true cause cold slows down the movement of moluclues making it change state
The half-life of radium-226 is 1600 years. How many grams of a 0.25 g sample will remain after 4800 years?
this would be 0.03125 gram
Answer:
(A) 800 K (B) 2.4 KW
Explanation:
We have given the COP =1.6
The sink temperature 
We have to find the source temperature, that is 
(A) We know that COP of the heat pump is given by 
So 



(B) We have given the work done =1.5 KW
The rate of heat transfer is given by 
<span>Mass number is the number of protons and neutrons in an atom, and it tells us about the mass of the atom in amu, or atomic mass units. Atomic mass is the average mass of all the isotopes of a certain type.</span>
<span>Mass number found on the periodic table</span>
Answer:
<h2>
<u>W</u><u>ater</u> covers 70 percent of earth's surface.</h2>