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The control that stops the condensing unit if the head pressure climbs too high is classifies as a?
Wiki User
∙ 11y ago
safety control
Wiki User
∙ 11y ago
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How does altitude affect a Surface to Air missile range?
Gravity is pulling the projectile down steadily; the further it climbs, the more resistance it's recieving, it begins to slow down, as with any projectile.
Why Strength and hardness of material are increased in cold working?
The reason that the hardness increases as the cold working increases is because of defects. Before the reduction, or cold working, the lattice of the material has a virtually defect free, or dislocation free, pattern. The cold working increases the amount of dislocations, and because of this, the material becomes more resistant to additional deformations. This manifests itself, most noticeably, as resistance to plastic deformations. Microscopically, this explained by the two types of dislocation shifts. Dislocation boundaries can move within the plane of dislocation relatively easily; this is known as a glide. However, when a dislocation boundary is moved up or down, out of the plane of dislocation, it takes much more energy. When a material becomes saturated with dislocations, any new dislocation will inevitably have to shift some dislocation boundaries out of their plane. This is known as a climb. Since climbs require more energy, more force is needed to plastically deform the material, i.e. the material becomes harder. The more dislocations a material has, the more climbs are done to achieve this new dislocation, making it harder to plastically deform a material. So the more cold worked the material is, the more climbs are needed, meaning that more energy is needed to deform the material. I'm pretty sure this is right -SMG
What is an air blast circuit breaker and how its operate?
The circuit breaker is an absolutely essential device in the modern world, and one of the most important safety mechanisms in your home. Whenever electrical wiring in a building has too much current flowing through it, these simple machines cut the power until somebody can fix the problem. Without circuit breakers (or the alternative, fuses), household electricity would be impractical because of the potential for fires and other mayhem resulting from simple wiring problems and equipment failures.In this article, we'll find out how circuit breakers and fuses monitor electrical current and how they cut off the power when current levels get too high. As we'll see, the circuit breaker is an incredibly simple solution to a potentially deadly problem.To understand circuit breakers, it helps to know how household electricity works.Electricity is defined by three major attributes:VoltageCurrentResistanceVoltage is the "pressure" that makes an electric charge move. Current is the charge's "flow" -- the rate at which the charge moves through the conductor, measured at any particular point. The conductor offers a certain amount of resistanceto this flow, which varies depending on the conductor's composition and size.­Voltage, current and resistance are all interrelated -- you can't change one without changing another. Current is equal to voltage divided by resistance (commonly written as I = v / r). This makes intuitive sense: If you increase the pressure working on electric charge or decrease the resistance, more charge will flow. If you decrease pressure or increase resistance, less charge will flow. To learn more, check out How Electricity Works. Circuit Breaker: At Work in Your HomeThe power distribution grid delivers electricity from a power plant to your house. Inside your house, the electric charge moves in a large circuit, which is composed of many smaller circuits. One end of the circuit, the hot wire, leads to the power plant. The other end, called the neutral wire, leads to ground. Because the hot wire connects to a high energy source, and the neutral wire connects to an electrically neutral source (the earth), there is a voltage across the circuit -- charge moves whenever the circuit is closed. The current is said to be alternating current, because it rapidly changes direction. (See How Power Distribution Grids Work for more information.)The power distribution grid delivers electricity at a consistent voltage (120 and 240 volts in the United States), but resistance (and therefore current) varies in a house. All of the different light bulbs and electrical appliances offer a certain amount of resistance, also described as the load. This resistance is what makes the appliance work. A light bulb, for example, has a filament inside that is very resistant to flowing charge. The charge has to work hard to move along, which heats up the filament, causing it to glow.In building wiring, the hot wire and the neutral wire never touch directly. The charge running through the circuit always passes through an appliance, which acts as a resistor. In this way, the electrical resistance in appliances limits how much