Tuesday

May 24, 2016
Total # Posts: 425

**Chemistry**

What is the oxidation number for each atom in NH4F? N=+3, H=-4, F=+1 N=-3, H=+1, F=-1*** N=+3, H+1, F=-1 N=-3, H=-1, F=+1
*May 19, 2016*

**Chemistry**

so it's K?
*May 19, 2016*

**Chemistry**

What is the reducing agent in the following reaction? 2K + S - - > K2S K S*** K2S None of the above
*May 19, 2016*

**Chemistry**

In the reaction of beryllium with fluorine, which atom is oxidized? fluorine beryllium*** neither of them both of them
*May 19, 2016*

**Chemistry**

Then would it be electrons?
*May 19, 2016*

**Chemistry**

What are transferred in an oxidation-reduction reaction? atoms*** electrons ions protons
*May 19, 2016*

**Chemistry**

Iron metal is formed during the reduction of iron(III) oxide: Fe2O3 + 3CO 2Fe + 3CO2 When 29.7 kg of Fe2O3 react with 17.8 kg of CO and 4.5 kg of Fe are recovered, what is the percent yield for the reaction?
*April 25, 2016*

**Math**

I need help please. Draw a quadrilateral that is not a parallelogram.
*April 19, 2016*

**math**

$6350 is compounded semiannually at 14% for 12 years. What is the total amount in the compound interest account?
*April 19, 2016*

**chem**

Calculate ΔG° (in kJ/mol) for the following reaction at 1 atm and 25 °C: C2H6 (g) + O2 (g) → CO2 (g) + H2O (l) (unbalanced) ΔGf° C2H6 (g) = –32.89 kJ/mol; ΔGf° CO2 (g) = –394.4 kJ/mol; ΔGf° H2O (l) = –237.13 kJ/mol
*April 10, 2016*

**Probability and statistics**

Assume that a procedure yields a binomial distribution with a trial repeated n times. Use the binomial probability formula to find the probability of x successes given the probability p of success on a single trial.n=22, x=18, p=0.85, q=.15
*March 22, 2016*

**math**

300
*March 22, 2016*

**physics**

adding to what I just posted, so the Fnet is = Force of the rolling car (mgsin(15))-Force of friction. So Fnet=5580N-5000N=580N And Fnet=ma So acceleration=Fnet/mass 580N/2200kg= 0.264m/s^2
*February 29, 2016*

**physics**

the sin of the angle is 15 degrees. I just had the exact same homework problem and got the correct value for acceleration by doing what he said above.
*February 29, 2016*

**Physics**

The answer is 1.5A (B)
*February 24, 2016*

**Math**

2178/23 / 11
*February 22, 2016*

**Math**

Find the linear speed of a point that moves with constant speed in a circular motion if the point travels along the circle an arc length = 2178/23 kilometers in time t=11 seconds?
*February 22, 2016*

**Art**

ya is it c
*February 16, 2016*

**Art**

1. Which of the following answer choices contains a metaphor? A. His skin was sandpaper** B. The sun sparkled like a diamond C. She wanted to be like the birds and fly away D. They felt free when they ran across the doors 2. What is a key characteristic of a refrain in poetry...
*February 16, 2016*

**Math**

1. Which property is NOT a characteristic of a parallelogram? A. Opposite sides are not congruent B. All angles are congruent** C. Opposite sides are parallel D. Opposite angles are congruent
*February 11, 2016*

**physics**

A horizontal spring with k = 110 N/m has one end attached to the wall. A 290 g block is pushed onto the free end, compressing the spring by 0.160 m . The block is then released, and the spring launches it outward. Neglecting friction, what's its speed when it leaves the ...
*February 9, 2016*

