Sunday

September 21, 2014

September 21, 2014

Total # Posts: 260

**Biology**

What happens to arterial PO2, PCO2, and H+ concentration during moderate excercise? How and why does this stimulate an increase in breathing rate?
*September 8, 2014*

**Civics**

Which best describes how the internet has contributed to cultural diffusion in the united states?
*April 18, 2014*

**Psychology**

independent variables
*February 26, 2014*

**Algebra 2**

Okay, so if the directions say describe the pattern, is that all I would put?
*February 12, 2014*

**Algebra 2**

How would you describe the pattern of this sequence? 2/3, 4/4, 6/5, 8/6, 10/7 The formula is 2n/n+2 where n is 1, 2, 3, 4, 5
*February 12, 2014*

**Biology**

Can someone please help me find a website? I am doing a project on Maple Syrup Urine Disease and need to find a website that says when the disease was first discovered or how long we have known about it.
*February 11, 2014*

**Math**

Find the largest positive integer that leaves the same remainder when divided into each of 889, 961, 1009, and 1189
*February 7, 2014*

**Math**

I mean Show that the equation 155x -465y=35has no integer solutions
*February 7, 2014*

**Math**

Show that the equation 155x -465y 35 has no integer solutions
*February 7, 2014*

**Math**

A simple calculation will reveal that 72 has 12 factors including 1 and 72. How many natural numbers less than 100 have 12 such factors
*February 7, 2014*

**Math**

Find the largest positive integer that leaves the same remainder when divided into each of 889, 961, 1009, and 1189
*February 7, 2014*

**Math**

In how many ways is it possible to spend exactly $200 on pumpkins if large pumpkins cost $5 and small $3
*February 7, 2014*

**math**

Value ways 2 3/5 miles each day.Bill runs 10 miles once every 4 days. In 4 days, who covers the greater distance?
*February 5, 2014*

**Computer Programming**

Professor Merlin has asked you to help him. He has 100 total students in his four classes but he is not sure that all of them took his last exam. He wants to average the grades for his last exam in all four sections of his medieval literature course and then determine how many...
*January 29, 2014*

**Math**

Let c be a constant. For what values of c can the simultaneous equations x – y = 2; cx + y = 3 have a solution (x, y) inside quadrant I
*January 17, 2014*

**Science?**

I'm doing a science experiment where I have to light an object on fire to do the experiment.. It can't be oil or electrical fire. So I need some objects I can light on fire. Such as a candle. But I can't use this one
*January 16, 2014*

**Chemistry**

A gas, Y, diffuses 1.05 times faster than SO2 gas at the same conditions. What is the molecular weight of gas Y?
*December 3, 2013*

**world history**

what are city states?
*November 7, 2013*

**world history**

list three environmental challenges facing the acient people of mesopotamia.
*November 7, 2013*

**Accounting**

The owner's equity of Logan's company is equal to one quarter of the total assets. Liabilities equal $60,000. What is the amount of owner's equity?
*October 14, 2013*

**Algebra 2**

Well its actually her computer.
*October 9, 2013*

**Algebra 2**

I did post the other question under the name Charlie though because I don't like to use my name as much.
*October 9, 2013*

**Algebra 2**

At the ruins of Caesarea, archaeologists discovered a huge hydraulic concrete block with a volume of 945 cubic meters. The block's dimensions are x meters high by 12x - 15 meters long by 12x - 21 meters wide. What is the height of the block? Can someone please show me how ...
*October 9, 2013*

**Algebra 2**

How do you get the real-number solutions of 5b^3 + 15b^2 + 12b = -36? I get to (b+3)(5b^2 + 12) and I don't know what to do after that. Can someone please show me how to finish this problem?
*October 9, 2013*

**Geography**

Thank you, it is a good website for what I need.
*October 7, 2013*

**Geography**

Does anyone know a good website that shows South American countries natural resources in detail?
*October 7, 2013*

**Geography**

Do you also know a good website that shows natural resources in South America?
*October 7, 2013*

**Geography**

I need a map of South America countries that shows their mineral deposits in details. Can someone please give me a website?
*October 7, 2013*

**Definitions**

I have looked and looked for 4 examples of a standalone computer but I have only found two. They are a fax machine, and TiVo box. Could someone please tell me what two more examples are?
*October 3, 2013*

**Algebra 2**

For the equation y<or equal to -x^2+3x+10 I got the vertex (3/2, 67/4). Is this right?
*September 25, 2013*

**Algebra 2**

A stunt motorcyclist makes a jump from one ramp 20 feet off the ground. The jump between ramps can be modeled by y= -1/640x^2 + 1/4x +20 where x is the horizontal distance (in feet) and y is the height above ground (in feet). I think a is 20 feet, but I don't know how to ...
*September 24, 2013*

**Algebra 2**

How do you get 50000?
*September 24, 2013*

**Algebra 2**

For the period 1990-2002, the number s (in thousands)lf cellular telephone subscribers in the United States can be modified by S=858t^2 + 1412t + 4982 where t is the number of years since 1990. In what year did the number of subscribers reach 50 million? The choices are the ...
*September 24, 2013*

**algebra 2 **

How would you solve 3x^2+8x-91=0 and 9r^2+4r+2=0 using the quadratic formula?
*September 23, 2013*

**English**

Thank you!
*September 19, 2013*

**English**

What are the common nouns in these sentences? I think I have them right but I'm not sure. 1 is zone. 2 is steamboat. 3 is sister 4 is cross, and crossings. 5 is brother and animals. 6 is beavers and people 7 is voyage and world. It would be greatly appreciated if someone ...
*September 19, 2013*

**Computer Definitions**

What is broadband Internet Connection?
*September 17, 2013*

**Algebra 2**

I got 105 meters by taking p=52.5 and adding q=52.5. Is 105 meters the width?
*September 4, 2013*

**Algebra 2**

The arch of the Gateshead Millennium Bridge forms a parabola with equation y=-0.016(x-52.5)^2+45 where x is the horizontal distance(in meters) from the arch's left end and y is the distance (in meters)from the base of the arch. What is the width of the arch?
*September 4, 2013*

**Algebra 2**

So that's how far it has to jump and y is how high it can jump from that point to the fence?
*September 2, 2013*

**Algebra 2**

What does the horizontal position mean?
*September 2, 2013*

**Algebra 2**

A woodland jumping mouse hops along a parabolic path given by y=-0.2x^2+1.3x where x is the mouse's horizontal position (in feet) and y is the corresponding height (in feet). Can the mouse jump over a fence 3 feet high? Explain. I know that x is 3.25 and the mouse's ...
*September 2, 2013*

**Algebra 2**

Thanks
*September 2, 2013*

**Algebra 2**

I'm using the formula -b/2a for the function9x^2+7. So I would get -0/2(9) which equals -0/18 and the final result is 0.
*September 2, 2013*

**Algebra 2**

So if I put 0 in a b I would get 0/18 which equals 0 for x?
*September 2, 2013*

**Algebra 2**

I need to find the vertex of the parabola y=9x^2+7 but I am confused on what to use for b. I know a=9 but am unsure if b=7. Does b=7?
*September 2, 2013*

**Algebra 2**

I need to find x of the quadratic function y=-5/3x^2-x-4. I'm supposed to use the formula x=-b/2a. The negative sign only applies to b. A=-5/3 and B=-1. When I substitute these values in I get -(-1)/2(-5/3). After working this out I get 1 over -10 over 3(1)/(-10/3). after ...
*September 2, 2013*

**Algebra 2Please Help **

I need to find x of the quadratic function y=-3/4x^2-4x-1 and keep getting (4)/(3/2). Is this right and if so, can it be reduced?
*September 1, 2013*

**Algebra 2**

I need to find x of the quadratic function y=-3/4x^2-4x-1 and keep getting (4)/(3/2). Is this right and if so, can it be reduced?
*September 1, 2013*

**Algebra 2**

I need to find x of the quadratic function y=-3/4x^2-4x-1 and keep getting (4)/(3/2). Is this right and if so, can it be reduced?
*September 1, 2013*

**Introduction to Physical Science**

Hello, I always thought that sound was to loud when it hurts our ears or when sound vibration can make extremely loud noises. I am stuck on the following question: How loud is too loud? When is a sound too loud? What can be done about sounds/noises that are too loud for you?
*August 19, 2013*

**algebra**

Create your own quadratic equation that has an axis of symmetry of x = −1 and whose graph opens down. Then find the vertex, domain, range, and x-intercepts. Show all work to receive full credit.
*August 14, 2013*

**writing process part 1**

Its just a to be a 8 sentence paragraph that fully develops the topic (a high school diploma is important to my future.) I need it proof read for mistakes and need to know if it fully develops that topic.
*June 18, 2013*

**writing process part 1 **

I need this paragraph proof read if that's OK. also need to know if it's a fully devolved the topic a high school diploma is important to my future. A high school diploma is important to my future for a number of reasons. The First being to attend college it is ...
*June 18, 2013*

