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Q: What diameter must a 18.0 m long air duct have to replenish the air in a room 9.0 m 8.0 m 4.0 m every 10 min. Assume the pump can exert a gauge pressure of 0.71x10-3?
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Do you multiply when you find the diameter?

I assume you want the formula for finding the circumference of a circle with a known diameter?The formula is C = pxdC = Circumferencep = Pi (3.14)d = DiameterFor example: with a diameter of 6 : 3.14 x 6 = 18.84


What is the perimeter of Mars?

I suggest you assume it is a sphere, look up its diameter, and multiply that by pi. That should be close enough.


If a watch is 44 diameters how many inches is that?

I assume you mean 44mm diameter. 1 inch = 25.4mm 44mm = 1.73 inches


What would the area and perimeter be if the diameter is 6cm?

You said "diameter", so we'll assume that you're talking about a circle.Circumference of a circle (distance around, 'perimeter') = (pi) x diameter = 6 pi = 18.85 cm (rounded)Area of a circle = (pi) R2 = (pi) x (1/2 of the diameter)2 = 9 pi = 28.27 cm2 (rounded)


What does the surface area of an object have to do with the amount of pressure it can exert?

It only has to do with the surface area in contact with the support force (the side or surface that is in contact with the ground, table, etc.). If you have two cans, each with 3 solid bricks on top of them. One can has a diameter of 3 cm, while the other has a diameter of 5 cm. Which one has greater pressure? The can with a diameter of 3 cm. This is because there is less surface area in contact with the support force, so there is less area to distribute the force. Pressure is inversely related to area. Remember that pressure is measured in Pascals. Pressure is equal to Force over Area or p=F/A. Assuming that both cans have the same weight with the bricks on top. Lets assume each weighs 5 kilograms. So the pressure for the 5 cm can would be 5 kg (weight) * 9.8 (Gravity force) / 5 cm * pi (Area) or about 3.12 Pascals. Our 3 cm can would be 5 kg * 9.8 / 3 cm * pi or about 5.20 Pascals.

Related questions

How do you find the area using the diameter?

I assume that you are referring to the area of a circle. You divide the diameter in half to find the radius and then you put it into the formula.


What star is only about 20 km?

Diameter, I assume. That would be a neutron star.


How many linear INCHES in a 37 inch diameter circle?

I assume you want the circumference which is pi times the diameter, so for 37 inch diameter the circumference would be about 116.24 inches.


What is the partial pressure of nitrogen in air at 1 atmosphere pressure Assume ideal behavior.?

In dry air, nitrogen constitutes about 78% of the atmosphere by volume. Therefore, at 1 atmosphere pressure, the partial pressure of nitrogen would be 0.78 atm. This is calculated by multiplying the total pressure by the mole fraction of nitrogen in air.


If a circle has a circumference of 100 feet what is the width?

With "width", I assume you mean what is commonly called the diameter - the distance through the center. The circumference is diamter x pi, therefore, the diameter is the circumference divided by pi. In other words, just divide the circumference by 3.14, approximately.With "width", I assume you mean what is commonly called the diameter - the distance through the center. The circumference is diamter x pi, therefore, the diameter is the circumference divided by pi. In other words, just divide the circumference by 3.14, approximately.With "width", I assume you mean what is commonly called the diameter - the distance through the center. The circumference is diamter x pi, therefore, the diameter is the circumference divided by pi. In other words, just divide the circumference by 3.14, approximately.With "width", I assume you mean what is commonly called the diameter - the distance through the center. The circumference is diamter x pi, therefore, the diameter is the circumference divided by pi. In other words, just divide the circumference by 3.14, approximately.


Do you multiply when you find the diameter?

I assume you want the formula for finding the circumference of a circle with a known diameter?The formula is C = pxdC = Circumferencep = Pi (3.14)d = DiameterFor example: with a diameter of 6 : 3.14 x 6 = 18.84


What is the deffinition of pi?

I assume that you mean "the 'definition' of pi", which is the circumference of a circle divided by it's diameter (c/d).


What is the perimeter of Mars?

I suggest you assume it is a sphere, look up its diameter, and multiply that by pi. That should be close enough.


How do you convert a differential pressure of 43 psi to absolute units?

To convert the differential pressure of 43 psi to absolute pressure, you would add the atmospheric pressure to the differential pressure. On average, atmospheric pressure at sea level is about 14.7 psi. So, adding 43 psi to 14.7 psi gives an absolute pressure of approximately 57.7 psi.


What is the symbol for pressure when measured in pascals?

The symbol for pressure when measured in pascals is "Pa".


If a watch is 44 diameters how many inches is that?

I assume you mean 44mm diameter. 1 inch = 25.4mm 44mm = 1.73 inches


As pressure increase what does volume do?

As pressure increases, volume decreases. This relationship is described by Boyle's Law, which states that at constant temperature, the pressure and volume of a gas are inversely proportional to each other.