Answer: The weight of a girl with a mass of 40kg is 392.266 Newtons.
Explanation:
We are given with 98 Newton weight of an object on the surface of the earth with an acceleration equal to 9.8 m/s2. This means the mass of the object is equal to 98/9.8 or 10 kg. Hence the weight of the object 10,000 kilometers above sea level where acceleration is 1.49 m/s2 is 14.9 Newtons.
The water would be because however much salt you add the water rises
