Saturday
October 22, 2016

Posts by Jessica

Total # Posts: 3,191

AP Physics
A ball is kicked 30º above the horizontal with an initial velocity of 20m/s. A fence 2.3 meters high is located 32 meters away. a. How long does it take to reach the fence? b. Does it goes over the fence? Does it hit the ground before? By how much? I believe I have to ...
October 24, 2015

science
Red car is A. Blue car is B. The Blue car is slower than the A. The Red car starts at a starting point 40m behind the Blue at what point do they meet?
October 20, 2015

statics
A store clerk filing an order for 17 models of a new smart-phone inadvertently pulled some older models and included them in the order. There are 25 new models and 12 older models in stock when the clerk filled the order. Determine the probability that the company receiving ...
October 20, 2015

genetics
Consider a population where gene A come in two form, A1 and A2. This gene is not under selection and random mating occurs with respect to that gene and p= 0.5 and q= 0.5. What are the expected genotype frequencies in the next generation? To do this, you should find the ...
October 16, 2015

Chemistry: Equilibrium
So, I think I'm doing everything right and even checking my math, but it keeps showing up as wrong. If someone can help me and go into detail,including the quadratic formula, I would appreciate it: Phosphorus pentachloride decomposes according to the chemical equation Pcl5...
October 14, 2015

Louisiana History
Please help!!! 1. What set the steamboat apart from the flatboat and the keelboat? a) The steamboat was inexpensive to build. b) The steamboat could go back upriver with ease.*** c) The steamboat has a slow and easy ride. d) The steamboat could only transport people. 2. Why ...
October 12, 2015

math
Louann and Carla received equal scores on a test made up of multiple choice questions and an essay. Louann got 14 multiple choice questions correct and received 24 points for her essay. Carla got 16 multiple choice questions correct and received 14 points for her essay. How ...
October 8, 2015

Physics
A baseball is thrown at an angle of 29 degrees relative to the ground at a speed of 24.3 m/s. The ball is caught 51.0463 m from the thrower. The acceleration due to gravity is 9.81 m/s2 How high is the tallest spot in the ball's path? Answer in units of m
October 6, 2015

Union City
A segment of length 94 cm has rotated d degrees around center 0 what is the length? What is d and O
October 6, 2015

Louisiana History
D, B, A???
October 6, 2015

Louisiana History
1. Which was not a reason for the King of Spain to be cautious when siding with rebelling British colonists? A) The colonists were rebelling against a monarch B) Spain could acquire more land in the New World. C) The British colonists were not well-funded and not as powerful ...
October 6, 2015

Physical Chemistry
A saturated solution of Na2SO4, with excess of the solid, is present at equilibrium with its vapor in a closed vessel. (a) How many phases and components are present? (b) What is the number of degrees of freedom o the system? Identify the independent variables. Suppose that ...
October 3, 2015

Art
B) If, as Edmond indicated, Pont Neuf, Paris was painted during a single day, it was preceded by careful preparations, possibly including preliminary delineation of the permanent architectural features.
October 2, 2015

Louisiana History
Please Help!! 12. What was the main exploration goal of Robert Cavelier, Sieur de La Salle? A) to find gold and silver** B) to find an all-water route to China C) to establish a fur trade with the Indians D) to map the route of the Mississippi River
October 1, 2015

Louisiana History
Thank You!
October 1, 2015

Louisiana History
Please Help!! 10. Why was it necessary to move Fort Maurepas? A) Native Americans kept attacking the fort. B) The sandy soil the fort stood upon was useless for growing.** C) The king of France did not want the fort to be in a place that everyone could easily see. D) The ...
October 1, 2015

Louisiana History
Please Help!! 9. Why did Louisiana's proprietary governor, Cadillac, first have trouble with the Indians? A) He refused to smoke the calumet. B) He ordered raids on Indian settlements. C) He captured and made slaves of the Indians. D) He ordered the Indians off their ...
October 1, 2015

Louisiana History
Please Help!! 6. Which problem did Bienville address first when he returned to serve Louisiana's governor a second time? A) food shortage B) Indian relations C) lack of colonists D) money shortage
October 1, 2015

Louisiana History
Are the answers to 1. B, 2. A, C???
October 1, 2015

Louisiana History
Please check my answers 1.Which best describes the effect of European settlers on the culture of Native Americans in Louisiana? A) The Native Americans were left to prosper on their tribal homelands. B) The Native Americans turned increasingly from hunting and agriculture to ...
October 1, 2015

Chemistry
If you have light that has a frequency of 2.88 x 10 to -9 power Hz, what is the wavelength? I don't know how to do this and what formula to use.
September 30, 2015

Iodine-131 is a radioactive isotope. After 8.00 days, 50.2% of the sample remains. What is the half life of 131-I?
September 28, 2015

Math
The answer would be 57.1985401309. I'm not exactly sure how to explain it.
September 27, 2015

Quick math help
No, you are correct. Great job!
September 27, 2015

Chemistry I - University
Suppose 5.87 g of barium acetate is dissolved in 300. mL of a 71.0 m M aqueous solution of sodium chromate. calculate the final molarity of barium cation in the solution. You can assume the volume of the solution doesn't change when the barium acetate is dissolved in it...
September 27, 2015

Chemistry I - University Level
@ DrBob222 I know my ions are the same as my moles but I am having trouble understanding what I do next. Can you explain how you broke down this problem? What steps am I missing? Thank you!
September 27, 2015

Chemistry I - University Level
Suppose 5.87 g of barium acetate is dissolved in 300. mL of a 71.0 m M aqueous solution of sodium chromate. calculate the final molarity of barium cation in the solution. You can assume the volume of the solution doesn't change when the barium acetate is dissolved in it. ...
September 27, 2015

math
The price of a small cabin is \$55,000. The bank requires a 5% down payment. The buyer is offered two mortgage options: 20-year fixed at 7.5% or 30-year fixed at 7.5%. Calculate the amount of interest paid for each option. How much does the buyer save in interest with the 20-...
September 25, 2015

math
The price of a small cabin is \$35,000. The bank requires a 5% down payment. The buyer is offered two mortgage options: 20-year fixed at 7.5% or 30-year fixed at 7.5%. Calculate the amount of interest paid for each option. How much does the buyer save in interest with the 20-...
September 25, 2015

Physics
Suppose a rocket ship in deep space moves with constant acceleration equal to 9.80 m/s2, which gives the illusion of normal gravity during the flight. (a) If it starts from rest, how long will it take to acquire a speed 12% that of light, which travels at 3.0 × 108 m/s...
September 22, 2015

Chemistry
2H202-> 2H2O + O2 Suppose you carry out the decomposition using 25.0 mL of a 2.00M hydrogen peroxide solution and obtain the following: 8.62 mL of gas is collected in 120 seconds. How many moles of oxygen are produced per second?
September 21, 2015

Math
Gymnastic lessons cost \$30 per week. How much will 18 weeks of gymnastic lessons cost?
September 14, 2015

Chemistry
That's the same issue i'm having. This is directly from my printed lab sheet.
September 7, 2015

Chemistry
Experiment questions: Experiment 1 results mass of beaker:116.944 g mass of dodecanoic:11.629 g hot water: 175 C warm water: 10 C Average Fressing pt of Dodecanoic = 42.7 Experiment 2 results: Unknown C solution mass: 2.091g Hot water: 175C warm water: 10C average FP of UK C ...
September 7, 2015

physics
What state of the art computer technology is used to train pilots when wanting to copy the experience of flying an aircraft?
August 30, 2015

Math
If m and n are integers, which of the following must be an even integer? A. 2mn B. mn C. mn+2 d. mn-2 e. 3mn
August 25, 2015

English
Thank you!
August 23, 2015

English
Is the sentence "Confiscation is legal." a simple sentence where "confiscation" is used as a noun?
August 23, 2015

English
How would I use the word "Salvation" as a noun in a simple sentence? My first sentence was He gave salvation, but he is the noun in that sentence. My second sentence was Salvation was given.
August 23, 2015

Chemistry
in the equation, n = cv, what is the meaning of n? I know that it stands for the number of moles, but I'm not exactly sure what that means. Our teacher wants us to mention Avogradro’s number in our explanation
August 14, 2015

Calculus
I am so appreciative of your help, but what happened to the b?
August 6, 2015

Calculus
I have the question :A small blood vessel of radius 2mm branches off at an angle(theta) from a larger blood vessel of radius 4mm. According to Poiseuille's Law the total resistance to the blood flow is proportional to T=(a-bcot(theta)/4^4)+(bcsc(theta)/2^4) Show that the ...
August 6, 2015

Calculus
My question is:Use L'Hospital's rule to find limit as x approaches 0 (e^x-e^-x-2x)/x-sinx. 1st I took the derivative to get (e^x-e^-x-2)/1+cosx. Substituting in 0, I got -1. The answer is supposed to be 2.I also tried (e^x-xe^-x-2)/1+cosx, and wound up with -(1/2). I ...
August 6, 2015

Chemistry
H2=-0.0037 I2=-0.0037 Hi=0.0276 (0.0276)^2/(0.0037)(0.0037)=56 2.00-x +2.00-x==> 2x Am I heading in the right direction?
July 28, 2015

Chemistry
Determine the concentration at equilibrium if you start with 4.65 grams of Hydrogen and 200 grams of Iodine in a 4.55 liter container. If you now add an extra 1.25M of I2 after equilibrium, calculate Qc. Recalculate now what the concentrations should be at equilibrium. H2(g...
July 28, 2015

Math
Suppose the stock of Microsoft increases in value by \$5 per share. If all other Dow stock prices remain unchanged, how does this affect the DJIA? a) 37.80 points up b) 30.24 points up c) 22.68 points up
July 27, 2015

Math
Suppose the rate of inflation this year is 4.5%. What is the percentage decrease in the buying power of a dollar? a) 4.3% b) 4.7% c) None of the above.
July 27, 2015

Math
1. Suppose the buying power of the dollar decreases by 6.7% this year. What is the rate of inflation this year? a) 7.6% b) 7.2% c) None of the above.
July 27, 2015

Chemistry
The activation energy (E*) for a reaction is 195 KJ. If the k for this reaction is 3.46 x 10-5/min at 35oC, what will the temperature be in OF when k is 1.5 x 10-3/min?
July 22, 2015

Chemistry
You mix 45 ml of .20M HCl with 45 ml of .20M KOH in a calorimeter. The temperature of both reactions before mixing is 21.5oC. The temperature rises for the mixture to 22.7oC after mixing. What is the enthalpy change per mole of water produced?
July 22, 2015

Chemistry
(3.5x10^-3/5.3x10^-5)/(1/330)-1/285)=.0035
July 21, 2015

Chemistry
If the rate of the reaction is 3.5 x 10-3 at 330 K, and the rate of reaction at 285 K is 5.2 x 10-5 what is the activation energy Ea in KJ/mole?
July 21, 2015

Chem
450x2.010(110-100)=9045 8566.25+18828+9045+4183+89=40711.25 (40711.25)(114.2g/mol)= 4649334.74
July 21, 2015

Chem
2.010 Do I replace that with the 1.86
July 21, 2015

Chem
2.010
July 21, 2015

Chem
Steam : 450x1.86(110-100)=8370 8566.25+18828+8370+4183+89=40036.25kj (40036.25)(114.2g/mol)= 4572139
July 21, 2015

Chem
450x4.184(100)188280 450x4.184(110-100)= 18828 18828+4183=23011 23011g of gasoline
July 21, 2015

