Answer: temperature of the hot reservoir is 303.52K
Explanation:
Th=temperagture of hot reservoir
Tc=temperature of cold reservoir 263K
Eff=efficiency of the refrigerator
Cop=coefficient of performance
7
Eff=1/cop
Eff=1/7
Eff=0.142
Eff=1-263/th
0.142-1=-263/th
-0.858=-263/th
Th=303.52K
Answer:
true
Explanation:
i know this im in 6th grade
The answer is probably going to be b or d. hope that helped
Answer:
The magnitude of the magnetic field at the point of interest is B=1.8·10^-3T
Explanation:
To solve this problem we can calculate the expression of the magnetic field for one of the coils and using the symmetry of the problem we can use twice this expression to obtain the expression of the total field as:

For the magnetic field
we use the Biot-Savart law:

Using cylindrical coordinates, the expression of the magnetic field in a circular coil is:

The expression of the magnetic field in a circular coil with N turns is:

Because we have a point of symmetry in the middle between the 2 coils, the expression of the field in that point is:

with r=0.5m, Z=0.25m, i=10A and N=100
1-d 2-a. This is not my field of expertise but this is my assumption