**Algebra 2**

Did I solve these right? 1. f(x)= -3x + 1 g(x)= -4x^2 + x + 2 Find g(f(x) ) -4(-3x+1)^2+(-3x+1)+2 -4(-3x+1)^2-3x+1+2 3-3x-4(-3x+1)^2 3-3x-4+24x-36x^2 =21x-36^2-1 2.f(x)= -2x + 1 g(x)= -3x^2 -x -1 Find (g /f)(x) -3x^2-x-1/-2x+1 3. f(x)=-x +2 g(x)= -4x2 + x + 5 Find (f o g)(x) f...
*November 10, 2015*

**pychology**

According to research led by Sarina Saturn, which of the following is predicted by variations of a particular gene on the third chromosome, which influences oxytocin functioning?
*October 6, 2015*

**Math 7th grade **

-0.5167 is this number rational or irrational ? Thank you
*September 9, 2015*

**Algebra**

Using two variables - A carpenter wants to cut a 24-foot board into two pieces so that one piece is 5 times as long as the other. How long should each piece be?
*April 20, 2015*

**physics**

A ball is thrown vertically upward from the edge of a cliff of height 131 m. The initial velocity is 77.7 m/s. how high is the cliff?
*April 14, 2015*

**Pre-calculus help**

I have two problems I am stuck on, if you could show me how to solve the problems it would be much appreciated. 1) Find sin 2x, cos 2x, and tan 2x from the given information. tan x = − 1/6, cos x > 0 sin 2x = cos 2x = tan 2x = 2) Find sin 2x, cos 2x, and tan 2x from ...
*April 10, 2015*

**Delete Question**

Hi! Is it possible to delete a question I asked since I got it answered? Thanks! Subject: Math Date: Monday, March 23, 2015 Time: 8:27
*March 24, 2015*

**Math **

Directions: Use the following matrix to perform the elementary row operations sequentially. A=[3 2 |8] [5 2 |12] 1.) (1/3) R1 From the original matrix 2.) -5R1+R R2 From matrix in question 1.
*March 23, 2015*

**Chemistry**

What is the molarity of an HNO3 solution if 24.1mL of a 0.250M Ba(OH)2 solution is needed to titrate a 15.0mL sample of the acid? Can you tell me the process to finding this answer?
*March 18, 2015*

**Science**

A sled and rider with a combined weight of 59 kg are at rest on the top of a hill 24 m high. (a) What is their total energy at the top of the hill? (b) Assuming there is no friction, what would the total energy be on sliding halfway down the hill?
*February 25, 2015*

**algebra**

A gym has an enrollment fee of $80 and a $25 fee per month of membership. Write an expression to represent the total cost of m months of membership?
*February 3, 2015*

**Derivatives**

Find derivative of y= x^3(5x-1)^4 I got y'= 2x(5x-1)^3 +16x^2+5x-1 is this right? If not what and where did I go wrong
*November 11, 2014*

**Organic chem Extraction of caffeine from tea**

A. Interface B. Volatile compounds, like ether
*September 16, 2014*

**Math**

Outside temperature over a day can be modelled as a sinusoidal function. Suppose you know the high temperature for the day is 87 degrees and the low temperature of 63 degrees occurs at 5 AM. Assuming t is the number of hours since midnight, find an equation for the temperature...
*September 2, 2014*

**Drama**

Postmodern theatre, like other postmodern art forms, discards many of the ideas of modernism. Theories of modern theatre propose that access to universal truths can be achieved through artistic representation of life. Postmodern theatre, however, rejects the notion of make-...
*August 27, 2014*

**Drama**

How is 4.48 Psychosis by playwright Sarah Kane a postmodern drama?
*August 27, 2014*

**algebra**

Find the present value, using the present value formula and a calculator. (Round your answer to the nearest cent.) Achieve $225,500 at 8.55% compounded continuously for 8 years, 125 days.
*August 22, 2014*

**Alegbra**

Find the present value, using the present value formula and a calculator. (Round your answer to the nearest cent.) Achieve $225,500 at 8.55% compounded continuously for 8 years, 125 days.
*August 10, 2014*

