Saturday
February 13, 2016

# Posts by John

Total # Posts: 7,298

Science
what is the atomic symbol for the element chronium
August 31, 2012

John
For a small molecule with a diffusion coefficient of 10^-6 cm2/s, how far would it diffuse after flowing over 1 cm at a flow rate of 10 cm/s?
August 31, 2012

I REALLY DON'T KNOW
August 30, 2012

Isabella is hoping to get an A on her college algebra course. With just the final exam left to take, she currently has an average of 92 on her exercises. The quizzes count for 40%, exercises count for30% of the class grade. What is the minimal grade that Isabella must have on ...
August 30, 2012

Robert recently was hired as a technician in the firm. He is being paid \$1,250 every two weeks ( after taxes). His monthly bills are: Rent: \$900 electricity: \$110 car payment: \$350 car insurance: \$60 fuel for cars: \$90 groceries: \$180 credit cards: \$250 Given Robert's ...
August 30, 2012

August 30, 2012

Isabella is hoping to get an A on her college Algebra course. With just the finaL exam left to take, she currently has an average of 85 on her quizzes and average of 92 on her exercises. The quizzes count for 40%, exercises count for 30% of the class grade. What is the minimal...
August 30, 2012

A basic car rental charges a daily rate of \$29 a day plus \$.20 a mile. Suppose that you rent a car for a day and your bill ( before taxes ) is \$79. How many miles did you the car.
August 30, 2012

math
please help me I need to finish this so that I can go into grade 11. A new water tower must be equidistant from three communities. They are located at (-25, 20) (-5, -40) and (15, 30). Find the coordinates of the point where the water tower should be built which i am assuming ...
August 29, 2012

Lockers
I'm starting middle school and during the orientation they let us try out our lockers with our combination. I couldn't open it so my parents just told me that I would learn during school. It's the 3rd day and I still can't open it that good. Can anyone help me? D:
August 29, 2012

math
please help me I need to finish this so that I can go into grade 11. A new water tower must be equidistant from three communities. They are located at (-25, 20) (-5, -40) and (15, 30). Find the coordinates of the point where the water tower should be built which i am assuming ...
August 29, 2012

math
Find the inverse of an invertible function f(x). Use the figure to find the following: ƒ−1(-2)= ƒ−1 (-1)= ƒ−1(0)=
August 29, 2012

chemistry
the density of water at 40c is 0.992g/mL. what is the volume of 1.95 of water at this temperature
August 28, 2012

Algebra
Discuss the relationship between the FOIL method for multiplying polynomials and the distributive property of multiplication.
August 28, 2012

College Physics
I keep getting answer wrong. I don't know what I did wrong. I really need help please. I need help with 1 question. Can you help with this please if you don't mind? 1) Suppose you are given that z = c y^3/x^2 where c is some number. For a particular value of c, x and y...
August 26, 2012

MATH
A company sells cardboard that is thick. Write an equation to solve for the number of sheets of cardboard, c, in a pile that is thick. What must be done to both sides to solve the equation?
August 24, 2012

Physics
A man walks with an average speed of 1.3 m/s for 45 minutes. How far has he walked?
August 23, 2012

Geometry
If the size of a rectangle's area is twice as large as the size of it's perimeter, and the length of one of its sides is 4.5, what is the length of the other side?
August 22, 2012

Geometry
The area of a 300' by 400' rectangle is doubled by adding a strip of width around the perimeter. Approximately how wide is that strip?
August 22, 2012

math
A pendulum bob swings 6.0 cm on its first oscillation. On each subsequent oscillation the bob travels 1/3 of the previous distance. Find the total distance the bob travels before coming to rest.
August 22, 2012

algebra
Brenna earned 120 in simple interest in 9 months at an annual interest rate of 8%. How much money did she invest
August 21, 2012

geography
Maddie is correct! we are not geeks! (sort of.) we bring smartness into the world. go smart individuals!
August 21, 2012

English 125 introduction literature
major similarities and differences between the forms of drama, poetry, and the short story.
August 20, 2012

Physics
It's really 1 F 2 A 3 F 4 C I just did the assignment
August 19, 2012

physics
why it is easier to tear a paper towel off a full roll than a mostly used one?
August 17, 2012

Math
To open the chest of shells the souvenir merchant must enter a code. As his memory is poor, to remember the code he has filled in this speech bubble so that every statement is correct. What is the code? ? X number 1, ? X number 2, ? X number 3, ? X number 4. The multipliers ...
August 16, 2012

health
yall shouldnt talk to a teacher like that she tryna help yall stupid asses but it is what it is
August 14, 2012

algebra 2
t-9(t+11)
August 13, 2012

Chemistry
A metal element (M) forms a hexadentate complex with the ligand ethylenediammine (en). Its formula is M(en)32+. The metal ion and the ligand do not absorb in the visible region of spectrophotometer and a 1.00 cm cuvette, the following absorbances were measured for various ...
August 13, 2012

math
how do you put 1/4,2/3,-7,8,-9 in order
August 12, 2012

science
A chair of mass 15.5 is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force = 38.0 that is directed at an angle of 42.0 below the horizontal and the chair slides along the floor.Use Newton's laws to calculate the normal force ...
August 3, 2012

Algebra
Parking in a student lot costs \$1 for the first half hour and \$1.50 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time that a student can park in this lot for \$7? The longest time is [ ] hour (s) simplify your answer
August 1, 2012

math
Find the remainder when 1!+2!+...+299!+300! is divided by 21
August 1, 2012

math
Noting that 247=(13)(19), find the remainder when 13^18+19^12 is divided by 247
August 1, 2012

number theory
Find the remainder when 1!+2!+...+299!+300! is divided by 21
August 1, 2012

number theory
a) Find the last two digits(units and tens digit) in 1829^(1829) b) Find the units digit in 23^(7777)
August 1, 2012

number theory
Find the remainder when 1!+2!+...+299!+300! is divided by 21
August 1, 2012

number theory
Find the least positive integer that leaves the remainder 3 when divided by 7, remainder 4 when divided by 9, and remainder 8 when divided by 11
August 1, 2012

math
65.25 is 25% of what number
August 1, 2012

Physics
A police car traveling at 94.5 km/h is traveling west, chasing a motorist traveling at 77.2 km/h. (a) What is the velocity of the motorist relative to the police car? The magnitude and its direction (b) What is the velocity of the police car relative to the motorist? The ...
August 1, 2012

Math
Yes! Thanks!
July 31, 2012

Math
If xΩy is defined as the smallest integer of which both x and y are factors, then 10Ω32 is how much greater than 6Ω20?
July 31, 2012

Math
The null and alternate hypotheses are: H0: π1 ≤ π2 H1: π1> π2 A sample of 100 observations from the first population indicated that X1 is 70. A sample of 150 observations from the second population revealed X2 to be 90. Use the .05 significance ...
July 24, 2012

math
A river has a current of 4 mph. Find the speed of Simon’s boat in still water if it goes 40 miles downstream in the same time as 24 miles upstream.
July 23, 2012

Finance
why a firm might deviate from the matching principle by financing short-term assets with long-term debt. How would such a policy have affected a firm during the financial crisis?
July 23, 2012

math
Amy can clean the house in 7 hours. When she works together with Tom, the job takes 5 hours. How long would it take Tom, working by himself, to clean the house?
July 23, 2012

math
john takes 3hours longer than andrew to peel 400 pounds of apples. if together they can peel 400pounds of apples in 8hours then how long would it take john if he is working alone.
July 23, 2012

math
Frank can type a report in 4 hours and James takes 6 hours. How long will it take the two of them typing together?
July 23, 2012

math
A cyclist bikes at a constant speed for 18 miles. He then returns home at the same speed but takes a different route. His return trip takes one hour longer and is 23 miles. Find his speed.
July 23, 2012

math
The speed of a stream is 6 mph. If a boat travels 52 miles downstream in the same time that it takes to travel 26 miles upstream, what is the speed of the boat in still water?
July 22, 2012

Statistics
Suppose you and a friend each take different random samples of data pairs (x,y) from the same population. Assume the samples are the same size. Based on your samples, you compute r=0.83. Based on her sample, your firmed computes r=0.79 Is your friends value wrong? Explain?
July 21, 2012

Math( Geometry)
All three planes in the figure provided are parallel. They are cut by lines containing points A, B and C and X, Y and Z. Each of these points lies in a plane. If BC=8 cm, YZ=10 cm and XY=14 cm, find AB. A.)10 1/2 cm B.)10.2 cm C.)11 1/5 cm
July 14, 2012

Foreign languages
Writeacher, do you know anything about English conversation lessons on Skype? Can you please suggest sites which offer online conversation courses? Thank you for your invaluable help! My sister would like to take one-hour conversation lessons every two days with an English ...
July 13, 2012

Foreign languages
Can you check these sentences, Writaecher? 1) Can you please tell me how far ...... hotel is from the beach? 2) As a matter of fact, I was looking for a hotel on a seafront. Do you think I should opt for the ..... Hotel?
July 13, 2012

math
The times for completing one circuit of a bicycle course are normally distributed with a mean of 81.7 minutes and a standard deviation of 8.6 minutes. An association wants to sponsor a race and provide prizes for the top (that is, fastest) 15% of riders. Where should they ...
July 12, 2012

Foreign languages
Can you please check these sentences, Writeacher? 1) I would like to book a room with a double bed and a single bed (at a certain price) for person (sharing) which (alsoincludes breakfast and dinner for seven nights. (Can you help me express this sentence better?) 2) Prior to ...
July 11, 2012

Foreign languages
Thank you very much for giving me so much information ! Can you check these sentences for me, please? 1) Thank you for replying to my request of today. ... I would like to book a room with a double bed and a single bed at..... for person sharing which includes breakfast and ...
July 10, 2012

statics
The times for completing one circuit of a bicycle course are normally distributed with a mean of 81.7 minutes and a standard deviation of 8.6 minutes. An association wants to sponsor a race and provide prizes for the top (that is, fastest) 15% of riders. Where should they ...
July 10, 2012

math
Find the center, foci, and vertices of this hyperbola 16x^2-y^2-32x+8y+16=0
July 10, 2012

Foreign languages
We are looking for suitable accommodation in south-west Ireland. (on seafront, near Cork) Any ideas? Can you check these two sentences, Writeacher? 1) Does your hotel offer both a kids’club and a playground where my child can spend time outside? 2) It is important that ...
July 10, 2012

math
The scores on a mathematics test have a mean of 72 and a standard deviation of 5. Find the test score that corresponds to a z-score of (-1.33).
July 10, 2012

Math - Calculus
how to solve limits?
July 9, 2012

Foreing languages
Could you check if everything is correct, Writeacher? 1) My husband and I would like to spend the period from August ... to August .. in . We are looking for a four-star hotel on a sea front , which offers a a kids’ club as well as a playground where my five-year-old ...
July 9, 2012

Physics
The car in front of you is driving 105 km/h on the highway. You pull out to pass the car travelling 114 km/h. Both cars are 2.7m long. You pull out when you are 10m behind the car in front of you and pull back in when you are 10m in front of the other car. How long does it ...
July 8, 2012

CHEM
A metal, M, of atomic mass 91 amu reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 9.05-g sample of the salt is dissolved in 100.0 g of water ...
July 8, 2012

physics
a 10,000hg car rounds a curve of radius 1200ft at 50mph what is its centripetal acceleration?
July 7, 2012

Foreign languages
I'd like you to revise these sentences. I need to include words really used when enquiring for a hotel room. Thank you very much,Writeacher. 1)My husband and I would like to spend the period from 3 August to 20 August at Your hotel. In particular, we are looking for a ...
July 7, 2012

English
What is the meaning of "Once you have flown, you will walk the earth with your eyes turned skywards, for there you have been, and there you long to return."?
July 6, 2012

Foreign languages
Bob and Writeacher, I just wanted to inform you that my science project on water has been approved by the EU Commission. We'll be working on the project starting from September. (I will certainly need your help to work out a list of "scientific words" students ...
July 5, 2012

Foreign languages
I left out this sentence. Thank you. Complete the sentences with the correct form of the past simple, past perfect or past continuous.
July 4, 2012

Foreign languages
Can you please check these sentences, Writeacher? Thank you. 1) We have been waiting here nearly three hours (Can you omit "for"?) 2) “I’ve spent all my pocket money on this book!” (Sally/exclaim). She exclaimed she had spent all her pocket money on ...
July 4, 2012

Art
I still have a few other sentences to check. Thank you, Writeacher. 1) " I've spent all my pocket money on that book!" (he/exclaaim) He exclaimed that he had spent all his pocket money on that book. 2) "I'm going on a school trip tomorrow" (he/...
July 3, 2012

Art
I left out these last sentences on grammar.Thank you, Writeacher. 1) If the machine stops, you press this button. Incorrect: if the machine stops, you will press this button. 2) Complete the following sentences with who, which, whose. Write the relative pronoun in brackets ...
July 3, 2012

Art
I left out a sentence. Can you help me better express the following instruction? 1) Complete the following sentences with the past simple, past perfect, and past continuous. 1) My friend..... (be) upset because someone.....(steal) ........
July 3, 2012

Art
I left out the following sentences. Thank you, Writeacher. 1) "I'll drive you to the train station." (she/agree) She agreed to drive me to the ... 2) "If I were you, I'd run back home." (she/advise). She advised me to run back home. 3) "I won&#...
July 3, 2012

Foreign languages
Can you check if the following passive tenses are possible? Thank you. 1) The roof was being fixed The cathedral is being restored My wallet has been taken The dog is going to be taken for a walk 2) Who was America discovered by? Was this CD bought by Jennifer yesterday? I was...
July 3, 2012

Engineering Physics
At a location 4Re away from the center of the Earth, you release a 2kg object from rest. How fast is the object traveling when it is 2Re away from the center of the Earth? Re = 6.4 x 10^6 m Me = 6 * 10^24 m
July 2, 2012

Foreign languages
I left out this last sentence.Thank you. 1) He was exhausted because he ........................................... (work) hard all day. (he had been working all day)
July 2, 2012

Foreign languages
I left out these very last sentences on reported speech. Thank you very much! 1) “No, I didn’t break the vase.” (Mary/deny) Mary denied breaking .. 2) “I’m sorry, I broke the vase.” (He apologized for breaking the vase. 3) “ You should really...
July 2, 2012

Art
Thank you very much! Here are some more sentences I'd like you to check if the following sentences are possible. 1) I hate ….. (tell) you this but you didn’t pass your FCE test. 2) Lucy dreams of….. (go) to live in Australia. 3) Jack is looking forward to...
July 2, 2012

Art
Can you check if the following constructions are possible? 1)It was half past ten at night. Jane was in her bedroom (when) the doorbell rang. it was dark (so) she switched on the lights and went downstairs.“Shall I carry your bag, Lucy?” Tom offered to carry Lucy&#...
July 2, 2012

Foreing languages
Can you please check the following sentences? Thank you. 1) The fire officer warned us not to leave the heater on. He warned us against leaving the heater on. (are they both possible?) 2) Opium is widely used in medicine to ease bodily pains. Can you think of any English ...
July 2, 2012

Foreign languages
Can you please check linkers and punctuation in this paragraph? Thank you very much Writeacher. Complete the following short text with: and, but, so, because, when, while (I can't find an example of "while") 1) It was half past ten at night. Jane was in her ...
July 2, 2012

Foreign languages
Can you please check these sentences, Writeacher? 1) We...... (sit) in the sun for ... when she (tell) us to get inside. 2)We had been sitting in the sun for about half an hour when she told us to get inside. 3) Peter confessed to eating all the cake. (Peter/confess) (shall I ...
July 2, 2012

Engineering Physics
You want to use a spring (k=100 N/m) to send a 500-g mass up a frictionless incline (30 degree to horizontal) to arrive at a platform 3m above the ground. How far should you compress the spring?
July 1, 2012

MATH
A Starbucks on campus sells cappuccinos in three sizes: tall for \$2.65, grande for \$3.20, and venti for \$3.50. One morning, Brianna served 50 cappuccinos. The number of tall and venti cappuccinos, combined, was 2 fewer than the number of grande cappuccinos. If she collected a ...
July 1, 2012

Foreign languages
Can you check these other sentences, please? 1) "I ate all the cake yesterday." (Peter/confess to) Shall I include "to"??? 2) Peter confessed to eating all the cake. Peter confessed that he had eaten all the cake. 3) If Iknew the answer, I’d tell you. ...
July 1, 2012

Foreign languages
I left out the following questions. Thank you. 1) What effect did Poe aim to achieve in moast of his short stories? Which theory did Poe work out in his Philosophy of Composition and who was he inspired by? 2) What are the main feautures of Poe's tales? What do we get to ...
July 1, 2012

Foreign languages
Can you please check these questions, too? Thank you, Writeacher! 1) Which characteristics of the old ballad form does The Rime of the Ancient Mariner contain? In what way does the Rime depart from the ballad? 2) How are the elements of nature presentend in the first part of ...
July 1, 2012

Foreign languages
Thank you. Here are a few other sentences I'd like you to check. 1) How is the theme of the double investigated in Shelley's Frankenstein? As for Shelley's Frankenstein, both Doctor Frankenstein and his creature are complementary: They both suffer from a sense of ...
July 1, 2012

Foreign languages
Can you please check these questions, Witeacher? Thank you. 1) Focus on Chapter 10 of Stevenson's Dr. Jekyll and Mr. Hyde and describes how Dr. Jekyll manages to separate his two identities. 2) What kind of narrative technique does Stevenson adopt? 3) In what way are Dr. ...
July 1, 2012

Foreign languages
Writeacher, thank you very much! Can you please check these sentences, too? 1) They left for the supermarket a few minutes ago.My child is with them. They need to buy food for lunch and won't be back until noon. We'll spend the afternoon at home because it's ...
July 1, 2012

Engineering Physics
You want to use a spring (k=100 N/m) to send a 500-g mass up a frictionless incline (30 degree to horizontal) to arrive at a platform 3m above the ground. How far should you compress the spring?
July 1, 2012

Foreign languages
I urgently need you to check these few sentences, Writeacher. Thank you. 1) What did the U.S Immigration Restriction Act prohibit (Can you help me find a synonym?) It prohibited the immigration of those with hereditary illnesses and entire ethnic groups.ù 2) What kind ...
June 30, 2012

Maths
I can't understand this math problem.... Please help me.... ------------------ Problem: In a boys' school, 5/8 of the boys play football and 4/7 play rugby. If every boy plays at least one of the two games, find the fraction of the boys who play both
June 30, 2012