Answer:
If she is walking 30 feet every 10 seconds, that means she is walking 180 feet per minute. Multiply that by the 60 minutes in an hour, means she walks (180x60)= 10,800 feet an hour.
She walks 3 feet a second.
She walks 180 feet a minute.
She walks 10,800 feet an hour.
Explanation:
Answer: 2933 kg
Explanation:
Given
From the law of conservation of linear momentum, we know that
m(i)v(i) = m(f)v(f), where there is no external force acting on the system
m(i) = initial mass of the freight car system
m(f) = maximum mass of the freight car system
v(i) = initial linear velocity of the system
v(f) = final linear velocity of the system
2000 * 4.4 = m(f) * 3
3m(f) = 8800
m(f) = 8800 / 3
m(f) = 2933.3 kg
Therefore the maximum mass of grain that it can accept is 2933 kg
Answer:
77.9 km/h
Explanation:
We determine the initial momenta of lion and gazelle.
Lion: 173 × 80.9 = 13995.7
Gazelle: 36.2 × 63.8 = 2309.56
Since they are running in the same direction, we add their momenta to get the total initial momentum:
After the collision, they are together and have a common velocity. Hence, the total final momentum is
By the principle of conservation of momentum, the total initial momentum is equal to the total final momentum, provided there are no external forces.
Explanation:
water? if that what the question means