Friday

February 12, 2016
Total # Posts: 552

**physics help**

A homogeneous disk of mass m and of radius r free to rotate without friction about its horizontal axis, is used used as a pulley. An extensible string of negligible mass is wound around this pulley and a mass M is connected to its free end. When the system is released the ...
*February 9, 2016*

**chemistry help plz**

A potassium permanganate solution containing 1.58g of KMnO4 per liter is added into 5 ml of an acidified iron (||) sulfate solution. Decolorizing of KMnO4 solution has been added .Calculate the mass of FeSo4.7H2O which has been dissolved in one liter of solution.
*January 17, 2016*

**chemistry**

Thx
*January 17, 2016*

**Algebra**

I don't have a close about this question !!!!!!!! It takes you 3 hours to drive to a concert 135 miles away. You drive 55 miles per hour on highways and 40 miles per hour on the rest of the roads. How many miles do you drive on highways? The rest of the road?
*January 3, 2016*

**Physics **

You have a boat that is capable of moving at 10.4 m/s through still water. You wish to cross a river that flows due west at 2.8 m/s. At what numerical compass heading must you pilot your boat so that you will reach a destination that is due south of your current position?
*December 11, 2015*

**think tac toe 2 adding and subracting decimals 2.**

Tim tracked the change in outside temperature one afternoon. He record a temperature of 98.3 degrees at noon. Bathe temperature then rose 5.32 degrees f over the next four hours at 5:00 pm. Tim recorded a temperature change of 108.57 degrees F, How did the temperature change ...
*November 27, 2015*

**math**

(For this, i know the equation for constant of variation is y=kx, but i just forgot how to solve it)For the eqaution -4y=8x, what is the constant of variation? A. -4 B. -2 C. 1 D. 2
*November 10, 2015*

**Math**

If n represents a number, write an expression for one-half of three less than the number.
*November 8, 2015*

**physics**

an object of mass 10kg moves in a circle of radius 13m of uniform speed of 43m\s a) calculate the angular velocity b) the centripetal force
*November 8, 2015*

**Physics**

A 1-m-tall barrel is closed on top except for a thin pipe extending 6.0 m up from the top. When the barrel is filled with water up to the base of the pipe (1 m deep) the water pressure on the bottom of the barrel is 10 kPa. What is the pressure on the bottom when water is ...
*November 6, 2015*

**algebra**

1. Given the line with the equation : a) Find at least three ordered pairs that satisfy the equation. b) Find the slope of the line. c) Graph the line 2. Given the line with equation : a) Write the equation in slope-intercept form. b) State the slope of the line. c) State the ...
*October 25, 2015*

**Language arts**

Thank you so much. :) Have a great rest of the day!
*September 15, 2015*

**Language arts**

Ohhhhhh. Okay, Got it. So like for example, "She MOVED to Michigan"?
*September 15, 2015*

**Language arts**

I see. So it would be A then...? & Thank you for explaining all of those.
*September 15, 2015*

**Language arts**

What is the principle part of the italicized verb in this sentence (suppressed) from "The Story-Teller"? The aunt suppresed a gasp of admiration. A. Present B. Present participle C. Past D. Past participle I think it's D.....But im lost on the meanings of them ...
*September 15, 2015*

**maths**

the third term of an AP is 5 while the 7th term is 13 find the 30th term of the AP
*August 11, 2015*

**new era**

the third term of an AP is 5 while the 7th term is 13,find the 30th term of the AP
*August 11, 2015*

**Chemistry II**

How many grams of gasoline would you need to burn if you started with a 275 gram piece of ice that started at -25 OC and by the end of the experiment had 100 grams of steam and the rest liquid water?
*July 21, 2015*

**Science**

Thank you so much
*May 17, 2015*

**Science**

What is the similarities between conduction and radiation What is the similarities between convection and radiation
*May 17, 2015*

**Math**

John has 4 cups filled with fruit juice.He said that he has a gallon of fruit juice.Is his statements reasonable?explain why or why not.
*March 16, 2015*

**math**

Mrs. Bollo's second grade class of thirty students conducted a pet ownership survey.results of the survey indicated that 8 students own a cat, 15 students own a dog and five students owned neither a cat or a dog. how many of the students surveyed owned neither a cat nor a ...
*March 13, 2015*

**Math**

I thought about not making sure you are bind to a contract. multiplying $28.00 by .30 will give you the total cost. Than do the same with the others to come up with your answer. If someone else has a better way to find the answer, please let them know.
*March 8, 2015*

