Answer:
Hey!
Your answer should be D!
Explanation:
In a transformer Np / Ns is called the voltage ratio. If Ns is less than Np then Vs is less than Vp. This is called a step-down transformer as the voltage is reduced.
(source from google.com!)
Explanation:
Below is an attachment containing the solution.
Answer:
The darts hit the same general area of the board.
Answer:

Explanation:
Dimensions of mattress 100 cm by 194 cm by 14 cm
= Mass of mattress = 4 kg
= Density of water = 
g = Acceleration due to gravity = 
Volume of mattress

Weight of water displaced is equal to the buoyant force
Mass of water

Mass of person would be

Weight of the person would be

The air mattress could hold a person that weighs up to
.