An electron is a negatively charged particle that has a charge of magnitude, e - 1.60 x 10-19 c. which one of the following statements best describes the electric field at a distance r from the electron? the electric field is directed toward the electron and has a magnitude of ke/r. the electric field is directed away from the electron and has a magnitude of ke/2. the electric field is directed toward the electron and has a magnitude of ke/? the electric field is directed toward the electron and has a magnitude of ke? /r. the electric field is directed away from the electron and has a magnitude of ke/r.

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Diamond will scratch quartz. true or false

1.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the mass defect of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 2.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 3.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy per nucleon of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev