A solution is made from 25 ml of ethanol and 75 ml of water. Calculate the volume percentage.

A solution is made from 25 ml of ethanol and 75 ml of water. Calculate

1.	A solution is made from 25 ml of ethanol and 75 ml of water. Calculate the volume percentage.
Answer» Solution :(a) (i) To measure the speed of an automobile • A source emitting electromagnetic wave is attached to a police car • The wave is reflected by a moving source. • From the frequency shift, the over SPEEDING vehicles can be determined. (ii) Tracking a satellite • The frequency of radio waves decreases as the satellite passes away from the EARTH. • By this CHANGE in frequency, the location of the satellites is determined. (iii) RADAR • The radio waves are detected by the receivers. • The frequency change tracks the speed and location of the aircrafts. (IV) SOLAR • There is a frequency change between the sent signal and received signal. • This helps to determine the speed of submariners and marine animals. (b) Volume of ethanol= 25 ml Volume of water = 75 ml `"Volume percentage"=("Volume of the solute")/("Volume of the solution")XX100` =`(25)/(25+75)xx100=(25)/(100)xx100=25%`