Sunday

November 29, 2015
Total # Posts: 2,430

**CHEMISTRY**

What coefficients are needed to balance the equation for the complete combustion of methane? Enter the coefficients in the order CH4,O2,CO2, and H2O,respectively. Express your answer as four integers, separated by commas (e.g., 1,2,3,4).
*October 13, 2011*

**chemistry**

For a week acid whose ionization constant is 1.75 x 10(-5), the pH of its solution is 3.0. Determine its degree of ionization and its percent ionization.
*October 13, 2011*

**chemistry**

Write an equation for the hydrolysis of each of the following salt: i) NaCH2H3O2; ii) Na2CO3; iii) NH4Br
*October 13, 2011*

**chemistry**

Determine the mass of KHP (molar mas = 204.2 g/mol) that is required to react with 30.0 mL of 1.0 M Na0H (molar mass 40.0 g/mol)if the reaction is NaOH + KHP --> NaKP + H2O
*October 13, 2011*

**chemistry**

Account for the increase in reaction rate brought about by a catalyst.
*October 13, 2011*

**chemistry**

Explain the difference between the rate of a reaction and its rate constant.
*October 13, 2011*

**geometry**

M is the midpoint of AB. AM=5x and MB=3x+4. find x.
*October 12, 2011*

**Chemistry**

a titration experiment 20 mL solution of hydrochloric acid required 15.2mL of a .879 M barium hydroxide solution. What was the molar concentration of the HCl solution?
*October 11, 2011*

**chemistry**

The energy levels the electron can occupy in the H atom can be calculated using the energy level equation. Calculate the wavelength (nm) of the photon absorbed when the electron goes from a n= 1 energy level to a n= 3 energy level. Express answer in scientific notation. ...
*October 11, 2011*

**Calculus**

Find the indicated limits. If the limit does not exist, so state, or use the symbol + ∞ or - ∞. f(x) = { 2 - x if x ≤ 3 { -1 + 3x - x^2 if x > 3 a) lim 3+ f(x) x->3 b) lim 3- f(x) x->3 c) lim f(x) x->3 d) lim ∞ f(x) x->3 e) lim -∞ f...
*October 9, 2011*

**algebra**

Simplify each expression. Justify your steps using the Commutative, Associative and Distributive Properties when necessary 8k2 + 4k - 3k2 + 3^2 - k + 5 Please let me
*October 8, 2011*

**algebra**

write an expression that has five terms and simplifies to 5m3 + 4n. Please give me the steps
*October 8, 2011*

**Calculus**

f a rock is thrown upward on the planet Mars with a velocity of 7 m/s, its height in meters t seconds later is given by y = 7t − 1.86t^2. (Round your answers to two decimal places.) Estimate the instantaneous velocity when t = 1.
*October 8, 2011*

**geometry**

Triangle XYZ above is similar to triangle UVW (not shown). If the length of one side of triangle UVW is 60, then what is one possible perimeter of triangle UVW
*October 7, 2011*

**Math **

Would it be plausible for Car B to catch Car A within .5 mile?
*October 6, 2011*

**Math **

Car A is travelling at a constant speed of 100mph at the time it passes a stationary vehicle (Car B). If the Car B hopes to catch Car A within a mile, how fast must Car B travel? Assume Car B can accelerate from 0-60mph in 6 seconds.
*October 6, 2011*

**Chemistry**

What are the molecular and net ionic equations for potassium chloride + ammonium phosphate
*October 4, 2011*

**Chemistry**

How many number of ions of each type are present in the following aqueous solution? 113 mL of .490 M aluminum chloride.
*October 4, 2011*

**Math**

12r-4r=48 What is r?
*October 4, 2011*

**math**

construct-angle-f-so-that-m-angle-f-equals-2-m-angle-c
*October 3, 2011*

**budgeting**

Whats the answer please.
*October 3, 2011*

**physical geology**

Select a city or region that is faced with one of the following issues: o Saltwater invasion in coastal wells o Depletion of an aquifer for drinking or agricultural water o Subsidence associated with water pumping o Depletion or pollution of surface water from human use o ...
*October 2, 2011*

**MATH-**

A ROCK IS DROPPED INTO A DRY WELL. THE TOTAL TIME TO REACH THE BOTTOM NAD FOR THE SOUND TO TRAVEL BACK TO THE TOP IS 6.7 S. WHAT IS THE DEPTH OF THE WELL TO THE NEAREST FOOT.
*September 29, 2011*

**physics**

Two cars are initially moving at constant speeds of 50 m/s (first car) and 30 m/s (second car) along a straight track with the first car being behind. At a certain point (e.g. point A) on the track the first car overtakes the other one. At this very moment of time the first ...
*September 29, 2011*

**Physics**

Two students are on a balcony 24.9 m above the street. One student throws a ball, b1, vertically downward at 19.6 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed. The second ball just misses the balcony on the way down. (a) ...
*September 29, 2011*

**earth**

Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 11 Earth radii from Earth's center?
*September 29, 2011*

**ivcc**

What is the magnitude of the apparent weight of a 76 astronaut 3200 from the center of the Earth's Moon in a space vehicle accelerating toward the Moon at 3.6 ?
*September 28, 2011*

**Chemistry**

How many moles of Io3 are present in a 100mL solution containing 1.390g of KIO3
*September 28, 2011*

**Science**

How many moles of Io3 are present in a 100mL solution containing 1.390g of KIO3
*September 28, 2011*

**chemistry**

What is the mass of 1.2 grams of oxygen if it occupies a volume of 500 cubic centimeters at s.t.p?
*September 27, 2011*

**algebra**

Explain how to find the sum using game chips, then give the answer 8+-10
*September 26, 2011*

**sociality**

what are the dimentions of cultural diversity?
*September 25, 2011*

**science**

Pure gold has a density of 19.32 g/cm3. How large would a piece of gold be if it had a mass of 483 g?
*September 21, 2011*

**algebra**

= 25/12 x (-7) = -175/12 = -14.583333
*September 21, 2011*

**physics**

a uniform ladder 16 m long weighing 80 N leans against a smooth vertical wall, making 30 degree with the wall. Find the thrust of the wall, and the force of the point on the ground.
*September 21, 2011*

**statistics**

The scores on the final exam in a course have approximately a bell-shaped distribution. The mean score was 72, the highest score was 99, and the lowest score was 41. Use the value of the range (58) to estimate the value of the standard deviation. (Round your answer to the ...
*September 21, 2011*

**geometry**

there for B and C is 18
*September 21, 2011*

**geometry**

i think you have your nummbers mixed up for its not posible to have A and C shorter then A and B since A and B are part of the line
*September 21, 2011*

**physics**

1. A ball rolling on a platform at 4 m/s rolls off of the platform at 4 m/s and hits the ground 8 m from the base of the platform. a. How long does it take the ball to hit the ground? b. How high is the platform?
*September 21, 2011*

**physics **

a car traveling 7.0 m/s accelerates uniformly at 2.5 m/s squared to reach a speed of 12 m/s. how long does it take for the acceleration to occur?
*September 20, 2011*

**finance**

You borrow $185,000 to buy a house. The mortgage rate is 6.5 percent and the loan period is 32 years. Payments are made monthly. If you pay the mortgage according to the loan agreement, how much total interest will you pay?
*September 20, 2011*

**MATH**

Triangle T has vertices A(-9, 10)B(1,0)and C(5,4). Points A, B, and P(also on th xy plane) form a triangle that is congruent to triangle T. Find all the possible coordinates for P.
*September 15, 2011*

**Ottawa University **

Triangle T has vertices A(-9, 10)B(1,0)and C(5,4). Points A, B, and P(also on th xy plane) form a triangle that is congruent to triangle T. Find all the possible coordinates for P.
*September 15, 2011*

**Physics for Engineers**

For c.) Set the y component to 5.2m 5.2= 18.13sin53(t)-4.9(t)^2 solve the quadratic for t and plug into d=18.13cos53(t) This will give you the horizontal distance until the ball lands on the roof.
*September 14, 2011*

**Physics for Engineers**

For b.) You got the y component correct however you multiplied it by sin53 a second time. The correct equation should be y=18.13sin53(2.2)-4.9(4.8) or with the y component solved for already, y=14.48(2.2)-4.9(4.8) The ball is at height= 8.336m It clears the wall by 8.336-6.7=1...
*September 14, 2011*

**brain teaser**

Bono (1) walks over with Edge (2), 2 minutes, Bono walks back, 1 minute (3 total), Larry (10) and Adam (5), walk across, 10 minutes (13 total), Edge Walks Back, 2 minutes (15 total), Edge and Bono walk back, 2 minutes (17 total)
*September 14, 2011*

**science**

How do you calculate the gravity of an object? equation needed h=1/2 gt^2 Solve the equation for g; g=2h/t^2 Set height is 2 foot, dropped small object from 2ft, timed at 0.3 seconds. Calculate the gravity of the object. Is this right? 2=1/2*9.8 t^2 t^2=2*2/9.8=0.40 t=0.40^ ...
*September 12, 2011*

**science**

Simpson drives his car with an average velocity of 48.0 km/h to the east. How long will it take him to drive 144 km on a straight highway?
*September 11, 2011*

**science**

It take you 9.5 min to walk with an average velocity of 1.2 m/s to the north from the bus stop to the museum entrance. What is your displacewment?
*September 11, 2011*

**scientist**

Which of the following BEST describes the theory of natural selection?
*September 11, 2011*

**Math**

How many two block towers can you make from: 1 black block,1 red block, and 1 blue block? Please explain.
*September 8, 2011*

**Math**

I have a shirt, a skirt, a blouse and a pant. How many different outfits can I make?
*September 8, 2011*

**math**

a(1,7),b(-3,1) coordinates of missing endpoint if b is the midpoint of ac
*September 8, 2011*

**5th grade math**

.4 equals how many hundreths? .07 equals how may thousandths? Do you just multiply the .4 by 100 and do you just multiply the .07 by 1000?
*September 7, 2011*

**Science**

Two tugboats are towing a ship. Each exerts a horizontal force of 5 tons and the angle between their towropes is 90°. What net force is exerted on the ship?
*September 3, 2011*

**Physics**

A child bounces a 55 g superball on the side- walk. The velocity change of the superball is from 22 m/s downward to 14 m/s upward. If the contact time with the sidewalk is 1 800 s, what is the magnitude of the average force exerted on the superball by the sidewalk? Answer in ...
*August 30, 2011*

**statistics**

You have been approached by the editor of gentlemen's magazine to carry ot a research study. The magazine has been unsuccessful in atracting shoe manufacturers as advertisers. When the sales force tried to secure advertising from shoe manufacurers, they were told men's...
*August 26, 2011*

**trig**

A ferris wheel with a diameter of 100 feet rotates at a constant rate of 4 revolutions per minute. Let the center of the ferris wheel be at the origin. 1. Each of the ferris wheel's cars travels around a cirlce. a) Write an equation of the circle where x and y are measured...
*August 20, 2011*

**Algebra**

T=6+20/n+2. Solve please
*August 11, 2011*

**math**

given the function f(x)= x+2, find each of the following f(7), f(-6), f(0)
*August 8, 2011*

**Math**

Please factor X^2+3x+2
*August 4, 2011*

**Math**

How do I solve X^2+3x+2
*August 4, 2011*

**Math**

X^2+3x+2
*August 4, 2011*

**Algebra**

Maria bicycles 5 km/h faster than Robert. In the same time it takes Robert to bicycle 60 km, Maria can bicycle 75km. How fast does each bicyclist travel?
*August 4, 2011*

**math**

none of ur business
*August 2, 2011*

**math 209**

The perimeter of a rectangle is 44ft the length is 4ft longer than the width. Find the demensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.
*July 17, 2011*

**218**

I have a question for Mrs. Sue. When you used quotations around University when describing Ashford were you trying to suggest something? I am about to finish my accounting degree there and have often wondered if I will fin discrimination because of the stigma that is ...
*July 15, 2011*

**math**

what is a proof of the pythagoarean theorem?
*July 14, 2011*

**Geometry**

What is Two capital letters printed in sequence
*July 6, 2011*

**Geometry**

M and N are the midpoints of PR(which has a line over PR) and QR(which has a line over QR)respectively. Using graph paper, repeat this process from the last problem using different coordinates for P, Q, and R. How do these lengths MN and PQ compare now? What do you think you ...
*July 6, 2011*

**Geometry**

M and N are the midpoints ofandrespectively. Using graph paper, repeat this process from the last problem using different coordinates for P, Q, and R. How do these lengths MN and PQ compare now? What do you think you can conclude about the lengths of these segments? (In your ...
*July 6, 2011*

**Geometry**

Use the diagram below for the following question. P(2,1), Q(11,1), and R(8,7) M and N are the midpoints of PR (which has a line over PR)and QR (which has a line over QR) respectively. Find MN and PQ. How do these lengths compare with each other
*July 6, 2011*

**Geometry**

Use the diagram below for the following question. P(2,1), Q(11,1), and R(8,7) M and N are the midpoints ofandrespectively. Find MN and PQ. How do these lengths compare with each other?.
*July 6, 2011*

**Chem**

What is the wavelenght of a radio station operating at a frequency of 99.6 MHz?
*July 3, 2011*

**Chem**

A certain shell is known to have a total of 16 orbitals, which shell is it?
*July 3, 2011*

**Chem**

What is the speed of an argon atom that has a de Broglie wavelength of 5.2 pm?
*July 3, 2011*

**math**

Find the number of round trip commuter rail tickets sold. 1.Thirty times as many round trip tickets as 12 ride tickets were sold. 2.The total number of tickets sold represented 1440 rides Example of chart below Rides per ticket x Number of tickets sold = Total rides 12 ride ...
*June 30, 2011*

**algebra**

the length of a rectangle is twice its width w. A second triangle, which is 8cm longer and 3 cm narrower than the first triangle, has a perimeter 154 cm. What is the dimension of each triangle.
*June 30, 2011*

**algebra **

a boat weighs 1500 lbs more than its motor and 1900 lbs more than its trailer. Together the boat and motor weigh five times as much as the trailer. How much does the boat weigh? Please explain or show how to set up the equation.
*June 30, 2011*

**algebra**

the greater of two consecutive integers is 20 more than twice the smaller. what are the integers
*June 30, 2011*

**Chem**

What is the mole fraction of H2 in a mixture with the total pressure of 800 torr when the partial pressure of H2 is 90 torr?
*June 29, 2011*

**Chem**

In an experiment, 7.5 mol of a gas are held in a 3.5 L container at 39 c. What pressure does the gas exert if it is assumed to be ideal?
*June 29, 2011*

**Chem**

In an experiment, 25.0 ml of a gas with a pressure of 1. atm is contained in a balloon at 25.0 c. The Balloon is then cooled to 5.0 c, and the pressure is found to be .750 atm. What is the volume of the gas under the new conditions?
*June 29, 2011*

**Chem**

What is the volume of a gas that exerts a pressure of 457 mm Hg, if it excerted a pressure of 250 atm when its volume was 25.0 ml.
*June 29, 2011*

**Chem**

A Baloon is filled with 3.00 L of helium at a pressure of 765 Torr. What is the volume of the baloon at an altitude where the atmospheric pressure is 530 torr?
*June 29, 2011*

**statistics**

Classify the variable as nominal, ordinal, discrete, or continuous, and explain: Customer’s driver’s license number
*June 28, 2011*

**chemistry**

How many grams of HCl must be added to make 1 liter of a 2.0 M HCl solution
*June 23, 2011*

**College Physics**

100 grams of molten lead (600oC) is used to make musket balls. If the lead shot is allowed to cool to room temperature (21oC), what is the change in entropy (in J/K) of the lead? (For the specific heat of molten and solid lead use 1.29 J/g oC; the latent heat of fusion and the...
*June 12, 2011*

**Calculus ll**

find the second order derivative, rxy(x,y) for r(x,y)=xy/8x+5y
*June 9, 2011*

**Algebra**

Find the equation of the line given pair of points. (2,5) and (6,6) Y=?
*June 8, 2011*

**ANT 101**

A, A,b,b,d
*June 8, 2011*

**Calculus ll**

Find the partial derivative of the function with respect to each of the independent variables.f(x,y)=xe^2y
*June 7, 2011*

**businesscommunication**

Main idea(s), background information, negative elements, benefits, goodwill ending
*June 4, 2011*

**Math**

(5y-4) squared simplified the answer is not 25ysquared+16
*May 26, 2011*

**algebra**

(5y-4) squared simplified
*May 26, 2011*

**algebra**

Two angles are complemtary. The large angle is 1 less than 6 times the smaller angle. which system could be used to determine the larger angle X and the smaller angle Y?
*May 26, 2011*

**finance**

Refer to Figure 7-1 of Personal Finance. Why is it important to go through these steps when you are planning on making a large purchase? Provide at least one example to support your response.
*May 25, 2011*

**Physical Science 2nd Semester**

A student lifts a backpack with a force of 50 Newtons. She lifts the backpack 2 meters off the floor. Calculate the work that she has done.
*May 24, 2011*

**Science**

What does Hubble's law tell us?
*May 22, 2011*