Answer:
17.4 cm
Explanation:
Power of lens = +1.75 diopters
Focal length of lens

This is a convex lens as focal the diopter given is positive which makes the focal length positive. Image distance will be negative.
v = -25

∴ The new near point is 17.4 cm
Answer:
0.5504
Explanation:
We can use Bay's theorem to solve this question
P( No physics career/fail) = P(No Physics career and fail)/P(Fail)
= P( Fail/ No physics career)×P( no physics career)/P( fail)
=
=0.5504
I think it's 45 miles. Don't know for sure though
U need an insulator to prevent the shock passing through , that's why there is a plastic sheet covering the copper wires so that it can prevent the electricity passing through as plastic is an insulator and does not conduct electricity