Michiko walked a distance of 1.60km in 30min. Find her average speed in m/s

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

The basic types of tissue in the human body are

Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?