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Page "Supernova remnant" ¶ 12
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When and supernova
When, in a supernova, a star collapses to a neutron star, its magnetic field increases dramatically in strength.
When core collapse occurs in a sufficiently massive star, the explosion energy is insufficient to expel the outer layers of the star and it will collapse into a black hole without producing a visible supernova outburst.
When material expelled in an initial normal supernova explosion meets dense nebular or material or dust close to the star, the shockwave converts kinetic energy efficiently into visible radiation.
When a white dwarf reaches this limit it will collapse under its own weight and cause a Type 1a supernova.
When trying to calibrate the Hubble diagram with accurate supernova standard candles, observational evidence for dark energy was obtained in the late 1990s.
When the iron core of a super massive star becomes heavier than electron degeneracy pressure can support, the core of the star collapses, and the iron core is compressed by gravity until nuclear densities are reached when a strong rebound sends a shock wave throughout the rest of the star and tears it apart in a large supernova explosion.
When he appears, it is as a figure so immense as to make a supernova a mere gleam in his eyes and he takes a whole page to say YES.
When stars die, supernova explosions, similarly, drive blast waves that can reach even larger sizes, with expansion velocities up to several hundred km s < sup >− 1 </ sup >.
When astronomers discovered SN 1994I in the Whirlpool Galaxy a few days later, they realized that the observations made with the telescope at Leuschner had captured the earliest images of the supernova.

When and remnant
When the sea otter finally received federal protection in 1911, Washington's sea otter had been hunted to extinction, and although a small remnant population still existed in British Columbia, it soon died out.
When discovered, about 1503, the island's habitat was dominated by the remnant, old-growth forest of Bermuda Juniper ( Juniperus bermudiana ).
When the towns of Carmel and Patterson were split from Frederickstown in 1795, the remnant, constituting the current Kent, was established as the " Town of Frederick ".
When the prophets had finished their frenzy, Ossebaar and a small remnant came back to their senses.
When the Doctor, Sam and Fitz travel to San Francisco in the year 2002, they find a dimensional scar, a remnant of the events in the 1996 Doctor Who television movie.

When and slows
When combined with subsequent painting ( which slows zinc consumption ), electroplating is durable enough to be used in some premium auto body coatings.
When a positron slows down to speeds similar to those of electrons in the material, the positron will annihilate an electron, releasing two gamma photons in the process.
When the wave enters shallow water, it slows down and its amplitude ( height ) increases.
When the density and temperature are high enough, deuterium fusion begins, and the outward pressure of the resultant radiation slows ( but does not stop ) the collapse.
When the animal starts diving, its heart rate slows to about one-tenth of its normal rate.
When the brake pedal of a modern vehicle with hydraulic brakes is pushed, ultimately a piston pushes the brake pad against the brake disc which slows the wheel down.
When a wave enters shallow water it Wave shoaling | shoals, that is, it slows down and the wave height increases.
When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, this results in some congestion.
When this occurs, an oblique shock wave is generated at the point where the flow slows down back to subsonic speed.
When the balloon has expanded beyond its elastic limit and bursts ( about in diameter ), a small parachute slows the descent of the radiosonde, minimizing the danger to lives and property.
When this occurs, the water slows in a rather abrupt rise ( a step or standing wave ) on the liquid surface.
When heart rate slows, blood pressure drops, and the resulting lack of blood to the brain causes fainting.
When any column member slows down, all those behind it will automatically slow also.
When a compression release engine brake is active, a valve releases the pressure from the cylinder before the piston starts back down, so the slowing effect is present on the up stroke, but no accelerating effect is present on the down stroke and the net effect is the vehicle slows down.
When the boom brake is actuated, friction on the line either works as a preventer ( stops the boom from moving in the direction that would slacken the main sheet ), or slows the boom ’ s speed while jibing.
When growth slows, stars become cash cows if they have been able to maintain their category leadership, or they move from brief stardom to dogdom.
When a pulsar's spin period slows down sufficiently, the radio pulsar mechanism is believed to turn off ( the so-called " death line ").
When you ’ re not selling as many new boats and not taking as many deposits, cash flow slows.
When reorganization results in an arrangement that reduces or eliminates the error that is driving it, the process of reorganization slows or stops with the new organization in place.
When fluid flow slows down its kinetic energy is converted to heat ; in high speed flows, tremendous energy is represented by the mean motion of the flow.
When the two tones gradually approach unison, the beating slows down and disappears.
When bands of precipitation near frontal zones approach steep topography, a low-level barrier jet stream forms parallel to and just prior to the mountain ridge, which slows down the frontal rainband just prior to the mountain barrier.

When and speed
When the two cars were equidistant from him, the station wagon started up again and the Ford gathered speed.
When speed is being measured, the instruction set matters.
When a projectile is thrown by hand, the speed of the projectile is determined by the kinetic energy imparted by the thrower's muscles performing work.
When problems with poor control at high speed were first encountered, they were addressed by designing a new style of control surface with more power.
When Robinson first designed his anemometer, he asserted that the cups moved one-third of the speed of the wind, unaffected by the cup size or arm length.
When the particles are in great motion, they produce a Doppler shift for measuring wind speed in the laser light, which is used to calculate the speed of the particles, and therefore the air around the anemometer.
When a program demands more computational resources, the CPU quickly ( there is some latency ) returns to an intermediate or maximum speed with appropriate voltage to meet the demand.
When the temperature is low, the spring winds and closes the valve, which allows the fan to spin at about 20 % to 30 % of the shaft speed.
When a device is designed to perform without the need of human inputs for correction it is called automatic control ( such as cruise control for regulating a car's speed ).
When these vessels of a new model were built, which were intended to " clip " over the waves rather than plough through them, the improved type of craft became known as " clippers " because of their speed.
When The Music Stops is an example of an events franchise in the UK, in this case, running speed dating and singles events.
When used as a lifting element on a " hydrofoil " boat, this upward force lifts the body of the vessel, decreasing drag and increasing speed.
When a body at these points is perturbed, it moves away from the point, but the factor opposite of that which is increased or decreased by the perturbation ( either gravity or angular momentum-induced speed ) will also increase or decrease, bending the object's path into a stable, kidney-bean-shaped orbit around the point ( as seen in the rotating frame of reference ).
When viewed from directly in front, the speed may show exactly 60 ; but when viewed from the passenger seat the needle may appear to show a slightly different speed, due to the angle of viewing.
When speed is important, Python programmers tend to try using a JIT compiler such as Psyco or using an alternative language implementation such as PyPy.
When the speed of the runner is equal to the initial jet velocity, the torque is zero ( i. e. when u = V < sub > i </ sub >, then T = 0 ).
When using a pulsed radar, the variation between the phase of successive returns gives the distance the target has moved between pulses, and thus its speed can be calculated.
When serializing structures with, there are network safe functions that always store their data in a format that is readable on any computer at a small cost of speed.
When a direction is assigned to rotational speed, it is known as rotational velocity or angular velocity.
When proper units are used for tangential speed v, rotational speed ω, and radial distance r, the direct proportion of v to both r and ω becomes the exact equation:
When the transmission detects a speed difference of greater than 20 % between the front and rear axle sets, the transmission progressively sends power to the rear wheels.
When ω is the angular velocity of the turbine, then the blade speed is.

0.554 seconds.