Physics It is easier to roll a barrel full of coal tar than to pull it because coal tar is a liquid and it flows in the barrel when it is rolled the rolling friction is much less than the sliding friction the full weight of the barrel comes into play when it is pulled more surface area of the barrel is in contact with the road when it is pulled coal tar is a liquid and it flows in the barrel when it is rolled the rolling friction is much less than the sliding friction the full weight of the barrel comes into play when it is pulled more surface area of the barrel is in contact with the road when it is pulled ANSWER DOWNLOAD EXAMIANS APP
Physics A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will Have its shape changed Decrease Increase Remain unaffected Have its shape changed Decrease Increase Remain unaffected ANSWER DOWNLOAD EXAMIANS APP
Physics Heat energy is transferred by conduction whenever molecules Collide each other Particles replaces there places Means of photons All of these Collide each other Particles replaces there places Means of photons All of these ANSWER DOWNLOAD EXAMIANS APP
Physics Conversion of heat into electrical energy is achieved by using : Ammeter Voltmeter Thermocouple Hydrometer Ammeter Voltmeter Thermocouple Hydrometer ANSWER DOWNLOAD EXAMIANS APP
Physics Burns caused by steam are much severe than those caused by boiling water because Steam is gas and engulfs the body quickly Steam pierces through the pores of body quickly Temperature of steam is higher Steam has latent heat Steam is gas and engulfs the body quickly Steam pierces through the pores of body quickly Temperature of steam is higher Steam has latent heat ANSWER DOWNLOAD EXAMIANS APP
Physics Which one of the following is not a feature of Indifference Curve? They are parallel to each other They do not intersect each other They are concave to each other They slope downwards to the right They are parallel to each other They do not intersect each other They are concave to each other They slope downwards to the right ANSWER DOWNLOAD EXAMIANS APP
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