True or False: Write True if the statement is correct and False, if not.
1. Most of our intertidal zones and estuaries are already under threat.
2. The use of synthetic fertilizers are encouraged.
3. Septic tanks should be pumped at least every 5 years.
4. Excessive use of toxic pesticides can pollute nearby waterways.
5. Canoe and kayak are advisable to be used if you want to snorkel near the
coral reefs.
6. The protection and conservation of the environment, not just the
estuaries, lies in the hands of the people.
7. Excessive use of toxic pesticides can bring about bad effects to our
estuaries and intertidal zones.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied

the answer your looking for is c).