Answer:
B
Explanation:
It seems to be childlike but with intention.
Answer:
b
Explanation:
Further testing proved conclusively that the cowpox virus was able to build immunity against smallpox. Using his theory, similar vaccines were later created for diseases such as yellow fever, mumps, rubella and tetanus.
A person who studies word origins and meanings would most likely
be an etymologist. Hence the profession he is specializing from is called
etymology. Etymology in definition is called a scientific study of words, its
history, origin, morphology, structure and meaning. Words although, change
through the course of time and by which society uses a certain phrase, word or
mantra. Hence, etymology also studies that. It may also mean that word meanings
can change because of the ascribed and due to certain occasions.
Answer:
MA of lever is 3 means that the applied force can lift 3 times heavier load using that machine.
VR of a lever is 4 means the effort has to move 4 times more distance than that of load distance to lift any load up to certain height.
efficiency of 60% means that 40% of energy is wested due to friction, heat energy.