Why do I need a Doppler scan?

Why do I need a Doppler scan? Why do I need a Doppler ultrasound? Your doctor may suggest a Doppler ultrasound exam if you show signs of decreased blood flow in the arteries or veins of your legs, arms, or neck. A reduced amount of blood flow may be due to a blockage in the […]

What do you mean by impedance matching?

What do you mean by impedance matching? The term “impedance matching” is rather straightforward. It’s simply defined as the process of making one impedance look like another. Frequently, it becomes necessary to match a load impedance to the source or internal impedance of a driving source. What is impedance simple words? The definition of an […]

How do I refine a Google search?

How do I refine a Google search? Refine image searches Go to Advanced Image Search. Use filters like region or file type to narrow your results. At the bottom, click Advanced Search. How do you search smartly on Google? Here are some tips to search smarter so you can find what you’re really looking for. […]

How dangerous is a whirlpool?

How dangerous is a whirlpool? Whirlpools can be very dangerous and can cause drowning. Despite the danger, whirlpools are a fascinating natural phenomenon. Many people enjoy watching strong maelstroms spin away from the safety of dry land. Can you die from a whirlpool? The power of natural whirlpool is often exaggerated by fiction, as there […]

Is Justified True Belief Knowledge Edmund gettier?

Is Justified True Belief Knowledge Edmund gettier? In his 1963 three-page paper titled “Is Justified True Belief Knowledge?”, Gettier attempts to illustrate by means of two counterexamples that there are cases where individuals can have a justified, true belief regarding a claim but still fail to know it because the reasons for the belief, while […]

What evidence does the fossil record provide?

What evidence does the fossil record provide? Fossils document the existence of now-extinct species, showing that different organisms have lived on Earth during different periods of the planet’s history. They can also help scientists reconstruct the evolutionary histories of present-day species. Why are fossils so hard to find? Fossils are rare because their formation and […]

Why do things stick to glass?

Why do things stick to glass? The short answer is that glass–an amorphous compound containing primarily silicon and oxygen–tends to form something known as silanol on its surface. They form hydrogen bonds with liquid water, causing it to adhere to the surface of the glass very strongly. Why does water wet glass and mercury doesn […]

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