Answer:
0.08735 kgm²
Explanation:
m = Mass of lower leg = 5 kg
L = Length of leg = 18 cm
g = Acceleration due to gravity = 9.81 m/s²
f = Frequency = 1.6 Hz
I = Moment of inertia
Time period is given by

Also

So,

The moment of inertia of the lower leg is 0.08735 kgm²
Well the object will have no Momentum since it is not moving, so a small object that is going 10 mph will have Momentum.
The sun is made mostly up of Hydrogen.
The primary coil has more turns than the secondary coil. so D.
Maybe, but she hasn't proved it yet. As another example, somebody may bring a jar of gas to your laboratory, and you test the gas in the jar and you find nitrogen atoms, oxygen atoms, argon atoms, and krypton atoms, and there isn't a single compound in it. The gas in the jar is a MIXTURE of gases . . . a mixture that we call "Air".