thermal energy is the correct answer of number 7
Answer:
It's all about Gravity. When parachutists jump and open the parachute, the parachute increases the air resistance due to which acceleration due to gravity decreases, thus parachutists land safely without getting hurt.
This is because of continuous usage, the wire loses its elasticity and dose not regain it original dimension
Answer:
Explanation:
= Heat capacity of Hg = 28 J/mol
= Change in temperature =
= Enthalpy of fusion = 2.29 kJ/mol
The number of moles is given by
Heat is given by
Heat released is given by
Total heat is given by
The total heat released is
Answer:
The uncertainty in the volume of the sphere is
Solution:
As per the question:
Measured radius of the sphere, R = 135.4 m
Uncertainty in the radius,
We know the volume of the sphere is:
We know that the fractional error for the given sphere is given by:
where
= uncertainty in volume of sphere
Now,
Now, substituting the suitable values: