The temperature and brightness of stars are shown on the
bright-temp graph
h-r diagram
star model
luminosity grid

Therefore, The temperature and brightness of stars are shown on the H-R Diagram.

Explanation:

A star’s brightness, or luminosity, depends on the star’s surface  temperature and size.

If two stars have the same surface temperature, the larger star will be more luminous.

The Hertzsprung-Russell (H-R)  diagram below is a scatter plot that shows the relative  temperatures and luminosity of various stars.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true