Monday

August 3, 2015

August 3, 2015

Total # Posts: 1,275

**Physics**

In a Young's double-slit experiment, the slits are 1mm apart and are illuminated by laser light of wavelength 681.8nm. The screen is 3.9m away. What is the number of dark fringes per centimetre?
*July 14, 2015*

**System of Equation**

Elimination and substitution
*June 18, 2015*

**System of Equation**

___________ involves isolating the variable in one equation and replacing the same variable in the other equation with this expression.
*June 18, 2015*

**alegbra2**

the April 2015 earthquake in Nepal measured 7.8 in magnitude.in 1988 there was an earthquake in the same area that measured 6.3 on the richter scale. how many times greater was the most recent earthquake than the one in 1988?
*June 1, 2015*

**alegbra2**

Sian and Daniel are researching information on earthquakes in the U.S. One of the largest was centered in San Francisco in 1906. It measured 7.8 on the richter scale. a. find the amount of engr. released by the earthquake. b. Sian says the amount of energy released was 3.16 x ...
*June 1, 2015*

**alegra2**

the number of wolf in yosemite park has increased at an annual rate of 10% since 2005 and there were 1.35 thousand at that time. a. write a function to model the number of wolves after t years. b. approximately how many years are now living in the park(2015)?
*May 31, 2015*

**chemistry- titration**

Once you have calculated your Ka value, use the data to find the concentration of the unknown acids. Vol. of acid solution=25mL concentration of NaOH used = 1M Buffer (pH) = 8.35 at 11.5mL 1/2 11.5=5.75mL which is a pH of 3.58 I did pH=pKa + log(acid/base) to find the pKa pH=...
*May 27, 2015*

**Chemistry**

I still do not understand
*May 25, 2015*

**Chemistry**

Determine the pH of a buffer made from 250 ml of 0.50M HF and 150 ml of 0.75 M NaF.
*May 25, 2015*

**The Giver**

Thanks so much! And I'm stuck on #1 but I'll try again so D or B?
*May 22, 2015*

**The Giver**

Ok..On lesson 6 unit 4..I'm not sure if my answers are correct but on #1 I think C..on #2 I think C and on #3 I think D..If you know what I'm talking about lol
*May 22, 2015*

**The Giver**

Rock..wait you can help?
*May 22, 2015*

**The Giver**

Can I give you my answers on lesson 6 unit 4 and can u check them please?
*May 22, 2015*

**The Giver**

Thanks :)
*May 22, 2015*

**The Giver**

Ok Maybe A? The reason I say A is because hes talking about himself..
*May 22, 2015*

**The Giver**

Read the paragraph from the Novel The Giver. With the chant, Jonas Knew, the community was accepting him and his new role, giving him life, the way they had given it to the newchild Caleb. His heart swelled with gratitude and pride. But at the same time, he was filled with ...
*May 22, 2015*

**The Giver**

Thanks so much :)
*May 22, 2015*

**The Giver**

Ms. Sue I just needed help like everyone else on this site does..
*May 22, 2015*

**The Giver**

Yes I am :) btw on number 11 what character role is the question talking about because I'm confused.
*May 22, 2015*

**The Giver**

Thanks so much :D
*May 22, 2015*

**The Giver**

Thanks so much ellie do you mind helping with number 10 on the test? :)
*May 22, 2015*

**The Giver**

Which of the following events greatly impacts the plot in chapter 7? A. Fiona is given the important assignment of caretaker of the old B. All new children are given names and assigned to family units C. A replacement child is given to a family whose child was previously ...
*May 22, 2015*

**Social Studies Help!**

Thanks Ms sue :)
*May 21, 2015*

**Social Studies Help!**

Who was the governor of Georgia who died prior to the three governors controversy? A. Ellis Arnall B. Herman Talmadge C. Eugene Talmadge** D. Jimmy Carter I think C but then I think D can anyone help me please I'm confused?
*May 21, 2015*

**chemistry 20 **

A student mixed a solution of aqueous calcium chloride with an aqueous solution of magnesium sulphate. A precipitate formed. 1) Write the balance chemical equation for the reaction including states of matter. Ensure you write the reactants as a dissociated ions. 2) Based on ...
*May 11, 2015*

**Math**

There are 25 computers in a math lab. There are 6 activity booklet for very 2 computers in the math lab. How many activity booklets are in the math lab?
*May 7, 2015*

