Tuesday

February 9, 2016
Total # Posts: 2,253

**social studies**

X-2 roller coaster. The first 4th dimension roller coaster in the world.
*May 5, 2014*

**chemistry**

A beaker with 1.40×102mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.10mL of a 0.370M HCl solution to the beaker. How much will the pH change? The pKa of ...
*April 22, 2014*

**chemistry**

How many grams of dry NH4Cl need to be added to 2.00L of a 0.100M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.86? Kb for ammonia is 1.8×10−5.
*April 22, 2014*

**math**

y - 4x = 8 (t- chart)
*April 15, 2014*

**Chemistry**

If 15.0 mL of a 1.5M HCl solution at 22.5 degrees C is mixed with 25.0mL of a 1.5M NaOH solution at 21.5 degrees C that is in a calorimeter, and the final mixed solution temperature ends up at 28.5 degrees C, 1.)what is the balanced equation for this reaction? 2.) what is the ...
*April 13, 2014*

**Physics**

When a compact disk with a 12.0-cm diameter is rotating at 4.2 rad/s, what is (a) the linear speed and (b) the centripetal acceleration of a point on its outer rim?
*April 10, 2014*

**math**

x/4 +2x =1/3
*March 30, 2014*

**algebra**

x - 1 = x + 5 5 15
*March 30, 2014*

**Math**

Four times a number, diminished by 6, yields the same result as twice the same number increased by 4. Find the number.
*March 30, 2014*

**physics**

Assuming the Earth's magnetic field averages about 0.50×10−4 T near Earth's surface, estimate the total energy stored in this field in the first 15km above Earth's surface. The radius of Earth is 6380 km.
*March 23, 2014*

**math help**

I am a closed shape made of 6 line segments. I have 2 angles less than a right angle and no right angles. What shape am I? Draw an example in the workspace.
*March 19, 2014*

**Language Arts**

What is the simple predicate in this sentence? Branches buried in the mud are food for the winter. a. are b. buried c. for I thought it was buried, but when I submitted the answer for a pre-test it said it was wrong and I'm a little confused.
*March 12, 2014*

**physics**

You must show your work for full credit.) Calculate the circular speed of an object that orbits the Sun at a distance of 0.2 AU (1 AU = 1.5e+11 meters, the distance between the Earth and the Sun)
*March 7, 2014*

**Physics**

A pendulum bob with a mass of 0.4 kg is released from a position in which the bob is 20 cm above the low point in its swing. What’s the speed of the bob as it passes through the low point in its swing?
*March 2, 2014*

**maths**

There are 6 terms in an A.P. 6th term is 3 times the second term and 4th term is 4 times the first term. if the 5th term is 15 find the terms
*February 25, 2014*

**Algebra**

36-x^2 in.
*February 15, 2014*

**Math**

If f(x)=-3x+5 and g(x)=9x-2, what is the slope of the graph of the function (f-g)(x)?
*February 14, 2014*

**Math**

The instantaneous rate of change of g(x) is the same for every real value of x. What type of function is g(x)?
*February 14, 2014*

**Math**

If f(x)=x+4 and g(x)=x-4 a)Find an expression for (f*g)(x)? b)what is the minimum value of the function (f*g)(x) I used the * sign for a times symbol.
*February 14, 2014*

**Math**

The tires on a car? or Thew wings of an airplane?
*February 14, 2014*

**Math**

State two types of functions that you know that do not have a maximum or a minimum when the domain is the set of all real numbers.
*February 14, 2014*

**Math**

For each pair of functions give a characteristic that the two functions have in common and a characteristic that distinguishes them. a) f(x)=1/x and g(x)=sinx b) f(x)=x and g(x)=[x] c) f(x)=2^x and g(x)=sinx
*February 14, 2014*

**Calculus**

x=0, 2, -2
*February 14, 2014*

**Math**

I think its as a function of time
*February 14, 2014*

**Math**

A bicyclist is competing in a tournament. He is currently in a very hilly part of the tournament's course. For his current hill, his height in metres over time in minutes is modelled by the function; f(x)=-0.00075x^2-0.5825x+17.269 a) Estimate the bicyclists instantaneous ...
*February 14, 2014*

**Math**

State two points on the graph of y=sinx that will give an average rate of change of 0?
*February 14, 2014*

**Math**

Got it! thanks for the correction.
*February 14, 2014*

**Math**

Awesome Thanks!!
*February 14, 2014*

**Math**

Determine the value of 'a' so that the average rate of change of the function h(x)=x^2+3x+2 on the interval -3<=x<=a is -1
*February 14, 2014*

