Monday

November 30, 2015
Total # Posts: 2,311

**Physics**

What is the difference between Electro-Motive-Force and Potential-Difference?
*November 27, 2015*

**physics**

water and glass with refractive index of 1.5 are interfaced.if the incident ray are from the water makes an angle 60 degrees with the normal.find the direction of the reflected and refracted rays(given that refractive index of glass to water=1.33)
*November 25, 2015*

**Physics**

A watch battery can supply approximately 15 C of charge before it needs to be replaced. Calculate the number of hours it will last if the current drawn by the watch is 0.50 micro-amps
*November 24, 2015*

**Physics**

An electrical motor has a power rating of 500 W when it is lifting a mass of 80 kg through a height of 6 m in a time of 15 s. Calculate the efficiency of the motor?
*November 24, 2015*

**math**

if I walk 2.5 miles in 1.25 hours, how long does it take to walk .5 miles?
*November 23, 2015*

**writing**

ok is that all you found wrong and thanks.
*November 18, 2015*

**writing**

n this discussion, you will post issues related to motivation and learning. Refer to the texts in this section, other texts you have read, and your personal experience and knowledge to support your ideas. Begin your discussion by addressing the following questions: What are ...
*November 18, 2015*

**writing**

MS.Sue Are you there. I need this done ASAP!!! please and thanks
*November 17, 2015*

**writing**

her's what i got for you cna you check it please Somethings that motivate people is money and something that they want like a guitar or something that as will motivate is the envy to be like other and when that will make them motivated. When someone makes and action that ...
*November 17, 2015*

**writing**

Yes im sorry if i write it will you proof and edit it
*November 17, 2015*

**writing**

In this discussion, you will post issues related to motivation and learning. Refer to the texts in this section, other texts you have read, and your personal experience and knowledge to support your ideas. Begin your discussion by addressing the following questions: What are ...
*November 17, 2015*

**physics**

A boy and girl are balanced on a "massless" seesaw. The boy has a mass of 75 kg and the girl a mass of 50kg. The seesaw is 6 meters in lenght with the pivot point between them...What are the distances each child must sit relative to the pivot point?
*November 14, 2015*

**PHYSICSSS**

The average velocity a golf ball hit with an iron is about 66.7 m/s. Calculate the maximum height and displacement of the golf ball if it is hit with a 45 degree 9 iron
*November 8, 2015*

**fractions**

thanks
*November 6, 2015*

**fractions**

But isn't it asking for the percent? Like the percent of 1/2 is 2/3? So 1/2 * 133% = 2/3?
*November 6, 2015*

**fractions**

what percent of 1/2 is 2/3 as mixed number
*November 6, 2015*

**math**

that isn't the point here..
*November 6, 2015*

**math**

.25 cents?
*November 6, 2015*

**Biology (or math)**

What is the surface area to volume ratio of a cube with a with of 4 cm. I think its 1.5:1
*November 5, 2015*

**Math**

A section of a boardwalk is made using 15 boards. Each board is 914 inches wide. The total width of the section is 144 inches. The spacing between each board is equal. What is the width of the spacing between each board? Write your answer in simplest form.
*November 4, 2015*

**Computer programming**

(Simplified Water Bill Computation) The bill for a water service subscriber is prepared as follows: 1. The name of the water consumer is entered 2. The previous water meter reading in cubic meters (reading last month) from the consumer’s meter is entered. 3. The present ...
*October 30, 2015*

**science**

in western united states: How many states border by ocean?
*October 28, 2015*

**Math**

a manufacturer has daily production costs of C=4000-30x+0.5x where C is the total cost in dollars and x is the number of units produced. (a) How many units should be produced each day to yield a minimum cost? (b) What is the minimum cost?
*October 21, 2015*

**Math**

5 basketball teams play each other once. How many games are played?
*October 15, 2015*

**ENN103F**

Require memorandums for 2013 and 2014 exam question papers
*October 15, 2015*

**ENN103F**

Comprehension India elections : domination of Nehru-Gandhi dynasty under threat Possible questions and answers on the passage
*October 15, 2015*

**Logarithm help please**

The intensity, I, of light passing through water can be modelled by the equation I=10^1-0.13, where x is the depth of water in metres. Most aquatic plants require a light intensity of 4.2 units for strong growth. Determine the depth of water at which most aquatic plants ...
*October 14, 2015*

**Physics**

A car decelerates uniformly and comes to a stop after 9 seconds. The car's average velocity during deceleration was 45 km/h. What was the cars deceleration while slowing down?
*October 10, 2015*

