According to parallelogram law of vector addition :
Answer:
true
Explanation:
Cellouse is a hard substance which helps to protect the cell
A scientist can assess whether a pure niobium sample is responsible for contaminating the lab with radioactivity by testing the sample. By testing the niobium sample, a scientist can determine whether it has any other element.
Density is defined as an object's mass per a given unit of volume. So, if you know the object's density, and you're able to weigh it, you can determine its volume with the equation:
Volume = weight / density
<em>There is a link in the Resources section to a web page which lists the densities of some common materials. Note that density changes with pressure or temperature</em>.