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Leona [35]
3 years ago
11

Gravity is a force that helps to hold the universe together.true or false

Physics
2 answers:
Valentin [98]3 years ago
7 0
Yes, this is a true statement.



gravity is so important.
Pie3 years ago
5 0

Answer:

True

Explanation:

Gravity is a force that helps to hold the universe together. The statement is true. The gravitational force is always attractive in nature. It depends on the masses and the distance between them. Mathematically, it is given by :

F=G\dfrac{m_1m_2}{d^2}

Where

G = universal gravitational constant

m₁ and m₂ are masses

d is the distance between them

Gravity is responsible to hold the planets in an orbit around the sun. Ocean tides are also caused due to gravitational pull of the moon. If gravity is not present in the universe then there would be no moon, no stars etc.

Hence, the given statement is true.

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U235 + n → Xe134 + Sr100 + 2n
xenn [34]
Nuclear fission formula by the looks of it. Possibly how Professor Lisa Meitner realised that she had split the atomic nucleus. The Xenon and the Strontium (Xe and Sr) would presumably show up in a radio chemical assaying test at her university. 
A few years later, Professor J Robert Oppenheimer watched a nuclear test somewhere near Los Alamos, US and lamented "I am become death, the destroyer of worlds". Shortly thereafter, Hiroshima and Nagasaki were razed to the ground and annihilated by nuclear bombs. Professor Meitner, probably inadvertently, had got the keys to the doors to "nuclear hell", and JRO ended up turning them. Something like that maybe, and a very harrowing and tumultuous period in human history.
Note in the fission equation, that out come two neutrons. They go off and produce a similar fission in another U235 nucleus into a chain reaction which, i not moderated by, say, Boron, can end up as a "mushroom cloud".
8 0
2 years ago
Please !!! I really need help !!! How do I understand these ?!!!!
trasher [3.6K]

Answer

The answer for the first one I think is false.

The second one would be true i think. I hope i got it right and have a wonderful day

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3 years ago
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