Question

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Answer 1

Answer:

The formula is 1/2mv^2

Explanation:

Velocity =Distance/time

Therefore v=60/1.8×10^4

=6×10^-2/18

=1/300m/s

As mass,m=1.67×10^-27kg

By substituting in the formula,

K.E=1/2×1.67×10^-27×1/300

=9.3×10^-17joules.

Answer 2

a is right ans

Explanation:

distance travelled by neutron in 1.8×10^-4 sec= 60m

speed of neutron(v)= 10^4/3 m/sex

k.e= 1/2 mv^2

1/2 × 1.67×10^-27×100/9×10^10

1.67×10^-17×50/9×1.67

K.E= 9.277×10^-17

=9.3 ×10^-17

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