aakash

What is the mechanism for the L-phenylalanine using sodium nitrate under acid conditions as H2SO4 ( two Sn2 reactions)? Show arrows and explain.

What is the mechanism for the L-phenylalanine using sodium nitrate under acid conditions (Sn2)? Show arrows and explain.

Please provide the mechanism for the conversion of L-phenylalanine into L-phenyllactic acid using two SN2 reactions. L-phenylalanine reacts with NaNO2/H2SO4. Include arrows and lone pairs

Which curved arrow mechanism is correct for the acetylation of DL-phenylalanine? 

prove that f(x)=x^2 is uniformly continuous on [0,1] but not uniformly continuous on R using epsilon-delta definiton

prove or disprove that there exists a function f such that f' exists at each x in [0,1], but f is not uniformly continuous on [0,1].

Assume D is bounded, f maps D to R is continuous. , the IntegraD or f exists. Prove or Disprove: D has area.

(1 point) A culture of yeast grows at a rate proportional to its size. If the initial population is 2000 cells and it doubles after 2 hours, answer the following questions.

1. Write an expression for the number of yeast cells after t hours. 

Anser P (t) = ..............................

2. Find the number of yeast cells after 10 hours.

Answers: ..........................

3. Find the rate at which the population of yeast cells is increasing at 10 hours.

Answer (in cells per hour):............................

https://othersociologist.com/2019/10/06/gender-race-and-ableism-in-joker/

1. What critical lens does this article oppose and why

1. what critical lens does the short story “the yellow wallpaper” and this article have in common together and why

A psycholinguist tested three groups of speakers (young, middle-aged, and old) in a lexical decision task, in order to see if age makes a difference in the speed of deciding whether a word is real or not. The data in sa2.txt is partial results from this experiment, where the age column records which group of speakers the observation was from, and the RT column records the reaction time.

.R file

Write an R script that does the following things:

1. For each level of the independent variable, compute the mean of the dependent variable. Store your computations in the variables young.meanRT, middle.meanRT, and old.meanRT.

2. For each level of the independent variable, compute the median of the dependent variable. Store your computations in the variables young.medianRT, middle.medianRT, and old.medianRT.

3. For each level of the independent variable, compute the standard deviation of the dependent variable. Store your computations in the variables young.RTsd, middle.RTsd, and old.RTsd.

4. The data for the young and middle-aged speakers is normally distributed. Compute the following using the z-score formula.1 

• For the young speakers, what proportion of reaction times is faster than 550ms? For the old speakers? Store your calculations in young.faster and old.faster.

• For the young speakers, what proportion of reaction times is slower than 800ms? For the old speakers? Store your calculations in young.slower and old.slower.

• For the young speakers, what’s the reaction time where 15% of reaction times are predicted to be that fast or faster? What about for the old speakers? Store your computations in young.faster.15percent and old.faster.15percent.

Your R file should run with no errors.