Sunday

August 28, 2016
Total # Posts: 176

**Science**

I am doing an extension to get into the AP Biology course offered by my school. This particular extension asked me to use vinegar and baking soda aswell as some basic scientific tools to find the concentration of acetic acid in vinegar. I wanted to know what a procedure for ...
*April 24, 2016*

**Math**

*Edited* (thanks Alex!) In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown hair, 1/3 of them have green eyes. Question: What fraction of the girls in the class have long brown hair?
*April 22, 2016*

**math**

oh haha! Good question. Part A: What fraction of the girls in the class have long brown hair?
*April 22, 2016*

**math**

In a class, 4/5 of the girls have brown hair. Of the brown-haired girls, 3/4 of the have long hair. Of the girls with long brown hair, 1/3 of them have green eyes.
*April 22, 2016*

**Physics**

The guy up there is half right. But you have to take into account the force of gravity as well since the work done by the spring is going to be the energy from the external force and the energy from the force of gravity. So, mg= kx k=mg/0.05 work done is 1/2kx^2 which gives ...
*April 10, 2016*

**Math**

Robert took a math test and got 36 out of 50 correct. What is the percentage of correct answers?
*February 1, 2016*

**Tagwi **

If a glass holds 2/3 cup of milk and a pitcher has 8 cups how many glasses can be filled from the milk in the jug
*January 28, 2016*

**History!**

And, does these characteristics still hold true today?
*January 28, 2016*

**History!**

In America! It's American Histor, so East and West of the United States
*January 28, 2016*

**History!**

During the late 1800s, what were the major characteristics of the East and the West?
*January 28, 2016*

**Chemistry**

3.90g sample of Al with an unknown initial temperature is dropped into 10 mg of water at 22.6 degrees Celsius. What will teh change in temperature be of the Al if its final temperature is 28.6 degrees Celsius?
*November 1, 2015*

**math**

7=-2/v+4 solve for v
*September 23, 2015*

**physics**

a ball tossed up at a rate of 8.7 ms/ and catches the ball at the same place on the way down. How long was the ball in the air?
*September 13, 2015*

**Geometry**

What is the Midpoint of CD given the coordinates C(-4,8) and D(8,-4)?
*August 3, 2015*

**English**

Im thinking that it is the second choice.
*May 20, 2015*

**English**

Which sentence is punctuated wrong. Who borrowed Celeste biology books? Who borrowed Celeste's biology books? Who borrowed Celestes' biology books? Who borrowed Celestes's biology books?
*May 20, 2015*

**Biology**

Which organ systems help deliver oxygen to body cells? I think that its the enodcrine and lymphatic systems the other choices are A.respitory and excratory B.muscular and immune systems C.respiratory and circulatory systems
*May 20, 2015*

**English**

I dont Know what they are thats why I was hoping you could help me, Im puzzled on these hw questions
*May 20, 2015*

**English**

Is 18 C 19.A 21.D
*May 20, 2015*

**English**

A B B C
*May 20, 2015*

**English**

18. Identify the sentence that relies most strongly on emotional language. A. If this project isn't successful, you will receive a low grade. B. If this project does not succeed, it will be on your head. C. You will be held responsible if this project does not succeed. D. ...
*May 20, 2015*

**English**

@Ms. Sue
*May 20, 2015*

**English**

Logos
*May 20, 2015*

**English**

Which of the following is used when a political activist reminds others of the trials and tribulations facing the nation if change does not occur? A. ethos B. pathos C. logos
*May 20, 2015*

**English**

Identify the sentence in which the underlined pronoun is used incorrectly. A. There are only six days left in the school year. B. It will be fun to visit their house in the summer. C.Their just going to have to wait to see the movie. D. Greg refused to go there because of the ...
*May 20, 2015*

**calculus**

A cattle rancher wants to enclose a rectangular area and then divide it into six pens with fencing parallel to one side of the rectangle (see the figure below). There are 540 feet of fencing available to complete the job. What is the largest possible total area of the six pens?
*March 23, 2015*

**English-Please Help**

Tysm answer
*March 13, 2015*

**Math**

Hi, thanks for help in advance. Using the Equation: f(w) = 10/w - 0.77ln(w) – 3.2 How do i use Newton-Raphson iterative to find the required value of w correct to 3 significant figures, starting from w0 = 3. Thanks
*February 15, 2015*

**Math**

Train A leaves Tigerville at 9 am traveling east at 85 mph. Train B leaves Liontown at 9:20am travelling west at 60 mph on the exact same tracks. Tigerville and liontown are 154 miles apart. At what time will the trains meet?
*February 14, 2015*

**Algebra**

Train A leaves station at 9am traveling east at 85 mph. Train B leaves station at 9:30 am traveling west. Both train are on the same track. At what time will they meet?
*February 14, 2015*

**physics**

There are two pit balls equally charged and each with a mass of 1.5g. While one ball is suspended by a thread, the other is brought close to it and state of equilibrium is reached. In that situation,the two balls are seperated by 2.6cm and the thread attached to the suspended ...
*January 5, 2015*

**Physical Science**

Most what use fuel or electricity as a source of energy
*December 10, 2014*

**Pre-Calc**

At a swim meet, a parent is videotaping his son from a seat in the stands that is 20 meters past the starting line and 8 meters away from his son's lane. Let x represent the distance the son has swum. a. Write x as a function of (theta). b. At what angle does the parent ...
*December 7, 2014*

**Science**

What volume of 0.050M sodium hydroxide is needed to react with 25cm3 of 0.068M ethanoic acid?
*November 26, 2014*

**Geography**

How has mexico's culture been shaped by conflict among other people?
*November 21, 2014*

**Math**

thank you so much Frank!!
*November 16, 2014*

**Math**

A photocopy was made of Julie's watercolor painting. the photocopy resized the painting so that it measured 4 inches wide by 7 inches long. If the actual painting is 16 inches wide, what is the length?
*November 16, 2014*

**Calculus**

A marble is dropped from the top of the empire state building. a. Determine the position and velocity functions for the marble b. What is the average velocity for the first 3 seconds of flight? c. Whatisthespeedofthemarblewhent=0? t=3? t=6? d. How long does a person looking up...
*November 8, 2014*

**Calculus**

Joshua jumps from a platform diving board that is 32 feet above the water. The position of the diver can be modeled by s(t) = -16t2+16t+32, where s is his position and t is the seconds that have gone by since he jumped. When does the diver hit the water, and what was his ...
*November 8, 2014*

**Statistics**

12 cards are drawn with replacement from an ordinary deck of 52 cards. What is the probability that 4 queens of hearts, 4 aces of spades, and 4 kings of clubs are drawn?
*September 14, 2014*

**Statistics**

The question also asks for a Venn diagram to explain the answer.
*September 14, 2014*

**Statistics**

If P(A/B)=1 must A=B?
*September 14, 2014*

**Differential Equations**

Classify the following differential equations as linear or nonlinear: 3x' +5x=7t^2 4x^2+2x+5tx=0
*September 11, 2014*

**math**

James swims 3/4 miles 5 times a week. How far does he swim in one week.
*April 10, 2014*

**Chemistry**

Benzene has a heat of vaporization of 30.72kJ/mol and a normal boiling point of 80.1 ∘C. At what temperature does benzene boil when the external pressure is 480torr ?
*April 7, 2014*

**Math**

Thanks man!
*March 30, 2014*

**Math**

Find the number of elements in A1∪A2∪A3, supposing that there are 103 elements in A1, 992 elements in A2, 10011 elements in A3, in each of the following situations: (a) The sets are pairwise disjoint, that is, no pair has common elements, that is, the intersection ...
*March 30, 2014*

**Chemistry**

A 2.6 g of a substance that looks like gold needed 9.4 J of heat energy to raise its temperature from 20 to 38 ºC. Is the metal pure gold?
*March 7, 2014*

**Physics**

Hello bobpursley, can you get someone like yourself to help me with my physics problem which is posted right below this question
*November 13, 2013*

**Math/Science**

Then how would I find the toatl displacement from starting point?
*November 13, 2013*

**Math/Science**

An ocean liner is traveling at 5m/s. A passenger on deck walks towards the rear of the ship at a rate of 4m/s. After walking 30 meters, he turns right and walks at a rate of 4m/s to the rail, which is 12 meters from his turning point. What is his velocity relative to the water...
*November 13, 2013*

**Chemistry**

FeCl3(aq) + K2S(aq) Fe2S3(aq) + KCl(aq) Consider the unbalanced equation above. What is the maximum mass of Fe2S3 that can be produced when 54.5 mL of 0.480 M FeCl3 and 98.5 mL of 0.420 M K2S react?
*October 7, 2013*

