The earth's worst mass extinction was:
late devonian
ordovician-silurian
pe...
Physics, 03.02.2020 00:52, kaywendel2008
The earth's worst mass extinction was:
late devonian
ordovician-silurian
permian-triassic
end triassic
cretaceous-tertiary
Answers: 3
Physics, 21.06.2019 23:50, BrainzOli7408
Any color picture tube and electric field exerts a net force of magnitude 1.68x 10^-13 n on an electron the rest mass of an electron is 9.11 x 10^-13 what is the electron acceleration?
Answers: 3
Physics, 22.06.2019 22:50, cbogrett
Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?
Answers: 1
Mathematics, 25.08.2019 07:00
Mathematics, 25.08.2019 07:00
English, 25.08.2019 07:00
Mathematics, 25.08.2019 07:00
Social Studies, 25.08.2019 07:00
Social Studies, 25.08.2019 07:00