**Math**

Thank you!
*May 6, 2015*

**Math**

That's exactly how it's written on my homework page.
*May 6, 2015*

**Math**

As part of a pancake recipe, you mix 3/4 cup of milk for every 1 cup of flour to make 7 cups of batter. How much of each ingredient do you use?
*May 6, 2015*

**Social Studies**

Why did the United States enter World War 1? A. It did not agree with British politics. B. It wanted land in Europe. C. It was attacked by Japan.*** D. It wanted the economic opportunities that the war could bring.
*May 6, 2015*

**Physics**

we have an unknown mass of water at an initial temp of 35 degrees C and 100 g ice cube at -5 degrees, the final temp is 5 degrees. What is the mass of the water? Specific heat of ice is 2100 j/(kg*k) latent heat of fusion of ice is 333.7 kj/kg
*May 5, 2015*

**Physics**

Not sure what formula to use.. im given the molar mass of a molecule the temperature it's at and the distance it traveled, and im looking for the time it takes to travel that distance
*May 5, 2015*

**Math**

The scores of 10 students on their midterm exam (x) and on their final (y) yielded the following data. Σx = 638 Σx2 = 43,572 Σy = 690 Σy2 = 49,014 Σxy = 44,636
*May 1, 2015*

**ninny by anton chekhov **

1. How do both employers first cheat their governess? A. The employers say they mad a note of the fact that the pay is 30 rubbles a month and not 40 *** B. The employers indicate that an agreement was made about losing pay for holidays C. The employers decide to deduct rubles...
*April 29, 2015*

**Math**

I didn't know that thanks though :(
*April 28, 2015*

**Math**

Its not letting me post the link :(
*April 28, 2015*

**Math**

Use the graph below to answer the following question. I'll post the link to the graph below. Find the slope. A. 2 B. -1/2 C. -2 D. 1/2 Honestly I'm horrible at Math so I can't really pick a answer can someone please help me? Please explain to me how to work this ...
*April 28, 2015*

**Social Studies**

I need to know ASAP!
*April 28, 2015*

**Social Studies**

Which of the following is not an example of resistance to change in the 1920s? (Choose All That reply) A. The KKK targeted more than just African Americans with its ideas of everyone's ''proper place'' in society. B. Racial segregation continued in the ...
*April 28, 2015*

**Social Studies**

Thanks so much Ms. Sue :)
*April 28, 2015*

**Social Studies**

So its D?
*April 28, 2015*

**Social Studies**

Mrs. Sue this is what the text says... Railroads, automobiles, and airplanes are all forms of transportation and technology that emerged or improved in the 1920s. Automobiles, such as the one pictured, were made by an assembly line, which is a series of stations of workers, ...
*April 28, 2015*

**Social Studies**

Which of the following was a change made to transportation during the 1920s? A. Airplanes were invented and used for the first time. B. Railroads were introduced, making it easier to ship goods. *** C. The first canals between waterways were built. D. Installment plans offered...
*April 28, 2015*

**Math**

I need help with sequences 2,1,1/2,1/4,... Is this arithmetic, geometric,neither, or both (geometric?) 7,9,11,13 arithmetic, geometric,neither, or both. (arithmetic?) 1,2,4,8... Whats the rule think the rule is: Start with one and multiply by two repeatedly 50,40,30,20 Rule ...
*April 24, 2015*

**Math**

Thank you both so much: GanonTEK and Ms.Sue. :)
*April 10, 2015*

**Math**

What is the least common multiple of 8 and 12? PLEASE SHOW YOUR WORK IF POSSIBLE!
*April 10, 2015*

**Art**

no...I'm just confused with this question
*April 8, 2015*

**Art**

Omg I said B what is wrong with me lol I didn't mean to say B. I meant to click A! Is A correct?
*April 8, 2015*

**Art **

Prior to the arrival of the Spanish, Native Americans would likely have chosen which material with which to weave their blankets? A. Oat Wool B. Silk C. Sheep Wool D. Cotton Honestly I don't know but I'll go with B or C?
*April 8, 2015*

**Art**

Thanks :)
*April 8, 2015*

**Art **

Which technique do native Americans use to form patterned blankets? A. Embroidery B. Weaving*** C. Stitchery D. applique
*April 8, 2015*

**check my answers please**

Yes it helped me a lot :)
*April 7, 2015*

**check my answers please**

Thanks so much reed :)
*April 7, 2015*

**check my answers please**

That is how my teacher has my question written and I didn't think it was written correctly either so I just chose the best answer.
*April 7, 2015*

