Posts by Josh
Total # Posts: 1,965

physics
Water flows at 0.830 m/s from a hot water heater, through a 450kPa pressure regulator. The pressure in the pipe supplying an upstairs bathtub 3.70 m above the heater is 414kPa. 1. What's the flow speed in this pipe? 
Math
Determine the answer to the following: 9.70 x 108 x 9.6 x 101 = ?? Select one: a. 9.3 e10 b. 9.3 e8.0 c. 0.93 e10 d. 9.3 e8.0 
History
What natural resources have remained significant to Washington economic activity from the time of European colonization to today? 3 choice A. airplanes B. Factories C. Farmland D. Forests E. Genetics F. Railroads G. Research facilities H. Waterways My answers are factories, ... 
Math
Christopher mixes the letters s, e, l, e, c, t, e, and d thoroughly. without looking, allen draws one letter. expressed as a fraction, decimal, and percentage, what is the probability that allen will not select a consonant? A. 3/8 , 0.375, 37.5% B. 3/5 , 0.6, 60% C. 5/8 , 0.... 
History
Section 1 political power. all political power is inherent in the people, and governments derive their just powers from the consent of the governed, and are established to protect and maintain individual rights. ... section 33 recall of elective officers every elective public ... 
trig
Find the exact value of costheta if ,sintheta=2/3 and theta is in standard position with its terminal side in Quadrant IV. 
Math
i have 2 more questions: Stephen has a counter that is orange on one side and brown on the other. The counter is shown below: A circular counter is shown. The top surface of the counter is shaded in a lighter shade of gray and Orange is written across this section. The bottom ... 
Math
thank you so much 
Math
The figure below shows a shaded circular region inside a larger circle: A shaded circle is shown inside another larger circle. The radius of the smaller circle is labeled as r and the radius of the larger circle is labeled as R. On the right side of the image is written r ... 
Business Calculus
Let logb 2=2.217 and logb 3=3.417. Find logb 3b Please walk me through this steo by step. 
Physics (Projectile Motion)
Hi, thanks for the reply. When I do your method, the vi remains in the equations. i.e. t=2vi*sin(40)/9.81 When putting that back in to the equation for the horizontal distance in the x plane horizontal distance = vi*(cos(40)+6)*2vi*sin(4)/9.81 The issue here is that I do not ... 
Physics (Projectile Motion)
Two trucks are parked back to back facing in opposite directions on a straight, horizontal road. The trucks quickly accelerate simultaneously to 3.0m/s in opposite directions and maintain these velocities. When the backs of the trucks are 20m apart, a boy in the back of one ... 
Math
It's okay guys I figured it out. I failed and it gave me the right answers. 
Math
I'm also having trouble with this: A cone has a radius of 40 cm and a volume of 1875 cm cubed what is the volume of a similar cone with a radius of 16 cm? I think it's 113 m squared but I'm not sure. 
Math
Two cones are similar Cone 1 r=5 h=15 Cone 2 r=? h=18 What is the length of the radius of cone 2? is it 7? 
math
Ms Desai has $18 000 to invest and is looking at GICs. • Option A: 5year GIC at 2.45%, compounded annually. • Option B: 2year GIC at 2.2%, compounded annually; reinvest funds in a 3year GIC at 3.5%, compounded annually. Compare the future values of each option. ... 
Math
Real Estate an office building purchased for $1, 200,000 is appreciating because of rising property values in the city. At the end of each year its value is 105% of its value at the end of the previous year. a. Use a recursive formula to determine what the value of the ... 
sevier middle
Mimi works at a store where she earns a base salary of $82 per week plus a commission of 10% of sales. If Mimi sold $80 worth of merchandise last week, what was her total pay? 
Math 6th grade
You use a scale of 1inch = 280 feet to build a model of the Great Pyramid of Giza. The width of the base of the pyramid is 756 feet. What is the width of your model? a. 27 in. b. 3.4 in. c. 3 in. d. 2.7 in. 
math
if the sides are 18 24 and 30 what kind of angle is it 
math
Testing Laboratory Gloves The New York Times ran an article about a study in which Professor Denise Korniewicz and other Johns Hopkins researchers subjected laboratory gloves to stress. Among 240 vinyl gloves, 63% leaked viruses. Among 240 latex gloves, 7% leaked viruses. At ... 
stats
A study was made of 413 children who were hospitalized as a result of motor vehicle crashes. Among 290 children who were not using seat belts, 50 were injured severely. Among children using seat belts, 16 were injured severely (based on data from “Morbidity Among ... 
maths\
Write the ratio 2.5 to 3.15 as a fraction in simplest form 
maths
i think im suposed to put it ina equation is it like this ? n10+33 ? 
maths
Ten subtracted from a number is greater than thirtythree 
stats
Test the claim given, identify null hypothesis, alternative hypothesis, test statistic, pvalue or critical values, conclusion about the null hypothesis and final conclusion Environmental concerns often conflict with modern technology, as is the case with birds that pose a ... 
stats
test the claim, identify null hypothesis, alternative hypothesis, test statistic, pvalue and critical values, and conclusion The health of the bear population in Yellowstone national park is monitored by periodic measurements taken from anesthetized bears. A sample of 54 ... 
stats
find critical z values, in each case assume normal distribution applies. left tailed test. Alpha= 0.05 Can someone please explain how to do this? 
math
A medical researcher wants to determine whether male pulse rates vary more or less than female pulse rates. Using the sample pulse rates in Data Set 1 in Appendix B, the male pulse rates can be summarized with the statistics 40=n,69.4=x,11.3=s. For females, the statistics are,... 
AP Biology
If plants are grown for several days in an atmosphere containing 14CO2 in place of 12CO2, one would expect to find: very little radioactivity in the growing leaves large amounts of radioactive water released from the stomates a large increase in 14C in the starch stored in the... 
Chem Bob Pursley Please Help!
So I would like to check some of my answers. I really appreciate any help 1. Which of the following atoms or ions is diamagnetic; Cr Br Mn2+ B C4+  I said C4+ 2. Which of the following atoms or ions is paramagnetic? C4 S^4+ V^4+ Se2 Ge4+I said V^4+ 3.Which one of the ... 
BiologyASAP Bob Pursley to the resuce?
Also...A stock solution of ONPG has a concentration of 25 mM. Add 2.8 mL of buffer, 0.3 mL of enzyme and 0.9 mL of ONPG to a cuvette. What is the final concentration of ONPG in the cuvette? Answer below to one decimal place 
Help Bob Pursley
Do I not need to write Delta EA = 48 kj/mol 
Help Bob Pursley
So i am asked to write the equation representing the third ionization energy for Cr, and what I could come up with is Cr^2+(g)>Cr^3+ + e(not sure if I am right). For the second part I am told that the electron affinity of K is 48 kJ/mol, and i am supposed to write the ... 
Chemistry
So i am asked to write the equation representing the third ionization energy for Cr, and what I could come up with is Cr^2+(g)>Cr^3+ + e(not sure if I am right). For the second part I am told that the electron affinity of K is 48 kJ/mol, and i am supposed to write the ... 
math
After years of teaching, I can say (with 100% made up certainty) that the average number of questions the typical student can complete per minute is 5.Â If I choose any student at random (I'm looking at you), what is the probability that yo...er that student ... 
math
I got 12.6% thank you! 
math
During the winter it snows 3 out of every 10 days what is the probability that it will snow, in any given week 7 days, more than 3 times? 
Physics
34 
college chemistry
28.6 grams of SO2 react in the following synthesis: SO2+O2>SO3 How many grams of SO3 could be produced 
Language arts
The word expectations best describes which situation from “Two Kinds”? Waverly’s reputation as a chess champion the mother’s hopes for her daughter to become a prodigy Mr. Chong’s retirement from teaching piano the daughter’s performance at the ... 
Chemistry
Is S^(2) a conjugate base of a weak acid? I think it is not as a congugate base grabs a H^+ ion. am I right? 
Chemistry
Is S^(2) a conjugate base of a weak acid? I think it is not as a congugate base grabs a H^+ ion. am I right? 
Chemistry
Thank you! 
Chemistry
Order in the increasing value of their polarity? HF NH3 H2O CO2 here i used the scale and got their numbers. HF>H2O>CO2>NH3 am i correct? 
Chemistry
Actually they are the ones i need a comfirmation.Thank you! 