Chem
Cu specific heat: 0.385 H2o specific heat: 4.184 21+273.15=294.15 110+273.15=383.15 {I subtracted these and got} ______ 89 250x0.385(383.15-294.15)= 8566.25 450x4.184(383.15-294.15)= 167569.2 47(110-21)=4183 I'm lost on this problem
July 21, 2015

Chem
It's Jessica from my first screen name On this problem I wanted to know if I'm going with the correct formula q= CpxmassxTf-Ti 250 g being mass I just do t know how to set up the formula
July 21, 2015

Chem
When a piece of Copper weighing 250 grams is placed in a cup with 450 ml of water at 21OC and the Cp of the cup is 47 J/K, how many grams of gasoline would it take to heat the system to 110OC?
July 21, 2015

Chemistry II
CpxmassxTf-Ti (2.06)(275)(0-(-25))=14162.5 333J/100x14162.5 = 47161.125 47161.125+14162.5= 61323.625 61323.625(1gas/48,000)= answer: 1.277g of steam Thank you to the way for helping chemistry isn't my best subject so I apreciate the time y'all put in to help tutor
July 21, 2015

Chemistry
T1= 27+273.15=300.15K T2=90+273.15=363.15 K In(1/300.15)-(2/363.15)= 5.709???? Did I get it?
July 21, 2015

Chem
K=0.693/24 = .028875 In(.100/.33)/-.028875= 41.34 sec
July 21, 2015

Chem
-0.693/ In(.100/.33) = 17.23 seconds I know I did my math off but I'm not sure if I did it correct this time would it be 17.23 sec
July 21, 2015

Chem
0.693/In(.100/.33)= -.5804
July 21, 2015

Chem
If compound X has a first-order half-life of 24 seconds, how long would you have to wait for only 33% of the original material to be left? Explain why not knowing original Molarity of X does not effect this problem.
July 21, 2015

francais (french)
I just need to know if im right or not, and the right answers.. about the accents i know them i just cant type them here.
July 20, 2015

francais (french)
And about the "pour" and "de" this is how the sentence was given by my teacher.. so i cant change them i don't think..
July 20, 2015

francais (french)
My answers 1. desquelles 2. auquel 3. desquels 4. auxquelles 5. a laquelle
July 20, 2015

francais (french)
Remplissez les tirets avec la bonne forme de "lequel" If my answers are correct 1. Margo revait de sa soeur pour___ il avait de l'admiration 2. Voila une solution_____ je n'ai jamais pense(a) 3. Tout le monde admirait celle fille ______ on citait des poemes ...
July 20, 2015

media
Can the source language of the film have an impact on its diffusion and its distribution?
July 17, 2015

Calculus
My question is finding the derivitive of y=((x+λ)^4)/(x^4+λ^4). I distributed the exponent in the numerator, but I don't know if that's right. Rewritten as y=(x^4+λ^4)/(x^4+λ^4). I found the derivitive and multiplied accordingly, as ((4x^3+4λ^3...
July 15, 2015

Calculus
So, I have a homework question on The Quotient Rule (taking derivitives) and I would like to know if I did it right. Calculate: y=(1/sqrt(x))-(1/(5th root of x^3). My 1st step was to change the sqrt to x^1/2, and the 5th root to x^1/5+^3. So then I got y=(1/x^1/2)-(1/x^16/5). ...
July 15, 2015

College Algebra
Marcus bought y movie posters for \$3 each. Write an algebraic expression for total amount Marcus spent
July 13, 2015

Language
Click on the line with an error. We have already eaten lunch. Just between you and I, what did you think about the food? No error
July 11, 2015

physics
A 0.700 kg object is swung in a circular path and in a vertical plane on a 0.550 m length string. If the angular velocity at the bottom is 12.00 rad/s, what is the tension in the string when the object is at the bottom of the circle?
July 7, 2015

