<h2>The option ( c ) is correct</h2>
Explanation:
When we apply the force on any body , the inertia comes into play . It is the tenancy of the the body to oppose the force which tends to change its state .
In first case the train tries to change its state from rest to motion . Thus the inertia of rest opposes this tendency.
In the second case , the train tries to come from motion to the state of rest . Thus again , inertia opposes it .
Therefore inertia is the factor which creates difficulty in both case . Hence option ( c ) is correct
First, let us revise the Law of Conservation of Mass. It states that the total mass in an isolated system remains constant.
The results obtained are not in accordance with this law, because the total mass before the reaction was 75 grams and after the reaction was 73 grams. This seems that there was some mass lost.
This discrepancy is due to the fact that a gas was produced due to the reaction, namely carbon dioxide, and was lost from the beaker into the surroundings.
In order to get results in accordance to the law of conservation of mass, we may simply isolate the system (beaker and reaction mixture) from the surroundings further by putting a cork or some other instrument to seal the beaker.<span />
Both of them are substances which comes between the path of electricity but the difference is that one let the electricity to pass that is conductor and other acts as breaker in the connection which is a insulator.
This is false. The reaction force can be determined.
