Which interaction with matter is responsible for the radiopaque areas seen on an image?

In the x-ray circuit, the transformer that helps control the number of electrons being boiled off the cathode is:

As scatter photon energy decreases, frequency:

As kVp increases:

An quality image is produced using a technique of 10 mAs, 100 kVp, at 180 centimeters. What would the radiographer need to do if the distance were changed to 100 cm to produce a similar acceptable image?  

In the x-ray circuit, the autotransformer has an incoming voltage or 110 with 180 turns selected on the primary side. What would the number of turns be on the secondary side if the secondary voltage of the autotransformer was 380?

All the following are considered additive diseases except:

Generally, what charge does the focusing cup have in a x-ray tube designed for general x-rays?

In the human body, ____ is the predominant interaction through the diagnostic x-ray range.

What is in control of average energy of x-ray photons at anode target?