Wednesday

November 26, 2014

November 26, 2014

Total # Posts: 2,479

**Physics **

A 85-Kg firefighter climbs up a ladder at a constant speed of 2.5 m/s. What average power does the firefighter expend to overcome gravity?
*November 25, 2014*

**math**

what are the steps in determining how to maximize the area of a rectangle given a specific perimeter?
*November 23, 2014*

**math**

what is 1/3 divide 5/8
*November 22, 2014*

**physics**

A solid disk rotates in the horizontal plane at an angular velocity of 0.040 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.13 kg·m2. From above, sand is dropped straight down onto this rotating disk, so ...
*November 16, 2014*

**Chemistry Buffers**

Write reactions showing how each of the following buffers would neutralize added HCl. HF and NaF Express your answer as a balanced chemical equation. Identify all of the phases in your answer. HC2H3O2 and KC2H3O2 Express your answer as a balanced chemical equation. Identify ...
*November 16, 2014*

**physics**

A ball with radius 12cm rolls on a level surface, and the translational speed of the center of mass is 0.35 m/s. What is the angular speed about the center of mass if the ball rolls without slipping?
*November 16, 2014*

**math fractions**

•math - Ms. Sue, Sunday, November 16, 2014 at 12:39pm 12 •math - bob, Sunday, November 16, 2014 at 12:56pm Ms. Sue can you tell me how you got that answer please. •math - Ms. Sue, Sunday, November 16, 2014 at 1:09pm Multiples of 6: 6, 12, 18, 24 Multiples of 4: ...
*November 16, 2014*

**math**

thanks mrs. sue. I understand now how I should get the lcm but how do I figure out how many pounds of meat will be in the meat loaf? when I multiply do I work the problem like this.... 3/4 *5/6 =9/12*10/12 =90/12 =7 6/12 =7 1/2 is this correct?
*November 16, 2014*

**math**

Ms. Sue can you tell me how you got that answer please.
*November 16, 2014*

**math**

Tom is making meatloaf with 3/4 pound of turkey and 5/6 pound of ground beef. What is the LCM he should use to find the total number of pounds of meat? How many pounds of meat will be in the meat loaf? Show your work Completely.
*November 16, 2014*

**physics**

A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. It collides with and sticks to a rod of mass M = 2 kg and length L = 0.9 m which pivots about a fixed vertical axis at the opposite end of the rod as shown. What fration ...
*November 14, 2014*

**algebra**

Andy hit three less field goals than three times the number of field goals Gary hit. Together, they scored 17 field goals. Write and Solve an equation to find how many field goals Gary and Andy scored.
*November 11, 2014*

**Chemistry**

What is the approximate ΔH in kJ for the following reaction as written: 2NH3(g) --> 3H2(g) + N2(g) Careful, what kind of bond does the nitrogen molecule make?
*November 10, 2014*

**Chemistry**

Arrange the following diatomic molecules in order of weakest to strongest bond: HF, HCl, HBr, and HI.
*November 10, 2014*

**Chemistry**

Which of the following ionic compounds has the highest melting point? Help: Lattice energy Select one: a. Cs2O b. K2O c. BeO d. SrO e. LiF f. CsI
*November 10, 2014*

**physics**

Sum of forces is F=mg-2.3N F=9.8*2.7N-2.3N F= 26.46-2.3 F=24.16 But F=ma 24.16N=2.7kg*a a= 8.96m/s^2
*November 8, 2014*

**chemistry**

How many atoms of oxygen are there in 5.00g of copper(II) sulfate pentahydrate?
*November 4, 2014*

**Engineering**

Have a new tutor who has failed to teach us most of his assignment, I've finally got stuck on derivation of the formula G=E/2(1+v). any help would be much appreciated!
*November 3, 2014*

**Chemistry**

If ununseptium (element 117) reacts with oxygen what would be equation of the product? Thanks so much!
*November 2, 2014*

**Math**

5/6=1/3-x
*November 1, 2014*

**engineering**

I've answered it myself i think. The liquid is being compressed therefore the change in volume should be negative. if someone could verify that'd be great
*November 1, 2014*

**engineering**

should my calculated bulk modulus of a liquid be (-)? the lookup tables i'm comparing the results too have positive values, or is it written without the (-) as a negative bulk modulus is impossible?
*November 1, 2014*

**English**

substitute the given words in and see if it makes sense the answer is when
*November 1, 2014*

