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To compensate for the decreased air density the rotor blades need a greater angle of attack, pushing the retreating blade closer to stall(reducing the maximum airspeed)
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Why helicopter speed reduce as increase altitude?
Because as you increase altitude, the density of air decreases. To compensate for the decreased air density the rotor blades need a greater angle of attack, pushing the retreating blade closer to stall(reducing the maximum airspeed)
How does temperature affect the physical properties of petrol?
An increase in temperature will reduce the density, reduce the viscosity, reduce thermal conductivity, and increase the specific heat capacity. A decrease in temperature will have the opposite affect.
When flying a helicopter when would you reduce collective adjust the pedals and adjust the throttle?
Reduce collective will reduce the lift and the helicopter will begin to descend. Reducing the throttle will also reduce the RPM and result in descent of the helicopter. With less torque, the helicopter will begin to spin so the rudder pedals will have to be adjusted to reduce the amount of tail rotor thrust.
What can be done to raise the boiling point of water?
All you have to do to reduce the boiling point of water is go to a higher altitude and boil it.
How do you reduce density of oils?
Temparature effect on density
How do you change the mass or volume of a gas in order to decrease the density?
- modifying the temperature- modifying the pressure- modifying the volume
Did taxes increase or reduce?
Reduce
What causes the buoyancy to increase or decrease?
Buoyancy force come from difference in density of the object and the surrounding. Buoyancy of the ship can change from the pay load inside its' space. More load per space reduce the buoyancy. For Balloon, buoyancy is change by increase temperature of gas inside to balloon since increase in temperature would cause gas to expand and had lesser density in its' cavity. In general, buoyancy increase or decrease by changing of density of the object or the surrounding medium.
How can you change the overall density of an object?
In a simple way, since density = mass /volume, the density of an object can be changed by changing either mass or volume of an object .
How can you reduce and increase friction?
Lubrication to reduce friction. To increase friction step on the brakes.
Increase is to reveal as decrease is to?
Reduce
What happens to the density of a mineral if it's broken into two pieces?
density units are kg per cubic meter. if you reduce the weight, and reduce the size they cancel out, and the density is the same.
