Halflife is the time taken by a radioactive substance by half its original mass. In this case the half life of the substance is 3 hours.
Therefore; New mass = Original mass × (1/2)^n where n is the number of half lives. In this case, the half life is 3 hours and therefore; the number of half lives in 6 hours will be two.
= if the original mass is 100%
new mass = 100 × (1/2)^2
= 100 × 1/4 = 25%
The remaining mass will be 1/4 of the original mass, meaning a fraction of 3/4 of the initial mass will have decayed.
Thus; the answer is 3/4
W(out)/w(in)
35,000J/50,00J=.7
.7 *100%=70 % efficient
It was dissolved in the water.
When the pressure is reduced, the water can't hold as much gas
in solution, so some of the gas comes out of solution.
If the pressure is allowed to drop too fast, then the gas comes out
of solution really fast, and some of the solution also jumps out of the
bottle, and you have to wipe it up before you pour any drinks from the bottle.
Answer:
656.09rad
Explanation:
We start from the equation of time based on the acceleration that says the following
We have this values practically,
Substituting,
Angular velocity is given by,
Answer: The correct option is A.
Move toward X but not rotate
Explanation:
This is because from the question, X is fixed and y is free to move. Since magnetic dipole of X is fixed, that is it can't move and that of y is free to move, therefore y will move toward x because it's forces of attraction is linear and not rotational and besides X and Y are on a linear path, therefore Y will move towards X that is fixed and it will not rotate since it's linear.
