Estimated by the observer.
Take a buret, you can read to the 0.1 mL directly from the device, but the amount may lie between the 0.1 marks so you can estimate how far between the marks the fluid lies.
TºC + 273 :
23 + 273 = 296 K
Answer B
hope this helps!
C. Sonography
Sonography makes use of sound waves.
The answer is: [C]: "protons and electrons" .
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Letter B
without a medium, there is nothing to compress, hence, no wave. A fast- medium like a gas (air) is easy to compress and allows waves to move through it easily. a slow medium, like a liquid, is still pretty fast, but not as fast as air.
