Answer:
a) 3.210J/K
b) -3.073J/K
c) -3.131J/K
d) O
Explanation:
The relationship between entropy and the energy transferred is applied.
Mathematically, dS = dQ/T
the steps are as shown in the attachment.
Answer:
1.7 × 10^11 Pa
Explanation:
Please see the attachments below
Answer:
In-car temperature is controlled in a variable displacement compressor system by varying the capacity of the <em>refrigeration</em> not by cycling the <em>compressor </em>on and off.
Explanation:
A Variable Displacement Compressor (VDC) works in a separate and rather more efficient manner than the fixed displacement compressor (FDC). <em>The VDC automatically regulates the cooling effect of the refrigerator by changing its pumping capacity by means of a "wobbling piston" system. </em>
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During times of peak load, the refrigeration pumping capacity is increased, delivering a large flow rate of refrigerant, thus giving a high refrigerating effect. The reverse happens during times of load refrigeration load.
<em>The fixed compressor tries to vary the temperature of the car by simply switching off the compressor</em>, and turning it on during times of low and peak loads.
The question is how far not how for
Answer:
101.1 m
Explanation:
From the kinematics equations
s=ut-0.5gt^{2} but since u=o and the negative implies the distance is downwards then
s=0.5gt^{2} where s is the distance, u is initial speed, t is time, g is acceleration due to gravity
s=0.5*9.81*4.54^{2}=101.099898
\approx 101.1 m
Earth moves fastest in its orbit when it is nearest to the sun.