**Chemistry**

C2H6(g) + O2(g) CO2(g) + H2O(g) (a) Consider the unbalanced equation above. What is the maximum mass of CO2 that can be produced when 21.0 g of C2H6 and 38.5 g O2 react? (b) If 24.7 g of carbon dioxide is actually produced by the reaction in part (a), what is the percent yield...
*October 7, 2013*

**Chemistry**

What is the maximum mass of the lower molar mass product that can be formed when 83.0 g of solid barium bromide and 20.5 g chlorine gas react?
*October 7, 2013*

**Chemistry**

Al(s) + HCl(aq) AlCl3(aq) + H2(g) Zn(s) + HCl(aq) ZnCl2(aq) + H2(g) Consider the unbalanced equations above. A 0.200 g sample of a mixture of aluminum and zinc metal is reacted with an excess of hydrochloric acid. Both metals react with hydrochloric acid. The sample produces ...
*October 7, 2013*

**Physics**

A fireworks rocket is moving at a speed of 48.4 m/s. The rocket suddenly breaks into two pieces of equal mass, which fly off with velocities v1 and v2, as shown in the drawing. What is the magnitude of (a) v1 and (b) v2? In the image the two pieces are going off in a right ...
*October 6, 2013*

**Civics **

What is the definition of a citizen and where did this concept begin? Please help :)
*September 26, 2013*

**Physics**

A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 4.53 m/s2. She decides to test the car by dragging with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 1.01 s before Kathy. If Stan moves ...
*September 20, 2013*

**Algebra**

Solve for M: 3P = 12C + 10MC
*September 3, 2013*

**Algebra**

y = ax, has asymptote ________ and y-intercept ________.
*May 5, 2013*

**Chemistry**

for the reaction 2NaOH + h2SO4 yieda 2H2O + Na2SO4 if .80 moles of NaOH are used, how many moles of H2SO4 must be used?
*May 2, 2013*

**Chemistry**

For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.
*April 1, 2013*

**Chemsitry**

For a particular redox reaction NO2– is oxidized to NO3– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in basic solution. Phases are optional.
*April 1, 2013*

**science**

What is the formula for friction force
*March 27, 2013*

**turnford**

prove the following 2 cosec 2θ cos2θ = cotθ - tanθ
*March 13, 2013*

**turnford**

prove the following 2 cosec 2θ cos2θ = cotθ - tanθ
*March 13, 2013*

**Spanish Please help**

Will somebody please help or translate these. Thank You 4. Which expression is used to talk about what you have just done? venir de hacer la tarea hacer un viaje acabar de 5. Vengo de la clase. ¿Qué acabo de hacer? Acabas de bailar. Acabas de bailas. Acabas de ...
*January 31, 2013*

**Spanish help please.**

Thnk you so much. Your sure these are right.
*January 28, 2013*

**physics**

a plane flys 350 km south along a straight path with an average velocity of 125 km/h to the south. the plane has a 30 minute layover and then travels 220 km south with an average velocity of 115 km/h to the south. what is the average velocity of the trip
*November 13, 2012*

**Accounting**

When calculating the times interest earned ratio, you you include "interest expense on debt extinguishment" in the interest expense? Thanks!
*November 8, 2012*

**English**

Create a Halloween story by filling in the blanks with adjectives. Remember adjectives are words that describe or tell about nouns. The words in () is my adjective answer I used. You Cannot use an adjective more than once The ____(full) moon was shining down on the _____,(old ...
*October 29, 2012*

**Math Grade 5**

I'm I pretty smart student and the answer is correct. Algebra: 55+x = 4 (7+x) 55+ x = 28 + 4x 27 = 3x x = 9 And if your grade 5 👇🏻👇🏻👇🏻 👇🏻👇🏻👇🏻 Make two columns Mr. Jacob Tony 9 ...
*October 19, 2012*

**Physical Science**

You submerge 100 grams of steel in 200 grams of water. If the steel has an initial temperature of 80°C and the water has an initial temperature of 10°C, what is the final temperature of the system? The specific heat capacity of the steel is 0.15 cal/g•°C
*October 12, 2012*

**Math**

What are the base-five numbers for the base-ten counting numbers 1 to 26?
*October 8, 2012*

**arithmetic**

How is eight hundred twenty-six thousandths written in decimal form?
*October 8, 2012*

**Economcis**

Is GDP calculated by the price of the good with the indirect tax or the price of the good before the indirect tax? For example, if an economy only produces a single $10 good and it is taxed 10%, is GDP $10 or 11$? Thanks!!!
*October 8, 2012*

**Chemistry**

How many milliliters of an aqueous solution of 0.219 M magnesium bromide is needed to obtain 10.1 grams of the salt ?
*October 3, 2012*

**Chemistry Pretest**

86.7%
*September 28, 2012*

**Dynamics**

The rotor is an amusement park ride where a person enters the Rotor when it is stationary and stands against the wall with their back against the wall. The rotor then begins to spin around a vertical axis. After reaching cruising speed, the floor drops away and the patron is ...
*September 28, 2012*

**Chemistry**

Mg +2HCL = MgCl2 +H2 what mass of hydrogen is obtained by adding excess hydrochloric acid to 6g of magnesium
*September 25, 2012*

**10th grade honors chemistry**

1.3 pounds of a material with a density of 3.7 g/mL would occupy what volume in liters?
*August 29, 2012*

**math**

lol thanks
*July 29, 2012*

**math**

the following all-red train and all-green train are equal in length. Do these trains give information about common factors, common multiples, or both?
*July 29, 2012*

**basic calculus**

use the first and second derivatives to find the x-coordinates of all local maxima and minima of f(x)=8e^2x-2x. indicate which of your answers are local minima and which are local maxima.
*May 14, 2012*

**college alegbra**

1/2 log 25- 3 log x
*May 2, 2012*

**Spelling**

Can anyone tell me the meaning of the word bade? Example for this sentence:The next morning John got up early and bade Rover goodbye.
*March 27, 2012*

**Math**

There's a triangle the numbers on each sides are 22 25 and 11 What is it's perimeter and area? Answer: P is 58 A is 345 There's a rectangle the numbers on 2 of the sides says 4 and 1 What is the Perimeter and area? Answer: P is 10 and A is 4 There's a rectangle...
*January 19, 2012*

**Math.**

On the paper it says height= 1 b
*January 19, 2012*

**Math.**

On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number? EXAMPLE There is a triangle one side is 1.5 the base is 2 and the other side is 3 ...
*January 19, 2012*

**Math**

9.000?
*January 19, 2012*

**Math**

Same thing on area? 1.5 X 2.0 X 3.0=9000?
*January 19, 2012*

**Math**

On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number? EXAMPLE There is a triangle one side is 1.5 the base is 2 and the other side is 3 ...
*January 19, 2012*

**Math**

The size of houses and buildings are measured in square feet. If you measured the outside length and width of a house and found the length was 60ft. and the width was 30ft., what is the size of the house in square feet? 60x30 and I got 1800ft
*January 18, 2012*

**Math**

All these are either rectangles or squares 1.Rectangle. 5 is length and 10 is width 10x5=50 2.Square. 5 is length and 5 is width 5x5=25 3.Rectangle. 6 is length and 8 is width 8x6=48 4.Square. 10 is length and 10 is width 10x10=100 5.Rectangle. 40 is length and 20 is width ...
*January 18, 2012*

**Triangles/Math**

The size of houses and buildings are measured in square feet. If you measured the outside length and width of a house and found the length was 60ft. and the width was 30ft., what is the size of the house in square feet? 60x30 and I got 1800ft
*January 18, 2012*

**Triangles/Math**

All these are either rectangles or squares 1.Rectangle. 5 is length and 10 is width 10x5=50 2.Square. 5 is length and 5 is width 5x5=25 3.Rectangle. 6 is length and 8 is width 8x6=48 4.Square. 10 is length and 10 is width 10x10=100 5.Rectangle. 40 is length and 20 is width ...
*January 18, 2012*

**Triangles/Math**

All of these are triangles Find the areas of the triangles 1. 8 is base and 5 is height A=bxh divided by 2 8x5=40 divided by 2=20 2. 6 is base and 7 is height A=bxh divided by 2 7x6=42 divided by 2=21 3. 12 is base and 5 is height A=bxh divided by 2 12x5=60 divided by 2=30 4. ...
*January 18, 2012*

**ELA**

Nation?
*January 18, 2012*