How do you perform a side spin serve in table tennis

The sidespin serves are going to drag the ball around to the left or right but it will probably curve in a more standard and natural way. Whereas the corkscrew spin is going to bounce on the other side of the table then really kick off to the right or the left. You should be able to do this serve with your forehand or your backhand.

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made

the answer the third choice the letter c