**Math**

A batter hits a baseball straight up into the air. The height of the ball in metres above the ground is given by h(t)=-4.9t^2+23t+2, where t is the number of seconds after the ball is hit. a) What is the average rate of change in the height of the ball over the interval 1.5<...
*February 14, 2014*

**physics 2 for college**

What’s the potential energy of a ball attached to a spring that is stretched 0.2m from its original unstretched position. (Spring constant k=200 N/m)
*February 9, 2014*

**chemistry**

The molar mass of HCl is 36.5g use the fact that 1 amu = 1.6605x 10-24g power g to calculate Avogradro’s number.
*January 31, 2014*

**geometry**

solve for -4x=3y=3 7x-9y-6
*January 26, 2014*

**Physic II**

A proton is located at x = 1.0 nm, y=0.0nm. and an electron is located at x=0.0nm y=3.0nm. Find the attractive Coulombic force between them. (The value of k is 9.0 * 10^9 N*m^2/C^2) I found 2.3 x 10^-11 N am I correct?
*January 26, 2014*

**Fractions**

lisa's dog has 4 squeaky toys. two thirds of the dog's toys are squeaky toys. how many dog toys does lisa's dog have in all?
*January 24, 2014*

**MATH Fractions**

so if i have 4 sandwiches i have to add 1 whole of each sandwich? sorry 3rd grade is crazy and they don't explain it that well
*January 24, 2014*

**Business**

Will there ever be a single set of international rules governing multinational companies? Why? Why not? In what way are United States businesses demanding socially responsible behavior from their international suppliers? Why is this important to discuss? (graded)
*January 21, 2014*

**Business**

Will there ever be a single set of international rules governing multinational companies? Why? Why not? In what way are United States businesses demanding socially responsible behavior from their international suppliers? Why is this important to discuss? (graded)
*January 21, 2014*

**Business**

What do you presume had happened to get the U.S. corporations and workers to take their eyes off of their own economic interest? It seems the "carrot" of cheaper prices were dangled in front of them, but they didn't perceive the "sucker punch" of ...
*January 14, 2014*

**math**

you would use 1/3 cups of sugar and 1 1/4 cups of flour to half the recipe.
*January 13, 2014*

**math**

Fractions and mixed numbers are often used in everyday life. Discuss a real-life example in which you would need to add, subtract, multiply, or divide fractions or mixed numbers, and show the math
*January 13, 2014*

**Science**

Lines of latitude and longitude on a globe or map____________. a. estimate b. move c. intersect d. adjust
*January 12, 2014*

**math**

alaine has a ribbon that is 14 and one half feet long how long will each strip be if she cuts it into four equal parts
*December 16, 2013*

**science plz help right now!!!!**

u shuld nawt lisin 2 dem if u wont gud gr8d.
*December 16, 2013*

**math**

in a store all the oranges are stacked in triangular pyramids, each layer of oranges is in the shape of an equilateral triangle and the top layer is an single orange. How many oranges are are in a stack ten layers high
*December 8, 2013*

**Physics Classical Mechanics**

thnks, yeah i got it wrong too. i think that by top view means that its a disk and you are looking at it from the top. so you just have to do the torque torque= F*d=I*alpha so alpha = F*d/I d= distance between the point of aplication of the force and the point of rotation
*December 7, 2013*

**Physics Classical Mechanics**

mets, can you help me with the aceleration please???
*December 7, 2013*

**physics Classical Mechanics**

yes i got it wrong too
*December 7, 2013*

**physic**

a) t=d/v = 0.5588 seconds N=f*t = 650*0.5588= 363.235 b) i dont know it c) f'= f* (1-(speed observer/speed sound))
*December 6, 2013*

**Spanish 2 Questions**

1- te 2- te 3-, me 4- me 5- nos
*November 30, 2013*

**math**

You are the buyer for The Shoe Outlet. You are looking for a line of men’s shoes to retail for $79.95. If your objective is a 55% markup based on selling price, what is the most that you can pay for the shoes and still get the desired markup?
*November 26, 2013*

**Physics**

An X-ray binary consists of 2 stars with masses m1 (the accreting compact object) and m2 (the donor). The orbits are circular with radii r1 and r2 centered on the center of mass. (a) Find the orbital period T of the binary following the guidelines given in lectures. Express ...
*November 24, 2013*

**math**

Ned's Sheds purchases building materials from Timber town Lumber for $3,700 with terms of 4/15, n/30. The invoice is dated October 17. Ned's decides to send in a $2,000 partial payment. By what date must the partial payment be sent to take advantage of the cash ...
*November 19, 2013*

**math**

The Empire Carpet Company orders merchandise for $17,700, including $550 in shipping charges, From Mohawk Carpet Mills on May 4. Carpets valued at 1,390 will be returned because they are damaged. The terms of sale are 2/10, n30 ROG. The shipment arrives on May 26 and Empire ...
*November 19, 2013*

**Math**

A spider and a ﬂy are in a room that has length 8 m, width 4 m, and height 4 m. The spider is on one end wall 1 cm from the ﬂoor midway from the two side walls. The ﬂy is caught in the spider’s web on the other end wall 1 cm from the ceiling and also ...
*November 17, 2013*

**Math**

4. A spider and a ﬂy are in a room that has length 8 m, width 4 m, and height 4 m. The spider is on one end wall 1 cm from the ﬂoor midway from the two side walls. The ﬂy is caught in the spider’s web on the other end wall 1 cm from the ceiling and ...
*November 17, 2013*

**Physics question - Damon please help!!**

Thank you so much for taking the time to help me
*November 11, 2013*

**Physics question - Damon please help!!**

I am doing the monkey and hunter question, and I need to find out what the minimum speed the bullet has to be.. The variables I have are g, Vo, theta, Dx(horizontal distance from monkey), and Dy (vertical distance from monkey). I need to derive Vo in the form of (Dx/cos0)(sqrt...
*November 11, 2013*

**Algebra**

A plane has a speed of p km/h in still air. It makes around trip flying with and against the wind of w km/h.Show that its average speed is p^2-w^2/p km/h
*November 5, 2013*

**Algebra**

A plane has a speed of p km/h in still air. It makes around trip flying with and against the wind of w km/h.Show that its average speed is p^2-w^2/p km/h
*November 5, 2013*

**Math**

Jasmine has taken an online boating safety course and is now completing her end of course exam. As she answers each question.,the progrss bar at the bottom She has just completed question 16 and the test bar how she is 20% of questions. How many total questions of the teat?use...
*October 29, 2013*

**Finance**

If upon retirement in 20 years Simon plans to invest $400,000 in a fund that earns 5%, what is the maximum annual withdrawal he can make over the following 15 years
*October 25, 2013*

**(Dead Poets Society)**

Did Neil Perry make any accomplishments in the movie? Also what did Todd Anderson sacrifice to reach his goal of pleasing his teachers? Please help!
*October 24, 2013*

**Math- Algebra**

A motorist was to travel from town A to town B, a distance of 80 miles. He traveled the first 24 minutes at a certain rate; traffic then increased and for the next 6 minutes he averaged 10 miles per hour less than his original speed; then traffic eased up and he traveled the ...
*October 20, 2013*

**Physics**

You are walking around your neighborhood and you see a child on top of a roof of a building kick a soccer ball. The soccer ball is kicked at 41° from the edge of the building with an initial velocity of 21 m/s and lands 59 meters away from the wall. How tall is the ...
*October 10, 2013*

**statistics**

The typical amount of sleep per night for undergraduate college students has a bell shaped distribution with a mean of 7 and a standard deviation of 1.90 hours. Based on this distributional information we can conclude that at least 95 % of this population sleep ...
*September 27, 2013*

**Math**

There are two main classes of individuals who can affect the outcome of an experiment: Those who could influence the results Those who evaluate the results When all the individuals in either one of these classes are blinded, an experiment is said to be: A) Single blind (I'...
*August 29, 2013*

**Complements**

I think I have the complements right (see what's in brackets), but I need to say whether they're predicate adjective, predicate nominative, direct or indirect objects. At first this Saturday had been a warm, sunny [day]. However, the sky became [greyer] and [greyer] as...
*August 24, 2013*

**Mumford HS**

graph on calculator and estimate local maxima and local minima g(x)=1/2x^3-4x+3
*July 13, 2013*

**Math **

A soccer ball is kicked from the ground. After travelling a horizontal distance of 25m, it just passes over a 2m tall fence before hitting the ground at a horizontal distance of 35m. a) Determine an equation to represent the height of the ball relative to its horizontal ...
*July 10, 2013*

**College Algebra**

Suppose that the Quadratic equation had two X-intercepts. How could you use the intercepts to find the vertex?
*June 5, 2013*

**College Algebra**

When using the Quadratic formula, why is only necessary to examine the discrimant to determine if the equation only has real numbers?
*June 5, 2013*

**tech III math ( ACT Prep)**

A neon sign flashes every 4 seconds, another neon sign flashes every 6 seconds. If they flash together,how manyseconds later will they flash together again?
*June 3, 2013*

**Physics**

How much work does it take to stretch the spring from 10 cm to 20 cm from equilibrium?
*May 30, 2013*

**Chemistry**

calculate the volume of the 3.0 M stock solution needed to make a diluted 30mM solution in 400ml
*May 29, 2013*

**Chemistry**

calculate the volume of the 3.0 M stock solution needed to make a diluted 30mM solution in 400ml
*May 29, 2013*

**pre calc**

Find the exact value of sin(x-y) if sinx=-3/5 in Quadrant III and cosy=5/13 in Quadrant I.
*May 21, 2013*

**Calculus **

Using the four-step process find f(x)= 13 I know it is 0 and how to do the 4-step process, I just don't know how to do it without an exponent. Help please!
*May 15, 2013*

**Calculus **

An OPEN box has a square base and a volume of 108 cubic inches and is constructed from a tin sheet. Find the dimensions of the box, assuming a minimum amount of material is used in it's construction. HINT: the goal is to minimize the surface are of the OPEN box; this is ...
*May 14, 2013*

**economics**

65000
*May 2, 2013*

**roslyn**

Margo's soccer coach brought a large bag of watermelons to practice. The mass of the bag with all the watermelons in it was 12 kilograms. Explain how you could use estimation to figure out how many watermelons are in the bag.
*April 24, 2013*

**algebra**

Abby Tanenbaum paddled her canoe 10 miles upstream, adn then paddled back to her starting point. If the rate of the current was 3 mph,and the entire trip took 3.5 hours, what was Abby's rate (in still water)?
*April 23, 2013*

**math**

Say the price of a gallon of milk was raised from $3.00 to $3.50. What was the percent increase? Round to the nearest whole percent.
*April 8, 2013*

**chemistry**

what is the mass of sodium nitrate (85.00g/mol) that releases 2.55L of gas at STP?
*April 5, 2013*

**Math**

I think the answer is 3/4
*April 2, 2013*

**Chemistry**

Okay, I calculated that it should be Fe^2+ that precipitates out first and the concentration of CO3^2- is 9.55x10^-10. is that correct? in regards to question b: where is K2CO3 coming from? how am I using that in the calculation?
*April 1, 2013*

**Chemistry**

I am so overwhelmed. can somebody please help me? Consider a solution that is 0.022 M in Fe^2+ and 0.014 in Mg^2+ A) if K2CO3 is to selectively precipitate one of the cations while leaving the other cation in solution, which cation will precipitate first? B) What minimum ...
*April 1, 2013*

**math **

howard has 3 m of ribbon. how many centimeters is that
*March 30, 2013*

**math**

two third of a blueberry pie is left in the refrigerator. If the leftover pie is cut in 6 equal size, which fraction of the original pie is each slice
*March 20, 2013*

**Life orientation**

Ways in which the human or enviromental problem impacts have on the community
*March 18, 2013*

**math**

i actually need the anwser my self
*March 15, 2013*

**Algebra **

you trim a large square picture so that you could fit it into a frame. you trim 3 inches from the length and 2 inches from the width. the area of the resulting picture is 56sq in what was the perimeter of the original large square picture?
*March 12, 2013*

**Chemistry**

What is the mass of gas dissolved in a solution at 150kPa if 0.35g of the gas dissolves in 2.0L of water at 30kPa?
*March 3, 2013*

**math**

rectangular prism with a volume of 72 cubic inches; sum of the 3 lengths is 13; width is half of the height; the length is one more than the width what are the dimensions of the rectangular prism
*February 27, 2013*

**math fractions**

i don't know
*February 26, 2013*

**Finance**

After visiting several automobile dealerships, Richard selects the car he wants. He likes its $18,500 price, but financing through the dealer is no bargain. He has $3,700 cash for a down payment, so he needs an $14,800 loan. In shopping at several banks for an installment loan...
*February 15, 2013*

**Finance**

Joshua borrowed $2,300 for one year and paid $138 in interest. The bank charged him an $15 service charge. If Joshua paid the $2,300 in 12 equal monthly payments, what is the APR? (Round your answer to 1 decimal place
*February 15, 2013*

**Chemistry (Stoichiometry)**

Heres a balanced equation: Na2CO3(aq)+2AgNO3 (aq) --> 2NaNO3(aq)+Ag2CO3 (s) From this equation, 10 mL of AgNO3 in this contains 34 grams of AgNO3. Calculate the grams of solid product, Ag2CO3. Part 2: 10 mL of Na2CO3 in this experiment contains 21 grams of Na2CO3. ...
*February 6, 2013*

**Logarithms**

help- e^1-5x=3 find solution to 4 decimal places. I don't know how to type it in to my calculator!
*February 5, 2013*