Use Planck’s function to compute the ratio of blackbody emission at 6000 K (Sun) to that at 300 K (Earth), for a wavelength of 12 µm; Calculate the upward flux of reflected solar radiation at 12 µm, assuming an overhead sun with an solid angle Dw = 6.8x10-5 sr and an earth surface (flux) reflectivity rl = 0.1; Compare the ratio of the reflected solar flux to the Earth’s surface emission with the earlier ratio to explain whether solar and terrestrial radiation transfer can be treated separately.

Consider a population of snowshoe hares in montana. their fur color changes in response to changes in day length. during the long summer days, they have brown fur, but as the days shorten in the fall, their fur turns white in preparation for winter. then as the days get longer in the spring, their fur turns brown again. their fur coloration acts as camouflage from predators. as climate change brings warmer fall temperatures to montana, colder temperatures with snowfall are coming later in the year, and there may be less snowfall overall. as a result, the hares' fur color may be mismatched to the color of their surroundings, making them more visible to predators. which snowshoe hares would have a reproductive advantage in this changing environment? which snowshoe hares would have a reproductive advantage in this changing environment? hares that change color in response to day length, as the current population does hares with a mutation that prevents them from changing color from brown to white hares with a mutation that causes them to change color in response to temperature rather than day length hares with a mutation that prevents them from changing color from white to brown

Which of the following statements is true? a. there is not enough food produced in the world to feed everyone. b. the biggest cause of hunger and malnutrition is the cost of getting food to people who need it most. c. most countries have enough arable land and resources to feed their own population and export a surplus d. malnourishment is only seen in a few countries with very limited food supplies.

What part did glaciers play in forming the great lakes?