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3 years ago

How does density play a part in convection currents? Explain. (I NEED THE ANSWER ASAP)

Physics

2 answers:

vlada-n [284]3 years ago

8 0

Answer:

Density tells how fast the process of convection plays out.

Explanation:

Convection is the process at which hot gas rises, releases energy, cools, then sinks back down.

If you have a very dense system of gas such as the sun convection happens much faster becuase the strong gravity of the sun compacts gas and hot gas rises quickly and cold gas sinks quickly as well.

I hope that makes sence.

Spiky Bob

Have an excellent day.

lyudmila [28]3 years ago

5 0

Answer:

Convection is heat transfer due to a density differential within a fluid

Example:

The current begins when the air over the hot sand is heated and begins to rise because of its lowered density. Air from above the ocean is colder and more dense. This cooler air takes the place of the rising hot air from over the sand

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barxatty [35]

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4 years ago

Does displacement = Δx?

Volgvan

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8 0

3 years ago

Read 2 more answers

The third one pls help

Nadya [2.5K]

Answer:

20 ms¯¹

Explanation:

3. Determination of the final velocity

From the question given above, the following data were obtained:

Time (t) = 4 s

Acceleration (a) = 5 ms¯²

Initial velocity (u) = 0 ms¯¹

Final velocity (v) =?

Acceleration is simply defined as the change in velocity per unit time.

Mathematically, it can be expressed as:

Acceleration (a) = final velocity – Initial velocity / time

a = v – u / t

With the above formula, we can obtain the final velocity of the car as follow:

Time (t) = 4 s

Acceleration (a) = 5 ms¯²

Initial velocity (u) = 0 ms¯¹

Final velocity (v) =?

a = v – u / t

5 = v – 0 / 4

5 = v / 4

Cross multiply

v = 5 × 4

v = 20 ms¯¹

Thus, the final velocity of the car is 20 ms¯¹

7 0

3 years ago

People often live on barrier island even though there not permanent why aren't they permanent

Arlecino [84]

They are dynamic, with winds and waves constantly reworking and moving the barrier island sand.

Changes in sea level also affect these islands.

Most scientists agree that sea level has been gradually rising over the last thousand years, and this rise could be accelerating today due to global warming.

Rising sea level causes existing islands to migrate shoreward.

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4 years ago

A wheel rotates about a fixed axis with a constant angular acceleration of 3.3 rad/s2. The diameter of the wheel is 21 cm. What

AleksandrR [38]

Answer:

The the linear speed (in m/s) of a point on the rim of this wheel at an instant=0.418 m/s

Explanation:

We are given that

Angular acceleration, $\alpha=3.3 rad/s^2$