**Language Arts (- Ribbons -)**

Note, this question is from the book "Ribbons", if you haven't read it then you are not able to help with this. In "Ribbons", Stacy's grandmother stiffens and scolds her when Stacy tries to hug her. What does this show about the cultural differences...
*October 5, 2015*

**sinking**

Find the periodic payments PMT necessary to accumulate the amount given in a sinking fund. HINT [See Example 2.] (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)
*October 4, 2015*

**Social Studies**

anyone im clueless???
*September 30, 2015*

**English**

I was planning to put job and health under main point of Benefits
*September 27, 2015*

**English**

Benefits such as job and health in terms of brain such as improvement
*September 27, 2015*

**English**

Learning foreign languages.
*September 27, 2015*

**English**

I am doing an essay on why language is important in today's society. I have 2 main points so far: 1) it benefits an individual greatly 2) See things in a different perspective 3)?? I don't know what else, I am stuck on this for 2 hours. Please any advice?
*September 27, 2015*

**Maths**

66 feet.
*September 24, 2015*

**social studies**

griots
*September 22, 2015*

**Statistics**

b. What is the probability of randomly generating a 7 from the numbers 2 to 12 inclusive?
*September 20, 2015*

**Logarithm help **

using logarithms to solve exponential equations. 5^1+x = 2^1-x I need exact numbers. I did one on my own already. 5^x-1 = 9 5^x-1 = 9 log(5^x-1) = log9 (log5)(x-1) = log9 x-1 = (log9/log5) x= (log9/log5)-1 x = 2.3652 Logarithm help - Joe, Friday, September 18, 2015 at 10:55pm ...
*September 19, 2015*

**math**

3/4 = 0.75 0.75*100 = 75 75 percent
*September 19, 2015*

**Logarithm help**

The answer in the textbook says -0.398. I don't think the answer above gives me -0.398.
*September 18, 2015*

**Logarithm help**

I really need help
*September 18, 2015*

**Logarithm help **

using logarithms to solve exponential equations. 5^1+x = 2^1-x I need exact numbers. I did one on my own already. 5^x-1 = 9 5^x-1 = 9 log(5^x-1) = log9 (log5)(x-1) = log9 x-1 = (log9/log5) x= (log9/log5)-1 x = 2.3652
*September 18, 2015*

**Logarithm help**

For the related question below, you did part B instead of A. I need help for part A.
*September 18, 2015*

**Logarithm help **

Use logarithms for these questions After every 10 pages of painting, the ribbon in the dot matrix printer loses about 0.5% of its ink. A) What percent of the ink is left in the ribbon after printing 100 pages and 1000 pages I have no idea how to solve this question. I need help.
*September 18, 2015*

**Logarithm help please**

Express y as a function of x. What is the domain? Explain your answer. log4y = x + log4 Solving exponential equations with logarithms Solve to the nearest thousandth. 5^1+x = 2^1-x
*September 18, 2015*

**Math**

Tate has bag of golf balls: 3 red, 5 blue, 2 yellow, and 2 green. What is the probability that he pulls out a red one, replaces it, and then pulls out another red one?
*September 18, 2015*

**Chem/bio question**

4565
*September 16, 2015*

**Physics**

angles are A=20.0 degrees and B=60.0 degrees
*September 9, 2015*

**Physics**

The three displacement vectors in the drawing have magnitudes of A = 5.48 m, B = 5.23 m, and C = 4.75 m. Find the resultant ((a) magnitude and (b) directional angle) of the three vectors by means of the component method. Express the directional angle as an angle above the ...
*September 9, 2015*

**physics**

During takeoff, an airplane climbs with a speed of 120 m/s at an angle of 33 degrees above the horizontal. The speed and direction of the airplane constitute a vector quantity known as the velocity. The sun is shining directly overhead. How fast is the shadow of the plane ...
*September 8, 2015*

**Chemistry**

So this is what I did 706torr-17.54=742.46 Then plugged into P1V1=P2V2 (742.46)V1=(760)(200) Solved for V1, and I got 205ml (3 sig figs) Is this right? Thanks for all your help!
*September 7, 2015*

**Chemistry **

What volume of “wet” methane would have to be collected at 20.0 oC and 760.0 torr to be sure the sample contained 2.00 x 102 ml of dry methane at the same temperature and pressure ? My Work: All I have so far is that I use P1V1=P2V2 but I don't know the ...
*September 7, 2015*

