Which group of stars has a luminosity of 10², is located in spectral class K and has a surface temperature of approximately 2900ºK? A. Main Sequence
B. White Dwarfs
C. Super Giants
D. Giants

Did the universe cool off or get hotter as it expanded after the 'big bang"?

What should you adjust to make your hard hat fit properly

An ecosystem is shown in the illustration. assume that human activities have led to a decrease in the number of eagles. a virus attack on rabbits has led to a decrease in their population in the ecosystem. which two sentences describe likely effects on the ecosystem? 1. there’s an increase in the number of snakes and insects and a decrease in the number of frogs. 2. there’s an increase in the number of snakes and insects, and the storks face increased competition for food. 3. there’s an increase in the number of storks and a decrease in the number of snakes and insects. 4. there’s an increase in the number of frogs and a decrease in the number of storks and insects. 5. there’s a decrease in the number of snakes, insects, and frogs.