4. The loudness of the sound depends on the energy. More energy gives a louder sound. We call the loudness , which is measured in .

the loudness of sound is called the sound wave or the volume..and it is measured in devibels(dB)

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.