**Alegbra**

Assume the car can be purchased for 0% down for 60 months (in lieu of rebate). A car with a sticker price of $42,900 with factory and dealer rebates of $5,100 (a) Find the monthly payment if financed for 60 months at 0% APR. (Round your answer to the nearest cent.) $ (b) Find ...
*August 10, 2014*

**math**

13% = 104 beads 1% = 104 divided by 13=N beads 12% = 12 x n = e So, Lucy has 96 blue beads (n = 8)
*May 1, 2014*

**Public Speaking**

Evaluating audience feedback to your speech presentation usually happens: A. before the speech. B. after the speech. C. during the speech. D. in the speech preparation
*April 14, 2014*

**Physics**

Can someone help with the following physics problem? This is the only one I'm having trouble solving. Thanks. A 3.6-m-long ladder leans against a frictionless wall as shown in the figure below. The coefficient of static friction between the ladder and the floor is 0.30. ...
*April 13, 2014*

**Math**

Oh! Ok thank you!
*April 7, 2014*

**Math**

What is the multiplicative inverse of 6 1/7? My answer- 16
*April 7, 2014*

**Math**

Thanks
*April 6, 2014*

**Math**

The volume of the cylinder is 15 cubic inches. If all the dimensions are multiplied by 2.7 what is the new volume? My Answer- 295.245
*April 6, 2014*

**Math**

Please help!
*April 6, 2014*

**Math **

A triangular prism has a volume of 92 in.³ if all dimensions are multiplied by 1.6 what is the new volume?
*April 6, 2014*

**Common Core State Exam**

Thank you so much as well Ms. Sue! I knew you would cometo save the day. That is what you always do :)
*April 1, 2014*

**Common Core State Exam**

Thank you sooooooooooooo much for your help Writeacher!!!!!!!!! ;):):)
*April 1, 2014*

**Common Core State Exam**

I need some tips on dong the best I could do on the common core state exam. Please do the best you can to give tips. And if you know a website that will help me study, please do give it to me. Thank you for all you support and help :)
*April 1, 2014*

**accounting**

Liz Marett is the chief financial officer for Fulton Restaurants. She delivered the following comments in a recent conference call with analysts that follow the company: "20X5 was another excellent year. Net income was a record setting $10,000,000. Food Revenue reflected ...
*March 25, 2014*

**Human relations**

A female doctor attempting to explain to her 27-year-old male patient that his severe acne can be cured with a specific drug, but the side effect of the drug might be that he will be temporarily bald.
*March 19, 2014*

**Language Arts**

Can someone tell me what the simple subject and simple predicates are in this sentence? Thanks Sports fans trade baseball, football, or basketball cards. a. sport fans/trade b. fans/or c. baseball/or d. fans/trade
*March 12, 2014*

**drawing**

FOUR :)
*February 28, 2014*

**math**

is that the whole question or are you missing somthing
*January 30, 2014*

**pre cal**

f(x)=2x^2+12x-6 what is the min or max value ?
*January 30, 2014*

**math**

five
*January 30, 2014*

**Math Pre-Cal**

i really need the help i am so lost
*January 30, 2014*

**Math Pre-Cal**

how would i do that
*January 30, 2014*

**Math Pre-Cal**

The answer I got was 24, and it was wrong
*January 30, 2014*

**Math Pre-Cal**

It ask for the Min or Max value?
*January 30, 2014*

**Math Pre-Cal**

what is the value of f(x)=2x^2-12x-6
*January 30, 2014*

**Math Pre-Cal**

Ok I understand now on that so far. How do you find the value of a quadratic function?
*January 30, 2014*

**Math Pre-Cal**

When I am giving the point vertex of (1,-1) and another point of (2,2) and i need to put the answere in the form f(x)=ax^2+bx+c hwo would I go about doing that?
*January 30, 2014*

