Wednesday

May 4, 2016
Total # Posts: 1,216

**Chem**

What is the pH of a 0.115 mol/L solution of sodium acetate, CH3COONa, at 25oC? (pKa=4.74 at 25oC for CH3COOH.)
*April 3, 2016*

**physics**

Assuming that the equation Ephoton, final = Ephoton, initial/1 + Ephoton, initial/mec2 (1 − cos θ) can be approximately applied at all scattering angles θ, what is the minimum energy of a scattered X-ray photon if the incident X-ray energy is 76 keV? What is ...
*March 21, 2016*

**Networks, Matrices, Linear equations.**

Thanks Damon, I think I was over complicating things!
*March 6, 2016*

**Networks, Matrices, Linear equations.**

x y A(0.2 0.8)3000 B(0.5 0.5)2000 C(0.7 0.3)5000 Where A, B, C are countries, and x and y are resorts. The Matrix represents the percent of visitors. I need to use this matrix which I have worked out to find the number of visitors who visit X (X and Y are resorts) in a given ...
*March 6, 2016*

**math**

Christa is standing on the top of head of gladwyn's shadow. If christa is 5 ft tall and Gladwyn's height is 6 feet and the length of their shadows combined is 15 ft, find the length of Christa's shadow
*February 29, 2016*

**Chemistry (balancing equations)**

Balanced Equation: 2 CuNo3 + MgCl2 ---> 2 CuCl + MgNO3 Is this correct?
*February 23, 2016*

**geometry**

A triangle is made of wood sticks of lengths 8, 15 and 17 inches joined end-to-end. Pieces of the same integral length are cut from each of the sticks so that the three remaining pieces can no longer form a triangle. How many inches are in the length of the smallest piece that...
*January 28, 2016*

**Child Development**

Thanks I done that but I am not having in lucky.
*January 28, 2016*

**Child Development**

I need help with find three websites that help families understand how young children develop and learn. Web sites must contain articles that help families understand the development and learning of 3 to 5 years old.
*January 28, 2016*

**Conversions**

Convert the temperature 1.49677×109 ◦C to Kelvin (correct to 3 significant digits). Answer in units of K.
*January 3, 2016*

**Conversions?**

A diamond weighs 5.61 ounces. How much is it worth if the going price of diamonds is 673 dollars per carat? 1 carat is equal to 200 milligrams.
*January 3, 2016*

**physics**

four particles of masses 1kg, 2kg,3kg, and 4kg are at vertices of a rectangle of sides a and b.if a=1m and b=2m find the location of the center of mass
*November 29, 2015*

**Physics**

Find the pressure at the bottom of a swimming pool that is 1.1 m deep.
*November 19, 2015*

**Geometry**

Triangle KLM has vertices K (3,2) L(-1,5) and M(-3,-7) write the angles in order from the least to greatest measure show all work
*November 11, 2015*

**Geometry**

Triangle LM has vertices K(3,2) L(-1,5) and M(-3,-7) Write the angles in order from the least to greatest measure
*November 11, 2015*

**Math**

Thanks anyways
*November 9, 2015*

**Math**

My teacher said this question can be answered
*November 9, 2015*

**Math**

we are not given his speed. He is expressed as "x". and the 1st friend is 2+x and the second is 1-x
*November 9, 2015*

**Math **

Jamal has two friends that will join him on a walkathon. One of his friend has been training and can walk 2km/hr faster than Jamal. The other friend can walk 1km/hr slower than Jamal, create an algebraic model to determine the total time it will take the 3 friends to complete ...
*November 9, 2015*

**Physics**

Two trucks that look the same collide. One was originally at rest. The trucks stick together and move off at more than half the original speed of the moving truck. What can you say about the contents of the two trucks?
*November 4, 2015*

**Math**

Nevermind I get it now thank you!
*October 23, 2015*

**Math**

What do i do when I have the 5 equation do I use elimination or substitution to find the value of a,b,c,d,e ?
*October 23, 2015*

**Math **

How do you find the unknowns for a quartic function : f(x) =ax^4+bx^3+cx^2+dx+e Given the table of values. Determine a,b, c, d and e. x |y 0 0 1 0 2 1 3 3 4 6 5 10 6 15 7 21
*October 23, 2015*

