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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 are advantages and disadvantages of a needle valve?
Advantages of a needle valve include precise flow control and the ability to handle high pressures. However, disadvantages can include susceptibility to clogging from debris and limited flow capacity compared to other types of valves.
How do you get a needle to point north and south in a glass of water?
Place a magnet near the glass of water so that the needle aligns itself with the magnetic field of the Earth. The needle will then point north and south due to the influence of the magnet.
What is a natural flow of water from underground?
A natural flow of water from underground is called a spring. Springs occur where an aquifer is filled to the point that the water overflows onto the land surface. This flow of water can create streams or rivers.
How does the water in the cells behave when in high or low concentrations of water?
In high solute concentrations water will flow out of the cell. In low solute concentrations water will flow into the cell.
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.
Why when you put the needle in the water it will going down?
When a needle is placed on the surface of water, the surface tension of the water causes it to be attracted to the needle, creating a depression in the water surface underneath the needle. This results in a downward force acting on the needle, causing it to sink into the water.
Does the needle float or sink in water?
A needle will sink in water because it is denser than water. The buoyancy force acting on the needle is not enough to counteract its weight, causing it to sink.
what size needle will blood flow the fastest?
Blood will flow the fastest through a larger gauge needle, as a smaller diameter (higher gauge number) restricts the flow. Typically, a 16-gauge needle, which is larger in diameter, allows for a greater volume of blood to flow compared to smaller gauges like 18 or 20. Therefore, when rapid blood transfer is needed, a 16-gauge needle is often preferred.
Does the compass needle change direction if the flow of electricity in the wire near it is reversed?
Yes, the compass needle will change direction if the flow of electricity in the wire near it is reversed. This is because the flow of electricity creates a magnetic field around the wire, which can interact with the magnetic field of the compass needle.
What makes a needle to float in water?
A needle can float on water due to surface tension. When the needle is carefully placed on the surface of the water, its weight is not enough to break the surface tension created by the water molecules, causing it to float.
What needle is used for chemotherapy?
A small, thin needle called a butterfly needle or a catheter needle is commonly used for chemotherapy. These needles are designed to be gentle on veins and can accommodate the flow of chemotherapy drugs.
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 a needle valve work?
A needle valve regulates fluid flow by using a tapered, needle-like plunger that fits into a conical seat. When the valve is turned, the needle moves up or down, adjusting the orifice size and controlling the flow rate. This design allows for precise control over the flow, making needle valves ideal for applications requiring fine adjustments. They are commonly used in hydraulics, gas lines, and laboratory settings.
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.
Why would a needle flaot on the water?
A needle can float on water due to surface tension. The surface tension of water is strong enough to support the needle and prevent it from sinking, as long as the needle is carefully placed on the water and doesn't break the surface tension.
Why needle with grease float on water surface?
The needle with grease floats on water because the grease creates a waterproof barrier around the needle. When placed on water, the surface tension of the water is able to support the needle and grease due to the decreased contact between the needle and water. This phenomenon is known as the "floating needle trick."
