When the muscles of the vocal folds contract, the airflow from the lungs is impeded until the vocal folds are forced apart again by the increasing air pressure from the lungs.

When sailing downwind, the sails no longer generate aerodynamic lift and airflow is stalled, with the wind push on the sails giving drag only.

When this occurs the wing deflects the airflow downwards, " turning " the air as it passes the wing.

When the throttle is rapidly opened, airflow through the carburetor increases immediately, faster than the fuel flow rate can increase.

When determining CADR, the amount of airflow in a space is taken into account.

When the aileron is deflected up ( to make its wing go down ), the leading edge of the aileron dips into the airflow beneath the wing.

When an air valve is closed, there is no airflow.

When the closed valve is opened, airflow will result from the cavity behind the initial closure outward until intraoral pressure is equal to atmospheric pressure.

When a swept wing travels at high speed, the airflow has little time to react and simply flows over the wing almost straight from front to back.

When an aircraft is steered on the ground exclusively using the rudder, turning the plane requires that a substantial airflow be moving past the rudder, which can be generated either by the forward motion of the aircraft or by thrust provided by the engines.

When it deviates into one of the cavities, it narrows that cavity and impedes airflow.

: When a propeller is mounted in front of the tail changes in engine power alter the airflow over the tail and can give strong pitch or yaw changes.

When the main bases in Afghanistan and Uzbekistan were constructed, Incirlik ’ s airflow supporting OEF decreased to a baseline sustainment level.

When the throttle is opened all the way, the engine's air induction system is exposed to full atmospheric pressure, and maximum airflow through the engine is achieved.

When a person prepares to speak, the vocal folds come together over the trachea and vibrate due to the airflow from the lungs.

When gliding, however, the angle of attack is lowered and the airflow meets the parafoil head on.

When a car is run at part throttle, this interruption in the airflow causes excess vacuum, which causes the engine to use up valuable energy acting as a vacuum pump.

When lamb and mutton are irradiated at substerilization doses, the meat becomes dehydrated, the fat becomes chalky, and, again, unnatural changes in color occur.

When an APAF-1 gene trap is introduced into cells, many morphological changes occur, such as spina bifida, the persistence of interdigital webs, and open brain.

When this happens the distribution of lift changes dramatically, typically causing a powerful nose-down trim.

When the Church chooses to canonize new material, it is typically added to the Doctrine and Covenants ; the most recent changes were made in 1981.

When considering changes to halakha, Conservative Judaism's rabbinical authorities may rely on historical analysis as well as religious considerations.

When in estrus, the female's scent changes subtly and nearby males begin pursuit.

When the Industrial Revolution arrived, many changes occurred that brought about the food today in its modern form.

When crises arise, Clark quickly changes into Superman.

When W. Grant McMurray became Prophet – President, he declared that instruction specific to leadership changes would no longer be included, so that the focus of the work could be more doctrinal in nature, and less administrative.

When EM radiation interacts with matter, its behavior changes qualitatively as its frequency changes.

When the current changes, the magnetic field does too, inducing a voltage between the ends of the conductor.

When a user changes to pure darknet operation, Freenet becomes very difficult to detect from the outside.

When these revolutionary changes to the Church were implemented, it spawned a counter-revolutionary movement, particularly amongst women.

When an object changes, it always changes in some particular way.

When the current flowing through an inductor changes, creating a time-varying magnetic field inside the coil, a voltage is induced, according to Faraday's law of electromagnetic induction, which by Lenz's law opposes the change in current that created it.

When the blade of an ice skate passes over the ice, the ice undergoes two kinds of changes in its physical state and a change in temperature due to kinetic friction and the heat of melting.

When an object changes its color smoothly, the animation can be defined by keyframes — the first showing its original color, and the second showing its final color.

When cut, it possesses a silvery-white color that quickly changes to gray due to oxidation.

When a beam of light crosses the boundary between a vacuum and another medium, or between two different media, the wavelength of the light changes, but the frequency remains constant.

When Hera, the most conservative of goddesses — for she had the most to lose in changes to the order of nature — discovered that Leto was pregnant and that Zeus was the father, she realized that the offspring would cement the new order.

When a substance undergoes a phase transition ( changes from one state of matter to another ) it usually either takes up or releases energy.

When making changes to the source code that programs are made up of, programmers need to make other programmers aware of the task that the routine is to perform.

When a beam of silver atoms was passed through a specially shaped magnetic field, the beam was split based on the direction of an atom's angular momentum, or spin.

When the current through the device is reversed, the electrodes switch functions, so anode becomes cathode, while cathode becomes anode, as long as the reversed current is applied, with the exception of diodes where electrode naming is always based on the forward current direction.

When a player is genuinely deceived, he will often lose the point immediately because he cannot change his direction quickly enough to reach the shuttlecock.

When LTR text is mixed with RTL in the same paragraph, each type of text is written in its own direction, which is known as bi-directional text.

When covalent bonds link long chains of atoms in large molecules, however ( as in polymers such as nylon ), or when covalent bonds extend in networks though solids that are not composed of discrete molecules ( such as diamond or quartz or the silicate minerals in many types of rock ) then the structures that result may be both strong and tough, at least in the direction oriented correctly with networks of covalent bonds.

When a metal wire is subjected to electric force applied on its opposite ends, these free electrons rush in the direction of the force, thus forming what we call an electric current.

When analyzing electrical circuits, the actual direction of current through a specific circuit element is usually unknown.

When the radiometer is heated in the absence of a light source, it turns in the forward direction ( i. e. black sides trailing ).

When the trajectory r ( t ) rotates an amount dθ, u < sub > ρ </ sub >, which points in the same direction as r ( t ), also rotates by dθ.

When drawing hair, the lines of the sketch follow the direction of the hair growth.

When Maderno died in 1629, he and Pietro da Cortona continued to work on the palace under the direction of Bernini.

When these tiny magnetic dipoles are aligned in the same direction, their individual magnetic fields add together to create a measurable macroscopic field.

When the substituent groups are oriented in the same direction, the diastereomer is referred to as cis, whereas, when the substituents are oriented in opposing directions, the diastereomer is referred to as trans.

When a magnetic field is present that is not parallel to the direction of motion of moving charges, these charges experience a force, called the Lorentz force.

When a current-carrying semiconductor is kept in a magnetic field, the charge carriers of the semiconductor experience a force in a direction perpendicular to both the magnetic field and the current.

Ribbentrop quickly learned that Hitler always favoured the most radical solution to any problem, and accordingly tended his advice in that direction as a Ribbentrop aide recalled: When Hitler said ' Grey ', Ribbentrop said ' Black, black, black '.

When an external electric field is applied to the liquid crystal, the dipole molecules tend to orient themselves along the direction of the field.

When the chordline is horizontal, the trailing edge has a downward direction and since the air follows the trailing edge it is deflected downward.

When a mineral is broken in a direction that does not correspond to a plane of cleavage, it is termed to have been fractured.

When a person is inside the powerful magnetic field of the scanner, the average magnetic moment of many protons becomes aligned with the direction of the field.

When an external magnetic field is applied, these magnetic moments will tend to align themselves in the same direction as the applied field, thus reinforcing it.

When data is fetched from memory and placed into the MDR, it is written to in one direction.

When a magnetic field is applied, the dipoles will tend to align with the applied field, resulting in a net magnetic moment in the direction of the applied field.

When this happens due to the presence of the electromagnetic field from a photon, a photon is released in the same phase and direction as the " stimulating " photon, and is called stimulated emission.