Rachael
Popular questions and responses by Rachael
PHYSICAL SCIENCE PLEASE HELP REALLY APPRECIATE IT!
In the reaction between bromine and sodium, a bromine atom gains an electron. What ion is formed? Is the bromine oxidized, or is it reduced? Thank You ^_^
asked on December 14, 2011 
Social studies
Infer which "great victory" the author references in the excerpt? election of the first female governor success of the first women's labor strike*** passage of the Equal Rights Amendment passage of the 19th Amendment *** = my answer Am i right?
asked on March 20, 2019 
Chemistry
HCl(aq) + LiOH(aq)> H2O(l) + LiCl(aq) Did I do this right? I need help on finding the net ionic equation
asked on October 24, 2016 
Chemistry
Phthalic acid, H2C8H404, is a diprotic acid used in the synthesis of phenolphthalein indicator. Ka1= 1.2x 10^3, and Ka2 = 3.9 x 10^6. a) Calculate the hydroniumion concentration of a .015 M solution. b) What is the concentration of the C8H4O4^2 ion in
asked on April 2, 2007 
Science
A slab of granite has a mass of 1400.0 grams. The specific heat of granite is 0.040 J/gC. How much heat must be absorbed to raise the granite slab's temperature by 75 degrees C? 11.8 kJ 80.5 kJ 88.2 kJ 19.5 kJ I've tried solving this several times and I
asked on March 16, 2016 
Math
Consider the experiment of drawing two cards from a deck in which all picture cards have been removed and adding their values (with ace = 1). A. Describe the outcomes of this experiment. List the elements of the sample space. B. What is the probabilit of
asked on August 17, 2013 
math
Four key marketing decision variables are price (P), advertising (A), transportation (T), and product quality (Q), Consumer demand (D) is influenced by these variables. The simpiest model for decribing demand in terms of these variables is: D = k  pP + aA
asked on September 7, 2013 
physics
"A cab driver picks up a customer and delivers her 3.31 km away, driving a straight route. The driver accelerates to the speed limit and, upon reaching it, begins to decelerate immediately. The magnitude of the deceleration is 4.70 times the magnitude of
asked on June 1, 2012 
Physics
Two young sisters with a combined mass of 75 kg ride on a cart of mass 30.0kg travelling at 2.0 m/s. If they jump off together so they land with zero speed relative to the ground, what is the change in speed of the cart?
asked on January 17, 2010 
Chemistry
The question is: Hydrogen and oxygen gas combine explosively to produce water. Write a balanced chemical equation for this process. If 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced? Is this right for the balanced
asked on January 15, 2011 
Math
Meat patties are sold in packages of 12. Buns are sold in packages of 8. What is the least number of meat patties and buns needed to have an equal amount of each?
asked on December 11, 2008 
math
Consider the experiment of drawing two cards from a deck in which all pictures cards have been removed and adding their values (with ace =1). A. Describe the outcomes of this experiment. List the elements of the sample space. B. What is the probability of
asked on August 18, 2013 
chemistry
concentrated sulfuric acid is typically 18.1 M H2 SO4. Calculate the volume in mL of concentrated sulfuric acid needed to prepare 125 mL of a 0.100 M H2SO 4 solution
asked on April 23, 2013 
chemistry
A student measures the mass of a book as 12,321g. What is the book's mass in kg?
asked on August 23, 2007 
Chemistry
Given that the specific heat capacities of ice and steam are 2.06 J/g degrees celsius, respectively, and considering the information about water given in exercise 16, calculate the total quantity of heat evolved when 10.0g of steam at 200. degrees celsius
asked on April 16, 2012 
Physics
What, roughly, is the percent uncertainty in the volume of a spherical beach ball whose radius is r = 2.86 plus or minus .09 m? I know I need to use the formula (4/3)*pi*r3 somewhere in this problem because of the details given, but I'm totally confused.
asked on August 22, 2007 
math
The surface area and the volume of a sphere are both 3 digit integers times π. If r is the radius of the sphere, how many integral values can be found for r?
asked on October 16, 2019 
Chemistry
Identify the acid or base behavior of each substance in this reaction: H2PO4 + H2O H3O+ + HPO4
asked on May 11, 2011 
chemistry
Calculate the pH for each of the following cases in the titration of 25.0 mL of 0.180 M pyridine, C5H5N(aq) with 0.180 M HBr(aq): 1)before addition of any HBr 2)after addition of 12.5 ml of HBr: 3)after addition of 16 ml of HBr: 4)after addition of 25 ml
asked on February 6, 2014 
math
A researcher was interested in the emotional effects of music on exam performance. Before their exam, a professor took one group of students into a room in which calming music was played. A different group of students were taken to another room in which
asked on September 21, 2013 
Chemistry
Standardization of iodine solution was prepared using 10.0 mL of a standard, 1.00 mg/mL, ascorbic acid solution. Titration with the iodine solution required 35.80 mL to reach the end point. What is the molarity of the iodine solution?