**Physics**

Friction is usually the killer of efficiency. How does a ramp relate to friction?
*January 19, 2014*

**Physics**

What is one advantage and one disadvantage of using a ramp? Explain in detail.
*January 19, 2014*

**Physics**

What affect does changing the mass of an object on a ramp have on the efficiency of the ramp? Explain.
*January 19, 2014*

**Physics**

Bryan tosses a 75.0 g rock into the lake. The rock leaves hus hand at a height of 175 cm above the ground travelling at 19.0 m/s. How high above the ground will the rock travel if it is accidentally thrown straight up? How high above the water will it travel if it is thrown in...
*January 16, 2014*

**Physics**

Bryan tosses a 75.0 g rock into the lake. the rock leaves hus hand at a height of 175 cm above the ground travelling at 19.0 m/s. How high above the ground will the rock travel if it us accidentally bryan tosses a 75.0 g rock into the lake. The rock leaves hus hand at a height...
*January 16, 2014*

**Physics**

Three objects with masses m1= 36.5 kg m2= 19.2 kg m3= 12.5 kg Are hanging from massless ropes that run over a frictionless pulleys. If the system is released from rest, what is the magnitude of the acceleration in m/s^2 of mass m1? ___________________ O O O I I I I I I I I I I...
*January 16, 2014*

**Physics**

Three objects with masses m1= 36.5 kg m2= 19.2 kg m3= 12.5 kg Are hanging from massless ropes that run over a frictionless pulleys. If the system is released from rest, what is the magnitude of the acceleration in m/s^2 of mass m1? ___________________ O O O I I I I I I I I I I...
*January 16, 2014*

**Physics**

An elevator motor provides 45.0 kW of power while lifting a 2000 kg elevator 35 m. If the elevator contains six passengers of the same mass and it takes 20.0 s to accomplish this task, determine the mass of each passenger. Assume the system is 83 % efficient.
*January 16, 2014*

**Physics**

A microwave rated at 1000 W heats a 500 g glass of water from 10 degrees C to 55 degrees C in 2 minutes. Determine the efficiency of the energy transformation.
*January 16, 2014*

**Physics**

A farmer drives a 0.100 kg iron spike with a 2.00 kg sledge hammer. The sledge hammer moves at a constant speed of 3.99 m/s until it comes to rest on the spike after each swing. Assuming all the energy is absorbed by the nail, and ignoring the work done by the nail on the ...
*January 16, 2014*

**Physics**

A 599 g piece of silver at 150 degrees C is submerged in 1000 g of water at 5 degrees C to be cooled. Determine the final temperature of he silver and water given Heat capacity of water= 4.18 x 10^3 j/kg degrees C Heat capacity of silver= 2.49 x 10^2 j/kg degrees C
*January 16, 2014*

**Physics**

A mechanic uses a chain and block to lift a 875-kg engine 4.00 m to the top of the garage. The downward force in the chain over the 4.00 m distance is 5.00 x 10^4 N. How much useful work was done? Thannnkkks :)
*January 16, 2014*

**Physics**

A mechanic uses a chain and block to lift a 875-kg engine 4.00 m to the top of the garage. The downward force in the chain over the 4.00 m distance is 5.00 x 10^4 N. A) Calculate the work done in raising the motor B) How much useful work was done? C) What is the efficiency of ...
*January 16, 2014*

**physics**

weight 240N/ area 2cm2=
*January 6, 2014*

**Chem 101**

In a fission reaction, uranium-235 bombarded with a neutron produces strontium-94, another small nucleus, and 3 neutrons. Write the nuclear equation for this reaction.
*December 6, 2013*

**math**

which expression is equivalent to 4*4*4*4*4*4*4*4? Debra has 2/3 of a pound of loose green tea leaves. If she wants to keep one-half of the tea at home and the other half at work, what fraction of a pound will she have at work? 7-5/7= what is (-7) to the fifth power in ...
*November 26, 2013*