**math**

Try setting up a proportion.
*October 27, 2014*

**math**

Why would you add 2+5?
*October 27, 2014*

**math**

Where did you get the 7 from? Check again. I'll be glad to check your work.
*October 27, 2014*

**algebra**

The slope of a horizontal line is 1. The equation of the horizontal line passing through (4, 5)is _______?
*October 24, 2014*

**algebra**

Find an equation of the line that satisfies the given conditions. Through (5, 3) and (4, 7)
*October 24, 2014*

**calc**

A water trough is 7 m long and has a cross-section in the shape of an isosceles trapezoid that is 40 cm wide at the bottom, 100 cm wide at the top, and has height 60 cm. If the trough is being filled with water at the rate of 0.3 m3/min how fast is the water level rising when ...
*October 23, 2014*

**stats**

The probability that a football game will go into overtime is 18%. In 140 randomly selected football games, what is the mean and the standard deviation of the number that went into overtime?
*October 21, 2014*

**Science**

xciojiovjeio
*October 21, 2014*

**Math**

Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 3 cubic feet per minute. If the pool has radius 6 feet and height 10 feet, what is the rate of change of the height of the water in the pool when the depth of the...
*October 21, 2014*

**College Pysics**

6
*October 19, 2014*

**Math**

A sphere has a volume of 200m3 . What is the volume of the smallest cube that this sphere would fit inside of? (Hint: try drawing a diagram of a side or top view of this situation)
*October 14, 2014*

**pre cal**

i;fo:OI jfiiejf ;soiej ;si edjis s;i ijd;si s;id dji s;ijaiwej faiw f ;wijf ;aeij fiaejd ;aie ; eiwfj ;awie eij;ije aweinrr r fkr rr;IEJR JREI rjir; rj W JIRJ R;RJ RF ZIRJ F; ZERJIFSE; TS GDR H SR TH RYHSRTHB DFV dfvszdf dv svsf vefv zf Figure out my code...-_- ...
*October 13, 2014*

**pre cal**

How fast is the tire traveling in mph if it does 2 rotations in 2 seconds with a diameter of 27 inches for the tire?
*October 13, 2014*

**statistics**

.4332
*October 12, 2014*

**statistics**

A congressional committie has of 8 senators and 7 representatives. How many ways can a subcomittie of 6 be formed from the full committee if exactly 5 of the members must be senators?
*October 10, 2014*

**Math**

A cylinder has a surface area of 250cm2 . The height is twice as big as the radius. What is the height of the cylinder?
*October 3, 2014*

**algebra**

5 (x + 10) + x ?? 6x + 15 5x + 15 6x + 50 4x - 50
*October 1, 2014*

**chemistry**

A solution contains an unknown amount of dissolved magnesium. Addition of 5.34×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in the solution.
*September 30, 2014*

**biology**

there just fill in a blank questions
*September 30, 2014*

**biology**

_______ is the tendency for the fluids to resist flow.______________ water is more vicious than warmer water, allowing floating organisms to use less energy to keep from sinking.
*September 30, 2014*

**history**

They all how a part in reform. I would have to change to Plessy v. Ferguson because of it was just between the races and not everyone
*September 27, 2014*

**history**

Muckrackers
*September 27, 2014*

**history**

There were many examples that inspired the reform-minded spirit after 1900. Which was not an example? Muckrakers Plessy v. Ferguson Triangle Shirtwaist Factory fire The Jungle
*September 27, 2014*

**Trigonometry**

The wheels of a scooter have a diameter of 4.5 inches. If the person riding the scooter is traveling down hill at 15.0 mph. what is the approximate angular speed of the wheels in radians per second
*September 25, 2014*

**chemistry**

A mothball, composed of naphthalene (C10H8), has a mass of 1.10g
*September 24, 2014*

**chemistry**

A helium balloon contains 0.30g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?
*September 24, 2014*

**Physics**

A projectile of mass 0.377 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.1 m/s. The projectile rises to a maximum height of y above the end of the cannon’s barrel and strikes the ...
*September 23, 2014*

**Physics**

An ice skater skates 13.3 m southwest, then 26.6 m east, and finally 39.9 m in a direction 51.5◦ north of east. Find the magnitude of the displacement required to bring the skater back to her starting point. Answer in units of m
*September 22, 2014*

