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4 years ago

Liquids and gases transfer heat by ____.

Physics

2 answers:

Stels [109]4 years ago

6 0

Answer:

b). convection

Explanation:

Heat or thermal energy can be transferred by conduction, convection or radiation.

when medium is rigid and molecules can not move then the most preferred way is conduction mode of heat transfer which is only possible in solids

While in liquids and gases all the molecules are not strongly connected to each other so when energy is transferred to them then molecules start moving and then transfer the energy along with it.

this mode of heat transfer is known as convection mode of heat transfer

So most favourable mode of heat transfer in liquids and gases is convection mode of heat transfer.

vodka [1.7K]4 years ago

3 0

Fluids always transfer heat by convection. So, your answer is B. That's how a oven works actually!

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Answer:

1.) 15hrs per week = $97.50

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Explanation:

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3 years ago

Can include a single word part on one side , with the meaning on the other side . Stephen can test himself or can enlist the hel

BARSIC [14]

Incomplete question; Full question read;

Type the correct answer in the box. Spell all words correctly. Stephen is a student who wants to test his knowledge of medical terminology. Which option could he use?

For medical terminology, ___________ can include a single word part on one side, with the meaning on the other side. Stephen can test himself or can enlist the help of someone else to hold them up to test him.

Answer:

Flashcard

Explanation:

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3 years ago

If the mass of the ladder is 12.0 kgkg, the mass of the painter is 55.0 kgkg, and the ladder begins to slip at its base when her

Marysya12 [62]

Answer:

μ = 0.336

Explanation:

We will work on this exercise with the expressions of transactional and rotational equilibrium.

Let's start with rotational balance, for this we set a reference system at the top of the ladder, where it touches the wall and we will assign as positive the anti-clockwise direction of rotation

fr L sin θ - W L / 2 cos θ - W_painter 0.3 L cos θ = 0

fr sin θ - cos θ (W / 2 + 0,3 W_painter) = 0

fr = cotan θ (W / 2 + 0,3 W_painter)

Now let's write the equilibrium translation equation

X axis

F1 - fr = 0

F1 = fr

the friction force has the expression

fr = μ N

Y Axis

N - W - W_painter = 0

N = W + W_painter

we substitute

fr = μ (W + W_painter)

we substitute in the endowment equilibrium equation

μ (W + W_painter) = cotan θ (W / 2 + 0,3 W_painter)

μ = cotan θ (W / 2 + 0,3 W_painter) / (W + W_painter)

we substitute the values they give

μ = cotan θ (12/2 + 0.3 55) / (12 + 55)

μ = cotan θ (22.5 / 67)

μ = cotan tea (0.336)

To finish the problem, we must indicate the angle of the staircase or catcher data to find the angle, if we assume that the angle is tea = 45

cotan 45 = 1 / tan 45 = 1

the result is

μ = 0.336

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4 years ago

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3 years ago

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Answer:

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