Answer:
ice forming and then melting back into water
Answer:
Impulse = change in momentum w bounce
There are 2 impulses acting. Recoil of the fan going the negative direction and the impulse of the air bouncing off the sail. The greater impulse will bounce so the direction will be to the right moving the craft.
i’m pretty sure it’s , the alkali metals
Height and depth..... for sure....
