Certain primitive salamanders in the families Sirenidae, Hynobiidae and Cryptobranchidae practice external fertilisation in a similar manner to frogs, with the female laying the eggs in water and the male releasing sperm onto the egg mass.

On average, the Atlantic is the saltiest major ocean ; surface water salinity in the open ocean ranges from 33 to 37 parts per thousand ( 3. 3 – 3. 7 %) by mass and varies with latitude and season.

Archipelagos may be found isolated in bodies of water or neighboring a large land mass.

The propagation of sound waves in a fluid ( such as water ) can be modeled by an equation of motion ( conservation of momentum ) and an equation of continuity ( conservation of mass ).

If the boat floats, the mass of the boat ( plus contents ) as a whole divided by the volume below the waterline is equal to the density of water ( 1 kg / l ).

To implement a surface of constant potential energy quantitatively, let the height of the water be: then the potential energy per unit mass contributed by gravity is and the total potential energy per unit mass on the surface is

The energy needed to increase the temperature of a given mass of water by 1 ° C at atmospheric pressure depends on the starting temperature and is difficult to measure precisely.

On the other hand, Terrence P. Moran of the NCTE has compared the use of doublespeak in the mass media to laboratory experiments conducted on rats, where a batch of rats were deprived of food, before one half was fed sugar and water and the other half a saccharine solution.

The roots of the plants bind the soil together, and interweave with other roots, forming a more solid mass that is less susceptible to both water and wind erosion.

They also contribute to the desired effect of converting the ( kinetic energy ) push of the sloped wave face combined with the rider's mass on the sloped wave face ( potential energy ) into redirected energy-lift ( lift ( physics ))-the surfer deflects his surfboard and fins off the water of the wave face ( and / or vice-versa ) to make forward progress across the wave face, or " down the line ," that is, parallel to the wave crest and beach-riding parallel to the crest ( perpendicular to the pull of gravity down the wave's slope ) in this way is known as " trimming.

Europa is thought to contain 8 % ice and water by mass with the remainder rock.

The head is the energy per unit weight ( or unit mass ) of water.

In chemistry, hydrophobicity ( from the Attic Greek hydro, meaning water, and phobos, meaning fear ) is the physical property of a molecule ( known as a hydrophobe ) that is repelled from a mass of water.

When ice melts, it absorbs as much energy as it would take to heat an equivalent mass of water by 80 ° C.

The mass and drag of the moving water creates the resistance.

Hydrogen has also been proposed for use in these engines and would provide much greater specific impulse ( thrust per kilogram of reaction mass ), but it has been claimed that water will beat hydrogen in cost / performance terms despite its much lower specific impulse by orders of magnitude.

He can temporarily add the mass of a body of water to his own, increasing his mass, size, and strength.

While the outer islets and water rights are part administered by the Fish and Wildlife Service, the actual land mass remains under Navy control for cleanup purposes.

For example, oxygen makes up about < sup > 8 </ sup >/< sub > 9 </ sub > of the mass of any sample of pure water, while hydrogen makes up the remaining < sup > 1 </ sup >/< sub > 9 </ sub > of the mass.

alt = Map displaying a looping line with arrows indicating that water flows eastward in the far Southern ocean, angling north east of Australia, turning sough after passing Alaska, then crossing the mid-Pacific to flow north of Australia, continuing west below Africa, then turning northwest until reaching eastern Canada, then angling east to southern Europe, then finally turning south just below Greenland and flowing down the Americas ' eastern coast, and resuming its flow eastward to complete the circle

The dense Mediterranean water sinks below the Black Sea inflow to a depth of, then flows through the Dardanelles Strait and into the Sea of Marmara at velocities of 5 – 15 cm / s.

They can cause flooding and damage in neighbourhoods, as the water flows over the surface towards a low point.

Mediterranean water flows into the Black Sea as part of a two-way hydrological exchange.

After the Mekong's waters crest — when its downstream channels can handle the volume of water — the flow reverses, and water flows out of the engorged lake.

A film of water flows over the base of the cone, which contains the 40 names included.

Since water that flows through a cave eventually comes out in streams and rivers, any pollution may ultimately end up in someone's drinking water, and can even seriously affect the surface environment, as well.

This makes water the element with the greatest number of sides, which Plato regarded as appropriate because water flows out of one's hand when picked up, as if it is made of tiny little balls.

