Thursday

September 3, 2015
Total # Posts: 1,000

**physics**

a 10kg wood ball hangs from a 1.1 m long wire. The maximum tension the wire can withstand without breaking is 600N. a .9 kg projectile traveling horizontally hits and embeds itself in the wood ball. What is the largest speed the the projectile can have before the cable breaks
*October 2, 2011*

**algebra**

jopfjqopegfjq
*October 1, 2011*

**Anatomy**

I have a question: The process that traps solids in the cell membrane and brings them into the cell is which of the following:I'm almost positive it i pinocytosis, correct? pinocytoais phagocytosis ion pumps
*September 28, 2011*

**Chemistry**

Cryolite, Na3AlF6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation: Al2O3(s) + NaOH(l) + HF(g) -> Na3AlF6 + H2O(g) If 14.0 kilograms of Al2O3(s), 57.4 kilograms of NaOh(l), and 57.4 kilograms of HF(g) react ...
*September 18, 2011*

**STATS**

The top selling Red and Voss tire is rated 70,000 miles means nothing. In fact, the distance the tires can run until they wear out is a normally distributed random variable with a mean of 82,000 miles and a standard deviation of 6,400. a. What is the probability that a tire ...
*September 16, 2011*

**science**

The making of the nuclear reactor was an advance in
*September 16, 2011*

**Biochem**

Desribe the preparation of 2.00 L of 0.100M pH 9.00 glycine starting with the sodium chloride salt of zwitterionic glycinhe and 1.00M NaOh. If a reaction that generated 2.00 mmoles of base were carried out in 100 mL of the above buffer, what would be the final solution pH? ( ...
*September 13, 2011*

**algebra**

Find the length of each kind of shark. The white Shark is 18ft long. The oceanic whitetip shark is 2/3 the length of the tiger shark.
*September 11, 2011*

**Spanish**

Thank you for answering
*September 8, 2011*

**Spanish**

So I didn't mean to put Te llamo Isabel as the usual way, I meant to say Me llamo Isable is the way I think we put it because that wouldn't involve reflexive in this case, I don't think.
*September 8, 2011*

**Spanish**

Hi we just relexive verbs and I'm already stuck Please check this answer ¿Cómo te llamas? 1. Me llamas Isabel 2.Te llamas Isabel 3.Te llamo Isabel 4.Me llamo Isabel Would it be "Me llamo Isabel?" because Te llamo Isabel is the usual way Also Te ...
*September 8, 2011*

**Pre-Calculus**

I can answer my own question-NO yours makes more sense. Its the first day of these so I'm still alittle confused. Thank you for helping
*September 1, 2011*

**Pre-Calculus**

I came up with (x+5)(x+6) = 0 x^2 - 11x + 30 = 0 Would that also be correct? Thank you for helping
*September 1, 2011*

**Pre-Calculus**

I need to write a polynomial of the smallest degree with roots 5 and 6 and the answer can't have parentheses. Can someone point me in the right direction. I have several of these to do.
*September 1, 2011*

**physics**

You are driving south on a highway. Then, without changing speed, you round a curve and drive west. Do you accelerate?
*August 31, 2011*

**physics**

You are driving north on a highway. Then, without changing speed, you round a curve and drive east. Does your velocity change?
*August 31, 2011*

**maths**

the diameter of a wheel is 84cm? How far it travels in one turn?
*August 30, 2011*

**ETH125**

what changes has the US made to certain polices concerning the treatment of Muslims and Arabs?
*August 25, 2011*

**geology**

How do oceans regulate climate?
*August 2, 2011*

**Math**

Suppose the interest rate is 8% APR with monthly compounding. What is the present value o an annuity that pays $90 every 6 months for 5 years?
*July 14, 2011*

**Med terms**

I find nine(9)words, but I need ten (10) I do not know what I am missing. But I am missing a word and place my finger on it. Dob chronic obstructive pulmonary disease (COPD) aphonia sputum apnea days dyspnea paroxysm ventilator So what is I missing here?!
*July 12, 2011*

**educational statics**

how often does the university admit an exception student with a SAT score of x =700 or above Asample of 36 students (N)- 36 were randomly selected with mean (=11,and standard deviation (x=12. the sample mean score X=9.
*July 10, 2011*

**educational statics**

the average SAT score at a local university is (=60, and standard is (x=50. Assume that the university SAT score has a normal distribution convert a student score x=700 into z score
*July 10, 2011*

