Ascrew is a type of simple machine. if we look closely at a screw, we see that it is really a wrapped around a central core.

a) wedge
b) lever (b is incorrect)
c) fulcrum
d) inclined plane

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

a