Hydropower is electricity generated by harnessing the energy of moving water. This kind or energy provides almost one fifth of the world's electricity.
- Mass (m) = 1 Kg
- Acceleration due to gravity (g) = 9.8 m/s^2
- We know, weight = mass × acceleration due to gravity.
- Therefore, weight of the object
![= 1kg \: \: \times 9.8 {ms}^{ - 2} \\ = 9.8 \: \: N](https://tex.z-dn.net/?f=%20%3D%201kg%20%5C%3A%20%20%5C%3A%20%20%5Ctimes%209.8%20%7Bms%7D%5E%7B%20-%202%7D%20%20%5C%5C%20%20%3D%209.8%20%5C%3A%20%20%5C%3A%20N)
<h3>Answer:</h3>
B. 9.8 N
Hope you could get an idea from here.
Doubt clarification - use comment section.
C. A magnet causing a metal object to move
Answer:
The volume of solution in liters required to make a 0.250 M solution from 3.52 moles of solute is 14.08 liters of solution
Explanation:
The question relates to the definition of the concentration of a solution which is the number of moles per liter (1 liter = 1 dm³) of solution
Therefore we have;
The concentration of the intended solution = 0.250 M
Therefore, the number of moles per liter of the required resolution = 0.250 moles
Therefore, the concentration of the required solution = 0.250 moles/liter
The volume in liters of the required solution that will have 3.52 moles of the solute is given as follows;
The required volume of solution = The number of moles of the solute/(The concentration of the solution)
∴ The required volume of solution = 3.52 moles/(0.250 moles/liter) = 14.08 liters
The required volume of solution to make a 0.250 M solution from 3.52 moles of solute = 14.08 liters.
Therefore the number of liters required to make a 0.250 M solution from 3.52 moles of solute = 14.08 liters.