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Are there any national regulations on the density of gasoline, diesel oil and crude oil,
How do you calculate the density of 0 # diesel 0.846 and gasoline (93 # and 97 # 0.738)?
There is a special densitometer for measuring the density of gasoline and diesel. Put the densitometer in a measuring cup directly. The data corresponding to the oil level is the oil density
What is the density of 97 gasoline?
The density is 0.715 ~ 0.735 with different temperature
When a copper block is heated, its temperature increases and its volume decreases___ (larger / smaller / unchanged, the same below), mass___ , density___ ．
(1) After the copper block is heated, the mass of the copper block will remain unchanged when the temperature rises; (2) because the copper block is heated, it will expand, that is, its volume will increase; (3) the density represents the mass of the material per unit volume; from the density formula ρ = MV, we know that the mass will remain unchanged and the volume will increase, so the density will decrease; therefore, the answer is: increase; remain unchanged; decrease
What are the factors that affect the density of matter? (mass, volume, temperature, or shape?) there is only one correct one
It is temperature. From physics, we know that almost all substances have the characteristics of thermal expansion and cold contraction (only water is a little special, 4 ° C water will expand when it is cold and hot). When the mass of the constituent substance does not increase, there is a corresponding relationship between the volume and temperature of the substance. When the temperature increases, the volume increases, the density of the substance decreases, and vice versa
When the temperature of a certain mass of gas increases, the volume of gas increases_____ And its density_____ When the temperature decreases, the volume decreases____ , density_____
I'm glad to answer your question
When the temperature of a certain mass of gas increases, the volume [increases], the density [decreases],
When the temperature decreases, the volume becomes smaller and the density becomes larger
When the temperature of a piece of iron increases, analyze how its mass, volume, density, etc. change
The mass m is constant
The volume V increases slightly due to thermal expansion
The density p = m / V, P decreases slightly
From 0 ℃ to 4 ℃, water expands. From 0 ℃ to 4 ℃, the volume and density of a certain mass of water increase slightly with the increase of temperature
Water has the phenomenon of expansion. Volume slightly -- density slightly——
From 0 ℃ to 4 ℃, the volume and density of a certain mass of water decrease slightly and increase slightly with the increase of temperature
When the temperature of the liquid and the volume density of the gas decrease obviously, the volume density of the gas increases?
The volume becomes larger and the density becomes smaller; the volume becomes smaller
What is the density of a certain mass of closed gas when its volume expands
The density becomes smaller
Mass = volume * density
Mass (constant) = volume (increasing) * density (decreasing)
It can't be expressed by formula, only by Chinese characters
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