The answer for the question is D.
C, all cells contain chloroplast, is not part of the cell theory.
Answer:
The angular speed is 4.22 rpm.
Explanation:
Given that,
Length of arm = 6.75 m
Mass of Europa
Diameter = 3120 km
We need to calculate the angular speed
Using formula of gravitational force
Put the value into the formula
Hence, The angular speed is 4.22 rpm.