This problem can be solved by using oxidation states. The oxidation state is based on the electrons an atom loses or gain, or appears to use when forming compounds.To find the formula for Copper (I) Sulfide, we have to first consider the individual ions that come together to form it. Copper (I) is an ion of copper that has a charge of +1, i.e 
. Sulfur is an element in group 6 of the periodic table. The sulfur ion has a charge of -2, i.e 
. To form Copper (I) Sulfide, which is electrically neutral, we need 2 Copper (I) ions and 1 sulfur ion.
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The reaction is represented by the equation below
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The correct answer is (C)
Answer:
Explanation:
As we know by energy conservation that change in gravitational potential energy of the system = change in kinetic energy of the two ball
So here we can say
Also since there is no external force on the system of two masses so here total momentum of the two balls will remains conserved
now we have
98.4% of the power turns into heat.
If the bulb consumes 55 watts,
then it "wastes"
(0.984) x (55w) = 54.12 watts
Speed = distance / time.
Speed of him leaving the nest:
S = 100 / 20sec
5 m/s.
Catching the snake:
S2 = 50 / 5sec
10 m/s.
Average of 5& 10 = 7.5
7.5 m/s has to be the answer.
