Water is made to fall drop by drop on the surface of a pool at the rate 120 drops per minute. As a result, circular ripples are formed on the surface and the distance between the third circle and the seventh circle is 60m. a)Calculate the frequency, period and wavelength.
b)Deduce the speed of propagation of the waves on the water surface.

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever

real, smaller and upside-down.   so the answer should be b.

more than, less

less than, more

answerscientific theory;