**math**

bobs monthly phone bill is made up of a 10.00 fee plus $0.05 per min.bobs phone bill for july was 22.00 write an equation to model the situation using m to represent the number of min. solve the bequation to determine the number of phone mins.bob used in july
*March 3, 2015*

**Early Childhood**

Question 17 of 20 5.0 Points A possible explanation for a child who lacks practice in auditory analysis and reasoning skills is: A. that both parents are working. B. the passive lifestyle of watching TV. C. a learning disability. D. a lack of good nutrition and overall health.
*February 19, 2015*

**Early Childhood**

Small group discussions with preschoolers enables them to: A. find out if they are superior. B. learn to argue. C. outsmart the others and gain teacher attention. D. compare their ideas with peer ideas.
*February 19, 2015*

**Early Childhood**

A preschooler with a vocabulary of about 4,000 words would be considered: A. a slow developer. B. advanced. C. very advanced.
*February 19, 2015*

**physics**

An unknown substance with a mass of 300 g absorbs 1000 j of heat while undergoing a temperature increase of 15 degrees c. What is the specific heat of the unknown substance ?
*January 23, 2015*

**Math**

Ben is making wooden toys for the next art and craft sale each toy cause Ben $1.80 to make. If he sells the toy for three dollars each how many will he have to sell to make a profit of exactly $36?
*January 8, 2015*

**IPC**

If the specific heat of water is 1.0 calorie/gram°C, how many calories are required to raise 500 grams of water 10.0°C?
*November 18, 2014*

**ecnomics**

4.During the energy crisis of the 1970s, and again in the last 5 years, Congress bemoaned the “price gouging” and “windfall” profits of the major oil companies. In the 1970s Congress imposed an “excess profits tax” on these companies. It did not ...
*November 5, 2014*

**global, history**

5 contributions of Ancient Greece to modern society
*October 22, 2014*

**Chemistry**

when 2 moles of potassium chlorate crystals decompose to potassium chloride crystals and oxygen gas at a constant pressure and temperature, 78.0 kj of heat is given off. write a thermodynamic equation for this reaction.I don't know how to set up the equation i know that ...
*October 16, 2014*

**physics**

A ball starts from rest and rolls down a hill with uniform acceleration, traveling 200m during the second 4.8s of its motion. How far did it travel the first 4.8 seconds
*September 16, 2014*

**math**

An optometrist dilates a patient's pupils by a scale factor of 3. Should the patient's pupil enlarge or reduce?
*September 4, 2014*

**Social Science - Science**

Post a behavioral research situation that could use a Pearson coefficient and chi square research study. Present the rational for each selection.
*July 25, 2014*

**chem**

first you do n=m/M to get your moles then use you moles and the -3209.0 to geyt your kj then solve for the heat capacity by using the equation q=mct to rearrange to c=q/mt
*July 13, 2014*

**chemistry**

Calculate the volume that4.0mol of an ideal gas would occupy at 8.0 atmospheres pressure and 1700c (R=8.31mol-1k-1)
*April 24, 2014*

**life orientation**

Identify 3 study fields/paths in order of preference and provide two reasons for each choice
*March 22, 2014*

**math**

For a motor vehicle traveling at r miles per hour, the distance d in feet required to stop is approximately d=0.05r^2 + r. If a school bus is traveling at 45 mph, how many feet, to the nearest foot would it travel?
*December 14, 2013*

**Help**

No problem! Sometimes teachers are ambiguous at times but I am in early childhood education as well and were learning about screening and behavior, so I guess it would be D
*November 29, 2013*

**Medical Billing & Coding**

345.91-y
*November 1, 2013*

**Child care**

What fundamental motor patterns do girls attain quicker than boys
*October 11, 2013*

**statistics**

the life spans of three randomly selected tires are 31,400 miles, 40,600 miles and 36,000 miles. Using the empirical rule, find the percentile that corresponds to each life span.
*September 8, 2013*

**English 101**

memo given in which there was no punctuation...only sentences. Please let me know if I have put the semicolon, etc in right place and if third shift should be hyphenated. Thanks!!! Our production plant has made the decision to run third shift and weekends to complete the line ...
*June 21, 2013*

**English 101**

Is this memo correct (semi-colon) in right sentence and time/date correct? Thanks! There were no punctuations at all when we were given this. We are going to make a few changes in the health plan we now offer; The Economy Plan and the Standard Plan—both of these will be ...
*June 21, 2013*