**Math**

How do you calculate the local minimum and maximum points using instantaneous rate. The difference quotient: g(x+h)-g(x)/h
*October 23, 2015*

**Math**

determining minimums and maximums Approximate the local minimum points and local maximum point of the function g(x)= x^4-5x^3+ 7x^2-3x -5 using that the slope of a tangent line at these points is zero/
*October 23, 2015*

**Children Development**

1. Gardner's theory of intelligence suggests that one general factor of intelligence exists. A.does not address the issue of the development of intelligence. B.suggests that schools should foster only linguistic and logical/mathematical intelligences. C.suggests that ...
*October 23, 2015*

**Media Project**

I need help with finding the positives and negatives of using snapchat.
*October 22, 2015*

**Children Development**

In what ways have factors from Microsystems outside the family, from the mesosystem, and the exosystem possibly influenced your child’s development at ages 6, 8 and 10? Find four examples of such influences and make clear why you believe they should be categorized at the ...
*October 22, 2015*

**Children Development**

I don't need help.
*October 11, 2015*

**Children Development**

Describe three specific examples of changes in your child’s behavior at age 4 that seem to stem from growth in cognitive and language ability since the period of infancy Would it be something like this? The first example is Nettie behavior at public place, When Nettie was...
*October 11, 2015*

**Children Development**

The first example is Nettie behavior at public place, When Nettie was younger she not able to sit still or stay quiet while being at a restaurant. As Nettie got older her behavior in restaurants improve. Since Nettie is now older she knows what type of behavior that my partner...
*October 10, 2015*

**Children Development**

Describe three specific examples of changes in your child’s behavior at age 4 that seem to stem from growth in cognitive and language ability since the period of infancy What does this question mean?
*October 10, 2015*

**School**

When given three given kinds of meat, three kind of cheese, and three kinds of bread of bread. Lisa can make 27 kinds of sandwich. I cannot figure out what piaget stage this is?
*October 9, 2015*

**Case Study**

Thanks for the help. I do know what the word means.
*September 29, 2015*

**Case Study**

Darlene's parents believe that her extra weight is baby fat and aren't concerned about it. What are some of the physical and social consequences of obesity that darlene may experience? What does these question mean?
*September 29, 2015*

**math**

if a ladder 15 meters long is placed so as to reach the bottom of a window 10 meters high, what distance on the ground does the ladder adjusted if it is placed on the top of a two meter square window and what is the new angle of elevation of the top of the window with respect ...
*September 13, 2015*

**Pregnancy**

So would I just list the other side in 3 trimesters and what happens?
*September 13, 2015*

**Pregnancy**

Thanks so on my paper on the prenatal development time line would I write 9 weeks differentiation of ovaries and testes.
*September 13, 2015*

**Pregnancy**

Should could you do example so I have better understanding?
*September 13, 2015*

**Pregnancy**

I am having a hard time understanding my directions. Below are two times lines that represent prenatal development and pregnancy. On the prenatal development time line, indicate the timing(in weeks)of the three stages of prenatal development and the major development phenomona...
*September 13, 2015*

**Biology**

My mom was average height and my dad was short and mine short. I am think my genotype is heterozgous. My mom weight is average and my dad was overweight and my was average. I am think my genotype is homozygous.
*September 12, 2015*

**Biology**

My hair color is blonde and so is my parents.What is my genotype?
*September 12, 2015*

**Children Development**

Thanks Mrs.Sue should this be include in my answer?
*September 12, 2015*

**Children Development**

Thanks Mrs.Sue Would this been some of children exploring and problem solving behavior for this 10 months Nettie enjoys throwing every toy out of her crib and watching what happens. Nettie seems to expect you to keep putting them back Nettie is able to imitate new words and ...
*September 12, 2015*

**Children Development**

Describe and give examples of changes in your child’s exploratory or problem solving Behavior from 8 through 18 months and categorize them according to Piagetian and Information processing theories. What does this question mean?
*September 12, 2015*

**Biology**

My mom has eye color hazel and my dad has the eye blue and my eye color is blue. Would my Genotype be homozgous? My mom hair has blonde and my dad has blonde hair and I have blonde hair would my genotype be heterozgyous? Biology - woody, Friday, Se
*September 11, 2015*

