Saturday

April 25, 2015

April 25, 2015

Total # Posts: 444

**chemistry**

Suppose 50mL of 8.4 x 10^-7 M Pb(NO3)2 (aq) is mixed with 200 mL of 9.7 x 10 ^-4 M Na2CO3 (aq). Calculate Q and determine whether a ppt of PbCO3(s) will form.
*April 11, 2015*

**Physics**

Two capacitors (c1 = 19 and c2 = 8 μF) are charged in series by a 14 V battery. Find the time constant of the charging circuit. (5 ohms)
*February 16, 2015*

**Geometry**

Al's garden is 18 feet long and 30 feet wide he wants to put a fence post that same distance apart along both the length and the width of the fence what is the greatest distance he can put apart the fence post
*February 5, 2015*

**Math**

Draw a velocity vector to represent the following (1cm represents 10km/h): a) a girl running around a circular track travelling at 15km/h heading due east. In the solutions, it shows it heading south, why is that?
*February 3, 2015*

**Chemistry **

Calculate the mass of Al2(SO4)3 produced when 4.26kg of Al(NO3)3 is added to an excess of K2SO4.
*January 9, 2015*

**algebra**

A field goal is 3 points and the extra point after a touchdown is 1 point. a player made 21 field goals and extra point kicks for 49 points. Find the number of field goals and extra points that he made. FG= x extra point =y =49 x+y=49 did i set up the equation correctly
*December 18, 2014*

**finance math**

Meg's pension plan is an annuity with a guaranteed return of 7% interest per year (compounded annually). She would like to retire with a pension of $30000 per annum for 15 years. If she works 31 years before retiring, how much money must she and her employer deposit per ...
*November 12, 2014*

**Statistics **

Where can I find the ti83 plus input functions for beginning statistics course
*October 30, 2014*

**math**

thanks...i figured it out
*October 5, 2014*

**math**

I am looking for the balance owed and what was paid.
*October 5, 2014*

**math**

If I borrowed $15000 in April 2008 at 6% interest and have paid $150 per month since then, how much have I paid and how much do I owe?
*October 5, 2014*

**marketing and research.**

I am interested in assessing the influence of children on a family's purchasing decision at a grocery store. How would you investigate this problem by communication and observation?
*September 29, 2014*

**physocology**

Race usually refers to the biological characteristics that distinguish one group from another is this true or false
*September 2, 2014*

**ctc**

The unconscious memories that can surface to reveal hidden meaning or intentions describes which is the correct answer the psychodynamic perspective the psychosocial model cognitive development ecological systems theory evolutionary approaches
*September 2, 2014*

**Math **

write an algebraic expression for 43 more than t 43 + t
*August 28, 2014*

**statistics**

A company director took a sample of salaries of 13 employees in a big school during a certain time. she divided the wages into three groups according to the different jobs: teachers, assistants and coordinators as displayed in the table below. She wanted to find out whether or...
*May 27, 2014*

**tax**

I too am having a hard time with the Marion drives 20 miles a day to 2 jobs for 125 days of the year. What is his deductible using the standard mileage rate assuming he incurred ratably throughout the year. I take 125 x 20 x 0.51 and come up with 1275.
*April 30, 2014*

**physics**

Two charged bodies exert a force of 0.225 N on each other. If they are moved so that they are one-third as far apart, what force is exerted?
*March 23, 2014*

**Grade 12 Math Please help!!**

Please can anyone answer this which I have posted previously? Anyone with knowledge of this area of maths? Thanks in anticipation. :) Formula given: The decibel (dB) scale for measuring loudness, d, is given by the formula d = 10 log base ten(I X 12 to the power of 12) where I...
*February 17, 2014*

**Math**

Formula given: The decibel (dB) scale for measuring loudness, d, is given by the formula d = 10 log base ten(I X 12 to the power of 12) where I is the intensity of sound in watts per square metre. a) Find the number of decibels of sound produced by a jet engine at a distance ...
*February 16, 2014*

**Maths**

Find the number of decibels of sound produced by a jet engine at a distance of 50 metres if the intensity is 10 watts per square metre. This time I'll post the given formula too. Sorry to leave it out before! The dB scale for measuring loudness, d, is given by the formula...
*February 15, 2014*

**Maths**

Find the number of decibels of sound produced by a jet engine at a distance of 50 metres if the intensity is 10 watts per square metre.
*February 15, 2014*

**special ed.**

Some years back i made each letter in the alphabet on index.....i folded the cards and then did cutting......I forget how to do it .....can you help ?
*February 11, 2014*

**Engl**

I believe that is what the teacher wants, the main clause. Thank you very much.
*January 28, 2014*

**Engl**

Simple subject and predicate? Officals hope the new shopping mall will increase pedestrian traffic and lure shoppers to the downtown area. ss...officals sp...hope
*January 28, 2014*

**Engl.**

Simple subject and predicate? The customs officals planned to seize a huge shipment of heroin when it arrived. SS...officals sp...planned
*January 28, 2014*

**Engl.**

Simple subject and predicate? The villagers were afraid the volcano would erupt. simple subject....villagers simple predicate...were
*January 28, 2014*

**English**

I believe that the simple predicate is "had" in the main clause. In the subordinate clause... "was cheating". What about "to banish"? is this an infinitive? Or an infinitive used as a direct object?
*January 28, 2014*

**English**

Simple predicate? We had to banish Mel from the game because he was cheating.
*January 28, 2014*

**physics**

A metal sphere hangs from a string and has 2 kg of mass. The sphere has a charge of +7.1 µC. A uniform electric field is turned on and directed to the right.
*January 16, 2014*

**physics**

A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The sphere hangs from the ...
*December 9, 2013*

**physics**

A 0.67-kg metal sphere oscillates at the end of a vertical spring. As the spring stretches from 0.10 to 0.21 m (relative to its unstrained length), the speed of the sphere decreases from 5.35 to 4.55 m/s. What is the spring constant of the spring? (The sphere hangs from the ...
*December 5, 2013*

**physics**

A tray is moved horizontally back and forth in simple harmonic motion at a frequency of f = 1.86 Hz. On this tray is an empty cup. Obtain the coefficient of static friction between the tray and the cup, given that the cup begins slipping when the amplitude of the motion is 5....
*November 26, 2013*

**physics**

A spring stretches by 0.018 m when a 3.6-kg object is suspended from its end. How much mass should be attached to this spring so that its frequency of vibration is f = 2.9 Hz?
*November 26, 2013*

**physics**

The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 303 kg. A person pushes down on the middle of the front ...
*November 26, 2013*

**physics**

A 30.0-kg block is resting on a flat horizontal table. On top of this block is resting a 15.0-kg block, to which a horizontal spring is attached, as the drawing illustrates. The spring constant of the spring is 340 N/m. The coefficient of kinetic friction between the lower ...
*November 26, 2013*

**physics**

To measure the static friction coefficient between a 1.6-kg block and a vertical wall, the setup shown in the drawing is used. A spring (spring constant = 400 N/m) is attached to the block. Someone pushes on the end of the spring in a direction perpendicular to the wall until ...
*November 26, 2013*

**Liquid capacity of pitcher**

If a ceramic pitcher is 9.5 inches tall and has a diameter that is 3 3/4 at top and 4 inches at the bottom how many ounces will it hold. There use to be a gallon ratio to inches and you could deduct 30 percent for variating diameters. Do you know the conversion?
*November 17, 2013*

**Loans**

I don't know
*November 5, 2013*

**Loans **

A borrower received a 30-year ARM mortgage loan for $120,000. Rate caps are 3/2/6 (first adjustment/subsequent adjustments/total over the life of the loan). The start rate was 3.50% and the loan adjusts every 12 months for the life of the mortgage. The index used for this ...
*November 5, 2013*

