200mg of uranium-238 has a half life of 4.5 billion years

How much will be left after 13.5 billion years

A: 200mg
B: 100mg
C: 50mg
D:25mg

snell's law

refractve index = sin incidence / sin refraction

answerdmitry mendeleyev made a workable classification of the elements

the answer should be in the picture.

96.77 amp

explanation:

rl = 250/100 = 2.5 ohms.

egl = 250 + (100 × 0.1) + 2 = 262 v.

at 700 r.p.m., eg2 = 262 × 700/1000 = 183.4 v.

if ia is the new current, then eg2 - 2 - (ia × 0.1) = 2.5 ia

which means this will give ia = 96.77 amp.