**math**

What is 31x 19 in expanded algorithm?
*November 7, 2013*

**English... Urgent**

Uhmmm, hmm. I'm rather positive this is a website to assist you in your area of need,NOT TO DO THE WORK FOR YOU AND IN RETURN YOU RECEIVE THE REWARD. IF BY CHANCE YOU HAPPEN TO BE ILL-INFORMED IN THE AREA OF PLAGIARISM, YOU MAY SURELY WISH TO FANCY YOURSELF WITH ITS ...
*October 26, 2013*

**HSM/220**

First budget resource amount was $1,600,000.00 and this budget is to be increased by 50%. So, my allocation for that increased amount becomes $2,400,000.00. I have done the following in order to get my increase total: 1,600,000*0.50= $800,000 so 1,600,000+800,000= $2,400,000....
*October 25, 2013*

**HSM/220**

PLEASE HELP!!!!!!...FOR LACK OF CERTAIN VARIABLE TYPE MATH SKILLS AND A NEED IN ASKING THIS: IS IT IN FACT THAT 1.5 IS THE SAME AS MULTIPLYING BY 0.50 IN FINDING THE ANSWER? IF MY ASSUMPTION RING TRUE, THEN I HAVE NO FEASIBLE REASON FOR CONSISTENTLY COMING UP WITH THE WRONG ...
*October 25, 2013*

**HSM/220**

How do I increase a fixed sum by 50% properly?
*October 25, 2013*

**Science**

This is because the igneous rock could become a metaphoric rock before a sedimentary rock. An igneous rock is formed from lava and magma while the sedimentary rock is formed slowly over time by minerals layering gradually.
*October 23, 2013*

**Calculus Homework**

Use linear approximation to estimate the amount of paint in cubic centimeters needed to apply a coat of paint 0.01cm thick to a hemispherical dome with a radius of 18 meters.
*October 15, 2013*

**physics**

A piece of wood with mass m = 2.8 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 440 N on the wood. If the coefficient of static friction between the wood surfaces is 0.66, what ...
*October 3, 2013*

**Calculus, check my answers, please!**

f(-1)=5 and f(-2)=-5 so 5--5 = 5+5= 10 that is how it is even
*October 2, 2013*

**HSM 220**

I need help understanding the categorization of line-item budgets, program budgets, and functional budgets matrix for an organization? Can somebody help me understand where salaries go etc.??
*September 27, 2013*

**Human Resources Administration**

I need help understanding whether salaries are put into all categories of a program budget,line-item budget,and a functional budget matrix?
*September 27, 2013*

**vocabulary**

The answer is C
*September 27, 2013*

**A Curious Question**

I am grateful for those who righteously point out others misguided pipe dreams. The way of the world now a days, you can be a very well educated in what you had believed to be "the obvious career chosen path,(i.e. doctor, dentist)but nothing is guaranteed in life so try ...
*September 26, 2013*

**A Curious Question**

First in your second sentence you have incorporated the wrong "two" into your sentence. The correct word is "TOO". Graduating early has many advantages if you are planning on immediately going on to a college education. If this is the case, you have ...
*September 26, 2013*

**physics**

I would just use x = (vi)t + 1/2 (a)(t^2) and remember that vi is -1.
*September 23, 2013*

**Math with applications**

Find the vertex of 1. F(x)=3(x-c)^2+1
*September 23, 2013*

**Trigonometry**

Find all solutions of 4(cos(x))**2-4 sin(x)-5=0 in the interval (6pi, 8pi) I tried to work it out and got: 4(cos**2x)-4cosx -9 = 0, but I can't figure out what cosx = from there to finish the problem.
*July 31, 2013*

**Trigonometry**

Find all solutions of 4 (cos (x)**2)-1=0 in the interval (6pi, 8pi). (Leave your answers in exact form and enter them as a comma-separated list.)
*July 31, 2013*