Answer: n=4
Explanation:
We have the following expression for the volume flow rate of a hypodermic needle:
(1)
Where the dimensions of each one is:
Volume flow rate
Radius of the needle
Length of the needle
Pressures at opposite ends of the needle and
Viscosity of the liquid
We need to find the value of whicha has no dimensions, and in order to do this, we have to rewritte (1) with its dimensions:
(2)
We need the right side of the equation to be equal to the left side of the equation (in dimensions):
(3)
(4)
As we can see must be 4 if we want the exponent to be 3:
(5)
Finally:
(6)
Can I see the book you read for I can answer and it more info because your question doesn’t make sense
Answer:The 50-kg has the greater potential energy because it has greater mass
Explanation:
Answer:
B) a chemical change .
Explanation:
There will be no chemical reaction when the gases ammonia and carbon dioxide are mixed together . But when there is presence of ammonium hydroxide , chemical reaction takes place between carbon dioxide and ammonium hydroxide resulting into the formation of ammonium carbonate as follows
2NH₄OH + CO₂ =( NH₄)₂CO₃ + H₂O.
The growth of white crystals inside the bottle indicates the presence of ammonium carbonate .
So it is a chemical change .