Can solids undergo convection

1 answer:

5 0

No because solids can't transmit heat by convection, and convection only works because of hotter and quicker moving molecules have a lower density so they rise to the surface. But in a solid, the molecules can't move relative to each other. They only vibrate :)

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If 5 liters cost $2.50, then how much would it cost for 9 liters?

damaskus [11]

5:$2.50

9:?

divide 5 by both sides cause you wanna see how much is 1 liter so you can multiply that with 9.

5 divided by 5 is 1.

$2.50 divided by 5 is $0.50

1:$0.50

each liter costs $0.50

Multiply $0.50 with 9 and that is $4.50

the answer is $4.50

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4 years ago

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Katen [24]

This would be set up as: 6/ = 25/100
so we have to cross multiply 6*100= 600 then 600 divided by 25= 24
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if someone apply to 5 different colleges and 4 different majors how many different scenarios are there

svetoff [14.1K]

Answer:

He can apply for 4 different majors at each college giving

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3 years ago

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saw5 [17]

Answer:

4456781

Step-by-step explanation:

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3 years ago

Find two unit vectors orthogonal to both given vectors. i j k, 4i k

Maurinko [17]

The cross product of two vectors gives a third vector $\mathbf v$ that is orthogonal to the first two.

$\mathbf v=(\vec i+\vec j+\vec k)\times(4\,\vec i+\vec k)=\begin{vmatrix}\vec i&\vec j&\vec k\\1&1&1\\4&0&1\end{vmatrix}=\vec i+3\,\vec j-4\,\vec k$

Normalize this vector by dividing it by its norm:

$\dfrac{\mathbf v}{\|\mathbf v\|}=\dfrac{\vec i+3\,\vec j-4\,\vec k}{\sqrt{1^2+3^2+(-4)^2}}=\dfrac1{\sqrt{26}}(\vec i+3\,\vec j-4\vec k)$

To get another vector orthogonal to the first two, you can just change the sign and use $-\mathbf v$ .

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3 years ago