Question 1.
- mass = 4500 kg
- potential energy (p.e) = 67500 J
now, we know :
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=》
=》
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note : if we take acceleration due to gravity as 9.8, then height = 1.53 m
Question 2.
- mass = 4500 kg
- kinetic energy = 63000 j
we know,
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=》
=》
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=》
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or
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The solutions would be :
1. C
2. B
3. A
4. C
5. D.
When a large rock is weathered into tiny pieces which add up the weight of the original rock, this demonstrates the law of conservation of matter.
According to this law the mass of an object doesn't change with time and also it does not depends on how the particles are arranged themselves.
Hence, option (C) is correct.
Answer: B - 8
Explanation: 8 protons because number of protons is equal to number of atoms in the nucleus.
It took so long because at the time there was no way for people to study the behavior formally. im not sure what helped it get recognized but i know wihelm wundt helped get it recongnized.
sorry i couldnt be much help
