Do all machines decrease force by a factor of 2?
I did a practice question that said a mass is on a board which pivots at one end and at the other end, a pulley is attached to the board. So 2 machines are acting on the mass. Then the solution said...
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REM SLEEP NEXT STEP PSYCHOLOGY
Go View attachment 195744 for those of u guys who have taken next step psychology practice book. Why is A THE ANSWER there is no evidence from that based on the graph . Why do non rem sleep participant...
View ArticleNa+/K+ ATPase question
The wording of the correct answer choice to the following question is confusing to me: Na+K+ ATPase is found in epithelial cells that produce urine or other excretions that are hypertonic relative to...
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EK Chem Lecture 3 - Enthalpy problem
I know how to compute enthalpy if there are two reactions but how do I go about figuring this out?? The explanation in the book didn't make much sense to me The standard enthalpy of formation for...
View ArticleSo once and for all, are these AA's hydrophobic or hydrophilic?
Are the polar, uncharged amino acids such as: serine, tyrosine, cysteine, etc. hydrophobic or hydrophilic? I have seen them labeled as either or in multiple reputable sources. I want to say they're...
View ArticleCommon Ion Effect
Hypothetical scenario (as in none of these values are true). Barium chromate solid (Ksp = 1 x 10^-5) is at equilibrium with its dissociated ions. If calcium chromate (Ksp = 1 x 10^-10) is added into...
View ArticleEntropy of a system as universe expands
I just encountered this problem in my EK book and am a bit confused: All of the following are examples of processes which increase system entropy EXCEPT: A. the expanding universe B. aerobic...
View ArticleExothermic reactions
In an exothermic reaction, does the negative energy value of enthalpy represent an amount of energy not at all used in the reaction so its released into the surroundings. sort of like an excess amount...
View Articlecan amides become protonated at low pH?
I've been reviewing some recent practice questions and realized that I'm not quite sure what to do with functional groups other than carboxylic acids or amines when the pH varies. If a compound has a...
View Articleanyone studying for 2016 mcat ???
looking for some study partners for 2016 mcat which I would like to take in april also what books should I study for 2016
View ArticleImpulse graph
View attachment 195925 View attachment 195927 Can you guys explain this for me? Answer is D and the only explanation is the formula Ft=m delta v but how do we figure out what delta v is?
View ArticlePhysics Question
Could someone explain this question to me? I don't get how they got that formula in the slightest (Spoiler:Second picture contains the answer for anyone wanting to attempt it themselves)
View ArticleInclusive fitness vs altruism
Can someone explain me the difference between the two.. Cause the definitions are quite similar
View ArticleStandard free energy change graph
View attachment 195948 How does this graph show standard free energy change throughout if the standard state is at 25 degrees C? I'm guessing my understanding of standard state is incorrect?
View ArticleBiochem question, help!
Hello all, I have no idea if this is an appropriate post (and if it is whether it's in the right area), but I was hoping to get some help with a biochemistry question! Thank you in advance for your...
View Articlenodes/ antinodes
TPR FL practice test question (chem section) gives a question asking what happens at the end of an open air column in an instrument. Without any background knowledge from the passage, I assume that...
View ArticleDifference between New MCAT and Old MCAT books
I have the old books from the old MCAT do they have the same things as the new ones? I know I need to buy something for the biochemistry and the Sociology and psychology but for the other stuff are...
View ArticleKA question on stereogenic centers
I found this odd question in the KA practice questions, and was wondering if anyone understands it: I thought there were 4 stereogenic centers, but apparently there's one, and I don't understand their...
View ArticleDouble-slit question
View attachment 196028 I drew the same double-slit setup twice, but on the right I showed the angle as being between the axis and the line from the midpoint of the two slits and the 1st point of...
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