2 years ago

An example of forced convection is the movement of hot air by a fan. true or false?

Physics

2 answers:

kompoz [17]2 years ago

8 0

The answer is true. The blowing fan force the hot air to go through the process of convection .

MrRa [10]2 years ago

6 0

True

undergoing process of convection

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Q. No. 9 A body falls freely from the top of a tower and during the last second of its fall, it falls through 25m. Find the heig

HACTEHA [7]

Answer:

45.6m

Explanation:

The equation for the position y of an object in free fall is:

$y=-\frac{1}{2} gt^2+v_0t+y_0$

With the given values in the question the equation has one unknown v₀:

$v_0=\frac{y-y_0}{t}+\frac{1}{2}gt$

Solving for t=1:

1) $v_0=y-y_0+\frac{g}{2}$

To find the hight of the tower you can use the concept of energy conservation:

The energy of the body 1 sec before it hits the ground:

2) $E=\frac{1}{2}m{v_0}^2+mgy_0$

If h is the height of the tower, the energy on top of the tower:

3) $E=mgh$

Combining equation 2 and 3 and solving for h:

4) $h=\frac{{v_0}^2}{2g}+y_0$

Combining equation 1 and 4:

$h=\frac{{(y-y_0+\frac{g}{2}})^2}{2g}+y_0$

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What were some benefits to the american television from analog broadcast to digital broadcast?

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Answer:

nothing no no no

Explanation:

nothing cause no

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Hey! I found this question quite interesting. Check it out - https://www.meritnation.com/ask-answer/question/to-raise-a-200kg-st

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For this we use general equation for gases. Our variables represent:

p- pressure
v-volume
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in this equation we know:
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P2 = T2P1V1/T1V2 = 1.1atm

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