The right answer for the question that is being asked and shown above is that:
The density of a certain object can be solved using two parameters: The mass and the volume.
Density = mass / volume.
So, from the given question, we are lacking on what the volume is.
Answer: Hydrogen
Explanation:
Because it is the element that everything is created with it is everywhere. All life has hydrogen in it, our air, SPACE, everything.
Answer:
You should never take shelter under a tree when lightening. You should get away from the tree and get as low down to the ground as possible. You do not always have enough time to get to a building so it depends on your surroundings/situation.
Explanation:
Hope this helps!