Physics It is easier to roll a barrel full of coal tar than to pull it because 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 full weight of the barrel comes into play when it is pulled the rolling friction is much less than the sliding friction 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 full weight of the barrel comes into play when it is pulled the rolling friction is much less than the sliding friction ANSWER DOWNLOAD EXAMIANS APP
Physics Necessary element of change in solar energy to electrical energy Pure Copper Berillium Silicon Tantelum Pure Copper Berillium Silicon Tantelum ANSWER DOWNLOAD EXAMIANS APP
Physics Which law is also called law of inertia ? Newton first law All of above Newton second law Newton third law Newton first law All of above Newton second law Newton third law ANSWER DOWNLOAD EXAMIANS APP
Physics Sound is heard over longer distances on rainy days because Moist air does not absorb sound Sound travels slowly in moist air Moist air absorbs sound Sound travels faster in moist air Moist air does not absorb sound Sound travels slowly in moist air Moist air absorbs sound Sound travels faster in moist air ANSWER DOWNLOAD EXAMIANS APP
Physics In case of uniform circular motion, the acceleration is Variable in magnitude but constant in direction Constant in magnitude and directed radially inwards Zero Variable in magnitude but tangential to the circle Variable in magnitude but constant in direction Constant in magnitude and directed radially inwards Zero Variable in magnitude but tangential to the circle ANSWER DOWNLOAD EXAMIANS APP
Physics The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be: 4 T 1 T 2 T 8 T 4 T 1 T 2 T 8 T ANSWER DOWNLOAD EXAMIANS APP