**physics**

A child rides a toboggan down a hill that descends at an angle of 20.7◦ to the horizontal. The hill is 18.2 m long. What is the horizontal component of the child’s displacement?
*September 21, 2014*

**math**

thank you so much i get it now !! :)
*September 13, 2014*

**math**

simplify and state any restrictions: 1. x+3/x^2+11x+24 - 2x+10/x^2+11x+30 answer: -x-10/(x+8)(x+6) 2. x-4/x^2-8x+16 + 3x+21/x^2+12x+35 answer: 4x-7/(x-4)(x+5) i dont uderstand how to do it. can you please show me the steps. thanks
*September 13, 2014*

**math**

-10+8=8+(-10) name the property illustrated
*September 12, 2014*

**algebra**

mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
*September 10, 2014*

**Math**

mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
*September 9, 2014*

**government**

Judges espousing a philosophy of original understanding maintain that school desegregation cases decided on the basis of the Fourteenth Amendment were wrongly decided because? 1 he original intent of the framers was to defer to the will of legislative bodies. 2 we do not know ...
*September 5, 2014*

**government**

laws that discriminate must be said to reflect the will of the majority.
*September 5, 2014*

**government**

Originalists often hold that it is incorrect to use the Equal Protection Clause of the Fourteenth Amendment to strike down laws that discriminate because
*September 5, 2014*

**Math**

A recipe that makes 4 servings calls for 3 / 4 cup of apple juice and 2 / 3 cup of cranberry juice. How many cups of juice are there per serving?
*September 4, 2014*

**Math**

Perfect, well done!
*August 31, 2014*

**statstics**

a report says 65% of vechiles sold were SUV's. A random sample of 100 vechiles sold in last month is taken. Use the central limit theorem, find the probability that most 70% of the vechiles in the sample were SUV's
*August 25, 2014*

**algebra**

what is the equation of a parabola whose vertex is (6,0) and whose graph is half as tall as y=x^2 and opens upside down
*August 23, 2014*

**statistics**

You want to estimate the difference in grade point averages between two groups of university students to be accurate within 0.2 grade point, with probability approximately equal to 0.95. If the standard deviation of the grade point measurements is approximately equal to 0.6, ...
*August 13, 2014*

**College English**

disunity or lack of confederation amongst various tribes caused considerable weakness in their profile as "THE" indian nation as WHOLE... thus they were dismembered and placed on reservations.. by 1825 the last major tribes were sent across the MISSISSIPPI RIVER.. ...
*July 28, 2014*

**statistics**

the daily milk production for a certain type of dairy cow has a mean of 43 pounds per day with a standard diviation of 5 pounds per day. Suppose this daily mild production has a normal distribution. Calculate the probability that a randomly selected cow of this type has a ...
*July 17, 2014*

**Calculus**

Thank you so just to clarify for a) all you did was take the integral of the acceleration to get your v(t) function. Then for b) do you set v=2+3t equal to 14? c)You just take the integral of v(t) to get position function I think.
*July 6, 2014*

**Calculus**

A particle moves with a fixed acceleration of 3 m/s^2. If its initial velocity is v(0)= 2 m/s, and its initial displacement is s(0)= 0 A)Find its velocity function v(t) B)How long does it take for the particle to reach the velocity 14 m/s? C)Find the distance traveled when its...
*July 6, 2014*

**math**

convert y=2x^2+5x-5 into vertex form
*July 4, 2014*

**AP Macroeconomics**

nobody likes you :(
*July 3, 2014*

**Calculus**

Given f(x) = csc^4(5x^2-3x+1), find f'(x). Show all work.
*June 23, 2014*

**English**

I need to find a sensationalised news article homework a and then highlight sensational parts please help'!!!
*June 21, 2014*

**math**

Perform a one-way ANOVA analysis, testing at the 0.05 level. Also, calculate the mean number of sick days for each group. Describe your results. . Group Sick days per year Placebo: 7, 4, 6, 8, 6, 6, 2, 9 Flu Shot 1: 5, 3, 3, 5, 4, 7, 3, 3 Flu Shot 2: 2, 4, 1, 2, 2, 1, 2, 5
*June 21, 2014*

**Statistics**

I began to think of the binomial distribution with the common heads or tails coin flipping experiment example...I believe my question in #3 is related to that, and in fact I think the generalization is what applies, the "multinomial" distribution...any thoughts from ...
*June 12, 2014*

