Physics It is easier to roll a barrel full of coal tar than to pull it because 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 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 ANSWER DOWNLOAD EXAMIANS APP
Physics Suppose voltage V is applied across a resistance R. The power dissipated in the resistance is P. Now the same voltage V is applied across a parallel combination of three equal resistors each of resistance R. Then the power dissipated in the second case will be P P/3 3P 2p/ 3 P P/3 3P 2p/ 3 ANSWER DOWNLOAD EXAMIANS APP
Physics In heating frozen foods in sealed pouches in a microwaves, why do you first poke holes in the pouch? To prevent the steam pressure from bursting open the pouch To allow the aroma of the food to come out through the holes To allow the microwaves to get into the food through the holes To allow the heat to get into the food through the hole To prevent the steam pressure from bursting open the pouch To allow the aroma of the food to come out through the holes To allow the microwaves to get into the food through the holes To allow the heat to get into the food through the hole ANSWER DOWNLOAD EXAMIANS APP
Physics A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will First rise and then fall Fall Rise Remain the same First rise and then fall Fall Rise Remain the same ANSWER DOWNLOAD EXAMIANS APP
Physics Waves that are required for long distance wireless communication are Microwaves Infrared rays Radio waves Ultraviolet rays Microwaves Infrared rays Radio waves Ultraviolet rays ANSWER DOWNLOAD EXAMIANS APP
Physics A bullet is fired from a rifle which recoils after firing. The ratio of kinetic energy of the rifle to that of the bullet is More than one Zero Less than one One More than one Zero Less than one One ANSWER DOWNLOAD EXAMIANS APP
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