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An open ended U-tube with a uniform cross section equal to 1 cm2 and height 100 cm on both sides is mounted on a stand in the lab. The tube is filled with mercury to a height of 50 cm on both sides when the barometric pressure in the lab is 750 Torr. The left side of the tube is then sealed and the right side is connected to a vacuum pump and evacuated to a pressure of essentially zero Torr. (a) What distance in cm does the mercury level fall from its original position on the left side of the tube? Hint: Set up and solve a quadratic equation. (b) What is the final pressure in Torr of the air trapped in the left side of the tube?

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6ya6ya
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PartsCenter
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SOURCE: Kohler bathtub spa does not work at all

If the air tube is still connected to the air button on the side of the tub and you are pushing it with no results then either the motor is no good, the air button is no good or the air switch in the box is no good.
process of elimination, start with the pump. take the switch off the motor or out of the box and make sure you can get the motor to come on. If the motor comes on then move to the air switch and hook it back up and see if you can blow into the air switch with a new air button or a straw and see if the switch will activate the pump. if it does then you most likely have a bad air button ($12). If you cannot get it to activate the pump then the air switch is bad ($21).

Posted on Feb 24, 2009

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SOURCE: need to level my kenmore 25 cu side by side-don't have a manual

take of your front kickplate you see the leveling screws on either side

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SOURCE: rear air suspension is not at level left is higher than the right

I have the exact same problem but my Left side is "Lower" than the right side.... Go Figure, Let's switch Solenoid's... Lol. I haven't seen a fix for this yet... there is 1 ride height sensor bolted to the rear but it's for both sides. the following site seems to be recommended by most Expo owners on all of the ford forums.. Check them out.
http://www.suncoreindustries.com/english-ford-expedition-97-02-air-suspension.html

Posted on Aug 01, 2009

nonontech
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SOURCE: 2x2-3x+5=0 solving the quadratic equation

Here you are :
2X2-3x+5=0 => 4-3x+5=0; (2X2=4) => -3x+9=0; (4+5=9) => 9 = 3x; (-3x moved to the right-hand side and it became 3x) => 9/3=x; (3 moved to the right hand side, so it becomes 1/3, i.e 1/3X9= 9/3) i.e. x=9/3 => x=3
Hence x equals to 3.

You can add or remove the explanation/description, I simply add them to make you understand.
If you need help, let me know.

Good luck.

Thanks for using FixYa.

Posted on Oct 08, 2010

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1 Answer

Can you help me i need a pump that will produce 1 GPM thru 250' x 1/2" tubing @ 10psi


You can convert pipe size to gallons per minute of flow by calculating the cross-sectional area of the pipe and making some reasonable assumptions about pipe volume and the rate of flow. Pipe sizing is measured by the internal diameter of the pipe, not the overall outside diameter. Once determined, the overall volume can be calculated. Pipe flow is described in gallons per minute. Shorter lengths of pipe will have a greater flow than a longer length of the same diameter. This is caused by internal resistance of the pipe itself. By the same reasoning a larger diameter pipe will have a greater flow or GPM than a smaller pipe at the same pressure or flow rate. Pressure is described as pounds per square inch. The square-inch measurement is determined by the area of the pipe. The pounds are the amount of force that is placed on the liquid to push it through the enclosed space.With that background, you can estimate the flow based on the pipe size.
Find the cross-section area of the pipe. Area is equal to pi times the radius squared or a = 3.14 x r2. A two-inch diameter pipe would have a cross-section area of 3.14 x 12 or 3.14 square inches.
Understand that water has a certain pressure associated with the height of that water. One pound of water pressure, or 1 PSI, is equal to 2.31 feet of elevation in height. In other words, a 1-inch column or pipe of water that is 2.31 feet high will have a pressure of 1 PSI. The overall height -- not volume -- of the pipe corresponds to the pressure. A 6-inch diameter pipe that is 2.31 feet high will only have 1 PSI.
Find the volume of the 2-inch diameter pipe in Step 1 that has a length of 10 feet. Ten feet is equal to 120 inches. Multiply 3.14 square inches, the cross sectional area, times the length. The volume of the pipe is equal to 376.8 cubic inches of volume.
Convert cubic inches into cubic feet. One cubic foot equals 1,728 cubic inches. Divide 376.8 cubic inches by 1,728 cubic inches per cubic foot and the answer is .218 cubic feet. This means that the 2-inch diameter pipe that is 10 feet long has an internal volume of .218 cubic feet.
Calculate the amount of water that can be contained in the section of pipe at any given time. One cubic foot of water is equal to 7.48 gallons. Multiply 7.48 gallons by .218 cubic feet and the amount of water in the pipe is equal to 1.63 gallons.
Find the GPM if the flow of water is one foot per second. Multiply the one-foot per second flow by 60 seconds per minute and the flow is now 60 feet per minute. In other words the water will flow through the 10-foot pipe six full volumes for every minute. Since the piping contains 1.63 gallons per 10 feet of pipe, multiply 1.63 by six and the final GPM is equal to 9.78 GPM of water flow from the 2-inch diameter pipe.

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1 Answer

Find the perimeter of a square whose area is 1225 cm2


I could just give you the answer of 140 cm

but I think you need to know how I got this answer
A square is an object that has equal sides
area is calculated by length multiplied by width
so 1225 cm^2 area by using the square root of 1225 cm^2 gives you 35 cm
so each side is 35 cm and there are 4 sides so 35 cm +35 cm + 35 cm + 35 cm = 140 cm
If you are doing homework always show how you got the answer because in an exam having the working out shown can sometimes result in getting some marks even if you slipped up slightly and got the wrong answer.

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I'm removing this Whirlpool oven and want to replace it with a KitchenAid Model KEBS109BSS. Will the new KitchenAid fit in the existing cutout?


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How many inches equals 24mm length ?


An inch is defined as 2.54cm.
10mm = 1cm
24mm = 2.4 cm

Setting these up in a ratio we have:

1 inch x inches
--------- = ------------
2.54 cm 2.4 cm

cross-multiplying we get:

2.4 = 2.54x

Dividing both side by 2.54:

2.4
---- = x
2.54

x = 0.94488188976377952755905511811024...

Good luck.

Paul

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There are 100 cm in one m, so there are 10000 square cm in one square m.

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How would you represent the area of the base of the box?


Total Surface Areabox1.jpg

The total surface area is made up of three pairs of sides for a total of six sides.

We must find Areahw, which is the area of the side that is h by w.

Areahw = (h)(w)

We must find Areahl, which is the area of the side that is h by l.

Areahl = (h)(l)

We must find Areawl, which is the area of the side that is w by l.

Areawl = (w)(l)

Each of the above areas are present on two sides of the box. So, the total surface area is sum of twice each of these areas, that is:

Total Surface Area = 2(Areahw) + 2(Areahl) + 2(Areawl)


Example:

Let h = 3 cm, w = 5 cm, l = 8 cm

Areahw = (h)(w) = (3 cm)(5 cm) = 15 cm2
Areahl = (h)(l) = (3 cm)(8 cm) = 24 cm2
Areawl = (w)(l) = (5 cm)(8 cm) = 40 cm2

Total Surface Area = 2(Areahw) + 2(Areahl) + 2(Areawl)
Total Surface Area = 2(15 cm2) + 2(24 cm2) + 2(40 cm2)
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1 Answer

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