In concave lenses a Distance object appears ​

Frequency of electromagnetic waves that a radio station is assigned. what do you call this type of wave?

The standard cell potential (e°cell) for the reaction below is +0.63 v. the cell potential for this reaction is when the concentration of zn2+ = 1.0 m and the concentration of pb2+ = 2.0 x 10-4 m. pb2+(aq) + zn(s) > zn2+(aq) + pb(s)

Planets in our solar system do not revolve around the sun in perfect circles. their orbits are nore like ovals. which term do scientists use to describe these orbits