Algebra
A total of 598 tickets were sold for the school play. They were either adult tickets or student tickets. There were 52 fewer student tickets sold than adult tickets. How many adult tickets were sold?
July 6, 2015

Chem 105
A gas has a volume of 36.0 L and a pressure of 750. torr when the temperature is 10. °C. What is the pressure if the volume changes to 15.0 L and the temperature changes to 78 °C, if the amount of gas stays the same?
July 1, 2015

Psychology
When researchers find similarities in development between very different cultures, what implications might such findings have for the nature-nurture issue?
June 30, 2015

Physics
A motorcyclist who is moving along an x-axis has an acceleration given by a=(6.60-2.29t) for 0 >= t <= 6.0 s, where a is in m/s2 and t is in seconds. At t = 0, the velocity and position of the cyclist are 3.20 m/s and 7.30 m. For the time interval from 0 >= t <= 6....
June 29, 2015

english
June 23, 2015

english
I need a sentence that will finish my descriptive writing off with a funny personification? Aiming for level 7.
June 23, 2015

Math
Solve for x. Express the answer in simplest form. 1/7 = 3 over 4x - 1 1/7 is a fraction
June 6, 2015

Algebra
The height of a triangle is 4 in. greater than twice its base. The area of the triangle is no more than 168 in.2. Which inequality can be used to find the possible lengths, x, of the base of the triangle
June 6, 2015

Math
A spinner has three sections. The table shows the results of spinning the arrow on the spinner 80 times. Section 1 18 Section 2 30 Section 3 32 What is the experimental probability of the arrow stopping over Section 3? A. 1/3 B. 1/32 C. 3/32 D. 2/5
June 6, 2015

Chemistry
The density of pure diamond is 3.5 g/cm^3. The mass of a diamond is 0.25 g.Calculate its volume.
June 2, 2015

informal logic
Mrs. Orlof teaches two history classes, one in the morning and one in the afternoon. Yesterday she gave the same test to both classes. Anyone who failed the test must take a retest. Since a greater percentage of students who took the morning test failed the test than students ...
June 2, 2015

math
use inductive reasoning to determine the units digit of the number 2^44 the unit digit of 2^44 is_____ powers of 2- 2^1=2 2^2=4 2^3=8 2^4=16 and so on that last one they have is 2^12 so 2^44 would be 1.7592188?
June 2, 2015

math
Joanie wants to mail a package that requires \$1.30 in postage. If she has only 5-cent and 7-cent stamps, what is the smallest number of stamps she could use that would be totally exactly \$1.30? the smallest number of stamps is ____.
June 2, 2015

Math
a turtle is at the bottom of a 11 foot well. each day it crawls up 5 feet, but each night it slips back 3 feet. after how many days will the turtle reach the top of the well? the turtle will reach the top of the well after ___ days THANK YOU
June 2, 2015

english
Thank you
May 24, 2015

english
She attributed his shallowness to his luxurious upbringing, in which material comforts like fine clothes and large homes nurtured his sense of privilege. Which of the following is the meaning of "material" as used in the sentence above? A. The substance from which ...
May 24, 2015

english
The store will stay open later during the holiday season. The store will stock a variety of seasonal merchandise. The store will have many discounts available for holiday shoppers. 22. When revising the paragraph above, the writer should address which of the following? A. ...
May 24, 2015

Chemistry
At the start of the process 118 kg of isobutylbenzene is used and the overall yield of the 3 reaction steps is 24%, how many 400 mg tablets of ibuprofen will be produced? Isobutylbenzene: Chemical formula = C10H14 Molecular Weight = 134.22g 2-(4-isobuytlphenyl) propanoic acid ...
May 20, 2015

Chemistry
Choccamine and mintanol have Rf values of 0.81 and 0.21 respectively. What would the distance in centimetres (cm) between the two compounds be if the TLC was run on a TLC plate where the solvent front moved 8.9 cm from the baseline?
May 20, 2015

History
Who did Lincoln command as the first "General of the Union army"
May 18, 2015