**English 101**

just wanted to make sure there should be a comma between one-level and brick. Also, three and two should be spelled out. There is one home that I think would meet your needs the best. This home is located at 8 Second Avenue; it is a one-level, brick home with three bedrooms ...
*June 11, 2013*

**english**

Is the following sentence correct? This home is located at 8 Second Avenue; it is a one-level brick home with three bedrooms and two baths.
*June 11, 2013*

**algebra**

(a1/2b)1/2(ab1/2) how to simplify expression and write with positive exponent
*May 20, 2013*

**chemictry**

how many gramms are in barium carbonate with 200g and 7.3% of hydrochloric solution
*May 16, 2013*

**life orientation**

providerecommendations on how to address the topic that you identified in the previous question.
*May 5, 2013*

**math**

8. At TelePower Plus, long-distance phone calls to China cost $0.59 for the first minute and $0.25 for each additional minute, plus an additional roaming charge of $2.50. If the total charge of a call to Beijing was $11.84, how many minutes did the call last? (Points : 2)
*April 30, 2013*

**calculus**

39x + 75y over the square root of 97 =650 how do I solve this?
*April 25, 2013*

**business**

an attempt to minimize the problem of wage-rate compression, organizations may incorporate all of the following ideas except: Answer giving larger increases to high-performance employees. preparing high-performance employees for promotion to high- salary jobs. providing ...
*March 30, 2013*

**statistics3. Sick-leave records obtained from a ra**

3. Sick-leave records obtained from a random sample of 200 social workers showed a mean number of days sick leave equal to 25.6 last year. If the sample standard deviation is 5.1, construct a 90% confidence interval for the mean number of days sick leave for all social workers...
*March 29, 2013*

**chemistry**

if a gallon of antifreeze weighs 8.75 pounds. what is the density of the antifreeze in g/ml?
*March 3, 2013*

**math**

a person deposits five hundred dollars in a savings account that pays 5% annual interest that is compounded yearly. At the end of ten years, how much money will be in the savings account?
*February 18, 2013*

**statistics**

A study found that 81% of households in the United States have computers. Of those 81%, 92% have Internet access. Find the probability that a U.S. household selected at random has a computer and has Internet access.
*February 7, 2013*

**physics**

in order to catch a fast moving softball with your bare hand doing this reduce the catching forcebecause the what
*February 1, 2013*

**physics**

a frieght train rolls at the same speed but has twice as much mass its momentum is
*February 1, 2013*

**physics**

find the impulse on a baqseball that is hit 80N of force in a time of 0.52 s
*February 1, 2013*

**phy**

adddcabbadbbaaaacdaad
*January 28, 2013*

**Physics **

A 46.6 kg crate is at rest on a level floor, and te coefficient of kinetic friction is 0.32. The acceleration of gravity is 9.8M/s^2. If the crate is pushed horizontally with a force of 201.67 N, how far does it move in 3.42s? Answer in units of m
*January 22, 2013*

**math**

jordan has a bag that contains 246 marbles. there are 51 brown marbles and 195 gray marbles. estimate the percent of the brown marblesin the bag.
*January 10, 2013*

**physics**

What is k in the formula (3/2)kT
*January 7, 2013*

**physics**

What is k in the formula (3/2)kT
*January 7, 2013*

**physics**

What is k in the formula (3/2)kT
*December 31, 2012*

**Please HELP with this storie problem**

use a matrix
*December 13, 2012*

**Algebra 2**

thankss (:
*December 13, 2012*

**Algebra 2**

Simplify. (2-5i)-(3+4i)
*December 13, 2012*

**Algebra 2**

omg thank you soooo much (:
*December 13, 2012*

**Algebra 2**

thank you do you know how to do it though?
*December 13, 2012*

**Algebra 2**

The numbers iã5 and -iã5 are solutions to which equation? a. x^2+ã5=0 b. x^2+5=0 d. x^2-5=0
*December 13, 2012*

**english**

Can some check this for me thanks
*December 10, 2012*

**english**

1. A 2. B 3. D 4. D
*December 10, 2012*

**english**

1.Identify the reason for the comma(s) in the following sentence: When you have the opportunity to interview for a job, you can improve your chances for consideration by dressing for success. a.To join two independent clauses (along with a conjunction) b.To separate an ...
*December 10, 2012*

**Math**

Find the equation of the line that passes through the pair of points. Write your answer in slope-intercept form (2,-5)(2,-1)
*December 8, 2012*

**chemistry**

0.0386mol glucose in 88.0ml of solution
*December 8, 2012*

**Psychology**

How does biological and environmental factors shape our cognitive processes?
*December 6, 2012*