**Chemistry**

if 75.0 ml of 1.5m sodium hydroxide reacts with 100.0 ml of 2.0m phosphoric acid, to give sodium phosphate and water, how many grams of Na3Po4 may be produced?
*September 1, 2015*

**Math**

I Got the same question on this so I get it now
*September 1, 2015*

**Chem **

The smallest identifiable unit of a compound is a(n) which is made up of which are chemically combined
*September 1, 2015*

**cheistry**

Fractional distillation is suitable for separation of miscible liquids with a boiling point difference of about 25 K or less. What part of fractional distillation apparatus makes it efficient and possess an advantage over a simple distillation process. Explain using a diagram.
*August 21, 2015*

**Physics**

The stoplights on a street are designed to keep traffic moving at 34 mi/h. The average length of a street block between traffic lights is about 80 m. What must be the time delay between green lights on successive blocks to keep the traffic moving continuously? There are 1.609...
*August 20, 2015*

**Physics**

On a drive from your home to town, you wish to average 44 mph. The distance from your home to town is 106 miles. However, at 53 miles (half way), you find you have averaged only 33 mph. What average speed must you maintain in the remaining distance in order to have an overall ...
*August 20, 2015*

**maths**

x^2+y^2=25^2 2x+2y.dy/dx=0 dy/dx=-x/y dy/dt=dx/dt.dy/dx =(0.3).(-x/y) =(0.3).(-15/20) =-0.225m/s
*July 24, 2015*

**Math**

z2(pi)rh=2(0.064)2(pi)r + 0.064(2*pi*h) z2*pi*r^2= 0.064(2*pi*r) pi*r^2h=1567.8 Find z,r,h
*July 22, 2015*

**Differential Equation**

(xD-1)D
*July 7, 2015*

**Math**

Show that the curve with parametric equations x=tcost, y=tsint, z=t lies on the cone z^2=x^2+y^2
*July 5, 2015*

**Math**

4x-e^(-(4x-y+3))=-e^(-2) y=________ I have tried multiple times and cant get it. Please help
*June 24, 2015*

**Math**

Thank you!
*June 24, 2015*

**Math**

e^(x-y)=-x+C where y(2)=2 so I found C=3? y=_____________ so I thought it would be y=-ln(-x+3)-x but that is wrong please help!
*June 24, 2015*

**psy 410**

1. Which of the following is NOT usually one of the effects of abuse on a child?
*June 18, 2015*

**Differential equation**

well when I set it up i get Ce^(-5ln(x+4))*integral(e^(5ln(x+4)*(16/(x+4)^2) which i think brings me to Ce^(-5ln(x+4))*(4(x+4)^4) which would simplify to: Ce^(-5ln(x+4))+(4/(x+4)) am I doing the process right because this is where I am getting stuck. I understand the ...
*June 15, 2015*

**Differential equation**

A first order linear equation in the form y′+p(x)y=f(x) can be solved by finding an integrating factor μ(x)=exp(∫p(x)dx) (1) Given the equation (x+4)^2y′+5(x+4)y=16 find μ(x)= I found it to be e^(5ln(x+4))which is correct** (2) Then an explicit ...
*June 15, 2015*

**Area/volume of hollow figure**

A hollow box 10x10in with a thickness of 1in with a length of 500 Would the area be (10*10) Would the volume be ((10*10)-(9*9))*500
*June 15, 2015*

**case study**

Fred and Zuma Palermo contacted Colorado Carpet Installation, Inc., for a price quotation on providing and installing new carpeting and tiling in their home. In response, Colorado Carpet submitted a written proposal to provide and install the carpet at a certain ...
*June 13, 2015*

**Differential equation**

y′=12x^(3)sqrt(1+x^4)(1+y^2), y(0)=1 ⇒ y= Thanks!
*June 12, 2015*

**Differential equation**

awesome! thank you so much! I see where I went wrong! Would it be ok if I asked you another one I am having trouble with?
*June 12, 2015*

**Differential equation**

y′=8e^(4x)(1+y2)solve for y(0)=−2 ⇒ y= I tried to solve the problem and got the equation: tan^-1((2e^(4x)-2+tan(-2)))it says I am wrong and I resolved and got the same thing I must be doing something wrong please help!
*June 12, 2015*

**Basic Differential Equation**

I cant really follow how you got your work...
*June 5, 2015*

**Basic Differential Equation**

Hi all. I need help understanding something my book dosn't go over well. For example dy/dx=-4y is a given solution and I need to find the differential equation. I simply isolate y then integrate. Getting y=e^(-4x) which is correct. My question is for something like (d^2y...
*June 5, 2015*

