SI will always be in metric, so the answer is D. Meter.
Answer:
a.
Explanation:
the electrons beams deflection radius will be halved.
Answer:


Explanation:
Height Of the watermelon when it is dropped is given as

time of fall under gravity

now if water melon start from rest then we have

acceleration due to gravity for watermelon

now we need to find the final speed of watermelon

so we will have

