Thursday

November 26, 2015
Total # Posts: 1,687

**science**

what is the scientific notation for 280 mm?
*September 8, 2010*

**geometry**

Rays PQ and QR are perpindicular. Point S lies on the interior of angle PQR. If m<PQS=4+7a adn m<SQR = 9+4a, find m<PQS and m<SQR
*September 8, 2010*

**math**

One year, China consumed 4 times as much energy as Brazil.Define a variable and write an expression for the amount of energy China used that year.I don't get the variable part and expression. Not the same person.
*September 8, 2010*

**math**

One year, China consumed 4 times as much energy as Brazil.Define a variable and write an expression for the amount of energy China used that year.I don't get the variable part and expression. Not the same person.
*September 8, 2010*

**college**

a rock is dropped off a bridge. How fast is it moving when it hits the water 2.5s later?
*September 7, 2010*

**Mayans and aztecs**

how did the aztecs acquire most new pieces of land
*September 6, 2010*

**math**

(17-5)(6+5) Do you know what's an expression is? Can you teach me how to do it?
*August 31, 2010*

**math**

(17-5)(6+5)
*August 31, 2010*

**math**

It means 14 divide by 2
*August 31, 2010*

**math**

14/2+3(5)
*August 31, 2010*

**math**

so, what's the right problem??????????
*August 31, 2010*

**Math**

Dave has quarters, dimes and nickles in his bank. He has 3 more dimes than quarters and 6 less nickles than quarters. There are 63 total coins. How many are quarters?
*August 26, 2010*

**8th grade**

what is a root word
*August 24, 2010*

**PHYSICS LEC**

please help...i need this immediately.. rolling friction. two bicycles are set rolling with the same initial speed of 3.50m/s on a long, straight road, and the distance each travels before its speed is reduced by half is measured. One tire is inflated to a pressure of 40psi ...
*August 16, 2010*

**geometry**

The length of a rectagle is 9 centimeters more than half the width. Find the legth if the perimeter is 60 centimeters.
*August 14, 2010*

**chemistry**

What mass of solute is needed to prepare 140 mL of 0.560 M KCl? how do i work this out?
*August 14, 2010*

**PHYSICS LAB**

a gold ball is hit with an initial velocity v0 = 53m/s at an angle of 50degrees above the horizontal. a)how high the ball go? b)what is the total time the ball is in the air? c)how far will the ball travel horizontally before it hits the ground?
*August 10, 2010*

**physics**

A long, vertical, straight wire carries a current I going upwards. The wire is perpendicular to the plane of a circular metal loop and passes through the center of the loop. The loop is allowed to fall and maintains its orientation with respect to the straight wire while doing...
*July 28, 2010*

**physics**

thanks, Bob!
*July 28, 2010*

**physics**

A step-down transformer has a turns ratio of 1:10 and its primary is connected across the terminals of a standard 120 V wall socket. A 330 ohm resistor is connected across the secondary of this transformer. What power P is dissipated in the resistor?
*July 28, 2010*

**physics**

The primary coil of a transformer is connected to a standard wall socket. A resistance R is connected across hte secondary coil. The resistance across the secondary coil is increased. What happens to the current in the primary coil, and what happens to the power being supplied...
*July 28, 2010*

**PHYSICS**

if by some suitable mechanism the falling body had been given an initial downward push instead of just being released, would the resulting value of (g) acceleration due to gravity have been different?why? tnx....please answer it...
*July 26, 2010*

**PHYSICS**

a)speed is the magnitude of instantaneous velocity. Is the average speed equal to the magnitude of the average velocity? Justify b)under what condition is the average equal to instantaneous velocity? c)a car travels 40 mph for 2 hrs and 60 mph for 3hrs.what is the average speed?
*July 26, 2010*

**Eth 125**

Ms. Sue. If you are uneducated enough as to refer to the concept of orientalism as people from asian countries. Please check your facts before posting answers. Orientalism clearly defined is answer C
*July 21, 2010*

**physics**

the forces on the table act on a ring but are said to be concurrent. if the cords were rigidly to the ring would the forces necessarily be concurrent?? will you please give me some explanation answers about this...thanks a lot..
*July 20, 2010*

**pHysics**

yeah...tnx drwls...you're the best...how can you answer all those questions in just one click... i hope to have that kind of knowledge too.. tnx again
*July 20, 2010*

**pHysics**

a rope 26 ft long is attached to two points A and B, 20 ft apart at the same level. A load of 250lb is carried at the middle of the rope. what force is exerted on A. please answer this immediately i need it...thanks a lot...
*July 20, 2010*

**physics**

a brick is dropped (0 initial speed) from the top of a building. the brick strikes the ground in 2.5 seconds. you may ignore air resistant so the brick is in free fall. A)how tall in meters is the building? B) what is the magnitude of the brick's velocity just before it ...
*July 18, 2010*

**college**

a ball is thrown vertically upward from the ground with the velocity of 30m/s, a)how long will it take to rise to its highest point? b)how high does the ball rise? c)how long after projection will the ball have the velocity of 10m/s upward? tnx
*July 16, 2010*

**Geometry**

An antique dealer visited three shops. She spent $25 at the first shop. At the second shop, she spent half of her remaining money. At the third shop, she spent one third of her remaining money and had $60 left. How much money did the dealer have originally?
*July 12, 2010*

**Geometry**

Larry, Lionel, and Lester painted a fence. Larry painted the first 1/3 of the fence. Lionel painted 3/5 of what rtemained. Lester painted the final 40 ft. How long is the fence?
*July 12, 2010*

**geometry**

A snail is crawling along a meter stick. At a certain point the snail stops. The snail needs to crawl three times as far as it has already crawled in order to be 4 cm from the end. How far has the snail already crawled?
*July 12, 2010*

**physics**

A person with mass 70 kg is climbing a ladder (length 6m, mass 20 kg) that leans against a smooth wall (no friction). A frictional force fs between the ladder and the floor keeps it from slipping. The angle between the ladder and the wall is 30 degrees. What is the magnitude ...
*July 7, 2010*

**physics**

Two identical loudspeakers are 2 m apart. A person stands 4.6 m from one speaker and 3.4 m from the other. What is the lowest frequency at which destructive interference will occur at this point?
*July 4, 2010*

**Physics**

36.8
*June 30, 2010*

**physics**

A 1210 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1820 N crate hangs from the far end of the beam. The angle between the beam and the horizontal is 30 degrees upwards and the angle between the horizontal and ...
*June 28, 2010*

**physics**

your approach makes a lot of sense. thanks for your help!
*June 27, 2010*

**physics**

a 20 g bullet strikes a 0.7 kg block attached to a fixed horizontal spring whose spring costant is 5600 N/m and sets it into vibration with an amplitude of 25 cm. What was the speed of the bullet before impact if the two objects move together after impact?
*June 27, 2010*

**algerbra**

i cant solve this can someone help me. 19.6 + X^2/2 ={(.007852*X /.001285)^2}/2 i know the answer is 1.01 but how do i get that
*June 23, 2010*

**physics**

how fast does the level of water in a full 2m high, 10cm diameter tank reduces when a 4cm diameter hole is opened at the bottom?
*June 23, 2010*

**college physics**

how fast does the level of water in a full 2m high, 10cm diameter tank reduces when a 4cm diameter hole is opened at the bottom?
*June 22, 2010*

**college physics**

find the weight of a piece of wood with a density of .5 g/cm cubed. which when attached to a 5kg stone in water it will sink. the density of the stone is 3g/cm cubed
*June 22, 2010*

**Psychology**

Post Hypnotic suggestions are best represented by which of the following Cocercive statements commands new ideas for self improvement Criticisms
*June 16, 2010*

**Psychology**

Either nightmares, night terrors, daydreams, or archetypical dreams
*June 16, 2010*

**Psychology**

What are dreams that contain symbolic characters and appear surreal?
*June 16, 2010*

**health**

The primary goal of wellness is the ability to achieve A.freedom from disease. B.a multicultural view of health. C.the highest possible quality of life. D.greater control over lifestyle decisions.
*June 11, 2010*

**Science**

using filtration??
*June 11, 2010*

**college physics**

find the frictional force exerted on a 20kg block pulled slowly over a horizontal floor using a rope which makes a 30 degree angle over the horizontal. the pulling force is 100N??? i found the Fn to be 146 N what do i do from there?
*June 10, 2010*

**philosophy**

What are key differences between the ontological, teleological, and cosmological arguments? Identify the philosopher who you think best supports his or her argument. Explain your answer briefly.
*May 26, 2010*

**physics**

a sled is pulled at a velocity across a horizontal snow surface. if a force of 8.0x10 to the first power N is being applied to a sled rope at an angle of 53 degrees to the ground, what is the magnitude force of friction
*May 24, 2010*

**10th grade**

the circle is circumscribed by the pentagon as shown (not drawn to scale). If QZ=10, YX=9, XW=9, UW=17, and SU=10, find the perimeter of the pentagon.
*May 20, 2010*

**englsh 3**

we are doing conjuction and compound sentences in class, and i need help diagraming this sentence: Little Red Ridinghood and her mother packed her basket witk cookies for her grandma.
*May 19, 2010*

**Government**

Which of the following is not a long term trend marking the expansion of suffrage in the United States?
*May 19, 2010*

**5th grade math**

Thanks! It was hard when I wasnt thinking that way! Now, I am able to do the rest of my homework without any trouble! Thanks for explaining it!
*May 14, 2010*

**5th grade math**

I came up with the answer of 12. Common greatest factor is 12. hope I did it right!Thanks again!
*May 14, 2010*

**5th grade math**

My class is selling flowers. We want to arrange them so that they are all in equal rows with no row containing different types of plants. Using the numbers from the table provided, what is the largest # of plants we can put in each row? (Marigolds-48 pots, Pansies-24 pots, ...
*May 14, 2010*

**Math**

Oh that makes sense. I forgot to look at the largest common factor. Thank you, I was thinking it was every other and how many can fit onto a tray! Thank you! That may help me in my other problem as well!
*May 14, 2010*

**Math**

It is a story problem. Courtney has 27 chocolate chip cookies and 36 oatmeal raisin cookies. She needs to arrange them on trays. She doesnt want to combine either type of cookies and she wants the same number on each tray. What is the largest number of cookies she can hve on ...
*May 14, 2010*

**algebra**

solve x-5/x*x-54 -7x+8/x*x-3x-54 +x-2-x*x+12x+36
*May 13, 2010*

**algebra 2**

The volume ( v) of a gas in a container at a constant temperature varies inversely as the pressure (p). If the volume of a gas is 24 cubic centimeters when the pressure is 16 pounds, what is the volume under a pressure of 30 pounds?
*May 8, 2010*

**geometry**

A right cylinder has a radius of 3 and a height of 12. What is its surface area? If necessary, round your answer to two decimal places.
*May 4, 2010*

**college physics**

A typical wavelength of infrared radiation emitted by your body is 25 µm (2.5 multiplied by 10-5 m). What is the energy per photon of such radiation?
*April 26, 2010*

**chemistry**

use resonance theory to account for the fact that aniline(pKb 9.37) is a weaker base than cyclohexanamine(pKb 3.34)
*April 25, 2010*

**Chemistry**

1)Write the general equation used to determine the volume of stock required to make a given concentration of standard? Define any terms you used. ----use the 100ml flasks to create four serial dilutions of the stock 10,000uM nitrate solution that has been provided. Prepare ...
*April 23, 2010*

**chemical oceanography**

Avg PO4^3- []'s in the deep and surface ocn's are 2.11 and 0.71umolkg^-1. Calc the residence time of PO4^3- in the deep ocn considering the carbon budget(Figure below) Write the general equation, calculation and units. ------ represents a Box outline Surface...
*April 23, 2010*

**chem 1p1**

An automobile tire at 22oC with an internal volume of 20.0L is filled with air to a total pressure of 30. psi(pounds per square inch). [1 atm = 14.696 lb/in2]. What is the amount in moles of air in the tire? If the air is mostly nitrogen, how many grams of it would be in the ...
*April 23, 2010*

**Chemical Oceanography**

Avg PO4^3- []'s in the deep and surface ocn's are 2.11 and 0.71umolkg^-1. Calc the residence time of PO4^3- in the deep ocn considering the carbon budget(Figure below) Write the general equation, calculation and units. ------ represents a Box outline Surface...
*April 22, 2010*

**Chemical Oceanography**

Avg PO4^3- []'s in the deep and surface ocn's are 2.11 and 0.71umolkg^-1. Calc the residence time of PO4^3- in the deep ocn considering the carbon budget(Figure below) Write the general equation, calculation and units. ------ represents a Box outline Surface...
*April 22, 2010*

**chemistry**

write the two half-reactions for the reduction of nitrate to nitrite using Cd2+
*April 22, 2010*

**home economics**

okay so i have these 4 questions that i have no clue about...i asked my mom and aunts but they dont make clothes so im stuck on these 4 question i would appreciate if you could please help me 7. You're sewing a child's nylon jacket. You notice the fabric frays easily. ...
*April 20, 2010*

**college**

The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?
*April 11, 2010*

**statistics**

The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?
*April 8, 2010*

**college chem**

how many mL of .100 M of acetic acid and .100 M of NaOH, would be need to make the volume 1.0 liters and have a pH7.00 if Ka=1.8x10^-5 please write out the eq for me
*April 7, 2010*

**physcis**

THIS WEBSITE IS SO SLOW. NO ONE EVER ANSWERS.
*April 6, 2010*

**English lit**

Have writers block. Need help with Julia Alvarez poem!? I have to write a 1000 word analysis of the Julia Alvarez poem "Ironing Their Clothes". I need help with a thesis. I have no idea what to write about! 1 year ago Additional Details With a hot glide up, then down...
*April 1, 2010*

**chemistry-please someone answer...i am clueless**

When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points: a.zero b.one c.two d.three Can you also explain why you choose your answer to this question...thanks
*March 25, 2010*

**chemistry**

When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points: a.zero b.one c.two d.three Can you also explain why you choose your answer to this question...thanks
*March 25, 2010*

**analytical chemistry**

When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points: a.zero b.one c.two d.three Can you also explain why you choose your answer to this question...thanks
*March 24, 2010*

**college chem**

can you elaborate a little more on how to so it
*March 24, 2010*

**college chem**

how many mL of .100 M of acetic acid and .100 M of NaOH, would be need to make the volume 1.0 liters and have a pH7.00 if Ka=1.8x10^-5? can someone please help me with steps to get the answer
*March 24, 2010*

**college chem**

what are the numbers for Conjugate acid and conjugate base
*March 23, 2010*

**college chem**

how did u get that can you please explain the steps
*March 23, 2010*

**college chem**

how many mL of .100 M of acetic acid and .100 M of NaOH, would be need to make the volume 1.0 liters and have a pH7.00 if Ka=1.8x10^-5
*March 23, 2010*

**math**

Thank you the site was very helpful.
*March 23, 2010*

**math**

I really don't understand this question and I can't seem to be able to solve it. Can anyone help me? Write a composite number between 7 and 20.
*March 23, 2010*

**chemistry**

A certain reaction has a delta H= -75 kJ and an activation energy of 40 kJ. A catalyst is found that lowers the Activation energy of the forward reaction by 15 kJ. What is the activation energy of the reverse reaction in the presence of this same catalyst?
*March 22, 2010*

**Chemistry**

Could someone tell me how I would write out trimethylammonium butanoate's structure? I think the butanoate part is CH3CH2CH2-C=O but I don't know how to add the trimethylammonium part to it.
*March 20, 2010*

**trig**

how do i find the amplitude, period, phase shift of y=2 cos(-4t-(-4 pi/3))
*March 18, 2010*

**chemistry**

1.5 x 10(10) mL
*March 11, 2010*

**windows XP**

On a shared folder, Read permission allows a user to display folder names, filenames, file data, and attributes; run program files; and change folders within the shared folder. True or false?
*March 11, 2010*

**computer science **

a bank charges $10 per month plus the following check fees for a commercial checking account: $.10 each for fewer than 20 checks $.08 each for 20-39 checks $.06 each for 40-59 checks &.04 each for 60 or more checks write a program that asks for the number of checks written ...
*March 10, 2010*

**computer science **

write a program that asks for the starting time and minutes of the call, and displays the charges. the program should ask for the time to be entered as a floating-point number in the form HH.MM. for example, 07:00 hours will be entered as 07.00, and 16:28 hours will be entered...
*March 10, 2010*

**college chem**

. Jack Daniels Tennessee whiskey is 40.00% ethanol by volume. However, % alcohol by mass is quite different from % by volume. The molality of ethanol in an aqueous solution that is 40.00 % ethanol by volume is 10.88 molal. A) Find the % ethanol by MASS, based on the molality. ...
*March 9, 2010*

**college chem**

N2O4 --->2NO2 a 1 liter flask is charged with .4 mols of N2O4. at equilibrium at 373 k, .0055 mols of N2O4 remain. what is the Kc for this reaction? please explain to me how to get the rate law for this and solving
*March 9, 2010*

**math**

OH,,, well i found out what i needed.. THANKS FOR YOUR HELP SO FAR!!!! :)
*March 8, 2010*

**math**

ya but where did you get the 4x? SORRY!
*March 8, 2010*

**math**

how did you get that answer from the question renee posted
*March 8, 2010*

**math**

If the team wins, (A) Then the team remains in the playoffs. (B) If the team stays in the playoffs (B) then the championship is within reach. (c) Therefore, if the team wins, (A) the championship is within reach.(c) It is not logically correct because The A's, C's, and...
*March 8, 2010*

**college chem**

why is PCl5 .1 -.o5 thats what i dont understand i know its .1 bec of the molar but why minus .05 shouldnt it be something close to .1
*March 7, 2010*