residual areas will cost more money, as you will need more transmission lines. Transporting the fuel to the desert will cost more at most.

Mostly this plants are established near seas.

6 0
4 years ago
The weld bead in SMAW is formed by the?
SVETLANKA909090 [29]
The answer is C I just took this quiz.
7 0
3 years ago
• 0.4kg<br> • 2.5kg<br> •10kg<br> •250kg<br><br> Please help
Verdich [7]
P=mv
m=p/v
m=10/25
=0.4 kg
5 0
4 years ago
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