**check my answers please**

My teacher needs a answer though what should I put?
*April 7, 2015*

**check my answers please**

So I'm incorrect? And stanza is the lines in the poem?!?!?
*April 7, 2015*

**check my answers please**

I'm sorry I'll do that next time and thanks :)
*April 7, 2015*

**check my answers please**

"President Lincoln’s Declaration of Emancipation, January 1, 1863" by Frances E. W. Harper 1 It shall flash through coming ages, 2 It shall light the distant years; 3 And eyes now dim with sorrow 4 Shall be brighter through their tears. 5 It shall flush the ...
*April 7, 2015*

**Math**

1) What is the mean of the set of the following data? 9,7,14,11,14,15,14 A)12 B)13 C)14 D)15 2)What is the median of the following data set? 9,7,14,11,14,15,14 A)7 B)9 C)11 D)14
*April 3, 2015*

**Math**

Describe how to find the range of a set of data.
*April 3, 2015*

**science**

I have a science experiment and I'm not sure how to do this or have all the materials to do it can anyone help? For this portfolio, you will design an experiment to investigate the relationship between the number of coil loops and a strength of a solenoid. Once you have an...
*April 3, 2015*

**Physics**

A charged capacitor, C = 40 micro F, is connected to a resistor, 120 ohms. How much time will elapse until the voltage falls to 25% of its original (max) value? im not even sure what equation to use for this, so if someone could help me to figure that out it wou ld be greatly ...
*March 30, 2015*

**Art **

Which task is typical for a fashion designer? A. designing a storyboard B. researching new trends*** C. organizing an exhibition D. creating an blueprint I think B but part of me wants to say C?
*March 30, 2015*

**art**

Thanks :)
*March 30, 2015*

**art**

no and ok sorry
*March 30, 2015*

**art **

Patterns and colors on seventeenth to nineteenth century kimonos were used to identify the hometown of which type of Japanese citizen? A. Farmers B. Nobility C. Warriors*** D. Lawmakers I'm not sure can someone help?
*March 30, 2015*

**S.S**

Why do the United States and Canada cooperate on environmental problems? Thank You sooooooo much for your help! I really appreciate it! :)
*March 10, 2015*

**S.S**

Thank you sooooooooooooooooooooooooooo much Ms. Sue! You always find away to help people and to teach them as well. Once again, thank ou soooooooooooooooooooooooo MUCH!
*March 10, 2015*

**S.S**

Thank you for the response to my other question. Could it be: B. A world power
*March 10, 2015*

**S.S**

I'm no so sure,Ms. Sue, but I think a possible answer (maybe) could be D. Involved in the War 1812 Why do the United States and Canada cooperate on environmental problems?
*March 10, 2015*

**S.S**

Canada's help in the World War 1 victory helped Canada become... A. A British Colony B. A World Power C. A French Colony D. Involved in the War of 1812 Thank You Soooo much for helping! I Really Appreciate your help! :)
*March 10, 2015*

**Chemistry 30 **

A mass of 45.0g of molten silver at its melting point is poured into 750mL of calorimeter water at 25.0C. The final temperature reached by both is 30.0C. If the specific heat capacity of silver is 0.235 kJ/kgC, calculate the molar heat of solidification of silver.
*March 8, 2015*

**Chemistry**

Still don't understand this! Please help!
*February 25, 2015*

**Chemistry **

a 100 g sample of ice at -15 degrees celsius is heated until it is converted to water vapour at 120 degrees celsius what is the energy change?
*February 25, 2015*

**Math Check**

Hi! Can someone check this for me? Thanks! Question: Determine if v and w are equal If v = Ray AB and w = Ray CD, where A (23, 11), B (10, 15), C (13, 15), and D (0, 11. (True or False) My answer: False
*February 24, 2015*

**Math Work**

I know that I'm using the Law of Cosines, but I'm confused on how to solve. I have to also round my answers to the nearest tenth for degrees and to the nearest hundredth for sides Given: A= 55 degrees b=3 c=10 Find: a= B= C=
*February 24, 2015*

**Finance**

Calculate, to the nearest cent, the future value FV of an investment of $10,000 at the stated interest rate after the stated amount of time. HINT [See Example 1.] 5% per year, compounded daily (assume 365 days/year), after 11 years work:10,000(1+0.05/365)^(365)(11)=17331.87 ...
*February 24, 2015*

**Chemistry**

I honestly have no idea how to do this. Could you show me the first part step by step
*February 19, 2015*

