Antiseptic solution used to wash cuts and wounds in the body have surface tension lower than water. What is its advantages ?

Define surface tension. What are its units ?

Define Surface tension. Write its formula. What is its S.I unit?

A body having density more than 1 g cm^(-3) sinks in water.

Statement-1: It is better to wash the clothes in cold soap solution. Statement-2: The surface tension of cold solution is more than the surface tension of hot solution:

Assertion : If earth did not have atmosphere, its average surface temperature would be lower than what it is now Reason : Green house effect of the atmosphere would be absent, if earth did not have atomosphere.

A narrow capillary tube is dipped 10 cm below water surface and a liquid bubble of radius 2 mm formed at the lower end by blowing air through the tube. a. Calculate the excess pressure due to surface tension. b. What is the pressure required in the tube in order to blow a hemispherical bubble at its end in water? The surface tension of water at temperature of the experiment is 7.30xx10^(-2) N//m . 1 atmospheric pressure = 10^(5) Pa , density of water = 1000 kg//m^(3)

Answer the following : (a) Name the em waves which are suitable for radar system used in aircraft navigation. Write the range of frequencey of these waves. (b) If the earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain

The lower end of a capillary tube of diameter 2.0 mm is dipped 8.00cm below the surface of water in a beaker. What is the pressure required in the tube in order to blow a hemispherical bubble at its end in water? The surface tension of water at temperature of the experiments is 7.30 xx 10^(-2) Nm^(-1) . 1 atmospheric pressure = 1.01 xx 10^(5) Pa , density of water = 1000 kg//m^(3), g=9.80 ms^(-2) . also calculate the excess pressure.

Air is pushed into a soap bubble of radius r to double its radius. If the surface tension of the soap solution is S, the work done in the process is

A cube of side a and mass on just floats on the surface of water as shown in the figure. The surface tension and density of water are T and rho_(w) respectively. If angle of contact between cube and water surface is zero, find the distance h (in metres) between the lower face of cube and surface of the water. (Take m=1kg, g=10ms^(-12), aT=10/4 unit and rho_(w)a^(2)g=10 unit)