Permanent brain damage begins after only 4 minutes without oxygen.
Answer:
Explanation:
The coefficient of performance of the reversible heat pump is:
The thermal efficiency of the reversible power cycle is:
After a quick comparison between both expressions, the following relation is found:
Answer:1-D(intake) 2-B(compression) 3-A(ignition/power) 4-C(exhaust)
Explanation:
A four-stroke cycle engine is an internal combustion engine that utilizes four distinct piston strokes (intake, compression, power, and exhaust) to complete one operating cycle.
The intake event is when the air-fuel mixture is introduced to fill the combustion chamber
The compression stroke is when the trapped air-fuel mixture is compressed inside the cylinder
The power stroke is an engine operation Stroke in which hot expanding gases force the piston head away from the cylinder head.
The exhaust stroke occurs whenspent gases are expelled from the combustion chamber and released to the atmosphere.
Answer:
It is sometimes called the factor label approach because units are treated as a factor (along with a numeric factor) in a quantity like 25 g, allowing us to subject the unit to algebraic operations as if they were variables.
Explanation:
It is sometimes called the factor label approach because we can treat a quantity like 25g as a product of a numerical factor and a unit factor, allowing us to subject the unit to arithmetic operations as if they were variables. Dimensional analysis can be most helpful when helping to set up a problem involving multiplication or division, but it is not limited to multiplication and division: Adding or subtracting quantities, for example, requires they have the same unit, just like adding algebraic terms 5x and 6x, and this rule can be used to help set up or check a calculation.
Answer:
Explanation:The two events that indirectly influenced the American Revolution was the Passage of the English Bill of Rights and the English Declaration of Independence.