Answer:
I think A is the right answer
Explanation:
Velocity deals with distance traveled in in a specified direction
Apart from the first option, there is no specific direction given in any of the other options
Answer:
See the explanation.
Explanation:
The speeds of sound depend upon the temperature of the medium. As the temperature increased in the afternoon, the speed of sound increases. Then the time taken by reflected sound will be less than 0.1 sec in the afternoon. And to hear an echo the time gap between an original sound and reflected sound must be at least 0.1 sec. That is why the student could not hear the echo at all in the afternoon.
Answer:
the shortest path between two points is displacement..
Explanation:
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