**LA**

1 a 2a 3 d 4 c
*June 3, 2015*

**algebra**

Find the equation of a horizontal line that goes through the point (5, -3). Explain your answer
*May 12, 2015*

**chemistry**

How much of a 6.0M sucrose solution should you use to make 77.0mL of a 0.055M solution?
*May 8, 2015*

**Calculus**

Find the average value of the function f(x)= 8/ (3+x)^2 on the interval [0,2]
*May 6, 2015*

**Calculus**

A cable that weighs 3 lb/ft. is used to lift a golf cart which weighs 700 lbs up to the deck of a boat which is 300 ft above a loading dock. Find the work done.
*May 6, 2015*

**Calculus**

The region bounded by y= e^x, y=0, x= -1 and x=1 is rotated about the x-axis, find the volume generated.
*May 6, 2015*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by y= x^(1/3), and y= x about the line y=1
*May 6, 2015*

**Calculus**

Find the volume of the solid obtained by rotating the region bounded by y= x^2, y=0, and x=3 about the x-axis.
*May 6, 2015*

**Calculus**

Find the area of the region bounded by the curves y=x^2 - 2x and y= x + 4
*May 6, 2015*

**Econ**

I think it is A & C, but am not sure.. In a perfectly competitive market in which no market failure occurs and no government policy interferes with the equilibrium price and quantity: a. deadweight loss is zero b. the sum of producer and consumer surplus is maximized c. ...
*April 25, 2015*

**Microecon**

Juan mows lawns in his neighborhood for extra money. Suppose the demand for lawn mowing in Joe’s neighborhood is: QD = 48 – 2P and that the supply of lawn mowing (Juan’s willingness to mow lawns) is: Qs = -12 + P. The market-clearing price of lawn mowing is $...
*April 25, 2015*

**Interest**

Jim opens a savings account with a deposit of $10,000. If the account has an annual interest rate of 6%, compounded quarterly, how much is in the account after one year? (Assume that he does not make any withdrawals. Round only your final answer to the nearest cent.)
*April 24, 2015*

**math**

A boat leaves port P and steers 5 km due east and then 10 km on a bearing of 060 degrees. Find its distance and bearing from P
*April 19, 2015*

**Math**

Jennifer rode her bike to the store at a rate of 15 mph. She rode back home at a rate of 10 mph. How far is it to the store if the round trip takes an hour?
*April 19, 2015*

**Science**

Simply standing. 71.1kg.
*April 19, 2015*

**Science**

Estimate the pressure that is exerted on the ground by an average female. In runners? and then In "high heels"?
*April 19, 2015*

**PHYSICS**

Determine the resulting temperature when 1kg of ice at 0 Degree celcius is mixed with 9kg of water.
*April 12, 2015*

**PHYSICS**

In a power plant the high pressure turbine trips due to an unauthorised valve shutdown. What are a) what is the angular acceleration of the turbine blade? b) what is the distance travelled by a point on the rim of the turbine blade during the acceleration? c) what is the ...
*April 9, 2015*

**Math**

[1 0 -5 0 1 3 0 0 0]
*April 9, 2015*

**Math**

A. you have one independent event then make a choice dependent on that. wrong answer. B. Two independent events, correct answer. C. The chance a person who is not yet picked increases as more and more people get picked, dependent event, wrong answer. D. Same as C, dependent ...
*April 8, 2015*

**Business math**

At the beginning of each year, Al rose invested $1,200 semiannually at 12 percent for 8 years. The cash value of the annuity due at the end of the eighth year is?
*April 7, 2015*

**physics**

An elevator and its load have a combined mass of 1962 kg. Find the tension in the supporting cable when the elevator, originally moving downward at 7.5 m/s, is brought to rest with constant acceleration in a distance of 4.2 m.
*April 6, 2015*

**physics**

a 50g slug is shot from a rifle at 900m/s a) what is the KE of the slug? b) how much work is done on the slug if it starts from rest?
*March 30, 2015*

**phusics**

oil is pumped at 31000/liters/min into a tank 25m above the ground.(1lter of oilhas a mass of 0.68kg) a) what power, in kw, must be delivered by the pump? b)what is the increase in PE of ht eoil after 10 minutes? c)Find the increase in PE of the oil after 10minutes if the tank...
*March 30, 2015*