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A stationary observer Bob, observes Alice take 5 seconds to travel from point A to B at 0.95c. How much time does Alice measure the journey from A to B to take?

This question is all about the application of Special Relativity. In order to solve this problem we need to identify that the correct equation to use here is:t= (gamma factor)t 0 Where t is the time observed...
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Answered by Elizabeth R. • Physics tutor
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Explain the difference between the cache memory and the buffer.

The cache memory aims to reduce the memory access time and thus increase your computer speed by storing frequently accessed data. A buffer, such as a printing buffer, is just a temporary memory storage that ...
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Answered by Cesar F. • Computing tutor
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What is the difference between data verification and data validation?

Data verification is a way of ensuring the user types in what he or she intends, in other words, to make sure the user does not make a mistake when inputting data. An example of this includes double entry of...
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Answered by Cesar F. • Computing tutor
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1 dm^3 of water steam at 200 degrees C, 10 bar enters a compressor. When it leaves, its temperature is 400 deg. C and volume 0.5 dm^3. Calculate the final pressure of steam. Critically discuss the assumptions you made in your calculations.

This question refers to the behavior of gases under compression. In IB we model such situations using the ideal gas equation, which states that: pV = nRT, where: p - pressure of the gas V – its volume n – nu...
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Answered by Marcin M. • Physics tutor
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Sort the following substances MgO, Na, H2O, H2S, NaCl, in the order of increasing melting temperature.

This question deals with the properties of substances and how they relate to their internal structure. First, we of course need to understand what the property we are asked to evaluate means. Melting tempera...
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Answered by Marcin M. • Chemistry tutor
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