When used as a unit of power, Btu per hour ( Btu / h ) is the correct unit, though this is often abbreviated to just " Btu ".

When appearing as the suffix "- burg ( h )" in place-names, it is pronounced.

When Greek orthography was codified by grammarians in the Hellenistic era, they used a diacritic symbol derived from this half-H shape to signal the presence of / h /, and added as its counterpart a reverse-shaped diacritic to denote absence of / h /.

When Fat ' h Ali became the Shah of Persia in 1797, he was given a set of the Britannica's 3rd edition, which he read completely ; after this feat, he extended his royal title to include " Most Formidable Lord and Master of the Encyclopædia Britannica ".

When a distance in kilometers ( km ) is divided by a time in hours ( h ), the result is in kilometers per hour ( km / h ).

When finished, travel time between the two major cities will reduce from 6, 5 hours to 3 hours and 10 minutes, using trains ordered from Spain that can reach up to 250 km / h.

When the third stage motor fires, within two minutes of launch, the missile is traveling faster than 20, 000 ft / s ( 6, 000 m / s ), or 13, 600 mph ( 21, 600 km / h ).

When traveling through the turns at racing speed, which may exceed 85 km / h ( about 52 mph ), the banking attempts to match the natural lean of a bicycle moving through that curve.

* When the SR-71 was retired by the military in 1990, one was flown from its birthplace at United States Air Force Plant 42 in Palmdale, California to Dulles, setting a coast-to-coast speed record at an average 2, 124 mph ( 3, 418 km / h ).

When placed in a syllable, it is e ; except when preceded by k, k < nowiki >'</ nowiki >, and h, when it is o.

When the letter " A " is falling ( i. e. a subscript ), h < sub > A </ sub > assigns to an object X the morphisms from X into A.

When a T < sub > h </ sub > cell encounters and recognises the antigen, on an APC, the TCR-CD3 complex binds strongly to the peptide-MHC complex present on the surface of professional APCs.

When not subject to overheating ( i. e. on cold days ), speeds on land of 19 – 26 km / h ( 12-16 mph ) have been recorded for short distances.

When completed, the high-speed railway network will provide fast train service from the city to Beijing, Shanghai, Nanjing, Xi ' an and Wuhan at a speed of 350 km / h.

When air conditioning was ordered, the cars received the 330 h. p.

When not sufficiently stimulated with early life diseases, the immune system will have too many T < sub > h </ sub > 2 cells present, leading to a greater risk of T < sub > h </ sub > 2 immune disorder.

When adding an affix would result in two identical vowels side by side, an epenthetic / h / is inserted to prevent the forbidden sequence.

When it is switched on, an automatic transmission can shift into overdrive mode after a certain speed is reached ( usually 70 + km / h or more depending on the load ).

h. When used substantivally, the Hebrew kol and the Greek pas may be rendered “ everyone ,” “ every man ,” or ( in the plural ) “ all people .”

When these mowers are tractor-mounted they are easily capable of mowing grass at up to 20 miles per hour ( 32 km / h ) in good conditions.

When a parcel of air descends, the pressure on the parcel increases.

When the pressure applied on a parcel of air decreases, the air in the parcel is allowed to expand ; as the volume increases, the temperature falls and internal energy decreases.

When the signal drive to the amplifier is increased, the output also increases until a point is reached where some part of the amplifier becomes saturated and cannot produce any more output ; this is called clipping, and results in distortion.

When in contact with one of the electrodes in a fuel cell, this platinum increases the rate of oxygen reduction to water, either to hydroxide or hydrogen peroxide.

When awareness is focused on memories of past experiences and mental verbalisations, the energy flow to the head chakra increases and the energy flow to the heart chakra lessens.

The argument that school vouchers increases quality and efficiencies in schools forced to compete is supported by studies such as " When Schools Compete: The Effects of Vouchers on Florida Public School Achievement " ( Manhattan Institute for Policy Research's, 2003 ), which concluded that public schools located near private schools that were eligible to accept voucher students made significantly more improvements than did similar schools not located near eligible private schools.

When this city is included, the population increases to 251, 494 for 2000.

When the table is full the code length increases to give space for more strings, up to a maximum code 4095

When a drawbar is incrementally pulled out, it increases the volume of its component waveform.

When a person has not been unconscious, failure of carbohydrate to reverse the symptoms in 10 – 15 minutes increases the likelihood that hypoglycemia was not the cause of the symptoms.

When they occurred, minimum wage adjustments generally did not keep up with cost of living increases.

When the Wall Street Crash of 1929 struck less than eight months after he took office, Hoover tried to combat the ensuing Great Depression with volunteer efforts, public works projects such as the Hoover Dam, tariffs such as the Smoot-Hawley Tariff, an increase in the top tax bracket from 25 % to 63 %, and increases in corporate taxes.

When they are both large, for instance more than 2000 bits long, randomly chosen, and about the same size ( but not too close, e. g. to avoid efficient factorization by Fermat's factorization method ), even the fastest prime factorization algorithms on the fastest computers can take enough time to make the search impractical ; that is, as the number of digits of the primes being factored increases, the number of operations required to perform the factorization on any computer increases drastically.

When this happens prejudices subside and a tendency to accommodate increases.

When observed from farther away, the image of the rows of pixels still merge, but the total image becomes smaller as the distance increases.

When over deep the lake is no more salty than the sea, but salinity increases as the water evaporates, with saturation occurring at about a depth.

When placed in benzylic or allylic positions, the C-H bond strength is decreased, and the reactivity of the methyl group increases.

When individuals can reproduce more than once, a longer survival in the reproductive phase increases the number of offspring, called survival selection.

When a star has lost enough material, its temperature increases and the ultraviolet radiation it emits can ionize the surrounding nebula that it has thrown off.

When a subtree is rotated, the subtree side upon which it is rotated decreases its height by one node while the other subtree increases its height.

When the wave enters shallow water, it slows down and its amplitude ( height ) increases.

When n people have to communicate among themselves, as n increases, their output decreases and when it becomes negative the project is delayed further with every person added.

When they rope out, the length of their funnel increases, which forces the winds within the funnel to weaken due to conservation of angular momentum.

When a warning is issued, going to a basement or an interior first-floor room of a sturdy building greatly increases chances of survival.