Two radio antennas a and b radiate in phase. antenna b is a distance of 100 m to the right of antenna a. consider point q along the extension of the line connecting the antennas, a horizontal distance of 30.0 m to the right of antenna b. the frequency, and hence the wavelength, of the emitted waves can be varied. part a what is the longest wavelength for which there will be destructive interference at point q?

200 m

Explanation:

Path difference of waves from A and B = 100m

For destructive interference

Path diff = ( 2n+ 1 ) λ / 2

100 = ( 2n+ 1 ) λ / 2

λ = 200 / ( 2n+ 1 )

For maximum λ , denominator should be smallest  which is possible for

n =0

λ = 200 / 1

= 200 m

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.

temp rises, and expansion