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Bad White [126]
3 years ago
11

Under which one of the following circumstances will heat transfer occur via convection? Group of answer choices Convection occur

s within metal objects. Convection only occurs in non-metallic solids. Convection occurs only within a vacuum. Convection occurs in the presence of a liquid or a gas. Convection can occur whether matter is present or not.
Physics
2 answers:
BartSMP [9]3 years ago
8 0

Answer:

1) in metal object heat transfer through the conduction .In vacuum heat transfer through only radiation .

In only gaseous state or in liquid state the heat transfer through convection hence option D is correct

Sever21 [200]3 years ago
8 0

Answer:

The answer is: Convection occurs in the presence of a liquid or a gas

Explanation:

Convection is a process by which heat is transmitted, either between two liquid or gaseous substances, provided they are at different temperatures.

Heat transfer occurs when there is a temperature gradient between the two bodies that are in direct contact; then, the heat flow flows from the hottest body to the least hot body. Liquids and gases are considered fluids.

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kirza4 [7]

At t =0, the velocity of A is greater than the velocity of B.

We are told in the question that the spacecrafts fly parallel to each other and that for the both  spacecrafts, the velocities are described as follows;

A: vA (t) = ť^2 – 5t + 20

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Given that t = 0 in both cases;

vA (0) = 0^2 – 5(0) + 20

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vB (0) = 0^2+ 3(0) + 10

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We can see that at t =0, the velocity of A is greater than the velocity of B.

Learn more: brainly.com/question/24857760

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