Which instrument is directly used to determine the relative masses of atoms?
(a) spectroscope
(b)geiger counter
(c)mass spectrograph
(d)microbalance
(e)electron microscope

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

Identify a specific example for each type of technology

Gymnast always perform on padded mats. how does the mats protect the gymnast