21. A ball is dropped straight down to the ground from the top of a building. The wind blows from the east, pressing on the ball with a force of 5 newtons. How does the wind most likely affect the motion of the ball?
A. The wind is an unbalanced force and will cause the ball to change directions.
B. The wind is a balanced force and will not make any changes to the motion of the ball.
c. The wind is a balanced force and will cause the ball to change directions.
D. The wind is an unbalanced force and will not make any changes to the motion of the ball.

Is there any opitions? if you have the periodic table, the noble gases are 8a family, the halogen are the 7a family, and the nonmetal are  carbon, nitrogen, phosphorus, oxygen, sulfur, selenium, fluorine, chlorine, bromine, iodine and astatine.

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

120v is the answer i am positive tell me if this was correct