What is a secant that contains the diameter?

What is a secant that contains the diameter?

A chord is a segment that joins two points on a circle. A diameter is a chord that passes through the center. A secant is a line that contains a chord. In the figure, segment EF is a chord; segment CD is a diameter; segment AD is a radius, with point A the center; line EF is a secant.

What is secant in circle?

In geometry, a secant of a curve is a line that intersects the curve at a minimum of two distinct points. In the case of a circle, a secant will intersect the circle at exactly two points.

What is the purpose of airfoil in aircraft?

Airfoil, also spelled Aerofoil, shaped surface, such as an airplane wing, tail, or propeller blade, that produces lift and drag when moved through the air. An airfoil produces a lifting force that acts at right angles to the airstream and a dragging force that acts in the same direction as the airstream.

How does an aerofoil work?

EXPLANATION OF HOW IT WORKS/ IS USED: The wings provide lift by creating a situation where the pressure above the wing is lower than the pressure below the wing. Since the pressure below the wing is higher than the pressure above the wing, there is a net force upwards.

What is Bernoulli’s principle of flight?

In fluid dynamics, Bernoulli’s principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in pressure or a decrease in the fluid’s potential energy. When the air speeds up, the pressure also decreases. Past the constriction, the airflow slows and the pressure increases.

What is a human with wings called?

Angel – Humanoid creatures who are generally depicted with bird-like wings. In Abrahamic mythology and Zoroastrianism mythology, angels are often depicted as benevolent celestial beings who act as messengers between God and humans.

Can humans adapt to fly?

In principle, yes, humans could evolve into fliers. Easiest way to evolve a flier would be to start with a glider, and the easiest way to evolve a glider is to start with an arboreal (tree-dwelling) critter. So there would have to be some reason a population of humans left the ground and went back to the trees.

Will humans evolve to live longer?

An article published in Gerontology in 2017 has shown that even though the mortality of centenarians has stayed the same over recent decades, suggesting human longevity stops increasing at a certain age. However, there is no convincing evidence that we have reached the limit of human life span.