I'm not sure what the alien Theory says or if there really is such a theory. If the theory says that aliens definitely exist and that they have visited Earth in the past then the theory is totally and completely without any kind of support. It's not scientific in any way because there is no evidence for such a claim. It may be thought to be probable but no solid evidence has ever been presented.
Answer:
1. 2.5s
Explanation:
1. For time, divide Distance / speed
25m / 10
=2.5s
Answer:
a force is represented by a<u> vector </u>the choice of a <u>reference frame</u> is necessary
Explanation:
Its the floor pushing up on the player, this one is correct
Answer:
h = 18.4 cm
Explanation:
Given that,
The speed of the bob at the bottom of the swing is 1.9m/s.
We need to find the initial height of the bob. Let it is h.
We can find it using the conservation of energy i.e.

Where
v is speed of the bob
So,

or
h = 18.4 cm
So, the initial height of the bob is 18.4 cm.