An earthquake's epicenter is the place on earth's surface directly above the focus.
reason : the epicenter lie above the focus where the disturbance starts.
when an earthquake occurs, energy radiates in all directions from its source, which is called the focus
reason : because the disturbance starts from the focus below the epicenter.
earthquakes are usually associated with faults
reason : earthquake arise from the disturbance or faults of the plates of the earth inside.
Answer:
Three lunar eclipses every year.
Explanation:
A lunar eclipse only occurs during a full Moon, when the Sun, Earth and Moon are all aligned. But despite the Moon only taking 29.5 days to orbit Earth and complete a cycle from full Moon to full Moon, there are only on average about three lunar eclipses every year.
The maximum height is equal to 860.04m
Why?
We can find the maximum height of the object in two steps.
First step: Finding the initial speed.
Then,
Second step: Find the maximum height.
Now, again using the second equation, we need to subsitutite the obtained value for the initial speed into it, so:
Hence, we have that the maximum height is equal to 860.04 meters.
Have a nice day!
Power:
P= A/t
A = F · h = m · g · h
P = m · g · h / t, m = 7.5 kg, g = 9.81 m/s², h = 8.2 m, t = 1800 s
P = 7.5 · 9.81 · 8.2 / 1800 = 0.335 W