Answer:
C. both a speed and a direction
Answer:
No because you cannot see air so therefore it cannot make shadows
Explanation:
Answer:
Explanation:
Given
mass of boy 
mass of girl 
speed of girl after push 
Suppose speed of boy after push is 
initially momentum of system is zero so final momentum is also zero because momentum is conserved




i.e. velocity of boy is 2.82 m/s towards west