Answer: New vaccines are offered each year because the virus changes.
Explanation: The flue viral strain constantly changes its genetic make up, a process called antigenic drift. As the virus replicates there are small changes that creates new strains which evolve to a completely different influenza virus requiring a new type of vaccine each year.
The correct option is A.
When an end of a tuning fork that is vibrating is placed against a table, it produces a sounder that is dramatically louder than the original sound produced by the vibrating tuning fork. At this stage, the tuning fork is forcing the table to vibrate at its own frequency. Thus, the statement in option A is not true.
Answer:
No
Explanation:
Once sugar added to water tend to dissolve and their effect in volume of solution tend to be low so can be neglected
I believe that would be the mantle. Hope this helped!
The answer is 50%.
The-related number of thumps every moment of the heart when working at its greatest that is generally evaluated as 220 short one's age achieved 90 percent of his most extreme heart rate when tried on a treadmill.
It is prescribed that you practice inside 55 to 85 percent of your most extreme heart rate for no less than 20 to 30 minutes to get the best outcomes from oxygen consuming activity. The MHR (generally ascertained as 220 less your age) is the maximum furthest reaches of what your cardiovascular framework can deal with amid physical movement.
