Hey there!:
mass = 41.2 g
Volume = 8.2 cm³
Therefore:
D = m / V
D = 41.2 / 8.2
D = 5.02 g/cm³
When two forces act on an object in opposite directions, the net force can be calculated by subtracting the two forces.
<u>Explanation:</u>
- The net/final force by subtracting the two given opposite forces as asked in the above question.
For example: If you keep a bottle on the table, the downward force subtracted from the upward force will be equal to the net force.
- If the net force equals zero then the objects will be balanced, otherwise unbalanced.
For example: In the tug of war when two forces are of different units the force with the greater strength will have an advantage, like if the team on the right is stronger than that of left than the rope will move towards the right.
Answer:
b first
Explanation:
first law of thermodynamics: energy can neither be created or destroyed; however, when heat is added to a system, energy can be changed from one form to another.
As you know ethanol is a an alcohol and alcohol is a hydrocarbon. Alcohol is made up of a carbon chain which Is always non polar and a OH group which is polar. According to the solubility rule like substances dissolves like substance. Using ethanol chemical formula. Ethanol has a 2 carbon chain and a OH group. water is polar so it will be attracted to the OH group. Carbon chain on the other hand is nonpolar so it will be repelled from the water.
Therefore the Solubility of alcohols is determined by the stronger of the two forces. The strength of the attraction of the OH group, and the amount of water they dissolve in.
