I think the answers are box #1 and #3. It is number one for a fact. However, it depends where the start is at #3.
Answer:
B.convection currents in the mantle
Explanation:
Answer:
7.50 m/s^2
Explanation:
The period of a pendulum is given by:
(1)
where
L = 0.600 m is the length of the pendulum
g = ? is the acceleration due to gravity
In this problem, we can find the period T. In fact, the frequency is equal to the number of oscillations per second, so:

And the period is the reciprocal of the frequency:

And by using this into eq.(1), we can find the value of g:

Answer:
True
Explanation:
East, up, and left all define as a direction.