Saturday

April 18, 2015

April 18, 2015

Total # Posts: 4,894

**Chemistry**

Draw the isomers for C2h2 Is this correct? CH3-CH=CH-CH3 There's only one possible isomer.
*September 5, 2014*

**Chemistry**

If I count out Avogadro's number if CO2 molecules how much will my piles of molecules weigh? Can someone show me how to get the answer. I know the answer is 44g
*September 4, 2014*

**physics**

a pitched ball is hit by a batter at a 45 degree angle and it just clears the outfield fence, 110m away. If the fence is at the same height as the pitch, find the velocity of the ball when it left the bat. Ignore air resistance.
*September 4, 2014*

**Chemistry**

Thank you so much for helping with this!! Math part if chem is not my strongest :)
*September 3, 2014*

**Chemistry**

Sorry.. What is the density (g/mL)?
*September 3, 2014*

**Chemistry**

A syrup is added to an empty container with a mass of 102.00g . When 0.133 pint of syrup is added, the total mass of the container and syrup is 196.34g . (1 qt = 2 pt)
*September 3, 2014*

**WRITING AND COMMUNICATION**

Another word for a verbal bromide is a A. conceit. B. cliché. C. seltzer. D. euphemism. PLEASE HELP ME I AM BETWEEN B and C
*September 2, 2014*

**Writing Skills**

thank you so much I appreciate it
*September 1, 2014*

**Writing Skills**

5.A 10.A 19.A please check it
*September 1, 2014*

**Writing Skills**

please check it
*September 1, 2014*

**Writing Skills**

1.C 3.A 5.C 6.A 10.D 12.B 15.D 19.C
*September 1, 2014*

**Writing Skills **

1. What do we call an idea that will make the reader take notice and want to read on? A. Card B. Summary C. Hook D. Point of view Student Answer: B Answer: Incorrect Reference: 3. The most important difference between an outline and finished writing is the A. details. B. ...
*September 1, 2014*

**physics**

Suppose a 69-kg boy and a 42-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl.
*August 30, 2014*

**math**

A flagpole is supported by a wire that is 5m long. The wire is pegged 2.5m from the foot of the pole. Find the height of the pole
*August 23, 2014*

**Geometry**

a carpender is cutting a wooden dowl that is 72 cm long. she wants to cut it into 2 pieces so the 1 piece is 5 times as long as the other. what are the lengths of the 2 pieces?
*August 18, 2014*

**eng 130**

Which statement best illustrate a logical tautology
*August 18, 2014*

**Math- urgent**

A golf ball can travel 170 mph. This is 10/7 times the fastest speed recorded for a hockey puck. What is the record speed for a hockey puck? Make and equation and solve.
*August 6, 2014*

**Biology**

5’-CGCACCTGTGTTGATCACCTAGCCGATCCACGGTGGATCCAAGGC-3’ ||||||||||||||||||||||||||||||||||||||||||||| 3’-GCGTGGACACAACTAGTGGATCGGCTAGGTGCCACCTAGGTTCCG-5’ Tip: If you want to see a review of PCR, we recommend this amazing animation and virtual lab made by the ...
*August 4, 2014*

**public speaking**

1. “To persuade my audience that drinking and driving laws should be stricter” aims for: A. passive agreement with a policy. B. active agreement with a policy. C. personal action to support a policy. D. personal agreement to support a policy.
*July 29, 2014*

**public speaking**

2. “To persuade my classmates that cheating in an exam is just as wrong as plagiarism” is a: A. question of fact. B. question of policy. C. question of value. D. question of guessing.
*July 29, 2014*

**calc 2**

sum ((√(n-1))-(√(n-1)))/n, as n=1
*July 27, 2014*

**calculus 2**

r=1- 3Sin theta¸ find the area enclosed by the inner loop
*July 26, 2014*

**calculus 2**

Evaluate integral x/(1+|x|), (x,-3,3)
*July 26, 2014*

**calculus 2**

find dy/dx and (d^2)y/(d^2)x for x=2sint y=3cost 0<1<2pi
*July 26, 2014*

**calculus 2**

aprox 10.2688 thank you so much
*July 26, 2014*

**calculus 2**

y = ∛x for 1 is less then or equal to x and x is less then 6
*July 26, 2014*

**calculus 2**

use the simpsons rule with n=10, arc length y=^3√x, for 1<=x<6
*July 26, 2014*

**physics**

A single circular loop of wire of radius r = 2.5cm rotates at a frequency of 60 Hz in a constant magnetic field of magnitude B = 1.8 T. Use this to design a generator that produces an induced emf of 430 V. Hint: You must choose values for the number of loops and the area of ...
*July 17, 2014*