**Statistics**

You have these 10 observations of some event X: 1.03 1.022 1.022 1.01 1.026 1.02 0.95 1.005 1.05 1.023 Here is the sorted list from least to greatest: 0.95 1.005 1.01 1.02 1.022 1.022 1.023 1.026 1.03 1.05 Based on this data alone: 1) It makes sense to say P(X <= 0.95) = 1/...
*June 12, 2014*

**Pre algebra**

Sophie has 5 pieces of string that are 4 yards each. She uses 3 pieces that are each 3 feet long. How much string does Sophie have left?
*June 8, 2014*

**Physics**

. A rock is thrown up into the air with an initial velocity of 15m/s up. What is the rock's velocity after 0.40 seconds?
*June 8, 2014*

**Chemistry**

a) Which of the following reagents would oxidize Zn to Zn2 , but not Ag to Ag ? Answers are: Co2+ Ca2+ Br2- Br2 Co or Ca b) Which of the following reagents would oxidize Ag to Ag , but not Cl– to Cl2? Answers are: Co Br- Br2 Co2+ Ca2+ or Ca
*June 2, 2014*

**Geometry**

Need help solving this problem so confused The tries of an automobile have a diameter of 22 inches. If the wheels revolve ten times, how far does the automobile move? Round your answer to the nearest tenth of a foot and show your work
*May 29, 2014*

**Chemistry**

The mechanism for the reaction described by No2+CO--->CO2+NO is suggested to be (1)2NO2--->NO3+NO (2)NO3+CO--->NO2+CO2 Assuming that [NO3] is governed by steady-state conditions, derive the rate law for the production of CO2(g) and enter it in the space below. rate of...
*May 23, 2014*

**algebra**

i'm thinking of two numbers, x and y. The sum of 4x and 1 is y. The sum of y and twice x is 13. Find x and y.
*May 21, 2014*

**physics**

A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm diameter hose delivering 450 L/min through a 0.80cm diameter nozzle?
*May 20, 2014*

**algebra**

I have 8 cups of a juice drink consisdting of 25% oj and 75% apple juice. I want to make a mix with 40% oj. how many cups of oj must I add?
*May 19, 2014*

**Physics**

A yo-yo is spun from rest by pulling on the string with a constant tension of 2.0 N. The radius of the inner rod on which the string is strung round is 0.50 cm. The tension is applied for 5.0 seconds after which the yo-yo is observed to spin with an angular velocity of 15 rad/...
*May 18, 2014*

**MAT 201**

The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than 10 days? More than 21 days?
*May 15, 2014*

**statistics**

The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than 10 days? More than 21 days?
*May 15, 2014*

**Geometry**

How to foil 2xsquared - x - 15=0
*May 14, 2014*

**pre cal **

For a normal curve, what percentage of values falls beyond two standard deviations from the mean?
*May 12, 2014*

**Maths**

Find the exact value of cos^2(15°)-cos^2(30°)+cos^2(45°)-cos^2(60°)+cos^2(75°)
*May 9, 2014*

**Chemistry**

Nevermind I figured it out its: 2SO3^2- + 2H2O + 2e^- ---> S2O4^2- + 4OH^-
*May 4, 2014*

**Chemistry**

Is it: H2O + SO3^2- ---> SO4^2- +2H^+ + 3e^-
*May 4, 2014*

**Chemistry**

Balance the following equation for a half reaction that occurs in basic solution. Use e– as the symbol for an electron. SO3^2- ---> S2O4^2-
*May 4, 2014*

**Chemistry**

Thanks a lot i figured this one out too its: 2H2O + MnO2 + 3Cu^2+ ----> MnO4^- + 3Cu^+ + 4H^+
*May 4, 2014*

**Chemistry**

This is how I am doing it: 1. break up into half reactions MnO2--->MnO4 and Cu^2+ ---> Cu^+ 2. add H20, H+, and e- to both sides and I get: 2H2O + MnO2 ---> MnO4 + 4H + 8e^- and e^- + Cu^2+ ----> Cu^+ then adding them I get: 2H2O + MnO2 + Cu^2+ ---> MnO4 + Cu...
*May 4, 2014*

**Chemistry**

In a particular redox reaction, MnO2 is oxidized to MnO4– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional. MnO2 + Cu^2+ ---> MnO4^- + Cu^+
*May 4, 2014*

**English Literature**

THANK YOU SO MUCH
*May 1, 2014*

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