Sam, whose mass is 78 kg , takes off across level snow on his jet-powered skis. the skis have a thrust of 180 n and a coefficient of kinetic friction on snow of 0.1. unfortunately, the skis run out of fuel after only 10 s . part a what is sam's top speed?

13.2 m/s

Explanation:

Given

mass of sam

Thrust force=180 N

coefficient of kinetic friction

Force acting on sam is thrust force, friction force

Therefore its top speed is

v=u+at

here u=0 initial velocity

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.