Instead of trapping precipitation, which then percolates to groundwater systems, deforested areas become sources of surface water runoff, which moves much faster than subsurface flows.

Gully erosion occurs when runoff water accumulates, and then rapidly flows in narrow channels during or immediately after heavy rains or melting snow, removing soil to a considerable depth.

At extremely high flows, kolks, or vortices are formed by large volumes of rapidly rushing water.

Soil compaction also affects the permeability of the soil to water, and hence the amount of water that flows away as runoff.

This increased runoff, in addition to eroding and degrading the land that it flows over, also causes major disruption to surrounding watersheds by altering the volume and rate of water that flows through them, and filling them with chemically polluted sedimentation.

The Balikh receives most of its water from a karstic spring near ' Ayn al -' Arus and flows due south until it reaches the Euphrates at the city of Ar-Raqqah.

From the interior to the outlet at the St. Lawrence River, water flows from Superior to Huron and Michigan, southward to Erie, and finally northward to Lake Ontario.

The water in lakes, rivers, and aquifers then either evaporates back to the atmosphere or eventually flows back to the ocean, completing a cycle.

Parts of hydrology concern developing methods for directly measuring these flows or amounts of water, while others concern modelling these processes either for scientific knowledge or for making prediction in practical applications.

Hydrology considers quantifying surface water flow and solute transport, although the treatment of flows in large rivers is sometimes considered as a distinct topic of hydraulics or hydrodynamics.

He could not afford to lose a drop of the precious water, so he spent most of his waking hours along the ditches in his meadows.

The sight of sleek inboards, outboards, and sailboats being wheeled smartly along highways many miles from any water is commonplace.

There the bus turned right along the Bosphorus, past ocean liners at anchor, to Galata Bridge over the entrance to the Golden Horn, a brown sweep of water that empties into the Bosphorus.

You cannot get along without an adequate supply of pure water.

The seemingly quiet ocean had crashed a wall of water from 10 to 100 feet high upon beaches crowded with bathers, drowning thousands of them and flattening villages along the shore.

The boy usually was sent out at about that time with the water, and he always dragged an old snow-fence lath or a stick along, to play with.

They are superficially similar to reptiles but, along with mammals and birds, reptiles are amniotes and no longer require water bodies in which to breed.

Aegean surface water circulates in a counter-clockwise gyre, with hypersaline Mediterranean water moving northward along the west coast of Turkey, before being displaced by less dense Black Sea outflow.

East-west trending faults and the karst topography present along the northern border of the Amazon basin may have some role in supplying water to the river.

The city centre is laid out on two perpendicular axes: a water axis stretching along Lake Burley Griffin, and a ceremonial land axis stretching from Parliament House on Capital Hill north-eastward along ANZAC Parade to the Australian War Memorial at the foot of Mount Ainslie.

The Overland Telegraph line was constructed in the 1870s along the route identified by Stuart, who had found enough water to support the needed repeater stations.

The trunk limbs are beaten in a metachronal rhythm, causing a flow of water along the midline of the animal, from which it derives oxygen, food and, in the case of the Anostraca and Notostraca, movement.

Submarine channels are similar to land rivers, but they are formed by density currents — underwater flow mixtures of sand, mud and water that are denser than sea water and so sink and flow along the bottom.

A series of paddles on chains moved along the bottom of the boat to propel it over the water.

To remedy this, Brueys sent foraging parties of 25 men from each ship along the coast to requisition food, dig wells and collect water.

illegal logging activities throughout the country and strip mining for gems in the western region along the border with Thailand have resulted in habitat loss and declining biodiversity ( in particular, destruction of mangrove swamps threatens natural fisheries ); soil erosion ; in rural areas, most of the population does not have access to potable water ; declining fish stocks because of illegal fishing and overfishing

Cayuga Lake is the source of drinking water for several communities, including Lansing near the southern end of the lake along the east side, which draws water through the Bolton Point Municipal Water system.

Capybaras are semiaquatic mammals found throughout almost all countries of South America ( except Chile ) in densely forested areas near bodies of water, such as lakes, rivers, swamps, ponds and marshes, as well as flooded savannah and along rivers in tropical forest.

Acetyl-CoA along with two equivalents of water ( H < sub > 2 </ sub > O ) are consumed by the citric acid cycle producing two equivalents of carbon dioxide ( CO < sub > 2 </ sub >) and one equivalent of HS-CoA.