What three statements are true about the wave shown?

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

Describe the path of a ray that approaches a mirror parallel to the principal axis.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?