Sunday

January 22, 2017
Total # Posts: 161

**mathematics**

given the mirror formula 1/f=1/v-1/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

*December 23, 2016*

**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?

*October 26, 2016*

**Chemistry**

HCl(aq) + LiOH(aq)--> H2O(l) + LiCl(aq) Did I do this right? I need help on finding the net ionic equation

*October 24, 2016*

**Life orientation**

Physical,social and economic concequences of fraud and corruption

*April 23, 2016*

**life orientation**

Evaluate the physical,social and economic consequences of this crime to the offender.how did this corruption and fraud impact negatively in the country

*April 12, 2016*

**life orientation**

A newspaper article to warn people against engaging in fraud and corruption

*April 12, 2016*

**Science**

Bob I'm sorry, the heat is 0.840J

*March 16, 2016*

**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 never get one ...

*March 16, 2016*

**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?

*October 5, 2015*

**SS**

i need help plz help me before i get held back

*April 20, 2015*

**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 altitude of 700 m. At the...

*October 7, 2014*

**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.

*February 15, 2014*

**Digital Footprint Safety ~CHECK MY ANSWERS~**

the second answer is b.) cookies that track it online habits ik this because I just took a test and got it wrong because of this webpage 😂

*February 11, 2014*

**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 of HBr: 5)after ...

*February 6, 2014*

**everest**

What number is 45% of 680

*November 12, 2013*

**math**

B independent

*September 21, 2013*

**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 new wave hard rock was ...

*September 21, 2013*

**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 distributed)

*September 14, 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 + tT + qQ, where k, ...

*September 7, 2013*

**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.

*August 31, 2013*

**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 p-chart.

*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 that is 30 years old ...

*August 25, 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 obtaining a total of ...

*August 18, 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 obtaining a total of...

*August 17, 2013*

**Math**

Liked your answer, did not see it the first time, thanks!

*August 17, 2013*

**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 obtaining a total of 5...

*August 17, 2013*

**algebra 3**

identify the greatest common factor then factor expression x^2+9x+47

*August 13, 2013*

**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 ...

*June 9, 2013*

**algebra**

If the opposite of x is -x, then their sum is 0, however, if the opposite of x is 1/x, then their sum is (x+1)/x

*April 23, 2013*

**Social Stuides**

wat?

*April 23, 2013*

**Social Stuides**

The People's Party grew out of a response to falling cotton & wheat prices in the South & trans-Mississippi West. The Farmers' Alliance, formed in TX in 1876, promoted collective economic action by farmers.

*April 23, 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

*April 23, 2013*

**physics**

Electric field at a distance r from a charge q is given by Coulomb's law: E = k q / r^2 To get the E-field, you have to add the contribution of 3 charges: E1 = k q1 / r1^2 E2 = k q2 / r2^2 E3 = k q3 / r3^2 You can look at the geometry and so simple addition and subtraction...

*April 23, 2013*

**CHEMISTRY**

Basically, when BaSO4 dissolves in water, it dissociates into the ions Ba^+2 and SO4^-2. The solubility product constant expression then becomes as follows: Ksp=[Ba^+2][SO4^-2] You already know that the Ksp for BaSO4 is 1.1x10^-10. This means that BaSO4, when it dissociates, ...

*April 7, 2013*

**maths**

Given the the instantaneous voltage across a capacitor is VC=40(1-e -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

*March 22, 2013*

**statistics**

94.5 5.5 1.6 44.5 68 50

*March 20, 2013*

**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 3:00am

*January 18, 2013*

**physics**

-1184.615385

*October 6, 2012*

**chemistry**

How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?

*September 27, 2012*

**chemistry**

How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?

*September 27, 2012*

**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.

*September 26, 2012*

**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 hypothesis test ...

*July 15, 2012*

**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 the acceleration...

*June 1, 2012*

**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 is condensed, cooled...

*April 16, 2012*

**Medical Coding 2**

In question 2 we are looking for 3 diagnosis codes, 5 E codes, and 2 CPT codes. I have 3 out of 5 e codes. any help would be greatly appreciated.

*February 8, 2012*

**PHYSICAL SCIENCE PLEASE HELP REALLY APPRECIATE IT!**

Thank You So Much! ^_^

*December 14, 2011*

**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 ^_^

*December 14, 2011*

**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 acceleration of the block as...

*November 18, 2011*

**Grammar**

Actually, #1,#2, and #4 are correct. Just took this test a few minutes ago...

*November 8, 2011*

**Grammar**

Actually #2 is correct. Just took this y test.

*November 8, 2011*

**algebra 1**

N decreased by 12 is greater than or equal to 11?

*October 19, 2011*

**algebra 1**

N decreased by 12 is greater than or equal to 11?

*October 19, 2011*

**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?

*October 3, 2011*

**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?

*September 11, 2011*

**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?

*July 25, 2011*

**Chemistry**

Identify the acid or base behavior of each substance in this reaction: H2PO4 + H2O <----> H3O+ + HPO4-

*May 11, 2011*

**Chemistry**

Show that the pH of a solution is -0.301 when its hydronium-ion concentration equals 2 M. Is the solution acidic or basic?

*May 10, 2011*

**Ethics**

what measurements do sociologists utilize to calculate prejudice

*May 1, 2011*

**trig**

solve each equation for 0 less than or equal to x greater than 2ð. cot²x-cscx=1 thanks:) step by step please :)

*March 9, 2011*

**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?

*February 27, 2011*

**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?

*February 27, 2011*

**science**

which chromosome is breast cancer located on?

*January 30, 2011*

**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 equation? 4H + O₂...

*January 15, 2011*

**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 1000ml (1L) is ...

*January 15, 2011*

**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?

*December 30, 2010*

**10th grade**

48

*October 17, 2010*

**algebra**

Is the relation y> the absolute value of x+3 a function? Why?

*September 25, 2010*

**math**

TUESDAY

*June 21, 2010*

**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.

*June 2, 2010*

**arithmetic**

cross sectional area*length

*May 19, 2010*

**math**

The height, in feet, of a free-falling 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 on the ground?

*May 16, 2010*

**arithmetic**

1/4*3=3/4

*May 7, 2010*

**reading**

What is an appositive?

*April 22, 2010*

**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?

*April 18, 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?

*April 15, 2010*

**math**

the answer is 12

*April 15, 2010*

**Arithmetic**

1 litre per bottle

*April 12, 2010*

**chemistry**

The Burning MG in CO2 reaaction had deltaG=-746 kJ/mol at 298K. Calculate the equilibrium constant for this reaction.

*March 6, 2010*

**arithmetic**

1/4

*February 22, 2010*

**HCA/220**

need help writing a soap note with five medical words out of chapters 6,7,8

*February 16, 2010*

**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.

*February 11, 2010*

**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?

*January 17, 2010*

**Investigation**

Conduction, convection, or radiation? The heat you feel from a fireplace

*January 11, 2010*

**arithmetic**

3/8

*December 9, 2009*

**spanish**

How do i say i don't like history?

*November 19, 2009*

**arithmetic**

20

*November 16, 2009*

**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?

*October 28, 2009*

**arithmetic**

2.911

*October 8, 2009*

**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?

*October 5, 2009*

**arithmetic**

Steves mom is 47 and Steve is 18

*September 30, 2009*

**Math**

first number is 910/39,the second one is 3601/13and the third one is 2/3

*September 24, 2009*

**arithmetic**

7/16

*September 22, 2009*

**arithmetic**

1.423760 2.4 years

*May 6, 2009*

**arithmetic**

423760

*May 6, 2009*

**Art history**

what are the major connections between the ashcan schools ethics and todays documentary photogrphers such as nan godin and corrine day?

*February 2, 2009*