Q. Diagram shows a sound wave as being displayed on an oscilloscope screen. Draw the waveform of another sound wave on the same diagram which has twice the pitch and is half as loud.

The plum pudding model of the atom states that ?

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.

This is the number of complete movements of a wave per second.