Wednesday

October 7, 2015
Total # Posts: 1,293

**Physics**

At time t = 0, a hockey puck is sent sliding in the +x direction over a frozen lake, directly into a strong wind. Figure 2-13 gives the velocity v of the puck versus time, as the puck moves along a single axis. (The time axis is marked in increments of 1.0 s.) At t = 10. s, ...
*September 26, 2010*

**Physics**

At time t = 0, a hockey puck is sent sliding in the +x direction over a frozen lake, directly into a strong wind. Figure 2-13 gives the velocity v of the puck versus time, as the puck moves along a single axis. (The time axis is marked in increments of 1.0 s.) At t = 10. s, ...
*September 26, 2010*

**algebra 1**

What is the y-intercept of the graph of y=2^x+2? (0,4)?
*September 24, 2010*

**algebra 1**

Thanks
*September 23, 2010*

**algebra 1**

Is the answer no solution?
*September 23, 2010*

**algebra 1**

Use the Quadratic Formula to solve the equation: 5x^2 - 6x - 8=0 -.51,1.71?
*September 23, 2010*

**algebra 1**

Thank you!
*September 23, 2010*

**algebra 1**

Use the Quadratic Formula to solve the equation: 5x^2 + 9x - 2=0 -2,1/5?
*September 23, 2010*

**algebra 1**

Thanks again!
*September 22, 2010*

**algebra 1**

What is the area of a square with the dimension 1+square root of 3? a.4 b.4+2square root of 3 c.3square root of 3 d.5 B?
*September 22, 2010*

**algebra 1**

Thanks!
*September 22, 2010*

**algebra 1**

Factor the expression: x^2 - x - 42 (x-7)*(x+6)?
*September 22, 2010*

**algebra 1**

Thank you!
*September 22, 2010*

**algebra 1**

Factor the expression: 4n^3 + 8n^2 - 5n - 10 (n+2)(4n^2 - 5)?
*September 22, 2010*

**science**

i got 1.1e54 for the mass of protons required but it said it was wrong
*September 21, 2010*

**science**

What mass of protons would be required to just neutralize the charge of 1.7 g of electrons? I thought it was simple because 1 proton maxes out 1 electron but my teacher started talking abou this complicated way of doing it and i didn't get it :( can someone show me how to ...
*September 21, 2010*

** english**

Well many teachers have different rubrics for how they want their students to do the book report. usualy a book report contains: The Standard Format Introductory Paragraph This paragraph should include the title of the book and name of the author. It will also describe the ...
*September 21, 2010*

**algebra 1**

Thanks, again!
*September 21, 2010*

**algebra 1**

When studying probability, a method used for counting the number of possible outcomes is a ______. a.tree diagram b.dependent event c.relative frequency d.simulation A?
*September 21, 2010*

**algebra 1**

Thank you!
*September 21, 2010*

**algebra 1**

Which statistical method best represents this set of data? 1,2,5,2,3,7,300,5,3,3 a.mean b.median c.mode d.standard deviation I'm pretty sure it's B or C, but they are both the same number.
*September 21, 2010*

**math**

(0.80)+(0.03)=0.83
*September 13, 2010*

**English**

After I rewrite it please comment on it. Thanks for your help. 1)He liked shooting things, hammering things, smashing things and wrestling with his father. 2)Thirsty for knowledge, Joy leapt in his fathers heart for his son who was quick to learn. 3) In the gathering shadows, ...
*September 8, 2010*

**English**

How can I rewrite this? Please. He liked shooting things. (A). and wrestling with his father. (B) hammering things, smashing things. Joy leapt in his fathers heart for his son. (A) thirsty for knowledge (B) Who was quick to learn. They stood. (A) In the gathering shadows (B) ...
*September 8, 2010*

**algebra 1**

Thanks!
*August 30, 2010*

**algebra 1**

P.S. There aren't any brackets.
*August 30, 2010*

**algebra 1**

The y itself has a square root around it. 5+ square root of 2 is divided by 2.
*August 30, 2010*