**algebra 2**

1) In the general second-degree equation Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0, what is the discriminant and what does it tell you about the graph of the equation? 2) Which terms in a general second-degree equation (Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0) are used to find the ...
*July 10, 2011*

**stats**

For a normal distribution where mx= 80 and sx= 10, the distribution model fits well to test scores of N = 20000 students.
*July 10, 2011*

**business communication**

A~handwritten applications
*June 19, 2011*

**MATH**

3 PIZZAS WERE EACH CUT INTO 8 PIECES. TEN OF THE PIECES WERE EATEN FOR LUNCH
*May 29, 2011*

**Pre-Cal**

From a point 50 feet in front of a church, the angle of elevation to the top of the steeple is 48 degrees. Find the overall height of the church and steeple.
*May 23, 2011*

**algebra**

a number is represented by the variable x at least is represented by the ≥ symbol and the last part of the inequality is 15 so the answer is x ≥ 15
*May 19, 2011*

**math **

what is 25 more than 5 times and number and x
*April 29, 2011*

**Mathematical for Educators 1**

Jim bought two shirts that were originally marked at $40 each. One shirt was discounted 20% and the other was discounted 25%. The sales tax was 4.5%. How much did he spend in all
*April 21, 2011*

**English**

what is the simple predicate in the sentence, I could hear the wind blow through.
*April 18, 2011*

**math**

What are the steps to the solution for this problem? What is the difference between 330 and half n equals 114?
*April 13, 2011*

**PENN-FOSTER**

that not what i said you are not making it clearer you are putting words in my mought i look at some one else question she was asking for the anser not help that the one back you should be on not mine because like i said i did not know about this my daughter told me they can ...
*April 11, 2011*

**PENN-FOSTER**

like i said this is my first time on this web page so i did not understand she said let ask them the question because they will help you with the ones you having trouble with i did not just want the anser i taught someone who took it already could explane it better let not ...
*April 11, 2011*

**PENN-FOSTER**

ok i did not know my daughter just told me to go to this web sit and ask any way thank you i did not want th anser i said i was having problems with does questions
*April 11, 2011*

**PENN-FOSTER**

i am not beeing rude i am just not to good with the computer you are been rud i would i would like to know your name and i am not cheating every body bask questions that wat the web site is for thank you
*April 11, 2011*

**PENN-FOSTER**

HI I AM NOW DOING FACILITIES AND STAFF BUT I AM HAVING SOME STRUGGLES WITH NUMBERS 8,9,10, 11,12 I AM ASKING SOME ONE WHO TOOK THIS CLASS TO PLEASE HELP ME
*April 11, 2011*

**chemistry**

a 5.0 dm3 sample of oxygen at a pressure of 200 kPa and 2.0 dm3 sample of nitrogen at a pressure of 500 kPa are introduced into a 2.5 dm3 vessel. what is the total pressure in the vessel?
*April 10, 2011*

**introduction to accounting**

a merchandising company wants to include the cost of operating its warehouse in the cost of inventory. The company’s controller argues that the cost of the warehouse is a reasonable and necessary cost of getting the inventory ready for sale and, therefore, should be ...
*April 7, 2011*

**statistics**

5. Congressional Committee Memberships The composition of the 108th Congress is 51 Republicans, 48 Democrats, and 1 Independent. A committee on aid to higher education is to be formed with 3 Senators to be chosen at random to head the committee. Find the probability that the ...
*March 24, 2011*

**Algrebra 1**

x2(squared)-12=-x solve by completing the square
*March 20, 2011*

**Chemistry**

Thanks a lot! I realized that I forgot to account for the volume change when I calculated my molarities for the base and the acid, and that was enough to get the pH off by 0.01.
*March 18, 2011*

**Chemistry**

Okay, so I found the ion concentrations through the Henderson-Hasselbalch equation, and the concentrations I got: [Acetic Acid] = 0.036525666 [Acetate] = 0.063474334 I got the same concentrations as when I did my ice chart, and I also got the same delta pH, which was -0.266.
*March 18, 2011*

**Chemistry**

Here's what I did: So I set values for: [Acetic Acid] = y [H3O+] = 10^-5 [Acetate] = 0.1M - y Ka = 10^-4.76 And from the equation: Ka = [Acetate][H3O+]/[Acetic Acid], I found y, or the molarity of acetic acid, to be 10^-6/(10^-5 + 10^-7.46). And from this, I also got the ...
*March 18, 2011*

**Chemistry**

I did everything from the beginning and I didn't round anything at all until my last step where it told me to round to two decimal places. I still can't get the answer, though
*March 18, 2011*

