Questions Asked on
September 30, 2017

Chemistry
How much reaction is complete when Kc=1, options: a.10% b.25% c.50% d.100% please explain the answer
asked by Plzzzhelppppmeee 
history
Which most accurately describes ancient Phoenicia’s agricultural practices? Phoenicia did not have much land for farming, but did grow fruits, wheat, olives, and grapes for wine Phoenicia had plenty of fertile land, where plums, apples, oranges, and
asked by Kira 
tourism and hospitality
Which most accurately demonstrates the development of civilization and culture in the Neolithic era? people progressed in metal work, now making steel tools instead of bronze tools people followed a nomadic lifestyle dependent on the migration patterns of
asked by Kira 
maths
If a= 2cosx+ isinx and b = 2cosy +isiny then prove that a+b = 2cos(xy)(cos(x+y)+isin(x+y))
asked by neha 
Chemistry
Bromine has two isotopes, Br 79 and Br 81. The relative atomic mass of bromine is 79.9. CALCULATE THE PERCENTAGE of Br79 atoms in a sample of bromine. PLease help i'm really stuck Someone said: The total for 79 and 81 is 100% and the total for fraction
asked by 0oooooooo0 
Physics
How do you set up and solve this question Ben (55 kg) is standing on very slippery ice when Junior (25 kg) bumps into him. Junior was moving at a speed of 8 m/s before the collision and Ben and Junior embrace after the collision. Find the speed of Ben and
asked by Felice 
Chemistry
A SAMPLE OF ANTIMONY, Ar=121.8, WAS ANALYSED AND WAS FOUND TO CONSIST OF 60% OF 121Sb AND ONE OTHER ISOTOPE. DETERMINE THE MASS NUMBER OF THE OTHER ISOTOPE IN THE SAMPLE OF ANTIMONY. please help I'm really stuck,
asked by 0oooooooo0 
Physics
A satellite is put into an orbit at a distance from the center of the Earth equal to twice the distance from the center of the Earth to the surface. If the satellite had a weight at the surface of 4000 N, what is the force of gravity (weight) of the
asked by Felice 
Maths
Two ships leave from the same port. One ship travels on a bearing of 157 degrees at 20 knots. The second ship travels on a bearing of 247 degrees at 35 knots. (1 knot is a speed of 1 nautical mile per hour). Calculate the bearing of the second ship from
asked by Carly 
maths
If a=cos2x+isin2x ,b=cos2y +isin2y prove thAt a+b=2Cos(xy)(cos(x+y)+isin(x+y))
asked by moyeon 
Chemistry
Lithium has 2 isotopes. The relative atomic masses are 6.02 and 7.02. The average relative atomic mass of lithium is 6.94. What is the calculated relative abundance of the lighter isotope?
asked by Min 
MATH
Amy is "n" years old. Bob, her brother, is 9 years older than amy. Their mother is 3 times as old as Amy. Theirfather is twice as old as Bob. (i) Write down an expression, in terms of "n" their fathers age??
asked by Marvin Simukonda 
Health care management
_______ is the process of checking performance against standards. A. Appraising B. Planning C. Controlling D. Organizing B
asked by Anonymous 
Language Arts
What impact did your Independent Reading selection have on you as a reader? Would you recommend your selection to a friend? Why or why not? Support your response with at least two pieces of evidence from your Independent Reading selection. Be sure to give
asked by Mark 
history
Which accurately describes the Roman Empire’s influence on the Celts throughout northern Europe? there is no evidence that the celts and the romans made contact the celts resisted roman rule by successfully defeating Julius ceasar advancing armies in
asked by Kira 
history
Which most accurately describes how religion impacted the Mayan culture? mayan priests performed human sacrifices to appease the angry gods the maya shared spiritual beliefs and cultural characteristics with their rivals, the Aztecs the maya believed in
asked by Kira 
Biology
A farmer grew only one type of onion. All of the onion plants died from the same disease. What can be said of this onion plant population. A. Only few plants were resistant to the disease B. All of the onion plants were resistant to the disease. C. The
asked by Anne 
Physics
if a machine is capable of accelerating at a constant speed of +20.0m/s^2 calculate the time required for it to go from 5.00m/s to +55m/s
asked by Sarah 
Chemistry
When 5 grams of wood burns completely and 15 grams of oxygen, 10 grams of water vapor and some carbon dioxide are given off. (How many grams of carbon dioxide would be produced in this example?)
asked by Plllllzzzzheeeelllppppmeee 
Biology
A farmer wants to propagate a good variety of a crop in a way which maintained all its desirable traits. Which of the following methods should be used? A. Self Pollination B. Vegetative propagation C. Growing seeds produced from this variety D.
asked by Anne 
English
1. I will hold the door open for you. 2. I will keep the door open for you. 3. I will stay the door open for you. 3. You should hold healthy. 4. You should keep healthy. 5. You should stay healthy.  Could the verbs,
asked by rfvv 
math
Calculate the accumulated amount of endofquarter payments of $10,000 made at 5.30% compounded monthly for 7 years.
asked by SANDEEP 
English Composition I
Argumentive Essay (3 pages) Topic question: Should future educational institutions move toward a specialized educational approach (as seen in technical school), and stray from the traditional wellrounded approach? I need help with: What keywords would be
asked by Serena 
English
I needed help on finding facts on people who believe in themselves or people who are committed are more successful and achieve their goals.
asked by HELP NEEDED BADLY 
Math
the number of housing foreclosures in 2009 was 3.998 million, up 81% over 2007. what was the relative change?
asked by Bo 
Algebra
If $6000 invested for one year yields $390 in interest, find the investment rate. how do I set up this problem?
asked by Kelley 
Chemistry
How much 5 M KOH must be added to 1.0 L of 0.1 M glycine at pH 9.0 to bring its pH to exactly 10.0? The amino group of glycine has a pKa of 9.6.
asked by Veronica 
college chem
When the following reaction reaches equilibrium, the concentrations are 2.26 M A, 0.50 M B, and 2.00 M C. Calculate the equilibrium constant. A+2B3C
asked by please help 
Math
The radii of two circles are 2:3.what is the ratio of their circumference
asked by Sadiya 
Advanced Algebra
Amanda earned a gross income of $37,250 last year. She made $489.78 in IRA contributions, donated $782 to her favorite charity and paid $1,276.65 in home mortgage interest. If Amanda claims a standard deduction of $5,700 and her exemption is $3,650, what
asked by Steve 
Spanish
Can you please check my grammar on these four replies? 1) What have you done today before studying Spanish? Antes de estudiar español hoy, me desperté, me duché y desayuné. 2) What would you do with 1 million dollars? Con $1M, viajaría y ayudaría a
asked by Tracie 
Health care management
Ideally, control should be a/an _______ function. A. retrospective B. anticipatory C. corrective D. reactive D
asked by Anonymous 
Social Studies
Although Tenochtitlán was a peaceful place, the Aztecs themselves were a warlike people. In the 1400s, Aztec warriors began conquering the other people in the region. Soon, the Aztecs controlled a huge empire. One ruler, the emperor, ruled over all the
asked by PLEASE ANSWER!! 
algebra
Solve the following equation for p: 5s  3p = fp + 12 the fp is confusing me so much, I've tried solving it so many times but this keeps getting me
asked by Kelley 
Algebra
x > – 5 and x < 2 How would I graph this? the greater and less then signs are confusing me
asked by Jen 
Math
What is the difference between sin and sin theta?
asked by Ubaid ullah 
Algebra
The cost of a long distance call is $0.31 for the 1st minute and $0.24 for each additional minute. How long can you talk without spending more than $5? (Write and solve an equation.)
asked by Jennifer 
algebra
The cost of a long distance call is $0.31 for the 1st minute and $0.24 for each additional minute. How long can you talk without spending more than $5? (Write and solve an equation.)
asked by Jen 
algebra
Three fourths of a number is less than two hundred four. What are the possible values of the number?
asked by Emma 
Chemistry
the solubility product of barium sulphate at 18Â°c is 1.5x10^9.its solubility at same temperature is
asked by Anonymous 
Physics
A physics student stands on the edge of a cliff 2x meters. He throws his physics homework straight up in the air. Derive an expression to calculate the time taken by the homework to come back to the student.
asked by Tyler 
Centripetal acceleration help
If a ladybug weighs 20g and is circling at a radius of 10 cm at 10 m/s, what is its centripetal acceleration m/s^2? I know centripetal acceleration = velocity squared/r, and velocity = angular velocity * radius... From these calculations I get 39476.089
asked by anonymous 
chemistry
Electrons travel in pairs. True or false? My workbook states, "Electrons like to travel in pairs so it's easy to see why covalent bonds form. It seems when an electron is unpaired it is "lonely" and can easily search for a friend. Of course, this is not a
asked by yup 
Social Studies
Why is the legacy of colonial powers a barrier to democracy in the Middle East?
asked by Amy 
tourism and hospitality
What country do tourists originate from?
asked by Kira 
English
a good student requires three essential characteristics; they must have a positive attitude towards learning, are willing to make mistakes, and possess good work habits. I would like a couple paragraph idea starters
asked by Ryan 
Geometry
∠ABC and ∠ABD are a linear pair. Prove that m∠ABC + m∠ABD = 180°. Write a paragraph proof
asked by Kathy 
Science
What caused the outer planets to have surfaces of liquids and gases
asked by Mell 
Geometry
Given: ∠ABC and ∠CBD are supplementary angles. m∠ABC = 4x + 7, m∠CBD = 2x − 1. Prove: m∠ABC = 123 How do I write this in a two column proof?
asked by Kate 
Physics
A ball is hit from horizontal ground with velocity (10i+24.5j) ms1 where the unit vectors i and j are horizontal and vertically upwards respectively. a)State two assumptions that you should make about the ball in order to make predictions about its
asked by 0oooooooo0 
history
Which most accurately describes the role of Abraham in the Hebrew scriptures? he led his people west from Mesopotamia to canaan, in present day isreal he fought and slew the philistine giant known as goliath he led his people against philistine. after he
asked by Kira 
Geometry
∠ABC and ∠ABD are a linear pair. Prove that m∠ABC + m∠ABD = 180°. Write a paragraph proof...I don't know how to write this out
asked by PLEASE HELP ME 
math
Segments MN, LT, PQ, and OR all intersect at point S. If m∠LSO = m∠PSN , prove m∠LSP = m∠OSN . write a two column proof
asked by Rachel 
BioChem
Calculate the final concentration of ONPG (in μM) if you add 6.16 mL of 3.3 μM ONPG and dilute to a final volume of 10 mL with PBS buffer. I thought you would use M1V1 = M2V2 however it came up wrong I know we are adding 3.84 mL of PBS to the 6.16 mL of
asked by Kody 
Chemistry
Why was the tert butyl chloride washed with aqueous sodium hydrogen carbonate? what gas was evolved during the washing? Write a balance equation
asked by Issac 
science
Both a globe and flat world map can model features of Earth. Give an example of when you would use each of these models.
asked by Anonymous 
English
Choose the meaning of the bold words Beowulf/Offered them only his sword, ended/so many JACKAL lives that the few/Who were able skulked silently home.(Beowulf) A:Enemy B:Defender C:Useless*** D:Weakened C:Useless is my answer....is this correct?
asked by marylyn 
Math
the wholesale price of the shows was 62% of their retail price. therefore the wholesale price was what % less than the retail price of the shoes?
asked by Bo 
math
If the relative change between the original price and the new price is 30% decrease, then the new price is ________% of the original price?
asked by Shadow 
Algebra
For the Function f(x)=2x²−2x+6, simplify problems A) & B) A) f(x+h) B) (f(x+h)−f(x))/h Please explain the steps you used.
asked by ALICE 
English
1. He called to her and offered his seat to her. 2. He called out to her and offered his seat to her. 3. He called her and offered his seat to her.  Are they all the same in meaning? Which one is commonly used?
asked by rfvv 
Maths
The cash price of a gas cooker is sh. 9000, a customer bought the cooking gas by 15 monthly instalments of sh. 950 each installment. Calculate the carryin charge
asked by Joyce 
Math
If a price increased from $4 to $5, then the new price $5 is what % of the original price. What was the relative change in Price? ____% ________
asked by Bo 
PE
A ________ is the way a person reacts to a situation based on the social environment in which a person grows up. Coping Strategy Defense Mechanism ** learned emotion primary emotion
asked by Mark 
English
1. I have to prepare for earning money in the future. 2. I have to prepare for making money in the future. 3. I have to prepare for geting money in the future.  Are they all the same? Is 'get money' used frequently?
asked by rfvv 
music
What is the difference among the musical instruments? Are they different slightly? 1. pipe 2. flute 3. recorder
asked by rfvv 
English
1. Peel the potatoes and cut them into pieces. 2. Skin the potatoes and cut them into pieces. 3. Remove the peel of the oranges. 4. Remove the skin of the oranges.  Can we substitute 'skin' for 'peel'? Are they all
asked by rfvv 
MATH
How much should Jessica have in a savings account that is earning 3.50% compounded semiannually, if she plans to withdraw $2,150 from this account at the end of every six months for 10 years?
asked by SANDEEP 
MATH
Tiffany invested $725 at the end of every month in an investment fund that was earning interest at a rate of 4.74% compounded monthly. She stopped making regular deposits at the end of 10 years when the interest rate changed to 6.69% compounded quarterly.
asked by SANDEEP 
history
how did the Agricultural Revolution impact religion and culture?
asked by Kira 
maths
Falco Inc. financed the purchase of a machine with a loan at 4.88% compounded monthly. This loan will be settled by making payments of $7,200 at the end of every month for 9 years. a. What was the principal balance of the loan?
asked by SANDEEP 
Math
If Sam paid 109% of the price, then the sales tax rate was what %?
asked by Bo 
Spanish
Ms. Sue and SraJMcGin, Thank you for your assistance earlier. Might I ask you again for your help with this homework assignment? I needed to read Act II of La dama del alba and answer 10 questions. Can you please check my grammar and sentence structure? 1)
asked by Tracie 
Algebra
Find the equation using the points. (1/2, 3/2) (1/2, 1/2) Answer: y=2x1/2 Please explain why this is the answer.
asked by Kimmy 
Science
Does the MidAtlantic Ridge have gabbro and peridotite rocks?
asked by Boruto 
Chemistry
Ytterbium, atomic number 70, is the first element in the Periodic table to have the first four shells full. a) State the number of electrons in the fourth shell/ level of ytterbium (1) b)How many orbitals are there in the third shell of ytterbium? (1)
asked by 0oooooooo0 
Chemistry
A 8.07g sample of impure Ag2O decomposes into solid silver and O2(g). If 395mL of O2(g) is collected over water at 25 degrees Celsius and 749.2 mmHg barometric pressure, then what is the percent by mass of Ag2O in the sample? The vapor pressure of water at
asked by Kim