Ionic bonding happens when one atom gives one or more electron and the other atom receive them. in covalent compounds a
at least two electrons have to be given
b
only one electron can be received
c
atoms share electrons instead of exchanging
d
non of the above is true

Explain the doppler effect in terms of frequency, wavelength, and speed.

Aplane takes off from an airport and flies to town a, located d1 = 215 km from the airport in the direction 20.0° north of east. the plane then flies to town b, located d2 = 230 km at 30.0° west of north from town a. use graphical methods to determine the distance and direction from town b to the airport. (enter the distance in km and the direction in degrees south of west.)

Which type of wave can travel without a medium