**algebra 1**

This problem has a fraction in it. Solve: square root of y =(numerator) 5+square root of 2. (Denominator)2 25.5+5square root of 2?
*August 30, 2010*

**algebra 1**

Thank you.
*August 30, 2010*

**algebra 1**

Money in a bank account that compounds interest by some percentage acts______. a. linearly b. exponentially c. negatively d. like a fraction B?
*August 30, 2010*

**Math**

if you are talking about an object, use the water displacement method.
*August 30, 2010*

**math**

" A total of $32000 is invested in two municipal bonds that pay 5.75% and 6.25% simiple interest. The investor wants an annual interest income of $1900 from the investments. What amount should be invested in the 5.75% bond?"
*August 29, 2010*

**algebra 1**

Thank you!
*August 28, 2010*

**algebra 1**

This has a fraction in it. Simplify: numerator is 5 square root of 4 times square root of 8. Denominator is square root of 8 times square root of 2. 5 square root of 2?
*August 28, 2010*

**algebra 1 again**

Thank you for the help!:)
*August 28, 2010*

**algebra 1 again**

Square root of 4 is 2. 2 times 3 is 6. So 6 is the answer?
*August 28, 2010*

**algebra 1 again**

Simplify: 2 square root of 4 + square root of 4. 3 square root of 4?
*August 28, 2010*

**algebra 1**

Thank you again!
*August 28, 2010*

**algebra 1**

Simplify:2 square root of 4 + 2 square root of 8? 4+4 square root of 2?
*August 28, 2010*

**algebra 1**

Thank you!
*August 28, 2010*

**algebra 1**

What is the area of a square with the dimension of 1+square root of 2? I'm thinking 3+2*square root of 2? *=times
*August 28, 2010*

**chemistry (acid-ionization constant)**

A 0.942 M sample of carbonic acid, H2CO3, has a measured hydronium ion concentration of 6.36 ´ 10–4 M. Calculate the acid-ionization constant of carbonic acid. The equilibrium equation is: H2CO3(aq) + H2O(l) <--><--> H3O+(aq) + HCO-3(aq)
*August 9, 2010*

**chemistry**

what is an ICE chart?
*August 9, 2010*

**chemistry**

A 0.942 M sample of carbonic acid, H2CO3, has a measured hydronium ion concentration of 6.36 ´ 10–4 M. Calculate the acid-ionization constant of carbonic acid. The equilibrium equation is: H2CO3(aq) + H2O(l) <--><--> H3O+(aq) + HCO-3(aq)
*August 9, 2010*

**chemistry**

For a system in which DHvap > TDSvap, what state is favored?
*August 6, 2010*

**chemistry**

Determine the entropy change for the following displacement reaction. Cl2(g) + PbBr2(aq) → PbCl2(aq) + Br2(l). DS: (J/K mol) Cl2(g) 223.066; PbBr2(aq) 182.7; PbCl2(aq) 131.3; Br2(l) 152.231
*August 6, 2010*

**algebra 1**

Thanks! My calculator doesn't have that button, so the Google calculator will come in handy!
*July 30, 2010*

**algebra 1**

A=1020(1-0.195)exponent of 20 How do you figure out exponents that are high numbers?
*July 30, 2010*

**chem**

how did you get the 5.55 x 10^-3 ?
*July 24, 2010*

**algebra 1 **

Thank you! You were a lot of help!
*July 24, 2010*

**algebra 1 **

Use elimination to solve the the system of equations given by 10x-4y=-20 and 10x-5y=35. I can't figure this one out. Whenever I check my work, it is incorrect.
*July 24, 2010*

**algebra 1**

Thank you!
*July 24, 2010*

**algebra 1**

What point is a solution to the system of inequalities y(inequality arrow pointing right)4x and y(inequality arrow pointing right)-2x-3? -1/2,-2?
*July 24, 2010*