**algebra**

at a restaurant brandy paid twice as much as Katie and Katie paid $3 more than Stephanie if the total combined amount they paid was $56 how much did Katie pay
*July 14, 2014*

**Finite Math**

A political scientist has received a grant to fund a research project involving voting trends. The budget of the grant includes $3200 for conducting door-to-door interviews the day before an election. Undergraduate students, graduate students, and faculty members will be hired...
*July 4, 2014*

**Chemistry 1**

In the spectrum of a specific element, there is a line with a wavelength of 486 nm. Use the Rydberg equation to calculate the value of n for the higher energy Bohr orbit involved in the emission of this light. Assume the value for the lower energy orbit equals 2.
*July 1, 2014*

**Chemistry 1**

A dilute solution of hydrochloric acid with a mass of 614.86 g and containing 0.33004 mol of HCl was exactly neutralized in a calorimeter by the sodium hydroxide in 619.41 g of a comparably dilute solution. The temperature increased from 15.529 to 19.691°C. The specific ...
*July 1, 2014*

**Integral question**

1) find the integral from 1to -1 if(5sinx-2tanx+3x^5)dx 2) find the integral of x^3/(x^4+1)dx
*June 26, 2014*

**Derivatives**

Find the derivative of xsecy+y^5=5x^3-7
*June 26, 2014*

**Calc please help**

Find the derivative of f(x) (csc(2x^2+1)^4
*June 26, 2014*

**Calc please help**

That is where I am confused ...
*June 26, 2014*

**Calc please help **

Limit as x approaches zero (1/x-1/tanx)
*June 26, 2014*

**Chemistry**

I need to calculate the mass of CO2 produced in the reaction of NaHCO3 + HCl Data Mass of NaHCO3 = .05g Mass of system before reaction 117.9 g Mass of system after reaction 117l98 Maxium pressure 1.4094 initial pressure 1.0094 pressure change .4 temp 299.2K
*June 24, 2014*

**Stats**

The following data represent the number of live births in the United States in 2007 for women 15 to 49 years old. Age Live Births 15 - 19 445,045 20 - 24 1,082,837 25 - 29 1,208,405 30 - 34 962,179 35 - 39 499,916 40 - 44 105,071 45 - 49 7,349 Find the following: 1. What is ...
*June 16, 2014*

**Math**

Assume that you are drawing two balls without replacement from an urn that contains 13 green balls, 10 blue balls, and 1 red ball. What is the probability that you will draw a blue balls and a red ball?
*June 12, 2014*

**Math please help**

Find the smallest value on function (3/x)+(4/1-x) on interval (0,1)
*June 12, 2014*

**Math please help!**

Find lim as x approaches 0 of (e^x-1-x/2-x^3/6)/(x4)
*June 12, 2014*

**math**

?? but the ans is 0, 72 ,144,216,288,360 degree
*June 12, 2014*

**math**

Solve the equation cos3x=cos2x for 0¡Üx¡Ü360
*June 12, 2014*

**Math please help!!**

Find the derivative of (2^x-e^x)/(2^x+e^x)
*June 11, 2014*

**Math help!**

Find derivative using logarithmic differentiation F(x)= secx^cotx
*June 11, 2014*

**Math help!**

Find the derivative of tan(ln(5x))
*June 11, 2014*

**Math help!**

Find the derivative. F(x)=x^4+x^2+1/(x^2+1)
*June 11, 2014*

**math please help!**

Find the derivative if f(x)= e^-3x times sin(4x) use the product rule.
*June 11, 2014*

**Math- urgent**

Thank you!
*June 10, 2014*

**Math- urgent**

How do you find the sine, cosine, and tangent of a triangle?
*June 10, 2014*

**Microeconomics**

How do costs play into your everyday life? For example, why might it be cheaper to drive on a toll-road vs. a free-access interstate? Also, can you identify situations where you may fall victim to the sunk cost fallacy (we all do)?
*June 10, 2014*

**trig**

A weight attached to a long spring is bouncing up and down. As it bounces, its distance from the floor varies periodically with time. You start a stopwatch. When the stopwatch reads 0.3 seconds, the weight reaches its first high point 65 cm above the ground. The next low point...
*June 9, 2014*

**civics**

WOW im dumb today it must be C?
*June 4, 2014*

**civics **

How is the direct democracy similar to a representative democracy ? A. both types of government are run by a communist party. B.Both types of democracy give power to the elected representative. c.Both types of democracy give power to the elected representative. D. both types ...
*June 4, 2014*

**algebra**

X^9/x^2 H^14/h^5
*June 2, 2014*

**history**

wow i know what Writeacher said but she is accusing me of being some one else if you don't see in the comment
*May 29, 2014*

**history**

im just here to get some help
*May 29, 2014*

**history**

wait you cant acuss me of being someone that im not
*May 29, 2014*

**history**

no i dont know who that is
*May 29, 2014*

**history**

i dont know my teacher didnt send me one
*May 29, 2014*

**history**

hi i new to this and i need help with some world history questions and i don't have a book and I've already researched it and i did not find nothing. The conquest of new lands allowed Romans to A. increase the number of Roman citizens. B. decrease the number of slaves ...
*May 29, 2014*

**composition**

an animal i wanted for pet
*May 26, 2014*

**Algebra**

Find the coordinates of the image after a reflection in the given line. [-8, 1, -7] [-7, -5, 1]; y axis I am really bad with these types (matrices) of questions, please help me.
*May 26, 2014*

**physics**

An Angry Bird sits on a clothes line midway between the two poles. bird on line If the combined weight of the bird and rope is W, what is the tension in the rope in terms of θ and W? Select one: a. W cosθ / sinθ b. W tanθ c. W/(2sinθ) d. W/(2cosθ)
*May 26, 2014*

**physics**

An aircraft has an initial mass of m0 and an initial acceleration of a0. After flying for 2 hours, the mass of the aircraft has decreased by 11%, due to the burning of the fuel. If the propulsive force provided by the engines is constant, what is the expression for the new ...
*May 26, 2014*

**college physics**

A car travels around a bend of radius R at a speed v1, experiencing a centripetal acceleration ac. The car then travels around a curve with the same radius R, but with a centripetal acceleration which has twice the magnitude of ac. What speed is the car moving, when going ...
*May 25, 2014*

**English**

Thank you, Ms. Sue. :-)
*May 25, 2014*

**English**

Read the following lines from "An Arab Shepherd Is Searching for His Goat on Mount Zion." Searching for a goat or a son has always been in the beginning of a new religion in these mountains Which of the following sentences best explains the meaning of these lines? ...
*May 25, 2014*

**Guidance in early childhood education**

What are some ways that could create an encouraging classroom?
*May 25, 2014*

**Guidance in early childhood education**

What are some ways that could create an encouraging classroom?
*May 24, 2014*

**chemistry**

thanks for replying back Keq=(x)(x)/(0.1-x)(0.1-x) Keq=x^2/x^2-0.2x+0.01 do i take the square root of each side and then...
*May 22, 2014*

**chemistry **

initially 1 mol each of gaseous carbon dioxide, co2(g) and hydrogen h2(g) is inhected into a 10.0L reaction chamber at 986 degrees. What is the predicted concentration of each entity at equilibrium? the equation is as follows: co2(g)+ h2(g)= co(g)+h20 (g) k=1.60 at 986 degrees
*May 22, 2014*

**math**

Do you like have a graph or something
*May 21, 2014*

**math**

simplify. what are the excluded values? x^2+6x+9/5x+15
*May 20, 2014*

**Science**

Which one of the following factors would not speed up a chemical reaction
*May 15, 2014*

**geometry**

Concrete can be purchased by the cubic yard. How much will it cost to pour a slab that is 17 ft by 17 ft by 4 ft if the concrete costs $50.00 per cubic yard?
*May 14, 2014*

**Chemistry**

if you produce 5.7 of H2O, how many liters of O2 will be required?
*May 11, 2014*

**chemistry**

One kind of battery used in watches contains mercury(II) oxide. As current flows, the mercury(II) oxide is reduced to mercury. HgO(s) + H2O( ) + 2 e– Hg( ) + 2 OH–(aq) If 2.3 10–5 amperes flows continuously for 1200 days, what mass of Hg( ) is ...
*May 10, 2014*

**math**

The current river flows at rate of 4mph. In order for a boat to travel 24 miles up river and then return in a total of 5 hours how fast must the boat be able to travel in still water?
*May 8, 2014*

**Math (Quadratic Equations)**

A field is bound on one side by a river. A farmer wants to enclose the other three sides of the field with fence in order to create a rectangular plot of land for his cows. If the farmer has 400m of fence to work with, determine the maximum possible area of the field and the ...
*May 7, 2014*

**Language Check 2 Writeateavher**

I need help with 2,3 ,5, 6,7 , 9 PLEASE
*May 7, 2014*

**Language Check 2 Ms.Sue**

Correct capitalization, punctuation, and spelling. 1. We keep a variety of emergency equipment in the trunk of our car, a first-aid kit, jumper cables, a blanket, a flashlight, and road flares. A. car a first-aid B. car: a first-aid C. car; a first-aid D. car: a 1st-aid E. ...
*May 7, 2014*

**Language Check Ms.Sue**

I really don't. Can you explain the answer up each one. This is just for practice
*May 7, 2014*

**Language Check Ms.Sue**

I need help with 2, 3, 5, 6 PLEASE
*May 7, 2014*

**Language Check Ms.Sue**

Choose correct capitalization, punctuation, and spelling. 1. Thank you for you're prompt response to my request information about traveling to Australia. A. Thank you for youre B. Thank you for youre' C. Thank you for your D. Thank you for your' E. Correct as is MY...
*May 7, 2014*

**Math**

Add: 2/y^2 - 3x/y-x - 3/y
*May 6, 2014*

**Sam**

How?
*May 6, 2014*

**physics**

Thanks for your help, but I think that it is wrong. I keep getting 1.13 m/s as the answer, so I don't know if I went wrong somewhere.
*May 6, 2014*

**physics**

Yes, I think we are supposed to assume that it is in water.
*May 6, 2014*

**physics**

A steel sphere of radius 6.5 mm is dropped into a lake. What is the terminal speed of the sphere?
*May 6, 2014*

**physics**

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The surfaces are ...
*May 6, 2014*

**physics**

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The surfaces are ...
*May 6, 2014*

**physics**

A block of mass 20 g sits at rest on a plate that is at the top of the fluid on the right side of a U-tube. The U-tube contains two different fluids with densities ρ1 = 900 kg/m^3 and ρ2 = 630 kg/m^3 and has a cross sectional area A = 5.3x10^-4 m^2. The surfaces are ...
*May 6, 2014*

**chemistry**

An 0.727 mol sample of argon gas at a temperature of 22.0 °C is found to occupy a volume of 26.2 liters. The pressure of this gas sample is how many mm Hg?
*May 5, 2014*

**chemistry**

1. A 2.00 g sample of a particular compound was dissolved in 15.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85ºC. For pure CCl4, TB = 76.50ºC and KB = 5.03°C·kg/mol Calculate the boiling point elevation, ΔTB...
*May 4, 2014*

**chemistry**

A 2.00 g sample of a particular compound was dissolved in 15.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85ºC. For pure CCl4, TB = 76.50ºC and KB = 5.03°C·kg/mol Calculate the boiling point elevation, ΔTB, ...
*May 4, 2014*

**chemistry**

The acid dissociation constant, Ka, for this reaction is given by the following formula (this is also in your book): Ka=[H3O+][A−][HA] The acid concentration, [HA] is given in the introductory information of this problem. Using this information and your answers from the ...
*May 4, 2014*

**chemistry**

The chemical reaction for dissociation of an acid is: HA + H2O → H3O+ + A- Assuming all of the hydronium ion (calculated in in the previous problem) comes from this reaction, what is the concentration of conjugate base, [A-], in this system?
*May 4, 2014*

**chemistry**

The pH of a 0.00100 M solution of a particular acid is 4.95 at 25°C. Use the solution pH to calculate the concentration of hydronium ion present [H3O+]
*May 4, 2014*