Suppose a baseball player steps to the plate with the intention of trying to "coax" a base on balls by never swinging at a pitch. the umpire, of course, will necessarily call each pitch either a ball (b) or a strike (s). what outcomes make up the event a, that a batter walks on the sixth pitch? (note: a batter "walks" if the fourth ball is called before the third strike.) larsen, richard j.; marx, morris l.. an introduction to mathematical statistics and its applications (page 19). pearson education. kindle edition.

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?

Which notation is used to represent an alpha particle? a. b. c. d.

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather