Answer:
If the mass of a sample of aluminum foil is known, then it is possible to calculate the volume of the foil. In general volume is the product of length times width times height of an object. If we know the length and width of a piece of foil, we can then determine its height, or thickness.
sorry if wrong
Roof lights, dormer windows or other roof extensions. Planning permission is not required provided that: 1. No part of the roof light, dormer or extension is higher than the highest part of the existing roof.
Answer: B
Explaination: The liquid solution changed color means is turned into a different substance with different properties. It is chemical change .
The movement of gases through pinhole is called effusion and the effusion rate indirectly proportional to the molar mass of gas
The lighter mass gas effuses faster than the heavier one
so He(g) will escapes faster and it will move with higher average speed because it has less mass than Ne(g)