**Chemistry**

Sorry, I forgot to say that it told me to round it to two decimal places.
*March 18, 2011*

**Chemistry**

A beaker with 100 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.10 mL of a 0.260 M HCl solution to the beaker. How much will the pH change? The pKa of acetic ...
*March 18, 2011*

**physics**

10 k r point g point degree
*March 17, 2011*

**English**

Help me write an essay on How I learned English by Gregory Djanikian.
*March 16, 2011*

**astrology of GEO PHYSICS**

3 point 666 point one fifth degree
*March 13, 2011*

**algebra**

It takes 7 hours for Will to paint a house. Judy can paint the same house in 3 hours. How long will it take them to paint the house if they work together?
*March 11, 2011*

**math**

2.75 divided by 1000
*March 8, 2011*

**Com/171**

What is wrong with this sentence: The diplomats are doing what they can to restore peace.
*February 28, 2011*

**Com/171**

Your welcome. I was happy to help.
*February 28, 2011*

**physics**

Consider a 1kg mass at rest at the equator.Because of the earths rotation , the mass experiences a centripetal acceleration. a)Draw free body diagram of mass b)Find centripetal force acting in the mass c)Compare apparent weight and true weight d)what fictitious force would the...
*February 24, 2011*

**math**

7x9=63
*February 24, 2011*

**chemistry**

What is the approximate thermal energy in kJ/mol of molecules at 275° C
*February 23, 2011*

**applied statistics**

Discuss how the General Linear Model assigns the optimal “weights” to predictor variables that allow us to maximize prediction accuracy. How are discriminant functions the optimal weighted linear composites for predicting “membership” regarding the ...
*February 20, 2011*

**Science**

If the moon rotated on its axis just as quickly as Earth's, would we always see the same side of the moon? Explain. -thanks, Sandra
*February 19, 2011*

**Office Management**

One taxicab charges 75 cents for the first quarter-mile and 15 cents for each additional mile. The competing taxi company charges $1.00 for the first quarter-mile and 10 cents for each additional mile. 1. what distance would produce the same fare for the two taxi companies? 2...
*February 17, 2011*

**Science**

the answer is B
*February 16, 2011*

**Science**

when comparing the force that is required to climb a mountain walking up a trail that slopes gently upward to the top verses getting there by scaling a sheer vertical face, which of the following is true? (a) you use more force for a giving movement on the walk than on the ...
*February 16, 2011*

**math **

a small mail order company earns a 15% profit on all sales. if the company earned $5250 one month, how much were the total sales.?
*February 16, 2011*

**ap chemisrty**

Kp for the following reaction is 0.16 at 25°C. 2 NOBr(g) 2 NO(g) + Br2(g) The enthalpy change for the reaction at standard conditions is +16.3 kJ. Predict the effect of the following changes on the position of the equilibrium; that is, state which way the equilibrium will ...
*February 15, 2011*

**math**

width=w length=4w P=2(l+w) =2(4w+w) =10w
*February 15, 2011*

**math**

Stacy multiplied 5x9 and said the answer was 44. What two patterns could you use to show that her answer is not correct?
*February 13, 2011*

**Chem 262**

What solvents would you use to isolate these compounds? Malonic Acid Salicylic acid Ethyl4-aminobenzoate
*February 10, 2011*

**Algebra**

I cant write the sign for square root so I will just write it out. The problem says to simplify square root 5w^8v square root 20xu^2 I don't know how to figure out this problem.
*February 4, 2011*

**ap chemisrty**

When heated, cyclopropane is converted to propene. Rate constants for this reaction at 470°C and 510°C are k = 1.10 10-4 s-1 and k = 1.02 10-3 s-1, respectively. Determine the activation energy, Ea, from these data.
*January 27, 2011*

**chemistry**

he decomposition of nitrogen dioxide at a high temperature is second order in this reactant. NO2(g) NO(g) + 1/2 O2(g) The rate constant for this reaction is 3.40 L/mol·min. Determine the time needed for the concentration of NO2 to decrease from 2.30 mol/L to 1.30 mol/L.
*January 27, 2011*

**science**

Does the mass of water increase when a plastic water bottle filled to the brim with water is frozen?
*January 26, 2011*

**Math 1 9th grade**

A bag contains 3 green marbles and 6 blue marbles. What is the probability of drawing a blue marble, then another blue marble, then a green marble, replacing the marble after each draw?
*January 20, 2011*

