Monday

May 30, 2016
Total # Posts: 932

**Chemistry**

At 25 °C, an aqueous solution has an equilibrium concentration of 0.00147 M for a generic cation, A (aq), and 0.000735 M for a generic anion, B2–(aq). What is the equilibrium constant, Ksp, of the generic salt A2B(s)?
*May 6, 2016*

**Chemistry**

What is the equilibrium constant in the following reaction [C][O2]/[CO2] [CO2]/[C][O2] [C]^2[O2]^2/[CO2]^2 [CO2]^2/[C]^2[O2]^2
*May 4, 2016*

**Chemistry**

In an endothermic reaction at equilibrium, what is the effect of raising the temperature? The reaction makes more products the reaction makes more reactants*** the reaction is unchanged the answer cannot be determined
*May 4, 2016*

**Chemistry**

Consider the reaction N2(g)+3H2<-->2NH3(g). What is the effect of decreasing the volume on the contained gases The reaction shifts toward the product gas The system reacts by increasing the number of gas molecules*** the pressure on the gases decreases momentarily ...
*May 4, 2016*

**Chemistry**

If sulfur dioxide and oxygen can be made into sulfur troxide, what is the reverse reaction? 2SO3-->2SO2+O2*** SO3+O2-->SO5 2SO2+O2-->2SO3 SO3+2SO3-->3S+4O2
*May 4, 2016*

**Chemistry**

At equilibrium, what is the rate of production of reactants compared with the rate of the production of products? much higher higher*** the same lower
*May 4, 2016*

**English**

What makes a verb irregular? does not form it's past and present by adding -ed or -d to the past participle does not form it's past and past participle by adding -ed or -d to the present*** does not act as a verb in context functions as a verb but appears as an adjective
*May 4, 2016*

**Chemistry **

Will 1 L of 1 M NaCl contain more chloride ions than .5L of 1M MgCl2? Explain.
*April 19, 2016*

**L.A.**

The answer is 1-B 2-D 3-D
*April 15, 2016*

**Physics**

An electron traveling at 7.00 x 10^6 m/s enters and passes through a parallel plate capacitor. determine the electric field generated by the capacitor. note that the electron just clears the corner of the positive plate. The distance of the parallel plate capacitor is 2.0 cm ...
*April 14, 2016*

**Algebra, functions**

Determine the exact value of k so that the quadratic function f(x) = x2 - kx + 5 has only one zero.
*March 23, 2016*

**Science**

Which of the following can be accurately said about climax communities? A. Climax communities are always stable. (B. Restoration of the original climax community is always achieved at the same rate.) C. Climax communities are always uniform. D. Restoration of the original ...
*March 23, 2016*

**Math**

Write a real- world problem that can be solved by writing and solving the equation 3 + 10 = X +3.
*March 9, 2016*

**Physics **

A 17 g bullet strikes and becomes embedded in a 1.20 kg block of wood placed on a horizontal surface just in front of the gun. If the coefficient of kinetic friction between the block and the surface is 0.23, and the impact drives the block a distance of 8.6 m before it comes ...
*February 24, 2016*

**Art**

Seriously?!? What's the answer to all 5 art questions? Especially on this lesson.
*February 16, 2016*

**Math**

The Problem: You win the grand prize on a game show. You have the following choices: Option 1: $1-million dollars paid as a $25 000 annuity every year over 40 years. Option 2: The present value of option 1 if the current interest rate is 4%, compounded annually. You ...
*February 11, 2016*

**sinusoidal functions**

State an equation of a sinusoidal graph with the following properties. The central axis is at y = 5 Two consecutive minimums are found at (3, −1) and (13, −1 find values for a,b,c and d
*February 6, 2016*

**grade 12 math**

In 2011, the estimated population of Canada was 34 699 000. If the government wants to use an alphabetic string using letters of the alphabet for every person in Canada. How long should the string of letters (repetition allowed) be so that every person in Canada can have a ...
*January 29, 2016*

**math**

Two teams, the Exponents and the Radicals, square off in a best of 5 math hockey tournament. Once a team wins 3 games, the tournament is over. The schedule of the tournament (for home games) goes: E-R-E-R-E If the Exponents are playing at home, there is a 60% chance they'...
*January 25, 2016*

**math**

given a cylindrical waterbottle that has a volume of 1.25L, find the radius and a height that is 4-6 times the radius
*January 16, 2016*

**Chemistry**

Which of the following compounds contains both ionic and covalent bonds? SiO2 LiCN LiI PCl3
*January 15, 2016*

**math**

what is the postulate for this 2(x + 3) = 2x + 6
*January 11, 2016*

**math**

Use words to describe a reasonable domain and range for the number of people painting a house and the time required to finish the job. Explain your answer.
*December 27, 2015*

**math**

1.On the package of candy coated chocolates it states the box contains 147 grams. In reality, the mass can vary between 145 g and 150 g. You may find between 63 and 69 pieces of candy in any given box. Explain which variable represents the domain and range. State the domain ...
*December 27, 2015*

**math**

Express each radical in exponential form. Simplify using the exponent laws when possible. a) √k^2/3 b √ab^2 c 4√81x^8y^12 d 3√x √x
*December 26, 2015*

**math**

. Use words to describe a reasonable domain and range for the number of people painting a house and the time required to finish the job. Explain your answer.
*December 22, 2015*

**math**

On the package of candy coated chocolates it states the box contains 147 grams. In reality, the mass can vary between 145 g and 150 g. You may find between 63 and 69 pieces of candy in any given box. Explain which variable represents the domain and range. State the domain and ...
*December 22, 2015*

**math**

Determine the solution of the following systems of linear equations using elimination. Briefly explain your work. 3x +2y = 19 2x – 3y = -6
*December 22, 2015*

**math**

Determine the solution of the following systems of linear equations using elimination. 2x + 3y = 7 x – 2y – 4 = 0
*December 20, 2015*

**math**

. A drama club was performed in an auditorium that has a capacity of 540. Students had to pay $7 a ticket and adults were charged $10. On opening night, the auditorium was full and they brought in $4764 in ticket sales. Write a system of equations to model this situation and ...
*December 20, 2015*

**math**

that isn't correct because you cannot do 7y/7=-1/7 to get a whole number for y.
*December 20, 2015*

**math**

Determine the solution of the following systems of linear equations using elimination. 2x + 3y = 7 x – 2y – 4 = 0
*December 20, 2015*

**math**

Four years from now Emily will be as old as Cathy is now. Seven years ago, the sum of their ages was 22. Write a system of equations to model this situation and solve it using substitution to determine how old the girls are now.
*December 13, 2015*

**math**

The perimeter of a rectangular cattle enclosure is 400 feet. It is 40 feet longer than it is wide. Using a system of equations solve for the length and width of the enclosure using the substitution method.
*December 13, 2015*

**Physics**

Five moles of an ideal gas are compressed isothermally from A to B, What is the work involved if the temperature of the gas is 332 K? Be sure to include the correct algebraic sign. GRAPH: wvw.webassign.n3t/cj8/15-fc-009.gif wvw and n3t need to be retyped in their proper form ...
*November 30, 2015*

**Music**

Since using such a large scale is not practical, a logarithmic scale in decibels (dB) was introduced which is also in agreement with physiological and psychological hearing sensations. Decibels.
*November 30, 2015*

**Physics ._.**

Damon was close. m= (DAΔC)t/L = 1.24e-9*4.10e-4*1.37*3600/2.06e-2 = 1.217e-7
*November 30, 2015*

**Social Studies**

Are the two dots next to an answer simply you indicating that's what you think is correct?
*November 29, 2015*

**Physics**

Thanks for the response. I wish I had something to go off of. I'm thinking the equation dU=dQ-W has something to do with figuring this out. I'm just unsure where and when to plug things in.
*November 29, 2015*

**Physics**

Replace wvw and n3t in URL with proper letters.
*November 29, 2015*

**Physics**

The pressure and volume of an ideal monatomic gas change from A to B to C, as the drawing shows. The curved line between A and C is an isotherm. IMAGE:wvw.webassign.n3t/cj8/15-p-031.gif a)Determine the total heat for the process in joules. b)State whether the flow of heat is ...
*November 29, 2015*

**math**

on September 30th I want to go to the movies and dinner with my friends. it will cost $25 for dinner and $15 for the movies my balance is $60 willi have enough to go ou
*November 27, 2015*

**french**

Could you translate this question so I know what its asking? Tu trouves dix euros. Qu est-ce que tu as?
*November 25, 2015*

**Math**

Least to greatest and write as a decimal? 3 1/2, 3 1/4, 3 1/3, and 3 2/5
*November 18, 2015*

**Physics**

A person of mass 81.7 kg escapes from a burning building by jumping from a window situated 28.9 m above a catching net.The acceleration of gravity is 9.8 m/s^2. If air resistance exerts a force of 123.1 N on him as he falls, determine his speed just before he hits the net. ...
*November 11, 2015*

**differential calculus**

a man 6 ft tall is walking toward a building at the rate of 4 ft/sec. if there is a light on the ground 40 ft from the building, how fast is the man's shadow on the building growing shorter when he is 30 ft from the building?
*October 14, 2015*

**Physics **

A stone is thrown from ground level at 72 m/s. Its speed when it reaches its highest point is 46 m/s. Find the angle, above the horizontal, of the stone's initial velocity. Answer in units of degree
*October 6, 2015*

**physics**

In lacrosse, a ball is thrown from a net on the end of stick by rotating the stick and forearm about the elbow. If the angular velocity of the ball about the elbow joint is 30.3 rad / s and the ball is 1.35 m from the elbow joint, what is the velocity of the ball?
*October 5, 2015*

**Science**

Be nice Ms.Sue
*October 2, 2015*

**physics**

Only two forces act on an object (mass=4.41 kg), as in the drawing. Find (a) the magnitude and (b) the direction (relative to the x axis) of the acceleration of the object.
*October 1, 2015*

**physics**

Two forces A and B are applied to an object whose mass is 12.3 kg. The larger force is A . When both forces point due east, the object's acceleration has a magnitude of 0.443 m/s2. However, when A points due east and B points due west, the acceleration is 0.280 m/s2, due ...
*October 1, 2015*

**math**

Assume you have a basket full of socks, which have the following properties: 6 of the socks have blue stripes 8 of the socks have red polka dots 16 of the socks have blue polka dots 10 of the socks have red stripes (a). If you take one sock out of the basket, what is the ...
*September 24, 2015*

**math**

A student takes a multiple choice quiz with 12 questions and 5 alternatives per question. Unfortunately, this student has no idea what any of the answers are, so he randomly selects an alternative for each question on the exam. Using this “blind guessing” strategy, ...
*September 24, 2015*

**Math **

The radius of a sphere is 3 cm . the radius is increased by a linear scale factor of 5:2 . calculate the surface area of the new sphere
*September 22, 2015*

**Chemistry**

a 7.83g sample of hydrocyanic acid contains 0.290g and 4.06g of nitrogen. Find the mass of carbonin a sample of HCN with a mass of 3.37g.
*September 13, 2015*

**physics**

A cannon is mounted on a tower above a wide, level field. The barrel of the cannon is 20 m above the ground below. A cannonball is fired horizontally with an initial speed of 900 m/s. Assuming air resistance can be neglected, approximately how long will the cannonball be in ...
*September 9, 2015*

**Physics**

An initially motionless test car is accelerated uniformly to 135 km/h in 8.08 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.695 seconds, after which the car is measured to be traveling at 87.5 km/h. What is the magnitude of the ...
*September 8, 2015*

**Chemistry**

A 2.20 g-sample of a compound containing carbon, hydrogen, and oxygen is burned and it produces 4.61 g CO2 and 0.94 g H2O. What is the empirical formula of this compound? (i.e., C2H4O) I found the mass of Carbon (4.61/44g)*(1 mol C/1 mol CO2)=.1047 I found the mass of Hydrogen...
*September 8, 2015*

**physics**

An unsuspecting bird is coasting along in an easterly direction at 4.00 mph when a strong wind from the south imparts a constant acceleration of 0.300 m/s2. If the acceleration from the wind lasts for 2.70 s, find the magnitude, r, and direction, θ, of the bird\'s ...
*September 8, 2015*

**physics**

35 m
*September 8, 2015*

**physics**

On the Moon, the acceleration due to gravity is 1.62 m/s^2. How far would a 19 g rock fall from rest in 6.5 seconds if the only force acting on it was the gravitational force due to the Moon?
*September 8, 2015*

**Chemistry**

A 2.20 g-sample of a compound containing carbon, hydrogen, and oxygen is burned and it produces 4.61 g CO2 and 0.94 g H2O. What is the empirical formula of this compound?
*September 7, 2015*

**physics**

You throw a baseball directly upward at time t = 0 at an initial speed of 13.3 m/s. What is the maximum height the ball reaches above where it leaves your hand? At what times does the ball pass through half the maximum height? Ignore air resistance and take g = 9.80 m/s2.
*September 7, 2015*

**physics**

12.06 for speed 2.01 for time
*September 7, 2015*

**physics**

While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 7.65 m/s. The stone subsequently falls to the ground, which is 11.1 m below the point where the stone leaves your hand. At what speed does the stone impact the ground? How ...
*September 7, 2015*

**Math**

How do I solve for the limit of ((x^500)-1)/(x-1)?
*September 2, 2015*

**Math**

How do I find the vertical asymptote of f(x) ={x^4}/{x^2 + 8}?
*September 2, 2015*

**Math**

Nevermind I found the answer by graphing
*August 31, 2015*

**Math**

The definition of the derivative, applied to f(x) = 7^x, results in the formula f'(x) = k \cdot 7^x where k = lim of ((7^h-1)/(h) h approaches 0 The value of the constant k cannot be determined using the usual tricks for evaluating limits. Using your calculator, ...
*August 31, 2015*

**Science**

What elements have the highest ionization energy and why?
*August 30, 2015*

**Chemistry**

How many atoms are present in 0.3333 mol of CO2? I know I need to use the conversion factor of 6.021x10^23 but do I just multiply that times .3333? =2.007?
*August 30, 2015*

**Chemistry**

The mineral cassiterite is a compound of tin and oxygen. Chemical analysis of cassiterite shows that the mass percentages of tin, Sn, and oxygen, O, are 78.8% and 21.2%, respectively. Determine the formula of this compound. I found the molar mass and correct equation SnO4. Sn-...
*August 30, 2015*

**Chemistry**

A compound is found to contain 50.05 % sulfur and 49.95 % oxygen by mass. What is the simplest (empirical) formula for this compound? They said to assume that it is 100 grams. I found the molar mass. S- 32.06 0-16.00 But now I don't know what to do. Please help. Thank you!
*August 27, 2015*

**Math**

1:3
*August 27, 2015*

**math**

2/5-2/15+3/10
*August 26, 2015*

**Chemistry**

What is a good website to practice limiting reagent problems?
*August 25, 2015*

**Math **

what is a good website to practice limits?
*August 25, 2015*

**Math**

How do I know if a graph has removable continuity, jump, or infinite? What is the difference?
*August 19, 2015*

**Science**

The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound? Molar mass of CO2= 44.01 Molar mass of H20= 18.01 2.58g/44.01=0.586 mol CO2 .53g/18.01=.0294 mol H2O I Don't know where I went ...
*August 19, 2015*

**math**

A room is 12 feet long and 10.5 feet wide. A scale model of the room is 3.5 feet wide. What is the area of the scale model? 10.3 square feet 14 square feet 36 square feet 122.5 square feet
*July 20, 2015*

**Geometry **

If mADC = 7x+3 and mDCB = 5x+9, then mDAB = ?
*May 14, 2015*

**SOLVE -MATH**

A physics exam consists of 9 multiple choice questions and 6 open-ended problems in which all work must be shown.If an examinee must answer 6 of the multiple- choice questions and 3 of the open-ended problems, in how many ways can the questions and problems be chosen?
*April 30, 2015*

**Algebra 2/Statistics**

From a squad of 12 cheerleaders, 10 will assemble themselves into a 4-level pyramid at the Homecoming rally. 1.) How many different combinations of cheerleaders can be used to build the pyramid? For this I got 12C10=66......Right or Wrong? 2.) The coach decides that Alexis ...
*April 30, 2015*

**Algebra 2/statistics**

On a fair 6-sided die, each number has an equal probability p of being rolled. when a fair die is rolled n times, the most likely outcome (the mean) is that each number will be rolled NP times, with a standard deviation of sqrt NP(1-P). Brandon rolls a die 200 times. He will ...
*April 30, 2015*

**maths**

One number is greater than another by 4, their sum is 32. What are the two numbers? Write a function which could solve this for any two numbers (x and y) with any difference between them.
*April 20, 2015*

**Science**

Actually that's perfect. Haha Thank You Rykr :D
*April 2, 2015*

**Science**

What is the effect of the slope of an incline of a surface on an object’s speed?” PLEASE do not answer...I just need help understanding it. Thank You
*April 2, 2015*

**Math**

How do you find the surface area of a triangular prism?
*March 24, 2015*

**excel**

what formula would be used to calculate the calories from fat for food items which is equal to the grams of fat multiplied by 9
*March 19, 2015*

**Math**

The opposite sides of a square, a rectangle, a parallelogram, and a rhombus are what type of triangle?
*March 17, 2015*

**biology**

Hello, I am having trouble with a question on my homework. Even after reading through my notes and textbook I am still not sure what the answer is. I think the answer is the new paramecium is able to reproduce sexually and asexually.Here is the question: After sexual ...
*March 15, 2015*

**calculus**

If 3x^2 + y^2 = 7 then evaluate the second derivative of y with respect to x when x = 1 and y = 2. Round your answer to 2 decimal places.
*March 10, 2015*

**Accounting**

On December 31, 2013, Ruby Inc. issued 3,000 $1,000 par value bonds with a stated rate of 6% and a 10-year maturity. Interest is payable semiannually on June 30 and December 31.
*March 8, 2015*

**Calculus 2**

Let a thing rod of length a have a density distribution function p(x)+10e^(-.1x), where x is measured in cm and p in grams per centimeter. A) if the mass of the rod is 30 g, what is the value of a? B) For the 30g rod, will the center of mass lie at its midpoint, to the left, ...
*February 23, 2015*

**Physics**

A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m/s2. 1) What acceleration would the force give to an object with a mass of (m2-m1)? 2) A certain force gives mass m1 an acceleration of 13.0 m/s2 and mass m2 an acceleration of 3.6 m...
*February 21, 2015*

**Physics**

A 5.0- kg concrete block rests on a level table. A 3.7- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is measured to be 1.0 m/s2, what is the coefficient of friction between the block and the table?
*February 21, 2015*

**Physics**

Two boxes, A and B, are connected to each end of a light vertical rope. A constant upward force 90.0N is applied to box A. Starting from rest, box B descends 11.0m in 3.50s . The tension in the rope connecting the two boxes is 30.0N a) What is the mass of box A? b) What is the...
*February 17, 2015*

**AP European History**

How did medieval Europe lay the groundwork for the rebirth of Europe (Renaissance)? What conditions existed that allowed Europe to evolve out of medieval conditions?
*February 11, 2015*