Physics What is the principle of a ''Life Jacket"? It provides oxygen to a drowning person It decreases the volume of the person to keep him afloat The person can sit on it like a raft It increases the volume of the person to keep him afloat It provides oxygen to a drowning person It decreases the volume of the person to keep him afloat The person can sit on it like a raft It increases the volume of the person to keep him afloat ANSWER DOWNLOAD EXAMIANS APP
Physics A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that The metal ball suffers greater change in momentum The rubber ball suffers greater change in momentum Both suffer the same change in momentum The initial momentum of the rubber ball is greater than that of the metal ball The metal ball suffers greater change in momentum The rubber ball suffers greater change in momentum Both suffer the same change in momentum The initial momentum of the rubber ball is greater than that of the metal ball ANSWER DOWNLOAD EXAMIANS APP
Physics Planets do not twinkle because They are very far away from the earth resulting in decrease in intensity of light They are nearer to earth and hence we receive a greater amount of light. They emit light of a constant intensity Their distance from the earth does not change with time They are very far away from the earth resulting in decrease in intensity of light They are nearer to earth and hence we receive a greater amount of light. They emit light of a constant intensity Their distance from the earth does not change with time ANSWER DOWNLOAD EXAMIANS APP
Physics The colour of the ocean appears to be blue because the sunlight falling on it is Scattered Refracted Diffracted Reflected Scattered Refracted Diffracted Reflected ANSWER DOWNLOAD EXAMIANS APP
Physics A copper disc has a hole. If the disc is heated, the size of the hole Increases No change Decreases First increases and than decreases Increases No change Decreases First increases and than decreases ANSWER DOWNLOAD EXAMIANS APP
Physics Magnetic keepers are pieces of Nickel Soft iron Steel Cobalt Nickel Soft iron Steel Cobalt ANSWER DOWNLOAD EXAMIANS APP
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