As the elevator (lift) moves to the top of the ramp, the skier's potential energy <u>increasing </u>.
<h3>What is potential energy?</h3>
Potential energy is a form of stored energy that is dependent on the relationship between different system components. A spring has more potential energy when it is crushed or stretched.
A steel ball has far more potential energy raised above the ground than has after falling to Earth. In the raised position it is capable of doing more work.
Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the raised ball has more potential energy as they become further apart.
Learn more about Potential energy
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It determine Gibbs free energy
So,
To find the number of moles in 90g of NaOH, what we do is to divide the given amount by the molar mass of NaOH.
The molar mass of NaOH is 40g/mol.
So,
Therefore, the correct answer is A. 2.25moles
Answer:
6g/mL
Explanation:
The density, which is the mass per unit volume of an object, can be calculated using the formula;
D= m/v
Where; D = density (g/mL)
M = mass of substance (g)
V = volume (mL)
In this question, the object's mass = 15g, volume of water= 2.5 mL, d =?
Therefore,
Density = 15/2.5
Density = 6 g/mL
The object's density is 6g/mL
C. Their components can be separated by physical processes.