**math**

Davida bought a pair of earrings, each in the shape of an isosceles triangle with equal side lengths of 24 mm and a base length of 16 mm. She used one earring to make another pair of earrings, similar in shape, with the base length equal to 11 mm. What is the length of the ...
*February 9, 2015*

**Math- Calculus**

I need help with these problems, I cannot find a similar example to help me in the book: 1. Find lim x->infinity (e^(-2x) + sin x). 2. Find the derivative of sqrt(9-x) using the limit process. 3. Find lim x-> -infinity (x + sqrt(x^2 + 2x)). 4. Show that the equation e^x...
*February 9, 2015*

**Algebra**

Every sack of sugar has the same weight. Every sack of flour has the same weight, but not necessarily the same as the weight of the sacks of sugar. Suppose that three sacks of sugar together with four sacks of flour weighs no more than 50 pounds, and that the weight of two ...
*February 7, 2015*

**Physics **

An Earth satellite moves in a circular orbit 946 km above Earth's surface with a period of 103.8 min. What are (a) the speed and (b) the magnitude of the centripetal acceleration of the satellite? I got an answer of 7388.897 m/s for part a, but I'm stuck on part b
*February 2, 2015*

**Calculus**

Typo: 1.) Find the equation of the line that is tangent to the graph of y=x^3 at x=1.
*January 25, 2015*

**Calculus**

1.) Find the equation of the line that is tangent to the graph of y-y^3 at x=1. 2.) lim x->0 ((sin x*cos 2x)/3x) 3.) Show, using the squeeze theorem, that the limit of Xe^(sin 1/x) as x->0 is 0.
*January 25, 2015*

**Physics**

How would Ion Propulsion affect the cpst of spaceflight? Or How much does ion thrusters/ ion propulsion cost? I have been googling this for an hour and have yet discovered a answer. Help ??
*January 11, 2015*

**Math (TRIG)**

Please help me set up these problems. 1.) Find an equivalent equation in rectangular coordinates. r(1 - 2 cos θ) = 1 2.) Find a rectangular equation for the plane curve defined by the parametric equations. x = sec t, y = tan 3.) A projectile is fired with an initial ...
*December 8, 2014*

**statistics**

97.82
*December 7, 2014*

**Math check my answer please!**

Which expression is equivalent to 4x4x4x4x4x4x4x4? a. 4 x 8 b. 8^4 c. 8x8 d. 4^8 I think D.
*December 3, 2014*

**calculus, help!**

Evaluate the definite integral: int_{1}^{e^9} \frac{dx}{x \sqrt{\ln x}} = i gt my answer as 1^(e^9) but it's saying it's wrong
*December 1, 2014*

**Calculus**

it saying -8 isn't the number
*December 1, 2014*

**Calculus**

consider the function f(x) = (x if x<1 (1/x if x>or equal to 1 Evaluate the definite integral: int_{-2}^{3} f(x)\,dx =
*December 1, 2014*

**Math**

I was trying to find the Integral of those functions but it's saying that my answer is incorrect
*December 1, 2014*

**Math**

consider the function f(x) = (x if x<1 and 1/x if x>or equal to 1 Evaluate the definite integral: int_{-2}^{3} f(x)\,dx =
*December 1, 2014*

**CHEM**

1.) What is the correct net cell reaction for the electrochemical cell diagramed below? Ni(s) ∣ Ni2+(aq) || Ag+(aq) ∣ Ag(s) a.) Ag+(aq) + Ni(s) ---> Ag(s) + Ni2+(aq) b.) Ag(s) + Ni2+(aq) ---> Ag+(aq) + Ni(s) c.) 2Ag+(aq) + Ni(s) ---> 2 Ag(s) + Ni2+(aq) d...
*November 30, 2014*

**chemistry**

how many moles of Kl are present in 500 ml of a 0.2 M solution?
*November 25, 2014*

**Trig**

Thank you Steve.
*November 23, 2014*

**Trig**

Does this result in no triangle, 1 or 2 triangles? If so, then solve. B= 88 degrees, b= 4 and a=23. I know that A= (sin 88)(23)/(4)= A=5.74 degrees C= 180-5.74-88= C=86.26 degrees c=(sin86.26)(4)/(sin 88)= c=3.99 My question is how do you know if it's 0,1, or 2 triangles. ...
*November 23, 2014*

**Math**

UPDATED, I FIGURED IT OUT.
*November 22, 2014*

**Math**

I also need help with Find the component form of v if absolute value of v=2 and the angle it makes with the x-axis is 30 degrees. I cannot find a book example. help me.
*November 22, 2014*