16.In which phase is the substance at 20 °C and 0.75 atm? solid
liquid
vapor
all of the above

Aflashlight produces light using energy from the batteries. in which order does the energy change form? a. from chemical to electric to light energy b. from electric to light to chemical energy c. from electric to chemical to light energy d. from light to electric to chemical energy

In the african savanna, more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria