Answer:
option A
Explanation:
given,
diameter of circle = 10 ft
refractive index of the water = n = 1.33
let the inclined surface of the cone makes an angle θ with vertical line then
we know,
from this θ = 48.75°
substitute this in eq ( 1 ) we have
h = 4.38
h = 4.4 (approx.)
Hence, the correct answer is option A
Answer:
C) either of these depending on speed
Explanation:
In classical mechanics, the momentum of a body is defined as the product of its mass and its velocity at a given time. Although the bullet has a smaller mass than the container ship, its momentum may be greater or lesser than container ship's, depending on its speed.
The thermal efficiency of a combustion system is simply
the ratio of heat out and heat in, that is:
efficiency = heat out / heat in
efficiency = 1030 J / 1540 J
efficiency = 0.669
<span>So the efficiency is 0.669</span>
The loss of matter is called the mass defect. The missing matter is converted into energy. You can actually calculate the amount of energy produced during a nuclear reaction with fairly simple equation developed by Albert Einstein; E = mc^2. In this equation, E is the amount of energy produced, m is the missing mass, or the mass defect, and c is the speed of light, which is a rather large number. The speed of light is squared, making that part of the equation a very large number that, even when multiplied by a small amount of mass, yields a large amount of energy.