Which of these reactions is responsible for energy radiating from stars, including the Sun?
1 answer:
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Explanation:
Given that,
The mass of rock, m = 2.35-kg
It was released from rest at a height of 21.4 m.
(a) The kinetic energy is given by :
As the rock was at rest initially, it means, its kinetic energy is equal to 0.
(b) The gravitational potential energy is given by :
It can be calculated as :
(c) The mechanical energy is equal to the sum of kinetic and potential energy such that,
M = 0 J + 492.84 J
M = 492.84 J
Hence, this is the required solution.
Answer:
Given:
Weight of solid in air,
Weight of solid in water,
Weight of solid in liquid,
Solution:
Calculation of:
1. Relative density of solid,
2. Relative density of liquid,
3. Density of liquid in S.I units:
Also, we know:
where
= density of liquid
= density of water
Now, from the above formula: