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Why the water in a drinking straw does not drip out when you press the top of the straw with your thumb?
When you press the top of the straw with your thumb, you create a seal which prevents air from entering the straw. The pressure inside the straw increases, causing the water to remain inside the straw due to the force of gravity and the seal created by your thumb.
Why does the drinking straw does not drip out when you press the top of the straw with your thumb or finger tip?
Your finger prevents air from entering through the top of the straw. As fluid moves down the straw it leaves a void in it's wake, one that is usually immediately filled by air. By preventing the air from entering the top of the straw, the fluid cannot move downwards because to do so would leave a vacuum space between your finger and the fluid; this "sucks" the fluid back in into place and prevents it from decending down the straw.
Why does a straw hold water if you put your thumb over top of it?
When a thumb is placed over the hole in the top of the straw, it seals the entry way for air. When the straw is pulled out of the water, it is to be noted that a drop or two of water falls out of the bottom but no more falls. This is because when the water droplets fall, this creates more space in the air pocket in the top part of the straw. WIth more space the pressure decrease in the air pocket. In addition, gravity is working on the water inside the straw, but these two forces do not outweigh the force of atmospheric pressure outside, as a result, the water stays within the staw.
How is your thumb a lever?
A lever is simply a solid structure on which forces act. The human thumb is therefore made up of a number of classic levers. The joints make up the fulcrums, the tendons attachment points apply the effort, and the force is applied at the end of the thumb.
What is the three finger rule in physics and how is it used to determine the direction of a magnetic field?
The three finger rule in physics is a method used to determine the direction of a magnetic field around a current-carrying wire. To use this rule, point your thumb in the direction of the current flow, and your fingers will curl in the direction of the magnetic field.
The water in a drinking straw does not drip out when you press the top of the straw with your thumb or finger tip?
there is no air
Why the water in a drinking straw does not drip out when you press the top of the straw with your thumb of finger tip?
Because under your thumb, inside the straw, there is now a vacuum which keeps the water in.
Why the water in a drinking straw does not drip out when you press the top of the straw with your thumb?
When you press the top of the straw with your thumb, you create a seal which prevents air from entering the straw. The pressure inside the straw increases, causing the water to remain inside the straw due to the force of gravity and the seal created by your thumb.
Why does the drinking straw does not drip out when you press the top of the straw with your thumb or finger tip?
Your finger prevents air from entering through the top of the straw. As fluid moves down the straw it leaves a void in it's wake, one that is usually immediately filled by air. By preventing the air from entering the top of the straw, the fluid cannot move downwards because to do so would leave a vacuum space between your finger and the fluid; this "sucks" the fluid back in into place and prevents it from decending down the straw.
What is the fingerings for D natural on the flute?
Lowest - Left hand - thumb(1st finger), 2nd finger, 3rd finger and 4th finger Right Hand - 2nd finger, 3rd finger and 4th finger (no pinky) Middle - LH - thumb, 3rd finger, 4th finger RH - 2nd finger, 3rd finger and 4th finger (no pinky) Top - LH - thumb, 3rd finger and 4th finger RH - none
Why is thumb finger called thumb?
The thumb is called a thumb instead of a finger because it is smaller than a finger. A thumb also has 2 joints and a finger has 3.
Which finger is your forefinger?
Your forefinger is your pointer or index finger. It is the finger next to your thumb.
The water in a drinking straw does not drip out when you press te top of the straw with your thumb or finger tip?
It's a matter of air pressure that acts on the water. When the straw is uncovered, there are two forces acting on the water inside. There is gravity, pulling the water down, and air pressure. The pressure is about the same on both ends of the straw, but on the top of the straw, the pressure pushes the water downward, and on the bottom of the straw, the pressure pushes upward. Both of the pressures are the same, so the net force is just the force of gravity pulling the water down and out of the straw. When you cover the top of the straw, you block the air from pushing down on the water. In this case, the only forces on the water are the air pressure pushing up, and gravity pulling down. However, the air pressure is a greater force than gravity, and keeps the water in the straw despite gravity's pull.
Is the thumb medial to the ring finger?
No. When the body is in the anatomical position, the thumb is further away from the midline. You say that the thumb is lateral to the ring finger.
What does span mean in bowling?
It is the measurement between the thumb and middle finger, thumb and ring finger and middle finger to ring finger.
Which is index finger?
Finger next to the thumb, i.e. To the immediate right of the thumb on your right hand To the immediate left of the thumb on your left hand
What is the longest finger on your hands?
Everyone thinks that your middle finger is the longest finger on your hand, but according to doctors, the thumb (which is counted as a finger) is the longest. Your thumb does not end at the crease, it ends at the bone close to your wrist. your thumb is the longest finger on your hand!
