Answer:
A
Explanation:
According to law of conservation of momentum, the total momentual in the system will be conserved
-- Each square meter of the bottom of the tank has 4 cubic meters
of water standing on it.
-- 4 cubic meters of water is equivalent to 4,000 liters.
-- So its mass is roughly 4,000 kilograms, and its weight is roughly
(4,000 x 9.81) = 39,240 newtons.
-- So the pressure on the bottom is roughly 39,240 newtons per
square meter, or 39,240 pascals, or <em>39.24 kPa</em>.
Speed = (distance covered) / (time to cover the distance).
The speed of anything that covers 42 meters in 7 seconds is
(42 meters) / (7.0 seconds)
= (42 / 7.0) (meters/second)
= 6.0 m/s .
Answer:
I am pretty sure it's A power