**Biology**

My mom has eye color hazel and my dad has the eye blue and my eye color is blue. Would my Genotype be homozgous? My mom hair has blonde and my dad has blonde hair and I have blonde hair would my genotype be heterozgyous?
*September 11, 2015*

**math**

Marcus bought r movie posters for $5 each. Write an algebraic expression for total amount Marcus spent.
*September 5, 2015*

**physics**

What is the variable and unit for centripetal force and centripetal acceleration?
*July 15, 2015*

**Amplifiers**

(TCO 3) For a common source FET amplifier, gm = 1,600 ms and RD = 3.5 k. The voltage gain (AV) is _____. 8.5 6 5.6 None of the above
*June 23, 2015*

**Math**

how many different ways can 8 people be seated in 3 chairs
*June 2, 2015*

**Math**

Which system has an infinite number of solutions? A.{x+2=y 4=2y-x B.{2y+6=4x -3=y-2x C.{y+3=2x 4x=2y-3 D.{y=2x-5 -2=y-2x Is it B
*May 30, 2015*

**Math**

Patton is organizing his stamp collection into ab ook. He has 42 foreign stamps and 70 US stamps. He wants every page to have the same number of foreign stamps and the same number of US stamps. If he puts the greatest number of stamps on each page, how many pages will he use? ...
*May 30, 2015*

**Math**

Which equation has the same slope as y=4x-5 A.4x-2y=0 B.3y-12x=21 C.y=5x+7 D.5y=4x-6
*May 30, 2015*

**Math**

Y=3x and Y=1/3x Is this perpendicular?
*May 30, 2015*

**Math**

how to determine if something is a function besides the statement "x's cannot repeat"
*May 30, 2015*

**Algebra**

Simplify √1/5 - √5
*May 21, 2015*

**Algebra**

Thank you
*May 21, 2015*

**Algebra**

Find the perimeter and area of a rectangle with a width of 2√7 - 2√5 and a length of 3√7 + 3√5
*May 21, 2015*

**Science**

How could sustainable use preserve biodiversity in hot spots?
*May 18, 2015*

**Math**

√216t + √96t
*May 18, 2015*

**Math**

Consider the following equation: A=(s+1)^2. This equation can also be written as ____.
*May 12, 2015*

**Math**

answer choice: a.) 4 b.) 5 c.) 7 d.) 2
*May 12, 2015*

**Math**

twice the square of a positive number increased by three times the number is 14. find the number
*May 12, 2015*

**Math**

How to simplify this expression √3b^2 / 27b^4
*May 11, 2015*

**Science**

1.how do plants grow when light comes from one side only? Why might plants respond to light this way? 2. What is a circadian rhythm? 3.What controls the change in leaves from night to day? 4.what might the plant leaves change from night to day?
*May 7, 2015*

**Math discussion**

If the data collected are correctly input, meteorologists predications could be accurate.
*May 7, 2015*

**Math discussion **

As part of their job, meteorologists use data to make weather predications. How accurate are their predications? What are other scenarios in which you would use to data to make a predication? How would you defend your predication using data?
*May 7, 2015*

**Physics**

Suppose you're an astronaut and you're sitting in a 6000kg space capsule riding on a 4000 m x 8000 m sail (whose mass is included in the 6000 kg). You're orbiting in the vicinity of a distant bright hot star giving off light with an intensity 8 x 10^9 W/m^2 at a ...
*May 7, 2015*

**Physics**

Suppose two conducting wires each of mass 25g and length 40m are both hanging from a support beam. When the circuit is turned on, the wires repel each other so that the angle between the supporting strings is 30 degrees at a height 5cm below the support beam. A. Are the ...
*May 7, 2015*

**Physics **

Suppose a light wave is in the visible spectrum, with frequency 740 THz(which will have a deep purple color). What will be the ratio of the electric to magnetic fields constitute the light wave? What fraction of the total energy is conveyed by the electric field?
*May 7, 2015*

**Physics**

Suppose two charged conducting wires each have current I, and they're placed parallel to each other. Fins the line charge density that needs to be placed on each wire so that the electric repulsion between them balances the magnetostatic force so that they are in equilibrium.
*May 7, 2015*