Chemistry
How do we order them considering their solubility? CH4 , NH3 , Cl2 , CO2 Ammonia make H bonds with water,which makes it the most soluble. CH4 only have Vander Valls forces. I've heard Cl2 disdolves in considerable amounts in water. So how do we order them? Cl2 
Chemistry
I meant C6H5NH23(CH2C*triple bond*CH) 
Chemistry
Can it reduce the triple bond in, aniline(CH2C*triple bond*CH) ? 
Chemistry
Does LiAlH4 perform any kind of a reaction with a triple bond? 
Chemistry
So this is not common to all reactions? Today morning we had a Chemistry exam and we were given this question. I can't remember the all but, 1)k 2)k/2 3)R 4)R/2 were there in the answers,where k and R are the reaction constant and the reaction rate of the reaction. So in ... 
Chemistry
Does the reaction rate of a zero order reaction becomes half of its initial value,if the concentration of the reactant becomes half of its initial value? 
Chemistry
Why is metanitro phenol more basic than paranitro phenol? 
Math
1cotx=1(cosx/sinx)= 1  ((1/2)(cot(x/2)))  ((1/2)(sec(x/2))) how to simplify this inside "ln"? can we substract them adding ln(loge) infront of them? 
Math
How do we integrate ln 1  cot x  0pi/4? 
Chemistry
Thanks! 
Chemistry
Can't we except a white percipitate(ethanoic acid),when ethanoyl chloride is dissolved in water??? 
Maths
Thanks Steve! 
Maths
a and b are perpendicular vectors.a=(2i+3j) and b=ti+dj(d>0 and i and j are unit vectors) and b=1 Find t and d? I know we have to use the cross product here. a.b=ab*cos(?/2) (2i+3j)(ti+dj)= ?13*1*0 2t+3j=?13*0 How do we find t and d? 
Chemistry
What makes the strongest cation in water? Al Na Fe K Mg I know that the OH^ ions from water are enough for the Al(OH)3 and Fe(OH)3 precipitates to appear and we've been taught that K,Na compounds are soluble in water too. And Mg(OH)2 needs a higher OH^ concentration to ... 
stat
Use table A  2 to find the probability of a randomly selected value is between 0.7 and 1.98. 
stats need help
If all the values in a data set are converted to zscores, the shape of the distribution of the zscores will not be the same as the distribution of the original data. True or False? 
Help me with math
Find the variance for the given data. Round your answer to two decimal places. 5.0, 8.0, 4.9, 6.8, and 2.8 
Math need help
Identify the type of observational study. Researchers plan to collect data by interviewing patients who have cardiac bypass surgery at several local hospitals beginning in January 2014. Crosssectional Retrospective Prospective None of these 
math
i am a 3 digit number. my ones is one more than my tens. my tens digit is 0. my hundreds is 4 more than my ones. what number am i? 
government
According to Journalism(.)org, most Americans get their political news from cable television. 24% of Americans reported that cable tv news was their main source of political information, followed by 16% saying social media. Only 3% and 2% of Americans said they got their news ... 
Chemistry
An unknown monoprotic acid has a pH of 2.87. Is this acid weak or strong if 22.32 mL of 0.112 M NaOH is required to titrate 25.00 mL of the acid? If the acid is weak, calculate its Ka. Answer is Ka = 1.8 x 10^5, but I don't know how to get there. Any help would be ... 
Chemistry
A 25.00 mL sample of a soft drink was titrated using 12.10 mL of 1.50 M NaOH. Given that the soft drink's monoprotic acid has a Ka value of 2.8 x 10^5, predict the pH of the soft drink. I know that the answer is pH 2.85 (our practice questions have an answer key) but I&#... 
Social Studies
How can a free press hold the government accountable? a.hosting opinion panels** b.offering prior restraint c.accessing classified info d.summarizing government actions 
math
When baking a cake, you have a choice of the following pans: a round cake pan that is 2 inches deep and has a 7 inch diameter a 6 inch × 9 inch rectangular cake pan that is 2 inches deep a. Which of these pans has the larger volume? Justify your answer. b. Excluding the ... 
math
A man travels 12km due north, then 5km due east and then back to the starting point on a straight road. What is the total distance traveled? 
Algebra
Enterprise chargesa flat fee of $500 and an additional $2.45 per mile hertz charges a flat fee of $70 and an additional $1.25 per mile driven write an equation to represent the cost, y, of driving x miles with enterprise. 
