High above the surface of the earth, charged particles (such as electrons and protons) can become trapped in the earth's magnetic field in regions known as van allen belts. a typical electron in a van allen belt has an energy of 40 kev and travels in a roughly circular orbit with an average radius of 210 m. what is the magnitude of the earth's magnetic field where such an electron orbits?

What do scientists need to look at before developing an argument

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?