**Physics**

Suppose a 7kg bob is hanging from the ceiling in a region with uniform electric field E= 46x + 29y N/C. Find the charge on the bob if it's angular position is displaced from the vertical by 20 degrees.
*May 7, 2015*

**Physics**

In an AC circuit with a frequency 25 Hz producing an rms voltage of 30 V and a 20 farad capacitor, what is the end current?
*May 6, 2015*

**Physics**

In an ac circuit with frequency 25 Hz producing an rms voltage of 30 V and a 30 Henry inductor, what is the rms current going through the inductor?
*May 6, 2015*

**Math**

Sorry, that's what it asked me on my review so I just retyped what it said.
*May 5, 2015*

**Math**

What does a and c stand for in the quadratic function Ax^2+bx+c
*May 5, 2015*

**math**

A wall in Marcus's bedroom is 8 2/5 feet high and 18 1/3 feet long. If he paints 1/2 of the wall blue
*May 3, 2015*

**Science**

why might an ecologist use a food chain for one study and a food web for another study
*April 30, 2015*

**Math**

Perry's Publishing is relocating and 2 employees, Edna and Sam have created a "For sale" sign 4 feet long to place outside the current premises. They plant o attach the sign to a 9-foot pole using a hook and a chain. They would like the top of the sign to be 6 ...
*April 29, 2015*

**English **

I am doing a research are you suppose to write numbers out of words in the paper?
*April 28, 2015*

**phsyics**

A long string is wrapped around a 6.4-cm-diameter cylinder, initially at rest, that is free to rotate on an axle. The string is then pulled with a constant acceleration of 2.0m/s2 until 1.5m of string has been unwound. If the string unwinds without slipping, what is the ...
*April 22, 2015*

**Math**

A frequency, F, varies inversely as wavelength, w. The constant of variation is speed, S. Write a formula to express this relationship
*April 16, 2015*

**Math**

Rate varies inversely as time. Sandy rode her bicycle to Micah's house at a rate of 5 mi/h. She returned home at a rate of 4 mi/h. If the first leg of the trip took 20 minutes how long did the second leg of the trip take
*April 16, 2015*

**Math**

The mass of a given object varies inversely as the acceleration of the object. A cart with a mass of 40 g has an accelerationo 2.5 m/s^2. What is the acceleration of a 50 g cart?
*April 16, 2015*

**Math**

During normal breathing, about 12% of the air in the lungs is replaced after one breath. Write an exponential decay model for the amount of the original air left in the lungs if the initial amount of air in the lungs is 500 mL. How much of the original air is present after 240...
*April 16, 2015*

**Math**

Bacteria can multiply at an alarming rate when each bacteria splits into two new cells, thus doubling. If we start with only bacteria which can double every hour, how many bacteria will we have by the end of the day?
*April 16, 2015*

**Math**

6438.64
*April 16, 2015*

**Math**

The population of Winnemucca Nevada can be modeled by P=6191(1.04)^t where t is the number of years since 1990. What was the population in 1990? By what percent did the population increase by each year?
*April 16, 2015*

**Math**

The time it takes to complete a given trip varies inversely as the speed traveled. If it takes Tim 10 hours tro travel from Cleveland to Albany at 42 mi/h, how long will it take him to make the trip at 60 mi/h?
*April 15, 2015*

**Math**

Thanks
*April 15, 2015*

**Math**

Oh right, thanks. So it would be 13/54 and x/65
*April 15, 2015*

**Math**

Time varies inversely as the rate of travel. If Jennifer drove 13 hours at an average rate of 54 miles per hour, how long would thr trip take at a rate of 65 miles per hour
*April 15, 2015*

**Math**

Thank you
*April 15, 2015*

**Math**

Mass, m, is varies inversely as acceleration, a. The constant of variation is force,f. Write an equation to express this relationship.
*April 15, 2015*

**Math**

The variable y varies inversely as x : y is 1 2/3 when x is -3/5. Find y when x is 3/7
*April 15, 2015*

**Math**

So how would you set up the equation
*April 15, 2015*

**Math**

I somehow typed 12 because I saw a 4 and 3
*April 15, 2015*

**Math**

The time it takes to clean the house varies inversely with the number of people cleaning. If it takes 1 person 4 hours to clean the house, how long will it take 3 people? 12 hours
*April 15, 2015*