**English**

Thanks!
*July 12, 2010*

**English**

Hi, could you please tell me if these 2 sentences are correc. Each of the twins has a doll in their room. 2. The couple have gone on vacation. Also, when you have neither....nor, you use has don't you? Example Neither Helen nor Sarah has finished their homework.
*July 12, 2010*

**Algebra**

Salisbury High School decided to take their students on a field trip to a theme park. A total of 150 people went on the trip. Adults pay $45.00 for a ticket and students pay $28.50 for a ticket. How many students and how many adults went to the park if they paid a total of $4770
*July 6, 2010*

**Economics**

With the new UK emregncy budget what are the advanatages and disadvantages of decreasing the corporation tax?
*July 6, 2010*

**biology**

Thank you!
*July 5, 2010*

**biology**

When genetically engineering an organism, a plasmid a. is the main chromosome of the bacteria that is cloned. b. is cut with a restriction enzyme to accept the gene of interest. c. helps screen for cells that did not take up the gene of interest. d. combines with the gene of ...
*July 5, 2010*

**grammar**

Thank you soooo much for the help!! (0:
*July 1, 2010*

**grammar**

Can someone please check the errors I have noted and let me know if they see more? I am supposed to find 20 errors but can only find 15!! Please help. The correction is in parentheses. Why are great numbers of students choosing to pursue their college degrees using their home ...
*July 1, 2010*

**spanish**

Thank you so much! ¡Gracias!
*June 18, 2010*

**spanish**

(2 people talking to each other) "?Comen tus amigos contigo todos los dias?" "Si,_____ comen conmigo." a. nunca b. por la noche c. siempre d. manana C? There is a line above A in dias and a squiggly line above the first N in manana. Sorry about the ...
*June 18, 2010*

**spanish**

Thanks!
*June 17, 2010*

**spanish**

El profesor _____,y el estudiante _____. a. termina las clase/empieza la clase b. ensena/estudia c. ensenar mucho/estudiar d. empieza la clase/terminar I think B? There are squiggly things over the N's in ensena and ensenar.
*June 17, 2010*

**geometry**

Right triangle ABC is similar to triangle XYZ, because angle B is congruent to angle Y. If side AB equals 12 inches, side BC equals 27 inches, and side YZ equals 9 inches, then what is the length of side XY?
*June 9, 2010*

**chemistry**

How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.
*May 31, 2010*

**chemistry**

How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.
*May 31, 2010*

**Chemistry - **

create a balanced chemical equation and state the type of reaction. Zinc metal reacts with aqueous silver nitrate to produce solid silver and an aqueous solution of zinc nitrate. please go step by step, would be very helpful.
*May 29, 2010*

**spanish, again**

Thanks! I'll try that!
*May 29, 2010*

**spanish, again**

Thank you! I have a Windows PC. I would really appreciate the chart.
*May 29, 2010*

**spanish, again**

(upside down question mark) Que ____ hacer tu y yo para su cumpleanos? a.puedo b.puedes c.podemos d.pueden Is it C?
*May 29, 2010*

**spanish**

Thank you!
*May 29, 2010*

**spanish**

(upside down question mark)De quien es _____ sueter? a. este b. esta c. su d. esos A?
*May 29, 2010*

**chemistry**

change 120 ml to l .120 L then divide M by L to get moles 2.80 M/.120 L then take this and multiply it by the atomic weight or mass of NO
*May 23, 2010*

**Chemistry**

The most abundant isotope of the element nobellum has a half-life of 58 minutes. After 174 minutes the sample has a mass of .300 mg. What was the orignal mass of the sample? A. 1.20 mg B. 4.80 mg C. .600mg D. 2.40 mg
*May 23, 2010*

**chemistry**

Ba-140 has a half life of 13.0 days. What fraction of a sample will remain after 39 days?
*May 22, 2010*

