What evidence for the transformation of energy does the running fan produce? select all that apply. light is produced. the fan warms up. sparks can be seen. the blades of the fan are spinning. an air flow is felt.

What could explain what happened when the time was equal to 120 minutes

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z