The answer is allowed people to store food for a few days in homes.
Answer:
The lens is a concave lens
Explanation:
In concave lens, the image formed is erect. diminished and virtual. The more the distance of the object from the mirror, the more diminished the image formed will be. Concave lens are used in binoculars and telescopes and are installed before or in the eye piece to enable a clear focus.
Answer:
Because closing the switch completes the circuit.
Explanation:
Answer:
Explanation:
Given
maximum height=0.380 m
initial velocity=



The time of flight will be 
time to reach top +time to reach bottom will be same

t=0.556 s
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