Complete Question
A certain refrigerator, operating between temperatures of -8.00°C and +23.2°C, can be approximated as a Carnot refrigerator.
What is the refrigerator's coefficient of performance? COP
(b) What If? What would be the coefficient of performance if the refrigerator (operating between the same temperatures) was instead used as a heat pump? COP
Answer:
a
b
Explanation:
From the question we are told that
The lower operation temperature of refrigerator is
The upper operation temperature of the refrigerator is
Generally the refrigerators coefficient of performance is mathematically represented as
=>
=>
Generally if a refrigerator (operating between the same temperatures) was instead used as a heat pump , the coefficient of performance is mathematically represented as
=>
=>
<em>A straight piece of wire with a current I flowing through it is placed in a magnetic field</em>
<em>A straight piece of wire with a current I flowing through it is placed in a magnetic fielduniform and perpendicular to the magnetic field lines. Magnetic force acting on the string</em>
<em>A straight piece of wire with a current I flowing through it is placed in a magnetic fielduniform and perpendicular to the magnetic field lines. Magnetic force acting on the stringthere is a way</em>
Lol I just learned this, here's the short answer:
Large doses of X-Rays are known to cause cell damage and
cancer, so
<span>X-Ray technicians have to stand behind the shield. Here's the lengthy answer:
</span>
This is because the patient would only be exposed to the small
dose of radiation once, which is hardly harmful. However, radiographers
deal with this all day every day, which could mean that the small doses
could add up. This is why they stand behind a lead screen; the small
exposure to the X-Rays aren't harmful alone but frequent exposure could
begin to damage your cells and lead to potential genetic mutation. If a
patient is often in radiography (a long-stay patient for example), they
begin to wear lead aprons whilst being X-rayed in order to prevent the
risk of harm. Hope I answered correctly.
Answer:
2Hz
Explanation:
this is a correct answer.
Radioactive "decay" means particles and stuff shoot OUT of a nucleus.
After that happens, there's less stuff in the nucleus than there was before.
So the new mass number is always less than the original mass number.