A student placed a black piece of construction paper in the sunlight. She placed a thermometer under the paper and measured the temperature every 10 minutes for 50 minutes. The graph below shows her results. Which of the following best explains her results?

A. Many wavelengths of electromagnetic radiation are transmitted by the paper and are converted to ultraviolet radiation.

B. Many wavelengths of electromagnetic radiation are reflected by the paper and are converted to infrared radiation.

C. Many wavelengths of electromagnetic radiation are absorbed by the paper and are converted to infrared radiation.

D. Many wavelengths of electromagnetic radiation are refracted by the paper and are converted to ultraviolet radiation.

Hot air balloons float in the air because of the difference in density between cold and hot air. in this problem, you will estimate the minimum temperature the gas inside the balloon needs to be, for it to take off. to do this, use the following variables and make these assumptions: the combined weight of the pilot basket together with that of the balloon fabric and other equipment is w. the volume of the hot air inside the balloon when it is inflated is v. the absolute temperature of the hot air at the bottom of the balloon is th (where th> tc). the absolute temperature of the cold air outside the balloon is tc and its density is ďc. the balloon is open at the bottom, so that the pressure inside and outside the balloon is the same. as always, treat air as an ideal gas. use g for the magnitude of the acceleration due to gravity.

What is a metal replacement reaction

Which characteristics can be used to differentiate star systems? check all that apply.