What is the amount of heat needed to raise the temperature of 1kg of that substance by 1 degree Celsius?

A. Internal combustion
B. Thermal pollution

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.

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Which position represents spring in the southern hemisphere? a) b) c) d)