The density of water at 34 8 degrees Celsius summer is 5

Is it just a piece of water? Seawater and freshwater are not the same how.

The density of water at different temperatures is as follows:

The density of water at 0 degrees Celsius is kilograms per cubic meter; The density of water at 1 degree Celsius is kilograms per cubic meter; The density of water at 2 degrees Celsius is kilograms per cubic meter;

The density of water at 3 degrees Celsius is kilograms per cubic meter; The density of water at 4 degrees Celsius is kilograms per cubic meter; The density of water at 5 degrees Celsius is kilograms per cubic meter.

The chemical formula of water is H2O, which is an inorganic substance composed of hydrogen and oxygen, which is non-toxic and drinkable. It is a colorless and odorless transparent liquid at room temperature and pressure, and is known as the source of human life.

The density of water under standard conditions is grams per cubic centimeter, the density of water is not a stable value, and the density is greater when the temperature is low than when the temperature is high.

Relationship between the density of water and temperature:

Water is special, there is 'abnormal expansion', that is, heat shrinkage and cold expansion at 0-4, at this time, the temperature rises, and the density of water increases; Above 4 is normal, the temperature increases, and the density of the water decreases.

As a result, the fish can survive in a cold winter, because from the bottom to the top, the temperature decreases from 4 to 0 (the ice-water interface), and then the ice.

The statement that water is densest at 4 degrees Celsius is true.

Analysis: The density of general objects decreases when the temperature increases, and increases when the temperature decreases, because the general objects obey the law of thermal expansion and cold contraction. That is, when the temperature increases, the volume of the object increases (the mass does not change), so the density decreases, and when the temperature drops, the volume of the object decreases (the mass does not change), so the density increases.

Density: Density is a measure of the mass within a specific volume, density is equal to the mass of an object divided by volume, which can be expressed by symbols, in the International System of Units and Chinese legal units of measurement, the unit of density is kilograms per cubic meter, and the symbol is kg m3.

Generally speaking, no matter what substance it is in, no matter what state it is in, with the change of temperature and pressure, the volume or density will also change accordingly. The relationship between the three physical quantities of temperature t, pressure f, and density is called the equation of state.

If it is 4 degrees Celsius, the state traces are under the piece:

The density of water is: 1kg l

1000ml=1l

1kg l *1l=1kg=2 catties.

The density of p at any point in an object is defined as:

where <>

v is the volume element containing the p-point; <>

m is the mass of the volume element. In the centimeter-gram-second system, the unit of density is gram centimeter3; In the International System of Units and the Chinese Legal Unit of Measurement, the unit of density is kilogram m3.

The density of water at four degrees Celsius is 1 kilogram per cubic decimeter, which is also 1 10 kilograms per cubic meter.

Water is densest at four degrees Celsius and becomes less dense when the temperature is above or below four degrees Celsius. However, this change is very small, and it is ignored in physical calculations, and 1,000 cubic decimeters or 1 10 kilograms of cubic meters of scum are often used as the density of water.

1. The density of water is the largest at 4 degrees Celsius, when it is greater than 4 degrees Celsius, it is thermal expansion and cold contraction, and when it is less than 4 degrees Celsius, it is thermal contraction and cold expansion, according to the formula p=m v, it can be concluded that the density of water is the largest at 4 degrees Celsius.

2. Under the pressure of an atmospheric potato (105Pa), when the temperature is 4, the density of water is the maximum (1g cm3), and when the temperature is lower than or higher than 4, its density is less than 1g cm3.

The density of water at 30 degrees is.

Table of water density at 15-30 degrees.

Density: Mass per unit of body rock slowly starts and accumulates coarsely.

quality within.

It is usually a colorless, odorless liquid.

Boiling point: When the air pressure is one standard atmosphere, that is.

Freezing point: 0

Triple point: temperature at maximum relative density:

Specific heat capacity: 15 Latent heat of evaporation: 100

Density: The density of water is maximum at 1 103 kg m3, when water is at 0, the density is kg m3, and when ice is at 0, the density is kg m3.

Critical temperature: Thermal conductivity: At 20, the thermal conductivity of water is j s·cm·k, the thermal conductivity of ice is j s·cm·k, and when the density of snow is kg m3, the thermal conductivity of snow is j s·cm·k.

Buoyancy classification: levitation, floating, sinking bottom, floating, sinking.

Various physical parameters of water at different temperatures: TP

c a temperature.

Pressure specific heat capacity.

Thermal conductivity. Thermal diffusivity.

kpakj/（kg·k）

w/（m·k）10m/h

Changes in water density.

The density of water is the largest at 1000kg m3, when the temperature is higher than (can also be ignored as 4), the density of water decreases with the increase of temperature, at 0, the water heat shrinks and rises, and the density increases with the increase of temperature.

water (20 photos).