Answer:
The correct answer is explained below:
Explanation:
- Flooding and intrusion of salt water in the low lying areas can adversely affect human life. This can happen in the following ways:
- Flooding can cause many people to die due to drowning in the flood water.
- Many people lose their habitat and all their belongings due to the entry of water into the settlements having only the ground floors. These people need to rehabilitated to safer regions.
- The saline water percolates through the ground and mixes with the fresh water present in the water table, thereby making them saline and non-consumable.
- People have to face the dearth of food, drinking water, clothes and electricity until rescue operations are sent.
- Increased chance of transmission of water-communicable or water-borne diseases like diarrhoea.
Answer:
All objects that have balanced forces acting on them must be stationary is an example of Newton's first law of motion.
Explanation:
- Newton's First law of motion is the Law of inertia, that states a body continues to be in state opf rest or state of motion untill an unbalanced force acts on it.
- So if a body has all balanced forces acting on it then it will continue to remain in state of rest i.e. it will be stationary.
- The first example describes Newton's third law, that every action has equal and opposite reaction.
- The second and third example supports Newton's Second Law, the law of momentum which states that the rate of change oif momentum is directly proportional to the force applied on the body and the mass of the body.
The correct option is B.
For a mature woman, each month the increased level of estrogen hormone leads the pituitary gland to secrete luteinizing hormone. Once this hormone is secreted, the ovary releases a single egg which moves down to the lining of the uterus. If fertilization does not occur, the egg is shed together with the lining of the uterus in a monthly process called mensuration. If fertilization occur, then the fertilized egg attach to the lining of the uterus and placenta is formed. The fertilized egg then send signal to the ovary to keep secreting progesterone, which will sustaining the pregnancy by keeping the uterus lining thick and nourishing for the developing embryo.
