There you go , This is my work i have did on that subject area
You can have as many controls as necessary, But they must remain equal at all times in order to get the most accurate results
Answer:
C
Explanation:
the n value must always be greater than the l value
Answer:True
Explanation:
Water is said to be hard when it contains calcium ions or magnesium ions dissolved in it. These ions are able to react with soap in such a way that the soap is prevented from forming lather with the water. Hard water occurs when water passes over calcium or magnesium bearing minerals and dissolves some of it. Hardness due to the presence of calcium ions can easily be removed by boiling the water.
Heat moves easily through good conductors of heat (such as metals) and very slowly through heat insulators (such as wood or plastic).
:)
