||A drop of water is spherical in shape. This is due to –
||Oil spreads on the water surface because –
||Surface tension of oil is less than water
||Kerosene oil floats on water because –
||Its density is greater than the density of water.
||Pressure inside a soap bubble is –
||More than atmospheric pressure
||If two bubbles of soap of different diameters come in contact with a tube, then what will happen?
||The smaller bubble will become smaller and bigger will become bigger
||A hydrogen-inflated polyethylene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will –
||Increase in size
||What happens when some charge is placed on a soap bubble?
||Its radius increases
||Kerosene rising in the wick of the stove is due to –
||In a capillary tube a fluid rises more as compared to water, this is due to the –
||Surface tension of fluid is more than that of water
||When an air bubble at the bottom of the lake rises to the top, it will –
||Increased in size
||While traveling by plane, the ink of the pen starts to come out –
||Due to a decrease in air pressure
||In automobiles hydraulic brakes work on –
||A sudden fall in barometer reading indicates that the weather will be –
||With the rise in temperature, the viscosity of liquid –
||The highest viscosity among the following is –
||Fish can survive in a frozen lake because –
||Water near the bottom does not freeze
||Increasing the amount of a substance does not change its –
||The density of water will reach its maximum value at the temperature of –
||The maximum density of water is at –
||Why does an iron nail float on mercury while it sinks in water?
||Iron has greater density than water and less than mercury.
||A needle sinks in water whereas a ship made of iron floats on it because –
The relative density of the needle is greater than that of water displaced by it
||While lifting a bucket of water from a well, we feel that the bucket –
||Becomes heavier above the surface of water
||200 gm of water is filled in a weightless balloon. Its weight in water will be –
||The clouds float in the atmosphere because of their low –
||While floating in a sea what part of an iceberg is above the surface of the sea?
||An ice cube is floating in a glass of water. What happens to the water level when the ice melts? It –
||Remains the same
||A body floats at 4°C water. If the temperature reaches 100°C then –
||The body will sink
||Why it is easier to swim in the sea than in a river?
||The sea water is salty
||When a ship enters the sea from a river, what happens?
||It rises a little