Calculus
I am given the true of false question: If f(x) is continuous and 0<=f(x)<=1 for all x in the interval [0,1], then for some number x f(x)=x. This seems intuitively true, but I'm not sure. All help is greatly appreciated. 
math
How much money must Andrea invest for 2 years in an account that earns an annual simple interest rate of 8% if she wants to earn $500 from the investment? 
MATH
The Bishop's Peak 4H club is having its annual fundraising dinner. Adults pay $25 apiece and children pay $10 apiece. If the number of adult tickets sold is twice the number of children's tickets sold, and the total income for the dinner is $1,800, how many of each ... 
Science
How many grams of Sodium chloride are in 53.2 g of solution that is 0.50% by mass sodium chloride? 
Maths
So route one will be 52/60 which equal 0.86 recurring and route 2 would be 0.86. So which is faster  is it router 2 and by how much? Thanks. 
Maths
Route 1  52 miles at 60mph. Route 2  43 miles at 50mph. Which route is faster and by how much? Thanks. 
science
A 50kg object moving at 12 m/s has a momentum of 600 kg ´ g m/s. What is the mass of an object, moving at 4 m/s that has the same momentum? 
ELA
so wuts the answer 
Political Science
Is it better for legislators to answer to party leadership or to the median voter? Why or why not? Just pros and cons of both would be of immense help to begin research to answer this prompt 
physics
Consider a wire in the shape of a semicircle of radius R, with a total positive net charge Q vistributed over the wire uniformly. Divide the wire into at least 8 equal pointlike “chunks” of charge. Then, for each “chunk,” sketch (on the same diagram) the ... 
physics
If a segment of wire has a net charge (uniformly distributed), and then its length is increased by 50%,by what factor has its charge density changed? If the original charge was 10.0 nC, how much charge must then be added to restore the wire’s original charge density? 
physics
What do you mean when you say NO? 
physics
Consider a wire in the shape of a semicircle of radius R, with a total positive net charge Q distributed over the wire uniformly. Divide the wire into at least 8 equal pointlike “chunks” of charge. Then, for each “chunk,” sketch (on the same diagram) the ... 
physics
How is it 3/2 the length? 
physics
If a segment of wire has a net charge (uniformly distributed), and then its length is increased by 50%,by what factor has its charge density changed? If the original charge was 10.0 nC, how much charge must then be added to restore the wire’s original charge density? 
physics
AN OCEAN WAVE TRAVELS 18.8 METERS IN 5.1 SECONDS. THE DISTANCE BETWEEN THE 2 NEAREST WAVE CREST IS 4.1 METER. WHAT IS THE FREQUENCY? 
physics
Evaluate the following statement (T/F/N), explain: If you reduce by half the distance between two point charges, you double the magnitude of electrical force that each exerts on the other. 
Science. HELP!!
If you decrease the frequency of a wave, how does the velocity change? 
social studies
calm down you dont have to wright a essay i forgot the s 
social studies
Which set correctly identifies the features shown on the map 1. A Andes Mountains. B Pamps 2. B Atacama Desert C Pamps 3.A Atacama Desert D Andes Mountains 4. C Andes Mountains D Pamps i think it is 1 im not sure 
Science! NEED HELP URGENT
What effect does amplitude have on velocity? 
ELA
"It seems to me that almost everything is a waste of time," he remarked one day as he walked dejectedly home from school. "I can't see the point in learning to solve useless problems, or subtracting turnips from turnips, or knowing where Ethiopia is or how ... 
Algebra2
thanks 
MATH URGENT HELP!
you put 5,000 in an account that is compounded quarterly. the annual interest rate ,r, is 4%. how much will be in the account after 10 years? 
word problems
Thank you 
word problems
In certain deep parts of oceans, the pressure of sea water, in pounds per square foot, at a depth of d feet below the surface, is given by P=16+7d/11 If a scientific team uses special equipment to measures the pressure under water and finds it to be 646 pounds per square foot... 
Math
Name the population and the sample in these two 1) The number of roadrunners born within a 50mile radius of lubbock 2) The cars traveling at a 75 kilometers per hour between beaumont and lufkin 
math help ASAP
NO SORRY NOT B I MENT D