Question 3 (1 point) Consider the color of the Sun. Based on this color, use the chart below to determine

the sun's approximate surface temperature.

Star color

Blue stars

Temperature and Star Color

Approximate surface temperature (Kelvins)

30,000 - 60.000 K

10,000 - 30.000 K

7,500 - 10.000 K

6,000 - 7,500 K

Blue-white stars

White stars

5,000 -6,000 K

3,500 - 5.000 K

<3,500 K

Yellow-white stars

Yellow stars

Yellow-orange stars

Red stars

10,000 - 30,000

30.000 - 60,000

6000 - 7500

< 3500

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 does the mass of 0.7891 mol of ferric oxide (fe2o3)

Define a is a tiny pavket of energy