Strontium and copper nitrate
When a sample is melted and then solidified again, impurities or small changes in the sample's composition can occur, leading to a different melting point. These impurities or composition changes can affect the crystal structure and interactions in the material, resulting in a shift in the melting temperature.
Characteristic properties of a substance do not change when the sample changes. These properties, such as melting point, boiling point, density, and chemical reactivity, are inherent to the substance itself and remain constant regardless of the size or form of the sample.
Reagent strips change color by reacting with specific substances present in the sample being tested. This reaction causes a chemical change, resulting in a visible color change on the strip. The intensity of the color change can indicate the concentration of the target substance in the sample.
Continuous sample = Slope of curve of change
think of it as this viscosity is thick when it is heated what will happen
No. Only a census can ACCURATELY predict the outcomes: a random sample cannot.
The difference between the temperature at which the sample begins to melt and at the temperature at which the sample completely melted-
sample
Strontium and copper nitrate
When a sample is melted and then solidified again, impurities or small changes in the sample's composition can occur, leading to a different melting point. These impurities or composition changes can affect the crystal structure and interactions in the material, resulting in a shift in the melting temperature.
Melting a sample of gold is an example of a physical change.
The sample mean may differ from the population mean, especially for small samples.
A Representative sample of the population
A Representative sample of the population
To predict the number of females in the school, we can use the proportion of females from the sample. In the sample, 30 out of 75 students are female, which is 40%. Applying this percentage to the total student population of 1000, we estimate that there are approximately 400 females in the school (0.40 * 1000 = 400).
the means does not change