Why does a greased razor blade float on the surface of water ?

A needle or a pin floats on the surface of water because of

A light open rigid wire frame floats on the surface of water as shown in figure. What force will act on the frame , immediately after some soap solution is droipped inside it ? [ alpha_1 and alpha_2 are the surface tension tensions of water and soap respectively ( alpha_1gtalpha_2 )]

The material of wire has specific gravity 8. It is not wetted by water, what is the maximum diameter of the wire that will float on the surfacve of water?

The length of needle floating on the surface of water is 1.5 cm.The force in addition to its weight required to lift the needle from water surface will be (Surface tension of water = 7.5 N//cm)

A disc of paper of radius R is floating on the surface of water of surface tension T . If r=20 cm and T=0.070N//m , then the force of surface tension on the disc is

Take a piece of thin aluminium sheet and dip it in water in a bucket . What do you observe ? Now shape the same piece of aluminium into a small boat and place it on the surface of water . It floats , isn't it ?

Vinaya while playing in garden observed a pond with a green coloured covering which was floating on the surface of water? Next day she asked her teacher about the same. What her teacher must have told her?

A ring of radius 0.75 cm is floating on the surface of water . If surface tension of water is 0.07N//m , then the force required to lift the ring from the surface of water will be

A steel blade flaots on the surface of pure water, when detergent is added it sinks : why ?

A platinum wire ring of radius 2.5 cm floats horizontally on the surface of water. A vertical force of 0.022 N is required to detach the ring from the surface of water. Then surface tension of water is.