Consider the situation when almost all of the magnetic moments of a sample of a particular ferromagnetic metal are aligned. in this case, the magnetic field can be calculated as the permeability constant μ0 multiplied by the magnetic moment per unit volume. in a sample of iron, for example, where the number density of atoms is approximately 8.50 ✕ 1028 atoms/m3, the magnetic field can reach 1.99 t. if each electron contributes a magnetic moment of 9.27 ✕ 10−24 a · m2 (1 bohr magneton), how many electrons per atom contribute to the saturated field of iron?

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?

How have the competing explanations' experiments on atoms affected the development of the atomic model?

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.