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What is the building material that blocks heat transfer between the air inside and the air outside?
insulation
How does air resistance affect the acceleration of falling objects?
As a falling object accelerates through air, its speed increases and air resistance increases. While gravity pulls the object down, we find that air resistance is trying to limit the object's speed. Air resistance reduces the acceleration of a falling object. It would accelerate faster if it was falling in a vacuum.
How is friction and air resistance different?
yes it is a big diff in both of them air resistanceis in water butfrictionis every where
Does air resistance increase or decrease the acceleration of a falling leaf from a tree?
Air resistance decreases acceleration of falling objects
Does air temperature affect air resistance?
There are two factors that influence air resistance with temperature. Air density decreases with temperature so that the force needed to push the air out of the way is decreased, thereby decreasing resistance. Conversely, air viscosity increases with temperature (unlike oil for example where viscosity decreases with temperature) so that the drag increases. Under normal conditions, the density change of air has the greatest effect and air resistance decreases at higher temperatures.
Formula to calculate min insulation resistance?
insulation resistance = (2 * operating voltage +1000V) at operating temperature if you define what you mean by minimum insulation resistance maybe i could help 132,000V on the towers is usually happy with 6' of air some insulation is far better than air dry air 500v/mill thermoplastics 6000v/mill your power drill has 1/8" - 1/4" of plastic on the cord and perhaps .001" on the wire in the coils the cord gets rougher handling anything practical insulation resistance (2 * operating voltage +1000V) witch means a 1500Vdc megger is ok for 120V appliances should be safe to handle if its more than 10megohms the 1500V will bridge any pinholes or airgaps NEVER use a vom the 9v battery wont find a pinhole or an air gap ceramic on heaters and toasters has a way of letting metals diffuse in it lowering the resistance over time also it usually lowers with temperature so the resistance reading will be a lot lower while its hot
What is air resistance and what are the two factors that air resistance depends on?
Air Resistance is a force.
How do you measure insulation resistance between windings for 120KVA alternator?
Use a megger or a insulation tester. Place one lead on any of the phases nd other lead the alternator boy. Observe the indicator. In megger it s good with infinity or it must be minimum 100M OHM, IF IT SHOWs 50 it could be coz of moisture in winding by heating the alternator the insulation resistance value may improve
What force slows objects moving through the air?
Air resistance
How do you resist air resistance?
You don't "resist" it but you "reduce" it. For example, many vehicles and projectiles are made in a streamline design to reduce air resistance.
How molecules in the air cause air resistance?
How molecules in the air cause air resistance?
How does home insulation?
It keeps cold air out in the winter and warmth in. And keeps hot summer air out and cool air in. The insulation traps pockets of air which slows down the transfer of heat from one area to another. The material which makes up the insulation also slows down the transfer of heat. This slowing down is called resistance, hence the measurement on insulation, R-values. Some insulation do act as an air barrier (and some can even act as a moisture barrier); however this is not always the case. In modern building methods, we use an additional air and/or moisture barrier to help maintain the comfort in the home. You do not want to stop air flow in all situations, and you really do not want a moisture barrier in areas along the Gulf Coast- this can harm the structure of the home.
How does home insulation work?
It keeps cold air out in the winter and warmth in. And keeps hot summer air out and cool air in. The insulation traps pockets of air which slows down the transfer of heat from one area to another. The material which makes up the insulation also slows down the transfer of heat. This slowing down is called resistance, hence the measurement on insulation, R-values. Some insulation do act as an air barrier (and some can even act as a moisture barrier); however this is not always the case. In modern building methods, we use an additional air and/or moisture barrier to help maintain the comfort in the home. You do not want to stop air flow in all situations, and you really do not want a moisture barrier in areas along the Gulf Coast- this can harm the structure of the home.
What type of heat transfer does adding insulation slow down?
Generally speaking, insulation slows the movement of thermal energy by convection. The dead air spaces in fiberglass insulation make it a good bet to put in walls and under roof spaces. Styrofoam coolers work because the many, many tiny air spaces in the styrofoam are places where air is trapped, and those are dead air spaces.
Does dead air space provide insulation?
As you should know, the purpose of insulation is to create dead air space. DEAD air does not transfer temperatures.
Why is there loft insulation?
There is loft insulation to keep in all the warm air from the heater
Why does the oscillation of a pendulum gradually slows down after a certain interval of time?
Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.
