the state or quality of being efficient.
"greater energy efficiency"
Answer
Efficiency is the ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result.
Answer:
The value is 
Explanation:
From the question we are told that
The efficiency of the carnot engine is 
The efficiency of a heat engine is 
The operating temperatures of the carnot engine is 
to 
The rate at which the heat engine absorbs energy is 
Generally the efficiency of the carnot engine is mathematically represented as
![\eta = [ 1 - \frac{T_1 }{T_2} ]](https://tex.z-dn.net/?f=%5Ceta%20%3D%20%20%5B%201%20-%20%5Cfrac%7BT_1%20%7D%7BT_2%7D%20%20%5D)
=> ![\eta = [ \frac{T_2 - T_1}{T_2} ]](https://tex.z-dn.net/?f=%5Ceta%20%3D%20%20%5B%20%5Cfrac%7BT_2%20-%20T_1%7D%7BT_2%7D%20%5D)
=> 
Generally the efficiency of the heat engine is
=> 
Generally the efficiency of the heat engine is also mathematically represented as
Here W is the work done which is mathematically represented as
Here 
is the heat exhausted
So
=> 
=>
The Answer Is D Because When Uu Magnify Large Items The Image Is Reflected Back To The Magnifying Glass Which Makes The Image Appear In The Back
Answer:
<h2>35</h2>
Explanation:
According to snell's law which states that the ratio of the sin of incidence (i) to the angle of refraction(n) is a constant for a given pair of media.
sini/sinr = n
n is the constant = refractive index
Since the diver shines light up to the surface of a flat glass-bottomed boat, the refractive index n = nw/ng
nw is the refractive index of water and ng is that of glass
sini/sinr = nw/ng
given i = 30°, nw = 1.33, ng = 1.5, r = angle the light leave the glass
On substitution;
sin 30/sinr = 1.33/1.5
1.5sin30 = 1.33sinr
sinr = 1.5sin30/1.33
sinr = 0.75/1.33
sinr = 0.5639
r = arcsin0.5639
r ≈35°
angle the light leave the glass is 35°
Answer:
D. It is easy to copy.
Explanation:
It is not B, or A, nor C.
