Answer:
It requires evidence or proof and to avail something is true.
Explanation:
Since energy can neither be created nor destroyed and it just changes from one form to another...so...
A.
Energy is neither lost nor gained as electrical energy is transformed into the energy of sound.
The answer is B. On a sunny day, the air over a lake will be cooler than the air over the bordering land.
<u><em>Developed countries will see a decrease in natural resources, because their population will decrease.</em></u>
Answer:
mass of ball 1=m1
mass of ball 2=m2
velocity of ball=r1w1
velocity of ball 2=r2w2
Total angular momentum=m1*v1+m2*v2
but
v1=r1*w1
v2=r2*w2
Substitute values in above equation
Total angular momentum of the system=m1*r1*w1+m2*r2*w2