asked on October 26, 2016 
AP Calculus
Two ships sail from the same port. The first ship leaves port at 1:00a, and travels eastward at a rate of 15 knots. the second ship leave port at 2:00am and travels northward at a rate of 10 knots. Determine the rate at which the ships are separating at
asked on January 18, 2013 
Chemistry
The question is: Isotonic saline is a 0.9% (g/100ml) solution of salty water. You are asked to make up 2L of isotonic saline. How much salt should you weigh out? I got the answer of 18g with the following working: 9 ÷ 1000(ml) x 100 = 0.9 Therefore 9% of
asked on January 15, 2011 
Investigation
Conduction, convection, or radiation? The heat you feel from a fireplace
asked on January 11, 2010 
Physics
A stunt pilot is attempting to drop a water balloon from a moving airplane onto a target on the ground. The plane moves at a speed of 82.8 m/s and a 49° above the horizontal when the balloon is released. At the point of release, the plane is at an
asked on October 7, 2014 
math
The height, in feet, of a freefalling object t seconds after being dropped from an initial height s can be found using the function h = 16t2 + s. An object is dropped from a helicopter 784 feet above the ground. How long will it take the object to land
asked on May 16, 2010 
Social Studies
What is the name of the mixture of sand, lime, and water used as lubricant to help move stones?
asked on December 11, 2008 
Chemistry
"Solid dinitrogen pentoxide is added to water." I got this as my answer: N2O5 + H20 > 2HNO3. Do I need to break 2HNO3 apart since it's a strong acid? I thought it wouldn't since I thought it was a synthesis problem. I read online that this was the answer
asked on May 6, 2007 
Maths
Joy receives a normal hourly wage of $18.60 and timeandahalf for any overtime. On public holidays he receives double time with a minimum of 4 hours paid. What is his wage for a week in which he works 40 normal hours, 6.5 hours overtime and 3 hours on a
asked on February 25, 2017 
economics
1. Pick a business that you are familiar with and list three (3) fixed and (3) variable inputs associated with that business. 2. What are some things that you think that business could do to reduce their costs? Why?
asked on July 25, 2011 
Financial Management
I need to fill in the blanks on my income statement/balance sheet. Here is the information given: The following data pertain to Pavilion Products Inc. (PPI): PPI has outstanding debt in the form of accounts payable, 6month notes payable, and longterm
asked on September 21, 2008 
physics
A block is released on an inclined plane from a height of 1m. There is friction (static and kinetic =.4) and the mass of the block is 5 kg, the mass of the pulley is 1 kg and it has a radius of 5 cm. The slope of the incline is 30 degrees. Find the
asked on November 18, 2011 
6th grade math HELP
You have a triangle that measures 180 degrees. AB is 4 units. the measure of BC is 5 units. The measure of CD is 12 units. What is the measure of DE and how did you get that answer?
asked on April 18, 2010 
Mathematics
An old table in a furniture store is marked down by 10% from its previous price on five separate occasions. What is the total percentage reduction in price correct to two decimal places
asked on February 21, 2017 
Stats
A class of 85 students writing an exam had a mean mark of 74.2 write down the total sum of the 85 grades.
asked on September 26, 2012 
Physics
A football is punted up into the air and it lands 5 seconds later. How high did the did the football reach it's highest point and when does it reach this height?
asked on October 3, 2011 
Maths
Thomas received $2176.10 as a holiday loading payment (17.5% on 4 weeks pay). What is his weekly wage?
asked on February 25, 2017 
College Geometry
A circular grassy region with a 12 ft diameter has a 2ft by 3ft reflecting pool in its center. What is the Surface Area of the reflecting pool? What is the Area if the grass?
asked on September 11, 2011 
trig
solve each equation for 0 less than or equal to x greater than 2ð. cot²xcscx=1 thanks:) step by step please :)
asked on March 9, 2011 
BIOLGY
1.Penut butter ,chiken and eggs are high in what nutrient? 2.What nutrient is used to build muscle and energy? 3.Olive oil is high in whaY KIND OF FAT? 4.WHAT ARE TWO FOODS THAT HAVE GLYCEMIC INDEX AND WHAT FOODS ARE LOW IN IT? What is protein, protein,
asked on November 1, 2006 
Chemistry
The Ka value for ethanoic acid is 1.8x10^5, what would be the pH of a 2.0x10^2 M solution of ethanoic acid?
asked on February 27, 2011 
algebra
Is the relation y> the absolute value of x+3 a function? Why?
asked on September 25, 2010 
History
Hi, my history task for this weekend is to write an essay on this topic: "Women in World War II: An important step in the women's lieration or another opportunity for exploition" Could you give me any insight,tips,information or starters to make this
asked on April 19, 2008 
algebra II
which of the following relationships is a function a.Domain Range B.y^2=x^23x+4 3 2 4 1 7 c.Domain Range C.y^2=2x^2 13 0 2 4 1
asked on March 10, 2008 
Ethics
what measurements do sociologists utilize to calculate prejudice
asked on May 1, 2011 
Math
What are the 3 numbers that com after trillion. I'm talk about this Ex: million then billion. I want to know what comes after trillion 3 times.
asked on December 12, 2008 
Math
Find three pairs of numbers for which the least common multiple equals the product of the two numbers
asked on September 25, 2008 
Math
Suppose that the service rate to a waiting line system is 10 customers per hour (exponentially distributed). Analyze how the average waiting time is expected to change as the arrival rate varies from two to ten customers per hour (exponentially
asked on September 14, 2013 
math
Consider the experiment of drawing two cards from a deck in which all pictures cards have been removed and adding their values (with ace = 1). A. Describe the outcomes of this experiment. List the elements of the sample space. B. What is the probability of
asked on August 17, 2013 
math
A helicopter is 400 miles directly north of Ghana and is flying at 20 miles per hour. A second helicopter is 300 miles east of Ghana and is flying west at 15 mph. What is the rate of change of the distance between the helicopters?
asked on December 30, 2010 
alegebra
a stone is thrown into a cylindrical water tank 2 feet in diameter, causing it to rise 1.5 inches. what is the volume of the stone?
asked on January 14, 2009 
Accounting Balance Sheet  please help!!!
The following data pertain to Pavilion Products Inc. (PPI): PPI has outstanding debt in the form of accounts payable, 6month notes payable, and longterm bonds. The notes carry a 10% interest rate and the bonds carry an 8.5% rate. Both the notes and bonds
asked on September 21, 2008 
Calculus
If F(x)=x^3−7x+5, use the limit definition of the derivative to find FŒ(5), then find an equation of the tangent line to the curve y=x^3−7x+5 at the point (5, 95). FŒ(5)= The equation of the tangent line is y = x + . Check your answer for
asked on June 9, 2013 
chemistry
How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?
asked on September 27, 2012 
algebra
what is a simplified expression for the perimeter of the given rectangle? length=2L5 width=L
asked on September 18, 2008 
history/early exploration
what is another name for the mississippi river? all i know is that is "the fater of ______" something! PPLLLLEEASSSSSEE HELP
asked on September 9, 2008 
Government
What are basic features of the American concept of Democracy?
asked on May 27, 2008 
math
If Jenny built a triangle out of soup cans and there are 4 at the top row she added 2 cans to every next row so there are 8 cans in the second row. How many cans are in the 12th row?
asked on October 15, 2007 
maths
Given the the instantaneous voltage across a capacitor is VC=40(1e t/CR) Volts When being charged by a 40 volt DC supply, find the time, t for VC to reach 18 volts after the charging process has started if C = 100ìF and R = 20kÙ
asked on March 22, 2013 
Math
Two cats are taking a walk. 1 cat runs off. three cats come back. 1 cat sits down. How many cats in all are there if 6 more cats came back with one of the cats being the one that ran off?
asked on December 11, 2008 
French
Good Afternoon, Could you please see if i have translated this english to french correctly? Most squirrels are active during the day, beginning at dawn, often resting midday, and active again until dusk. Squirrels are most active during the fall,
asked on April 19, 2008 
Managerial Economics
Why the cost structure associated with many kinds of information goods and services might imply a market supplied by a small number of large firms.
asked on February 15, 2014 
chemistry
How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?
asked on September 27, 2012 
Chemistry
The Ka value for ethanoic acid is 1.8x10^5, what would be the pH of a 2.0x10^2 M solution of ethanoic acid?
asked on February 27, 2011 
math
Suppose that the multiplication and division keys on your calculator were broken. Explain how you can calculate 452 x14 by using other keys on the calculator.
asked on February 11, 2010 
Social Studies.
where can i find information to answer these questions How do you think an average American’s perceptions of Muslim and Arab groups are created and what people think are the common United Statescentric viewpoints on Muslim and Arab American and
asked on December 1, 2007 
Physics
a missile is launched off a jet fighter travelling 300 meters per second. it accelerated with a constant acceleration of 100 meters per second. when it has traveled 5000 meters what will its velocity be?
asked on October 5, 2015 
algebra 1
N decreased by 12 is greater than or equal to 11?
asked on October 19, 2011 
algebra
How do i compute the track of two circles one with a diameter of 100 feet, the other with a diameter of 200 feet? The question asks me to compute the length of the track with these two circles touching each other at a single point.
asked on June 2, 2010 
reading
What is an appositive?
asked on April 22, 2010 
6th grade
The measure of AB is 4 units, the measure of BC is 5 units and the measure of CD is 12 units. Find the measure of DE?
asked on April 15, 2010 
chemistry
The Burning MG in CO2 reaaction had deltaG=746 kJ/mol at 298K. Calculate the equilibrium constant for this reaction.
asked on March 6, 2010 
spanish
How do i say i don't like history?
asked on November 19, 2009 
Art history
what are the major connections between the ashcan schools ethics and todays documentary photogrphers such as nan godin and corrine day?
asked on February 2, 2009 
english
I would like for someone to look over my assignment for accuracy. Thanks Rewrite the following sentences, focusing on the grammar area specified in the left column. If the sentence is already correct, write No Change. Punctuating Sentences The goose bit
asked on November 30, 2007 
everest
What number is 45% of 680
asked on November 12, 2013 
algebra 1
N decreased by 12 is greater than or equal to 11?
asked on October 19, 2011 
Chemistry
Show that the pH of a solution is 0.301 when its hydroniumion concentration equals 2 M. Is the solution acidic or basic?
asked on May 10, 2011 
mathematics
given the mirror formula 1/f=1/v1/u,f is the focal length of the lens u and v are object and image distance respectively .find f when u and v are 7.5cm and 3.5cm respectively
asked on December 23, 2016 
math
If 30 samples of 100 items are tested for nonconformity, and 95 of the 3,000 items are defective, find the upper and lower control limits for a chart.
asked on August 31, 2013 
math
In developing a multiple linear regression model in excel. How do I find the x and Y inputs. How do I find a 95% confidence interval for the mean market value for houses that are 30 years old and have 1,800 sq ft, and 95% prediction interval for a house
asked on August 25, 2013 
Social Studies
Who were the first Native American groups to settle in Ottawa, Illinois? Where did they come from? What kind of people were they?
asked on October 5, 2009 
Math
What is the L.C.M. of 9 and 27? Also the G.C.F. of 9 and 27?
asked on December 11, 2008 
English
Can you help me edit this thesis statement? During the postmodern literary period C.S. Lewis illumines his newfound religious faith during war in the religious allegorical fantasy "The Lion, the Witch and the Wardrobe>."
asked on February 13, 2008 
UOP RES 342
Use the numerical data from one of the data sets provided. · Develop one business research question from which you will formulate a research hypothesis that will test two or more populations. · Prepare a 250 word paper describing the results of a
asked on July 15, 2012 
yr8 geography
my homework assignment is to colour the tributary of the river tees but i am struggling. i don`t know where to colour. please help
asked on February 2, 2009 
calculus
find the xvalues at which f is not continuous. which of the discontinuities are removable? f(x)=1/(x^2+1)
asked on September 11, 2008 
math
If 30 samples of 100 items are tested for nonconformity, and 95 of the 3,000 items are defective, find the upper and lower control limits for a pchart.
asked on August 31, 2013 
english
What are the adjectives in each of the following: 1. A quarter will not buy very much. 2. Do you need any food for the party?
asked on October 28, 2009 
algebra 3
identify the greatest common factor then factor expression x^2+9x+47
asked on August 13, 2013 
science
which chromosome is breast cancer located on?
asked on January 30, 2011

English
the answer is “the setting”
posted on October 14, 2019 
Math 2
15
posted on September 23, 2019 
spanish
1. jugador 2. bucear 3. equipo 4. ciclismo 5. pasear 6. tenis
posted on April 2, 2019 
Science
Hurricanes become more powerful by sucking up heat energy from the warm water, and this creates moisture in the air.
posted on March 13, 2019 
science
For collar impulse I would say light into heat into kinetic into electrical
posted on October 1, 2018 
LA
its b
posted on November 18, 2017 
physics
number 4 is wrong
posted on October 3, 2017 
riddle
it's NEWS coz once you hear it it was new but it has became old.. Soo if you hear in the next 30 seconds it will be old already... So it's new and old at the same time
posted on March 3, 2017 
SS
i need help plz help me before i get held back
posted on December 13, 2016