Answer:
A. It is the only one that makes sense
Explanation:
The choices are confusing. Air, oil, and alcohol are fluids at any reasonable temperature. Dry cement is not.
The winter I think would be the answer
When gases, fluids, or other solids are in contact with a moving object
heat is produced due to friction.
You do this one just like the other one that I just solved for you.
For this one ...
The density of the object is 2.5 gm/cm³.
We know that every cm³ of it we have contains 2.5 gm of mass.
We have to find out how many cm³ we have.
The question tells us: We have 2.0 cm³.
Each cm³ of space that the object occupies contains 2.5 gm of mass.
So the 2.0 cm³ that we have contains (2 x 2.5 gm) = 5 gms.
That's the mass of our object.