charge can flow through a circuit (with a constant voltage and a constant resistance, the current must also be constant). Appliances are designed to keep current at a relatively low level for safety purposes. Too much charge flowing through a circuit at a particular time would heat the appliance's wires and the building's wiring to unsafe levels, possibly causing a fire.This keeps the electrical system running smoothly most of the time. But occasionally, something will connect the hot wire directly to the neutral wire or something else leading to ground. For example, a fan motor might overheat and melt, fusing the hot and neutral wires together. Or someone might drive a nail into the wall, accidentally puncturing one of the power lines. When the hot wire is connected directly to ground, there is minimal resistance in the circuit, so the voltage pushes a huge amount of charge through the wire. If this continues, the wires can overheat and start a fire.The circuit breaker's job is to cut off the circuit whenever the current jumps above a safe level. In the following sections, we'll find out how it does this.Breaker Design: BasicThe simplest circuit protection device is the fuse. A fuse is just a thin wire, enclosed in a casing, that plugs into the circuit. When a circuit is closed, all charge flows through the fuse wire -- the fuse experiences the same current as any other point along the circuit. The fuse is designed to disintegrate when it heats up above a certain level -- if the current climbs too high, it burns up the wire. Destroying the fuse opens the circuit before the excess current can damage the building wiring.The problem with fuses is they only work once. Every time you blow a fuse, you have to replace it with a new one. A circuit breaker does the same thing as a fuse -- it opens a circuit as soon as current climbs to unsafe levels -- but you can use it over and over again.The basic circuit breaker consists of a simple switch, connected to either a bimetallic strip or an electromagnet. The diagram below shows a typical electromagnet design.The hot wire in the circuit connects to the two ends of the switch. When the switch is flipped to the on position, electricity can flow from the bottom terminal, through the electromagnet, up to the moving contact, across to the stationary contact and out to the upper terminal.The electricity magnetizes the electromagnet (See How Electromagnets Work to find out why). Increasing current boosts the electromagnet's magnetic force, and decreasing current lowers the magnetism. When the current jumps to unsafe levels, the electromagnet is strong enough to pull down a metal lever connected to the switch linkage. The entire linkage shifts, tilting the moving contact away from the stationary contact to break the circuit. The electricity shuts off.Click on the circuit breaker to release the switch.A bimetallic strip design works on the same principle, except that instead of energizing an electromagnet, the high current bends a thin strip to move the linkage. Some circuit breakers use an explosive charge to throw the switch. When current rises above a certain level, it ignites explosive material, which drives a piston to open the switch.
Why do your ears pop when your airplane takes off?
As the plane climbs, the pressure drops, even in a pressure cabin. The pop is your ears equalizing from ground pressure to altitude pressure.
What is it called when air pressure on earth decreases?
As a person climbs to a higher point on earth, the air pressure decreases because there is less air above you. ... The phenomenon is called "hydrostatic equilibrium".
What bear climbs the best?
the sun bear climbs the best
When was Emily Climbs created?
Emily Climbs was created in 1925.
What are snowmobile hill climbs?
it is when a snowmobile climbs up a hill.
What do you call a person that climbs?
A mountaineer is someone who climbs mountains for sport. Also, an alpinist is someone who climbs the Alps or other high mountains.
How is air pressure relative to sea level?
Air pressure is higher at sea-level, so a kettle will boil quickly. Air pressure lessens the higher one climbs, so a kettle will take a long time to boil on the top of Mount Everest.
Why does pressure change change with elevation and depth?
Pressure drops at higher elevations because of the decrease in the weight of air. Under the water, pressure climbs with increasing depth because of the combined weight of the water and that of the atmosphere.
What is the creature that climbs the tree with two legs and climbs down with three..?
Nothing
Does the fluid pressure increase or decrease as a person climbs a mountain?
It increases because the higher you go the lower the pressure is in the air and your blood (body fluids) pressure has to go higher to survive. But you can't go super high like to space because you would die.
When a boy climbs steps what happened to his potential energy?
If he climbs up the stairs, his potential energy will increase.
What always climbs higher the next time?
A true climber always climbs higher the next time.
