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Juli2301 [7.4K]
3 years ago
9

Which event is part of a convince part of a current in the air

Physics
2 answers:
pogonyaev3 years ago
7 0

Answer:

D

Explanation:

Cool air sinks because it's denser and warm rises because it's less dense.

This is the principle you have in your air conditioning.

As the air is cooled it keeps falling that's why it's necessary to tilt the vents of of an AC at 45° so that the cold air would be well circulated.

Effectus [21]3 years ago
4 0
The answer is B for sure !
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which element is reactive an element whose atoms atoms have seven valence electrons or a element whose atoms have eight valence
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Elements with 7 valence electrons are extremely reactive, while elements with 8 valence electrons practically don't react at all.

This is caused by the fact that all molecules want to have 8 valence electrons; that's just the scientific fact. So, if an element already has 8 valence electrons, it doesn't need to react with anything. If the element only has 7 valence electrons, however, it really wants to react with something with 1 valence electron to get to that special number 8.
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What is a vibration?
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A motion of particles quickly moving back and forth a point of equilibrium
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3 years ago
a point charge q1 is held stationary at the origin. a second charge q2 is placed at point a, and the electric potential energy o
Gnoma [55]

The electric potential energy of the pair of charges when the second charge is at point b is U at b = +7.3×10⁻⁸J.

Electric potential is the amount of work done in moving point charge from infinity to aspecific point.

Calculation of the electric potential energy:

Here the particle should be moved from the point at the time when the potential energy should be U a

The U b should be the change in the potential energy

W is work done.

(W at a )-(W at b)  = U a - U b

U b = U a - (W at a )+(W at b)

So,

= 5.4 × 10⁻⁸J - ( -1.9×10⁻⁸ J)

= +7.3×10⁻⁸J.

Learn more about electric potential here:

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8 0
1 year ago
Why are metalloid used for making superconductor ?​
Papessa [141]

Answer: The Type 1 category of superconductors is mainly comprised of metals and metalloids that show some conductivity at room temperature. They require incredible cold to slow down molecular vibrations sufficiently to facilitate unimpeded electron flow in accordance with what is known as BCS theory.

5 0
3 years ago
One afternoon, a couple walks three-fourths of the way around a circular lake, the radius of which is 2.08 km. They start at the
Arada [10]

Answer:

Explanation:

a ) Distance travelled by them = 3 / 4 x 2π R where R is radius of the circular path .

= .75 x 2 x 3.14 x 2.08

= 9.8 km approx

b )

Displacement = shortest distance between final and initial position

= √2 R

= 1.414 x 2.08

= 2.94 km approx

c ) The direction of displacement is towards north east

so the direction is 45° north of east .

6 0
3 years ago
Read 2 more answers
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