The spectrum of a blackbody has a peak wavelength of 2.80×10-7 meters. what is its temperature, in kelvins?

What is the northern most national park in the world

What is the amount of organic matter in all living organisms in a habitat called?

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks