Answer: A focal spot in the x-ray setup is the area of the anode surface which receives the beam of electrons from the cathode. It is the apparent source of x-rays.
Below are some of the factors that affect its size.
Explanation:
Size of the focal spot depends on
* angle of the anode
Other prime factors that affect x-ray emission; under the control of the radiographer includes;
• Miliamperage-second (mAs)(tube current measurement)
• Kilovoltage (kVp) Controls both the quantity and quality of the x-ray beam with the speed and energy.
• Distance (d) - Related to tube design and construction.
• Tube housing
• Target material
• Filtration
• Voltage waveform
Answer: alternative C
Explanation: Aerobic bacteria are oxygen dependant, and because of that they gather in blue and red areas since those are the <u>light spectra in which algae photosynthethises</u> the most. The <u>photosynthesis product is oxygen</u>, being this the reason why blue and red areas attract aerobic bacteria.
The blood collection centers eventually refuse to take her blood because the frequency with which she gave blood had left her anemic.
Anemia is a condition that develops when your blood lacks enough healthy red blood cells or hemoglobin.
<span>Therefore her heart must pump more blood to compensate for the lack of oxygen in the blood. The consequences are huge, leading to an enlarged heart or heart failure.</span>
