The elements selenium and oxygen are both poor electrical conductors. In which section of the periodic table are they
1 answer:
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Answer:
Force on superball will be
Explanation:
We have given mass of superball m = 52 gram = 0.052 kg
Velocity change from 20 m/sec downward to 14 m/sec upward
Let downward velocity is positive then upward velocity is negative
So downward velocity is + 20 m/sec and upward velocity is -14 m/sec
Time is given as 1800 sec
We know that acceleration is rate of change of velocity
So
According to newton second law
Force = ma = 0.052×0.0188