Answer:
D IS MY ANSWER N2 TO UREA HOPE ITS HELFUL
Answer:
A
Explanation:
The next step would be precipitation falling
A is an example of physical change
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
.
X-rays have the shortest wavelength of any waves on that particular list.
Gamma ray waves are shorter than X-rays, but they're not on that list.