Answer:
apparent position = 26.6 cm
and size is same of coin because we observe it directly above of the coin
Explanation:
given data
diameter = 2 cm
depth = 20 cm
refractive index of water = 1.33
to find out
apparent position and size
solution
we know refractive index of air is 1
so apparent position of coin formula is
apparent position = ..........................1
put here value in equation 1
apparent position =
apparent position = 26.6 cm
and size is same of coin because we observe it directly above of the coin
Answer:
0.49
0.51
Explanation:
Probability that bulb is defective :
Let :
b1 = box 1 ; b2 = box 2 ; b3 = box 3
d = defective
P(defective bulb) = (p(b1) * (d|b1)) + (p(b2) * p(d|b2)) + (p(b3) * p(d|b3))
P(defective bulb) = (1/3 * 10/20) + (1/3 * 7/15) + (1/3 * 5/10))
P(defective bulb) = 10/60 + 7/45 + 5/30
P(defective bulb) = 1/6 + 7/45 + 1/6 = 0.4888
= 0.49
P(bulb is good) = 1 - P(defective bulb) = 1 - 0.49 = 0.51