Answer:
B. -40 kgm/s is the answer
v = f lambda
in vac ... 3X10^8 = 600x10^-9xf
in glass speed slower, poss 2/3 that of vacuum
one disadvantage is that magnets the opposites attract so the same type of magnets like n+n will keep repelling unless you use the opposite side of the magnet the it will attract
Answer:
Force exerted by the air on the propellers = 46000 - 9200
= 36800 N
Hope this helps!
<span>For any sounds to reach your ear, it would need a medium (fluid, solid) to propagate.
(lol u def)</span>
