<u>Answer:</u>
Mass of water fell on the town =
<u>Explanation:</u>
The mass of one cubic meter water =
We need to find volume of water in cubic meter to find total mass fell on the ground.
We know volume = Area* Height
Area =
Height = 2.9 inch = 0.07366 m
Volume =
Mass of water =
Translation
A 100kg roller coaster reaches the first hill at 2m / s. the height of the first hill is 20 meters. *Find the total energy* Question added
Answer:
19820 J
Explanation:
Total energy is the sum of kinetic and potential energy
Potential energy is given by mgh
Kinetic energy is given by
The combination will then be and substituting m for 100 Kg and 2 m/s for v then taking g as 9.81 while h is given as 20 m we obtain energy as
We know,
V= f× wavelength
10.5= f×0.15
f=10.5/0.15
f= 70 Hz