**POL201**

Under the “necessary and proper” clause, Congress may
*May 29, 2013*

**chemistry**

What are [H+] and [OH-] for 0.01 M perchloric acid
*May 15, 2013*

**Chemistry**

0.1 mol of HCl is added to 1 L of water. What is [H+] and [OH-]?
*May 14, 2013*

**PHI103**

If I move to Texas, I will need air conditioning. I don't need air conditioning. So I didn't move to Texas" is an argument form known as
*April 8, 2013*

**chemistry**

How many moles of hno3 neede to prepare 7.5 l of a 5.6m solution
*March 19, 2013*

**physics**

if Royce was 10 years old and he had a mass of 30kg. but by the time he turned 16 his mass has grown to 60kg. how much larger is the gravitational force between Royce and earth at age 16 compared to age 10
*March 11, 2013*

** pre cal**

At a distance of 100 feet, the angle of elevation from the horizontal ground to the top of a building is 42 degrees. Find the height of the building
*November 7, 2012*

**physics**

A 20.7 cm screwdriver is used to pry open a can of paint. If the axis of rotation is 2.25 cm from the end of the screwdriver blade and a force of 29.3 N is exerted at the end of the screwdriver’s handle, what force is applied to the lid? Answer in units of N
*November 4, 2012*

**physics**

A 0.112 kg meterstick is supported at its 38.6 cm mark by a string attached to the ceiling. A 0.655 kg mass hangs vertically from the 4.74 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and translational equilibrium. The ...
*November 4, 2012*

**physics**

A 0.112 kg meterstick is supported at its 38.6 cm mark by a string attached to the ceiling. A 0.655 kg mass hangs vertically from the 4.74 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and translational equilibrium. The ...
*November 4, 2012*

**Physics**

Instructions for building a buried treasure include the following: Go 872 paces at 167 degrees turn to 286 degrees and walk 135 paces, the travel 319 paces at 152 degrees. A) Find the magnitude of the resultant displacement from the starting point. B) What is the direction of ...
*September 20, 2012*

**Physics**

A rollercoaster travels 135ft at an angle of 58.7 above the horizontal. How far does it move horizontally?
*September 20, 2012*

**Physics**

tammy leaves the office drives 50 km due north, then turns onto a second highway and continues in a direction of 32 degrees north of east for 93 km. At what angle is her displacement? (consider east to be 0 degrees and north 90 degrees)
*September 20, 2012*

**calculus**

The radius of the base of a right circular cylinder is r com and the height is 2r cm. Find the rate at which the surface area of the cylinder is increasing when the radius is 5 cm and the volume is increasing at 5pi cm/sec. Thank you!
*May 6, 2012*

**biochemistry**

What is the net charge on Phe-Asp at each pH? a. pH 1 b. pH 7 c. pH 14
*April 27, 2012*

**biochemistry**

a. What is the net charge on valine at pH 1? b. at pH 7? c. at pH 14?
*April 27, 2012*

**biochemistry**

Why does a change in pH usually produce a change in the ability of an enzyme to act as a catalyst? A. When the pH changes, the enzyme may lose its native conformation and lose its ability to function as a catalyst. B. When the pH changes, enzymes are surrounded by a solvation ...
*April 27, 2012*

**chemistry**

Why does a change in pH usually produce a change in the ability of an enzyme to act as a catalyst? A. When the pH changes, the enzyme may lose its native conformation and lose its ability to function as a catalyst. B. When the pH changes, enzymes are surrounded by a solvation ...
*April 26, 2012*

**chemistry**

What is the net charge on Phe-Asp at each pH? a. pH 1 b. pH 7 c. pH 14
*April 26, 2012*

**chemistry**

a. What is the net charge on valine at pH 1? b. at pH 7? c. at pH 14?
*April 26, 2012*

**chemistry**

Why does a change in pH usually produce a change in the ability of an enzyme to act as a catalyst? A. When the pH changes, the enzyme may lose its native conformation and lose its ability to function as a catalyst. B. When the pH changes, enzymes are surrounded by a solvation ...
*April 26, 2012*

**chemistry**

Benedict's reagent is used for detecting reducing sugars because _________. the —OH groups are exchanged for hydrogens. the copper ion in the reagent is oxidized as the sugar is reduced. the aldehyde group in the sugar is oxidized. a reduction of the sugar occurs ...
*April 20, 2012*

**chemistry**

Benedict's reagent is used for detecting reducing sugars because _________. the —OH groups are exchanged for hydrogens. the copper ion in the reagent is oxidized as the sugar is reduced. the aldehyde group in the sugar is oxidized. a reduction of the sugar occurs ...
*April 20, 2012*

**math 11**

Calculate the interest due on the following credit card balances. a)An unpaid balance of $1623.53 at a rate of 19.50% for 21 days. b)An unpaid balance of 2639.99 at a rate of 22.95% for 30 days.
*April 9, 2012*

**math 11**

Calculate the amount of interest earned in 10 years on $1000 invested at 3.00% per annum, compunded annually?
*April 9, 2012*

**Math 11**

Calculate the final value after 10 years if you invest 5000.0 at 2.5% per annum compunded annually?
*April 9, 2012*

**Chemistry**

Both carboxylic acids and phenols react with strong bases to produce _____. gaseous products the conjugate base of the carboxylic acid or phenol a complex with water a stronger acid or phenol
*March 22, 2012*

**Math**

Simplify the following expression. 8 - 4[(5 + 2)2 - (23 + 4)]
*March 9, 2012*

**chemistry**

The kinds of interactions that exist between CH3COOH molecules include dipole-dipole (including hydrogen bonding) interactions and London forces.True or False Its false there are no hydrogen bonds?
*March 5, 2012*

**chemistry**

True or false? Constitutional isomers and conformations have the same molecular formula.
*March 4, 2012*

**chemistry**

Choose the type of shape that best matches to CH4. Linear Trigonal planar Bent Tetrahedral Pyramidal
*March 4, 2012*

**chemistry**

True or false? Constitutional isomers and conformations have the same molecular formula.
*March 4, 2012*

**ENGLISH--Please Help**

Can you check this for grammer mistakes? By taking a Modern World Literature class, one should expect to read novels about cultures throughout the world, and I think Snow Flower and the Secret Fan did a wonderful job in portraying the customs and traditions of mid nineteenth ...
*March 2, 2012*

**chemistry**

do hydrogen bonds form between methanol (CH3OH) molecules? no, because methanol does not contain fluorine or nitrogen atoms yes, because methanol has a hydrogen attached to an oxygen atom may vary depending on the temperature
*March 1, 2012*

**chemistry**

Which has the higher boiling point? (a) CH3CH2CH2CH2CH3 or (b) CH3CH2CH2CH2CH2CH2CH2CH3
*March 1, 2012*

**chemistry**

Which of the molecules can form a hydrogen bond with a water molecule? 1. CH3OH 2. CH2=CHCH3 3. CH3CH2SH 4. CH3OCH3
*March 1, 2012*

**chemistry**

Do hydrogen bonds form between methanol (CH3OH) molecules?
*March 1, 2012*

**chemistry**

Indicate the number of covalent bonds that each nonmetal atom is expected to form. a. Se is expected to form 2 covalent bonds. b. H is expected to form 1 covalent bonds. c. Br is expected to form 1 covalent bonds. d. N is expected to form 3 covalent bonds.
*March 1, 2012*

**chemistry**

Calculate the pH of a 0.0019 M HNO3 solution. 2.7
*February 29, 2012*

**chemistry**

a. How many moles of NaOH are present in 89.6 mL of 0.714 M NaOH? 6.40E-2 b. How many moles of HCl are present in a 30.0 mL sample that is neutralized by the 89.6 mL of 0.714 M NaOH? 6.40E-2 c. What is the molar concentration of the HCl solution described in part b of this ...
*February 29, 2012*

**chemistry**

so the answer would be OH- decreases
*February 29, 2012*

**chemistry**

As the pH of a system decreases: the [H+] decreases the Kw decreases the [OH-] decreases all of the above
*February 29, 2012*

**chemistry**

Calculate the pH of a 0.0019 M HNO3 solution.
*February 29, 2012*

**chemistry**

alculate the H3O+ concentration present in water under the following conditions. Enter your answer in scientific notation. a. [OH-] = 8.9 x 10-5 M 1.1E-10 b. [OH-] = 3.8 x 10-3 M 2.6E-12 c. [OH-] = 4.8 x 10-12 M 2.1E-3
*February 29, 2012*

**chemistry**

ndicate whether each solution is acidic, basic, or neutral. a. [H3O+] = 6.9 x 10-1 M This solution is acidic. b. [H3O+] = 8.2 x 10-13 M This solution is basic. c. [H3O+] = 3.2 x 10-1 M This solution is acidic.
*February 29, 2012*