The graph below shows the number of sunspots observed between 1750 and 2000. The graph shows sunspot number on the y axis and years 1750, 1800, 1850, 1900, 1950, and 2000 on the x axis. The graph rises and falls in a cyclic order in gaps of approximately 10 years. The number of sunspots observed in 1750 was 90 and the number of sunspots in 1800 was 10. The number of sunspots observed in 1850 was 130 and the number of sunspots in 1900 was 15. The number of sunspots observed in 1950 was 150.

Based on the graph, which of these periods most likely witnessed the highest average amount of solar radiation??

1750 to 1800
1800 to 1850
1850 to 1900
1950 to 2000

There is a theory that indicates that dinosaurs became extinct when about 65 million years ago, a large asteroid hit the earth surface. dust caused by this collision blocked the sunlight reaching the earth's surface and many forms of life became extinct due to the cold. fearing this threat, how large the radius of an asteroid should you be looking for if the dangerous asteroid size is approximately the same as the one that killed the dinosaurs? available data suggests that about 18% of that asteroid's mass ended up as a dust spread evenly over earth after eventually settling out of the upper atmosphere. about 0.0180 g/cm^2 of dust, which is chemically different than the earth's rock, covered the earth's surface. typical asteroids have a density of about 1.9 g/cm^3. now that we know the size of the asteroid, how much energy was released during impact, assuming all of it was just the kinetic energy of the asteroid right before the impact?

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above