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Because needles density is higher than water
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∙ 14y ago
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Why can a sewing needle can float on the surface water in a glass?
Yes if the surface tension of the water is not broken. If you are careful you can place a needle on the surface of the water in a glass. Also if you reduce the surface tension with detergent (just a very little is enough) the needle will sink because it's density is greater than that of the water. NO (if the surface tension of the water is broken, a needle cannot float on the surface of water. This is because the needle has higher density than water (density is mass divided by volume).
What is a natural flow of water from underground?
a natural flow of water from underground
What are advantages and disadvantages of a needle valve?
The advantages of a needle valve include good flow control and the ability to allow high pressure ratings. The disadvantage is the higher risk of clogging because of the entrained solids.
How do you make a bigger blood flow in your penis?
by do an exersize dud <><><> Yeah, Exercises help, Try "Reverse" wanking your penis, it helps the blood to flow better. E.G, grab a Needle and prick your Finger, then "Reverse" wank your finger, more blood will comeout right? It helps the blood to flow. Just don't grab a needle and prick you penis 0.o that will hurt...
What is through flow in the water cycle?
through flow is when infiltrated water moves through soil to the sea.
Why does water not escape freely when a narrow-mouthed bottle is suddenly inverted?
Depending on the size of the mouth the water has to flow against the atmospheric pressure. If the bottle is full and the mouth is narrow enough then the water may not flow at all. That is why a hypodermic needle does not leak when held with the needle facing down.
How does adjusting the needle valve on the Bunsen burner affects the flame?
The needle valve or flow valve controls the flow of gas into the Bunsen Burner.
How does adjusting the needle valve on the Bunsen burner affect the flame?
The needle valve or flow valve controls the flow of gas into the Bunsen Burner.
Does the needle float or sink in water?
A needle sink in water.
What is a needle valve?
A needle valve is a type of valve having a small orifice and a threaded, needle-like plunger. It allows precise regulation of flow, although it is generally used for, and is capable of, only relatively small flow rates. A needle valve is a type of valve having a small orifice and a threaded, needle-like plunger. It allows precise regulation of flow, although it is generally used for, and is capable of, only relatively small flow rates.
What makes a needle to float in water?
Water surface tension hold the needle on the water surface.
Why does the needle float when it is dropped in water parallelaly and why it sinks when dropped perpendicularly?
i think that vol of water underneath the needle when it is dropped on water parallely is more which prevents the needle from sinking.
What will happen to a needle if pinch of detergent is added to a water?
If you have floated a needle on the surface of the water in a glass then adding a little detergent will cause the needle to sink. This is because the presence of the detergent changes the surface tension of the water so that it can no longer support the needle.
What is the problem when your car hot water needle does work?
I assume you mean "When your hot water needle does NOT work." Thermostat.
What liquids can a needle float on?
A needle can be made to float on very still water.
A compass needle changes direction if the flow of electricity in the wire near it is reversed?
The answer is true.
Does the compass needle change direction if the flow of electricity in the wire near it is reversed?
true