**Psychology**

How does one's cognitive processes shape some aspects of personality?
*December 6, 2012*

**Finance**

You own a portfolio that has $1500 invested in Stock A and $2,600 invested in Stock B. If the expected returns on these stocks are 11.1 percent and 16.7 percent, respectively, what is the expected return on the portfolio?
*November 25, 2012*

**math**

bill and ted combined age is 40. Eight years ago, bill was 2 years younger than ted is now. how old is bill now?
*November 6, 2012*

**Calculus**

1. Locate the absolute extrema of the function f(x)=cos(pi*x) on the closed interval [0,1/2]. 2. Determine whether Rolle's Theorem applied to the function f(x)=x^2+6x+8 on the closed interval[-4,-2]. If Rolle's Theorem can be applied, find all values of c in the open ...
*October 30, 2012*

**grammar - sentence structure**

I was wondering if you could tell me if my sentence structure using ":" and quotations is correct... Furthermore, when Howard states: “If I had a spot, I'd slap you in” (54:14), and “everybody has to pull his own weight” (54:30), he uses the ...
*October 26, 2012*

**Precalculus**

A barn has 150 feet of fencing and there are 3 rectangular corrals of identical dimensions along the back wall of the barn. The sides of each corral are attached to the barn and fencing is not needed along the back wall of the barn. If each corral is 30 ft. long (front to back...
*October 8, 2012*

**Precalculus**

A barn has 150 feet of fencing and there are 3 rectangular corrals of identical dimensions along the back wall of the barn. The sides of each corral are attached to the barn and fencing is not needed along the back wall of the barn. If each corral is 30 ft. long (front to back...
*October 8, 2012*

**geometry**

what is the base length of a paralleogram whose area is 52 m squared and whose height is half is based lenghth
*September 18, 2012*

**Physics**

Trying to be on time for class, a girl moves at 2.4 m/s down a 52 m-long hallway, 1.2 m/s down a much more crowded hallway that is 79 m long, and the last 25 m to her class at 3.4 m/s. How long does it take her to reach her class?
*September 18, 2012*

**simplify expression.**

|7|+|-14|
*September 17, 2012*

**math**

81 boys and 81 girls
*August 23, 2012*

**chemistry**

_mg(OH)†? + _H2SO4._mgSO4 + _H2O
*August 21, 2012*

**Trigonometry**

Find the exact value of tan2(Beta) if sin(Beta) = 5/13 (Beta in Quadrant II)
*August 12, 2012*

**Trigonometry**

Write 2sin37(degrees)sin26(Degrees) as a sum (or difference)
*August 12, 2012*

**Calculus**

Find the centroid of the area bounded by the parabola y = 4 - x^2 and the x-axis. A. (0,1.6) B. (0,1.7) C. (0,1.8) D. (0,1.9) Find the average value of the function i=15(1-3^-1/2t) from t=0 to t=4. A. 7.5(1+e^-2) B. 7.5(2+e^-2) C. 7.5(2-e^-2) D. 7.5(3-e^-2)
*August 7, 2012*

**Calculus**

evaluate (integral) xe^2x dx A. 1/6x^2 e^3x+C B. 1/2xe^2x-1/2e^2x+C C. 1/2xe^2x-1/4e^2x+C D. 1/2x^2-1/8e^4x+C Evaluate (integral) e^3x cosh 2x dx A. 1/2e^5x + 1/2e^x +C B. 1/10e^5x + 1/2e^x + C C. 1/4e^3x + 1/2x + C D. 1/10e^5x + 1/5x + C
*August 7, 2012*

**Calculus**

to evaluate (integral) 3x^2 cos (2x^3-4) dx, it is necessary to let A. u=3x^2 B. u=6x C. u=2x^3-4 D. u=6x^2
*August 4, 2012*

**Calculus**

Which of the following is a step in evaluating. (Integral) cos^2 5x dx A. (Integral) 1+cos10x/2 dx B. (Integral) 1-cos10x/2 dx C. (Integral) 1+cos10x/20 dx D. (Integral) 1-cos10x/20 dx
*August 4, 2012*

**Calculus**

Evaluate (integral) e^3x dx. A. e^3x + C B. 1/3e^3x + C C. e^4x + C D. 1/4e^4x + C
*August 4, 2012*

**Calculus**

Evaluate (Integral) sin 4x cos^2 4x dx. A. Cos^3(4x)/3 + C B. -Cos^3(4x)/3 + C C. Cos^3(4x)/12 + C D. -Cos^3(4x)/12 + C
*August 4, 2012*