Environmental Science
How do red and blue light differ?

The wavelength of red light is longer.
Red and blue light have different directions of polarization.
Blue light has a higher speed of propagation.
Red light has a higher intensity.

ANSWER DOWNLOAD EXAMIANS APP

Environmental Science
Biogas is composed of

carbon dioxide, nitrogen and hydrogen
methane, carbon dioxide, nitrogen and sulphur
ethane, carbon dioxide, nitrogen and hydrogen
methane, carbon dioxide, nitrogen and hydrogen

ANSWER DOWNLOAD EXAMIANS APP