Epidermis is the top layer of the skin, the part of the skin you see.
Dermis is the second layer of skin. It's much thicker and does a lot for your body.
Subcutaneous fat is the bottom layer.
Hope I helped.
Lets use the expression
F = k*x
Where k is the spring constant [N/m]
And x the distance from the equilibrium position.
This force is equal to the force due to the acceleration of gravity
F = k*x = m*g
F = 525[N/m]* 0.30 [m] = 157.5 [N]
157.5 [N] = m *10[m/s**2] ...................> m = 15.75 kg
The answer is D. <span>d. Event 4 may cause a hurricane and Event 2 may cause a tornado.
Event 4, the difference in pressure cause by this will resulted in the air to start moving uncontrollably, which ending up in Hurricane
Event 2, this will create energy needed for thunderstorm to be formed which could lead to Tornado</span>
It's called rifling, to stabilise the bullet.