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What produces areas of different pressures where air moves from an area of high pressure to an area of low pressure creating wind?
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When the heart contracts it produces a wave of fluid pressure in the?
arteries
What makes heart valves open and close?
Valves in the heart close (or open) due to pressure changes in the 4 chambers of the heart. When blood flows into the heart through the pulmonary vein (oxygenated) the heart is in diastole so both the left atrium and ventricle fill. At this point, the bicuspid valve between the chambers is open. When the left atrium becomes full of blood, stretch receptors trigger a response from the SA node - this leads to a contraction of the left atrium (bicuspid valve forced open by pressure). The pressure then exerted from the left ventricle on the left atrium causes the valve to close. This prevents back-flow into the left atrium. When the left ventricle is full, the AV node sends an impulse down the Bundle of His, and to the Prukinje fibres. The left ventricle is subsequently "squeezed" causing blood to flow up the aorta and out to the body. When the heart is contracting like this it is in Systole. Similarly, valves in the aorta close due to the pressure of the blood (caused by gravity). This, again, prevents back-flow in the heart. A similar chain of events occurs in the right side of the heart.
What coures make green yellow and blue?
Mixing the colours yellow and blue produces green. Mixing green to green makes green, but the resulting green will be different from the two greens that entered the mix (assuming they were not identical).
What is passive hanging?
A method of suicide that has the victim sitting or kneeling and leaning forward. They can EASILY stand up or move and stop the process because they are not "hanging". However, pressure from the "object" on the carotid artery and against the throat produces dizziness and low blood pressure so that they "pass-out" between 10 and 50 seconds and soon die. The method of death was learned by teens who heard of the "Choking Game" and discovered this method could be taken to another level.
Which type pf seismic wave produces the most severe ground movements?
surface waves produces the most severe ground movement because its on the surface of the earth
What is a Piezoelectric gauges?
An instrument used to measure blast pressures resulting from explosions and pressures created in firearms, using a piezoelectric substance that produces a voltage when under pressure.
What produces an ionic bond?
Creating an electrostatic attraction produces an ionic bond.
Will the boiling point of water differ different with noon temperature?
Different places have different elevation, and different elevations have different air pressure. It is the ambient air pressure which affects the boiling point of water. Air presses down on water, making it harder for the water to form bubbles. Less pressure produces a lower boiling point. More pressure produces a higher boiling point.
If a sphygmomanometer were used would it result give the pressure of the heart?
A sphygmomanometer is used to measure blood pressure.
Why are sound waves are described as pressure waves?
Sound waves are described as pressure waves because waves produces pressure by which sound is produces
What kind of pressure does a tornado have?
Tornadoes produces low pressure.
What type of pressure system is a tornado?
A tornado produces low pressure, but it is not a pressure system in and of itself.
What situations would cause air pressure to rise?
Air pressure begins to rise in a situation where there is a change in the temperature, especially when there is cold air hitting the ground. The rise in air pressure produces winds and different types of weather.
Explain the process of the air transferred from low pressure to high pressure in the Air compressor system to produces the energy?
explain the process of the air transferred from low pressure to high pressure in the Air compressor system to produces the energy
What is a pressure belt?
The uneven heating of the earth produces pressure belts. these belts occur at about every 30 degrees latitude. The rotation of the Earth flings the bulk of the air creating an area of low pressure belt in this region.
What is bernoulli's princeiple?
If you mean Bernoulli's principle, it's the statement that an increase in the speed of a fluid produces a decrease in pressure and a decrease in the speed produces an increase in pressure.
Creating nuclear energy produces large amounts of radioactive waste.?
True
