Answer:
the high temperature needed to operate this refrigerator is C) 137.4° C
Explanation:
Hello!
The carnot refrigeration cycle is one in which a machine absorbs heat from an enclosure and expels it to the surroundings, the equation that defines the COP performance coefficient for this cycle is:

COP=performance coefficient =2.1
T1= Low temperature
T2=high temperature
Now use algebra to find the high temperature

If we replace the values:
note = remember that the temperature must be in absolute units, for which we must add 273.15 to the low temperature to find the temperature in Kelvin
T1 = 5 + 273.15 = 278.15K

In celsius
T2=410.60-273.15=137.4° C
the high temperature needed to operate this refrigerator is C) 137.4° C
Answer:
The metals create an electron cloud that makes a metal have a magnetic field
Explanation:
<h2>The atomic mass of silicon is 28.0855</h2>
Answer:
The prokaryotic cells are smaller than the eukaryotic cells.
Explanation:
Its just the simple process of elimination. Prokaryotic cells lack of a lot of things, including mitochondria, so it couldn't be option C. BOTH prokaryotic and eukaryotic cells have cytosol AND ribosomes, so the answer couldn't be D or A, and you're left with option B. Meaning option B is the correct choice.
Answer:
The angular separation is 
Explanation:
From the question we are told that
The wavelength of the light is 
The distance of separation between the slit is 
The distance from the screen is
Generally the condition for constructive interference is mathematically represented as

=> ![\theta = sin ^{-1} [ \frac{n * \lambda }{ d } ]](https://tex.z-dn.net/?f=%5Ctheta%20%3D%20%20sin%20%5E%7B-1%7D%20%5B%20%5Cfrac%7Bn%20%2A%20%20%5Clambda%20%7D%7B%20d%20%7D%20%5D)
here
is the angular separation between the central maxima and one side of the first order maxima
given that we are considering the first order of maxima n = 1
=> ![\theta = sin ^{-1} [ \frac{1 * 600*10^{-9} }{ 2.0 } ]](https://tex.z-dn.net/?f=%5Ctheta%20%3D%20%20sin%20%5E%7B-1%7D%20%5B%20%5Cfrac%7B1%20%20%2A%20%20600%2A10%5E%7B-9%7D%20%7D%7B%20%202.0%20%7D%20%5D)
=> ![\theta = sin ^{-1} [ 0.0075 ]](https://tex.z-dn.net/?f=%5Ctheta%20%3D%20%20sin%20%5E%7B-1%7D%20%5B%200.0075%20%5D)
=> 
So the angular separation of the two first order maxima is


