Answer:
Mass doesn't change.
Weight is measured based on gravitational pull.
Explanation:
Answer:
d. H + O2 ------ H2O
that's the formation of water
Answer:
A(many people think that no energy or matter exists outside the universe)
Explanation:
Answer:
The diameter of wire should be
m
Explanation:
Given:
Current density

Current
A
From the formula of current density,

Where
area of cylindrical wire = 



m
For finding the diameter of wire,

m
Therefore, the diameter of wire should be
m
Answer:
beacause it's contracts
Explanation:
when using a large bottomed glass the hot water cools that's why is good to use thin bottomed glass