Answer:
The average speed of the elevator going down in the abandoned mine is 17.722mph.
Explanation:
If the elevator takes 90 seconds to descend a height of 713m, the average speed of the elevator is:

And if 1m/s is 2.23694mph, the average speed is:
.
Answer:
True
Explanation:
The smaller object usually moves towards the larger object, because the larger object has more mass than the smaller object, so it has a larger gravitational pull.
As we know that force F makes an angle of 60 degree with X axis
so the X component is given as

now we have


Similarly we know that force F makes an angle of 45 degree with Y axis
so the X component is given as

now we have


Now for the component along z axis we know that

now plug in all components





According to wikipedia <em>a mid-ocean ridge is an underwater mountains system formed by tectonic plates.
</em>Happy studying!<em>
</em>