It is like that, except most nails are steel or stainless steel, slowing to rusting process to about 5 years.
In an uniform circular motion, the direction of the net force on the object is radially inward, passing through the center of the circle.
Answer:
Explanation:
Given
Lowest four resonance frequencies are given with magnitude
50,100,150 and 200 Hz
The frequency of vibrating string is given by

where n=1,2,3 or ...n
L=Length of string
T=Tension
Mass per unit length
When string is clamped at mid-point
Effecting length becomes 
Thus new Frequency becomes

i.e. New frequency is double of old
so new lowest four resonant frequencies are 100,200,300 and 400 Hz
Answer:
5558643.69 N
Explanation:
F = Force
v = Velocity = 31.5 knots
Converting to m/s


Power is given by

The forward force is exerted on the ship at this highest attainable speed is 5558643.69 N