Drops of water are seen on the outer surface of a vessel containing chilled water. Give reason.

Surface water contains.

Rusting of iron is quicker in saline water than in ordinary water. Give reason.

Give reasons : Water droplets can be seen outside a chilled water bottle.

A farmer observed drops of water along the margins of leaves of tomato plants growing in his well irrigated field on a winter morning. Give reasons for this occurrence. Why the water drops appeared only along the leaf margins?

Thermos bottle or Dewer flask consists of a double walled glass vessel with inner and outer walls coated with silver. Give reason.

An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into the water. Explain the reason.

If water is ejecting from a hole of radius r at a depth h from the water surface in cylindrical vessel of diameter D, then speed with which the water level in the vessel drops .(Consider area of hole is comparable to area of vessel)

An ice cube containing a galss ball is floating on the surface of water contained in a trough. The whole of the ice melts, the level of water in the trough

Water is running into a conical vessel, 15cm deep and 5cm in radius, at the rate of 0.1 c m^3//s e c . When the water is 6cm deep, find at what rate is the water level rising? the water-surface area increasing? the wetted surface of the vessel increasing?

Water is running into a conical vessel, 15cm deep and 5cm in radius, at the rate of 0.1 c m^3//s e c . When the water is 6cm deep, find at what rate it. the water level rising? the water-surface area increasing? the wetted surface of the vessel increasing?