**economics**

Suppose the USA and Canada are considering to trade. Assume there are only two goods in the economy: wheat and corn. The table below illustrates what each country can produce in a given year. Wheat Corn USA 4 2 Canada 5 8 In this case, which country should produce wheat? Why? ...
*January 18, 2011*

**world issues**

Identify at least two issues in developing countries that make changing to democracy easier or more difficult. Provide at least one real world example of one of the issues that you identify.
*January 16, 2011*

**Philosophy**

What ideas and events in Europe influence philosophy in the USA. How are these philosophies similar and different?
*January 12, 2011*

**algebra**

sorry about the mix up of 2001 and 2002, but the process is still the same
*January 8, 2011*

**algebra**

the difference between 1995 and 2001 is 6 years, so you add 6 to 73.7 and you get 0.6t+73.7, that's the first set of answers. Next, you replace the t with the 11 to represent the difference between the next set of years (1995 to 2006) so the next set of answers is E(11)= ...
*January 8, 2011*

**practical nurse**

in a 150 words state how you can contribute quality service to health care
*January 4, 2011*

**algebra**

it john 4 hours to mow a lawn it takes maria 3 hours to mow the same lawn, how long would it take if they worked together?
*December 18, 2010*

**C Chemisty**

What mass of hyudrogen peroxide should result when 1.50 g of barium peroxide is reacted with 25.0 mL of 0.50 M of hydrochloric acid?
*December 13, 2010*

**Algebra**

If Dale can paint a room in 5 hours alone and Chip can paint the same room in 7 hours alone. How long would it take them together to pain the room?
*December 3, 2010*

**math**

what type of math problems exemplify the different purposes of variable, and in what way do these different uses of variable can be confusing?
*November 30, 2010*

**math **

P=4xL or P=4L
*November 30, 2010*

**statistics**

given variables list them as independent (x) or as a dependent (y) I weight of child; prescription dosage II monthly commision; monthly sales II ability to concerntrate; level of fatique IV crop yield; rainfall
*November 25, 2010*

**the president and the bureaucracy**

yes there are acts of congress, regulatory rulings, court rulings, the will of the people
*November 23, 2010*

**the president and the bureaucracy**

legally, the bureaucracy derives the general authority for its programs from
*November 23, 2010*

**Algebra**

5x+2y=-11, 7x-3y=13, find x and y
*November 20, 2010*

**math**

How would I setup the equation for the perimeter and area of a similar (6inch width, and 8 inch length)rectangle that is increased by a ratio of 1:n?
*November 16, 2010*

** 7grade math**

Thank you I came to the same conclusion I just wanted to see if I was going in the right direction
*November 16, 2010*

** 7grade math**

using ratio 1:2 find the perimeter of rectangle that has a width of 6 inches and a length of 8 inches? need answer asap
*November 16, 2010*

**College Chemistry**

Stuck on plugging info into formula, please show set up-At 10 degrees C carbon dioide gas has volume of 25.5 mL under pressure of 758 mmHg, what would volume of CO2 be at STP?
*November 9, 2010*

**Chemistry**

Dr. Bob get the use PV=nRT just stuck on setting up the problem help!
*November 9, 2010*

**Chemistry**

Amber, Too funny i have this same question for ec College Chem at Terra! In book page 303, 35 b. Answer back of text lol!!!
*November 9, 2010*

**Chemistry**

If 20.0 g of N2 has a volume of 4.00 L and a pressure of 6.0 atm, what is its temperature?
*November 9, 2010*

**Chemistry**

A mixture of hydrogen and oxygen gas has pressure of 1.60 atm. Partial pressure of oxygen is 304 mmHg atm, what is the partial pressure of hydrogen?
*November 9, 2010*

**chemistry**

what is the net ionic equation for manganese sulfide and hydrobromic acid?
*October 19, 2010*

**6th grade math**

in the order of operations equation 8-(24/8)^2 I Alex answered with 24/8= 3 3^2 = 9 8 - 9 = answer You cannot subtract 9 from 8. So how do you get the answer?
*October 8, 2010*

**6th grade**

how do you solve the math order of operations problem 8-(24/8)^2
*October 8, 2010*

**Algebra**

Help please-I'm doing something wrong- Solve 8x^2 + 6x + 5 = 0 I'm doing square roots and all the steps but it's not working out I come up with -0.38 + 0.5 and -0.38 - 0.5 But it's not right when I go to put it back in. Could you please show the steps-these ...
*October 6, 2010*