**physics**

A girl is skipping stones across a lake. One of the stones accidentally ricochets off a toy boat that is initially at rest in the water (see the drawing below). The 0.058-kg stone strikes the boat at a velocity of 15 m/s, 15° below due east, and ricochets off at a velocity...
*November 4, 2013*

**Math**

Is it sometimes, always or never true that a number is a factor and a multiple of itself?
*October 15, 2013*

**Physics**

A block is released from the top of a frictionless incline plane as pictured above. If the total distance travelled by the block is 1.2 m to get to the bottom, calculate how fast it is moving at the bottom using Conservation of Energy.(incline 20 degrees mass of block is 2.5kg)
*October 15, 2013*

**physics**

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 20.0 m. She pushes in a direction 28.0° below the horizontal. A 54.0-N frictional force opposes the motion of the cart.
*October 11, 2013*

**physics**

In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.36 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle of è ...
*October 11, 2013*

**physics**

Pilots of high-performance fighter planes can be subjected to large centripetal accelerations during high-speed turns. Because of these accelerations, the pilots are subjected to forces that can be much greater than their body weight, leading to an accumulation of blood in the...
*October 11, 2013*

**Physics**

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to six times her weight as she goes through the dip. If r = 22.0 m, how fast is the roller coaster ...
*October 11, 2013*

**Physics**

The person in the drawing is standing on crutches. Assume that the force exerted on each crutch by the ground is directed along the crutch, as the force vectors in the drawing indicate. If the coefficient of static friction between a crutch and the ground is 0.94, determine ...
*October 11, 2013*

**physics**

The drawing shows a wire tooth brace used by orthodontists. The topmost tooth is protruding slightly, and the tension in the wire exerts two forces vector T and vector T ' on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 24.0...
*October 11, 2013*

**Physics**

The helicopter in the drawing is moving horizontally to the right at a constant velocity. The weight of the helicopter is W = 59000 N. The lift force vector L generated by the rotating blade makes an angle of 21.0° with respect to the vertical.
*October 11, 2013*

**physics**

In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 42 m/s (around 90 mi/h) in a time of 7.3 s. The mass of the car and riders is 5700 kg. Find the average net force exerted on the car and riders by the ...
*October 11, 2013*

**Physics**

A person pushes a 16.0-kg shopping cart at a constant velocity for a distance of 20.0 m. She pushes in a direction 28.0° below the horizontal. A 54.0-N frictional force opposes the motion of the cart.
*October 10, 2013*

**Physics**

A truck is traveling at a speed of 23.0 m/s along a level road. A crate is resting on the bed of the truck, and the coefficient of static friction between the crate and the truck bed is 0.610. Determine the shortest distance in which the truck can come to a halt without ...
*October 4, 2013*

**science**

A man seeking to set a world record wants to tow a 106,000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. The mass of the man is 77 kg, and the coefficient of static friction between his shoes and the runway is 0.82. What is the ...
*October 4, 2013*

**chemistry**

A student took 100 mL of a solution of Mg(OH)2 and reacted it with HCl (aq) to calculate the concentration of hydroxide ions in the solution. If 13.75 mL of 0.010M HCl was used to react with all of the OH- (aq) in the 100-mL solution, what was the concentration of hydroxide ...
*October 3, 2013*

**ecology**

how do you construct a age pyramid. i have the age class and observed individuals how do i get the present in each age class
*September 29, 2013*

**Physics**

ok according to you the answer must be 1.5 but that is wrong :(
*September 26, 2013*

**Physics**

A 24.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 77.0 N and is directed at an angle of 30.0° above the horizontal. Determine the coefficient of kinetic friction.
*September 26, 2013*

**physics**

but if you have two variables how do you solve? I understand that force=ma so the normal force is (284)(9.8)=2783.2, but I don't really understand how to determine when acceleration is .28
*September 26, 2013*

**physics**

Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 284 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' force. If the buoyant ...
*September 26, 2013*

**Math**

How do you write 22 6/9 into an equivalant fraction?
*September 11, 2013*

**Physics**

escalator that leads down into a subway station has a length of 27.0 m and a speed of 1.7 m/s relative to the ground. A student is coming out of the station by running in the wrong direction on this escalator. The local record time for this trick is 11 s. Relative to the ...
*September 7, 2013*

**Calculus**

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y = 4(x^(1/2)), y=4, and 2y +2x = 6 I keep getting an area around 21.3 but it is incorrect. Am I close? Thank you!
*July 11, 2013*

**Organic Chemistry**

Which odor will be detected first if both containers are opened simultaneously, NH3 or H2S vapors?
*July 7, 2013*

**chemistry**

I need the half reactions for this redox reaction: 2KClO3-----> 2KCl + 3 O2
*June 9, 2013*

**Informal Logic**

<7{6[3(02)66]}> In a survey of 10 film historians, half voted for Nosferatu as the greatest vampire film ever made, and the other half voted for Dracula. However, when asked which lead vampire character they considered more charismatic, all of the film critics chose ...
*April 27, 2013*

**Informal Logic**

<11{5[1(01)57]}> Arthur: The solutions to most mystery novels I read are not believable. However, my enjoyment of a mystery novel depends only on its suspenseful mood and colorful characters. Norton: Roughly 80% of the mystery novels I read have believable solutions, ...
*April 27, 2013*

**Informal Logic**

<21{3[2(08)44]}> Surveys show that people who use calorie information to decide which foods to eat consume on average 100 calories less than they would if they didn’t check calorie information before eating. Strangely though, people who use calorie information in ...
*April 27, 2013*

**Informal Logic**

11{2[3(11)35]}> Some politicians claim to support the environment in speeches they make around the country. However, to get to those speeches they ride in gas guzzling, pollution creating private planes. They therefore clearly don’t believe a word of what they say and ...
*April 27, 2013*

**Informal Logic**

<11{1[3(02)02]}> Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday, there is not a romantic comedy playing at her local theater. The reasoning above is flawed because the evidence (Points : 1) does...
*April 27, 2013*

**Informal Logic**

<11{7[2(03)79]}> Looking to increase the profits of his lemonade stand, Johann doubled the price of a cup of lemonade from 25 cents to 50 cents. This clearly shows Johann’s lack of business sense, for now he’ll almost certainly sell fewer cups at the new price...
*April 27, 2013*

**English**

The only car for him is one of those new GTO's Car=subject for=verb is=linking verb one of those new GTO's=prep phase
*April 24, 2013*

**English**

What are the parts of the sentence. example: verb, subject, prepositional phase, linking verb, subject compliment, direct object, indirect object, object compliment. The committee elected George chairman.
*April 24, 2013*

**applied physics**

a gardener pushes a mower a distance of 900m in mowing a yard. the handle of the mower makes an angle of 40.0 degrees with the ground. the gardener exerts a force of 35.0 N alonf the handle of the mower. how much work does the gardener do in mowing the lawn?
*April 22, 2013*

**applied physics**

the work required to lift eleven 94.0lb bags of cement from the ground to the back of a truck is 4340ft lb. what is the distance from the ground to the bed of the truck?
*April 22, 2013*

**applied physics**

two painters stand on a 10.00m scaffold. one,of mass 65.0kg, stands 2.00m from one end. the other, of mass 95.0kg, stands 4.00m from the other end. they share a paint container of mass 18.0kg located between the two and 2.50m from the larger person. what weight must be ...
*April 22, 2013*

**applied physics**

a 5000lb truck is 20.0ft from one end of a 50.0ft bridge. a 4000lb car is 40.0ft from the same end. how much weight must each end of the bridge support?(neglect the weight of the bridge.)
*April 22, 2013*

**applied physics**

a sky diver jumps out of a plane at a height of 5000 ft. if her parachute does not open until she reaches 1000 ft, what is her velocity at that point if air resisitance is disreguared?
*April 22, 2013*

**applied physics**

an ironworker drops a hammer 5.25m to the ground. what is its speed as it hits the ground?
*April 22, 2013*

** PHI103:**

You should read this book. Everybody likes it so it must be good" may commit which fallacy?
*April 19, 2013*

**Macro Consumption Question**

Assume an economy is in recession with a MPC of .75 and there is a GDP gap of $100 billion. How much must government spending increase to eliminate the gap? Instead of increasing govt. spending by the amount that you calculate, what would be the effect of the govt. cutting ...
*April 16, 2013*

**statistic**

Assume that previous fast-food research has shown that 80 percent of the consumers like curly French fries. The researcher wishes to have a standard error 6 percent or less and be 95 percent confident of an estimate to be made about curly French fry consumption from a survey. ...
*March 25, 2013*

**Marketing**

Assume that previous fast-food research has shown that 80 percent of the consumers like curly French fries. The researcher wishes to have a standard error 6 percent or less and be 95 percent confident of an estimate to be made about curly French fry consumption from a survey. ...
*March 25, 2013*

**statistics**

The average amount spent at a fast-food restaurant in California was $3.30, with a standard deviation of $.40. Yet in Georgia, the average amount spent at a fast-food restaurant was $3.25, with a standard deviation of $.10. What do these statistics tell you about fast-food ...
*March 25, 2013*

**math**

30 + 20 / ((1 * 5) * 2) =
*March 19, 2013*

**Business Math**

Oakwood plowing company purchased two new plows for the upcoming winter. Oakwood must make a single payment of 25,03 to pay for the plows. As of today he has $24,200. Asuume the Oakwood puts the money in the bank today, what rate of interest will it need to pay off the plows ...
*March 14, 2013*

**general chemistry**

When divers exhale beneath the surface of the water, bubbles rise to the surface. Explain this behavior.
*February 27, 2013*

**general chemistry College**

Which of the following mixture would be most likely to produce carbon dioxide? Explain Why? a. magnesium and nitric acid: Mg+ HNO3 b. sodium carbonate and sufuricacid: Na2CO3+H2SO4 c. H2O+ Cu
*February 27, 2013*

**research methods**

determining variables and identifying this type of quasi-exp design for this study is confusing: Study: lower socioeconomic status student benefit more over time from an academic tutoring program than higher socioeconomic students. Now: looks like this is a longitudal exp. DV ...
*February 23, 2013*

**math**

aww thats a shame and well thats good to know thank you again C:
*February 20, 2013*

**math**

It really does thank you. and quick questions do you do tutoring lessons??
*February 20, 2013*

**math**

so 16x^3y^4 thank you !
*February 20, 2013*

**math**

-16x^2y^2x^3y^3??
*February 20, 2013*

**math**

what is the product of -8x^2y and -2xy^3 using the laws of exponents??
*February 20, 2013*

**Math **

-225=-14t-t
*February 13, 2013*

**Math ms sue please help**

the dimensions are 8x6. if you multiply the cost $.085 times 48 you get $40.80.
*February 13, 2013*

**health**

What effects or potential effects do technologically based communication modalities—between patients and health care providers and between health care providers only—have on health care costs
*February 8, 2013*

**Chemistry 107**

1. Suppose you have a box of 10 marbles, a 50mL gradulated cylinder, and some water. How would you measure the volume of a marble? (Assume that all marbles are equal volume.) 2. Suppose a digital balance reads 0.15g when is placed on the balance and the balance reads 24.68g, ...
*February 6, 2013*

**math**

IF 81 PEOPLE NEED TO TAKE A TEST, BUT ONLY 13 HAVE ACTUALLY TAKEN TEST, WHAT IS THE PERCENTAGE OF PEOPLE WHO HAVE TAKEN TEST?
*January 30, 2013*

**ALGEBRA**

SOLVING INEQUALITY 5X+3X+X> OR EQUAL TO 2+3X+16 PLEASE HELP
*January 20, 2013*