**Chemistry**

The half-life of xe-133 is 126 hours. Starting with 250 mg, after 500 hours around how many mg remain?
*May 22, 2010*

**6th Grade Math**

yellow
*May 18, 2010*

**social studies**

sailor
*May 18, 2010*

**science**

what
*May 18, 2010*

**algebra**

how would you solve the follwing equation? (2c/c-4)-2=(4/c+5)
*May 17, 2010*

**math**

628. if there is more than 6 ones, its 628. if it says more than 6 ones, inclusive than it could be both.
*May 17, 2010*

**Geometry**

i believe it would be 56.52 (not 100% positive though) because if the radius is 6, then the circumference would be 3.14(6^2)= 3.14(36) which is 113.04 then you would put that over 360 and set up a proportion: 113.04/360 = x/180 (simplified to 20347.2/360) which gives you a ...
*May 17, 2010*

**math**

i think it would be 8 to 1 because 4000 -> 500 so 400->50 and 40->5 which would be 8->1
*May 17, 2010*

**algebra**

each week, mandy's algebra teacher gives a 10 point math quiz. after 5 weeks, mandy has earned a total of 36 points for an average of 7.2 points per quiz. she would like to raise her average to 9 points. on how many quizzes must she score 10 points in order to reach her goal?
*May 17, 2010*

**Social Studies**

india and china
*May 15, 2010*

**pyschology 1**

How would you use classical conditioning, operant conditioning, and observational learning to improve your academic performance? Give one example for each type of learning.
*April 18, 2010*

**MATH/OPTICS**

given di=145, do=38,hi=-97 formula: hi/ho=-di/do how do i rearrange this?? i do not want the answer. need help rearranging equation please help!!
*April 12, 2010*

**English **

It's A, because demonstrative pronouns = this, that, these, those.
*April 5, 2010*

**biology**

In mitosis, what is the size of a daughter cell relative to the size of the parent cell? If an onion cell has 10 chromosomes, how many double chromosomes does an onion cell have at the start of metaphase? Thanks!
*April 2, 2010*

**Chemistry**

Which of these is true about the following reaction? NaOH + HCl ¡æ NaCl + H2O A. NaOH is the proton acceptor. B. HCl acts as the Br©ªnsted-Lowry acid. C. NaOH and HCl are the products. D. This is an example of a neutralization reaction. E. The products ...
*March 29, 2010*

**Chemistry**

How much heat is given off when 24.0 g of methane is burned in air? The equation for the reaction is: CH4 + 2O2 => CO2 + 2H2O + 890 kJ What equation or formula should I use to solve this? Thanks!
*March 29, 2010*

**SCIENCE: GR.10 OPTICS CONVEX MIRRORS**

A convex security mirror has a focal length of -0.25m. A person with a height of 1.5m is 4m from the mirror. calculate the image distance and image height. AND An object 0.4m tall is placed 2.5m in front of a convex mirror that has a focal length of -90cm. Calculate image ...
*March 28, 2010*

**science optics**

A cosmetic mirror is 50cm from your face and the magnified image of your face is upright. You are told that the focal length of the mirror is 45cm. Explain why this focal length is not possible. I understand that the image would be magnified and upright...that's about it
*March 28, 2010*

**Math**

What is the product of the sum of 1.3 and 0.9 and the difference of 1.2 and 0.8
*March 22, 2010*

**p.e theory**

explain how stregths and weaknessess can affect your health and efficency in sport?
*March 14, 2010*

**Physics**

Thank you.
*March 8, 2010*

**Physics**

A rectangular piece of gold is 3.1 cm long and 3 cm wide. Resistivity of gold is 2.4*10^-8. How deep is the piece when it displays a resistance of R = 1.65 μω for a current that flows along the depth-direction? I used R=(p*l)/A and solved for l. I got the answer ...
*March 8, 2010*

**MATH**

how do you change metric units
*March 3, 2010*