X-rays _____.
were discovered by accident
have no uses today
reduced infection after surgery
were invented by the British Army
Final answer:
X-rays were discovered by accident when Wilhelm Röntgen found that they could pass through soft tissue but not denser bone, leading to breakthroughs in medical imaging. During World War I, Marie Curie advocated the use of mobile X-ray units for diagnosing soldiers. Radiology, the use of X-rays in medicine, remains a widely used diagnostic tool.
Explanation:
X-rays were discovered by accident by the German physicist Wilhelm Röntgen in 1895. The discovery occurred while Röntgen was experimenting with electrical currents and noticed that a certain invisible ray could pass through human tissue but would leave the shadow of bones on a screen coated with a metal compound. The ability of X-rays to pass through soft body tissue and be absorbed by denser materials like bone enabled, for the first time, doctors to see inside a living patient without surgery.
During World War I, X-ray technology became particularly useful in the medical field. Mobile X-ray units, which were advocated by Madame Marie Curie, greatly aided military doctors. These units were deployed to diagnose injured soldiers, improving medical care and enabling more effective treatments, such as the optimized removal of embedded bullets.
Furthermore, the use of X-rays in medicine, which is known as radiology, has become a central tool in diagnostics. Due to its relative cost-effectiveness compared to more sophisticated technologies, X-ray usage is widespread and extensive in medical diagnostics to this day.
in a forest ecosystem, a robin and a squirrel live in the same tree. the two organisms ___
T h e y. S h a r e. T h e. S a m e. H a b i t a t
The laws of motion discovered in the 17th century were used to explain force, movement, and acceleration for decades. However, by 1905, there were a number of findings that could not be explained by those laws. Which statement BEST describes the eventual outcome? A) The old laws of motion were discarded in favor of new ones. B) Scientists realized the limitations of the scientific method. C) Scientists formulated a new theory that elaborated on the original. D) All the calculations using the old theory were found to be incorrect.
Answer:
Option C
Explanation:
Law of motion is a scientific law and like all other scientific laws it does not guarantee accurate explanations to natural phenomenon. Therefore, from time to time with new discoveries, these laws need to be refined in order to comply with new findings and discoveries.
Therefore, when laws of motion could not explain the new findings it became essential to formulate a new theory based on the existing one.
Thus, option C is correct
What is the cellular boundary found in animal cells?