A b c or d about the earth...
this is easy if u know

Hydrogen and helium are both members of?

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?