Sunday
April 20, 2014

Posts by Lily


Total # Posts: 1,091

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, wh...

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, wh...

algebra 1
What is the y-intercept of the graph of y=2^x+2? (0,4)?

algebra 1
Thanks

algebra 1
Is the answer no solution?

algebra 1
Use the Quadratic Formula to solve the equation: 5x^2 - 6x - 8=0 -.51,1.71?

algebra 1
Thank you!

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

algebra 1
Thanks again!

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?

algebra 1
Thanks!

algebra 1
Factor the expression: x^2 - x - 42 (x-7)*(x+6)?

algebra 1
Thank you!

algebra 1
Factor the expression: 4n^3 + 8n^2 - 5n - 10 (n+2)(4n^2 - 5)?

science
i got 1.1e54 for the mass of protons required but it said it was wrong

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 ...

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 set...

algebra 1
Thanks, again!

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?

algebra 1
Thank you!

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.

math
(0.80)+(0.03)=0.83

math
(0.80)+(0.03)=0.83

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, ...

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) I...

algebra 1
Thanks!

algebra 1
P.S. There aren't any brackets.

algebra 1
The y itself has a square root around it. 5+ square root of 2 is divided by 2.

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?

algebra 1
Thank you.

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?

Math
if you are talking about an object, use the water displacement method.

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?"

algebra 1
Thank you!

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?

algebra 1 again
Thank you for the help!:)

algebra 1 again
Square root of 4 is 2. 2 times 3 is 6. So 6 is the answer?

algebra 1 again
Simplify: 2 square root of 4 + square root of 4. 3 square root of 4?

algebra 1
Thank you again!

algebra 1
Simplify:2 square root of 4 + 2 square root of 8? 4+4 square root of 2?

algebra 1
Thank you!

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

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)

chemistry
what is an ICE chart?

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)

chemistry
For a system in which DHvap > TDSvap, what state is favored?

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

algebra 1
Thanks! My calculator doesn't have that button, so the Google calculator will come in handy!

algebra 1
A=1020(1-0.195)exponent of 20 How do you figure out exponents that are high numbers?

chem
how did you get the 5.55 x 10^-3 ?

algebra 1
Thank you! You were a lot of help!

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.

algebra 1
Thank you!

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?

English
Thanks!

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.

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

Economics
With the new UK emregncy budget what are the advanatages and disadvantages of decreasing the corporation tax?

biology
Thank you!

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 ...

grammar
Thank you soooo much for the help!! (0:

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 ...

spanish
Thank you so much! ¡Gracias!

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 questio...

spanish
Thanks!

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.

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?

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.

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.

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.

spanish, again
Thanks! I'll try that!

spanish, again
Thank you! I have a Windows PC. I would really appreciate the chart.

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?

spanish
Thank you!

spanish
(upside down question mark)De quien es _____ sueter? a. este b. esta c. su d. esos A?

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

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

chemistry
Ba-140 has a half life of 13.0 days. What fraction of a sample will remain after 39 days?

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

6th Grade Math
yellow

social studies
sailor

science
what

algebra
how would you solve the follwing equation? (2c/c-4)-2=(4/c+5)

math
628. if there is more than 6 ones, its 628. if it says more than 6 ones, inclusive than it could be both.

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 fin...

math
i think it would be 8 to 1 because 4000 -> 500 so 400->50 and 40->5 which would be 8->1

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?

Social Studies
india and china

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.

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!!

English
It's A, because demonstrative pronouns = this, that, these, those.

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!

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 wi...

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!

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 dist...

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

Math
What is the product of the sum of 1.3 and 0.9 and the difference of 1.2 and 0.8

p.e theory
explain how stregths and weaknessess can affect your health and efficency in sport?

Physics
Thank you.

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 wron...

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