Answer:
A:75 seconds
Explanation:
1.5 km/72 km/h = 0 0208 h = 1.25 minutes = 75 seconds
Answer:
plateau, mountains, hills, plains
Answer:

Explanation:
It is given that,
Speed of P- waves, v = 9 km/s = 9000 m/s
The density of rock is about 
We need to find the average bulk modulus of Earth's crust. Let it is given by B. So,

So, the bulk modulus of the Earth's crust is
.
KE = ½mv²
<span>1.1 x 10^9 = ½ x 8 x 10^4 v²
v² = 2.75 x 10^4
v ≈ 165.8 m/s</span>
The answer should be the letter C...