Monday

August 31, 2015
Total # Posts: 1,164

**PHYSICS**

A 50cm long hollow glass cylinder is open at both ends and is suspended in air. A source o sound that produces a pure frequency is placed close to one end of the tube. The frequency of the sound is slowly increased from a very low value. The tube is first observed to resonate ...
*August 9, 2011*

**PHYSICS HELP**

A solid cylinder has an area of 10cm2 and a height of 1.0 m. The cylinder is composed of two different materials with mass densities of 2000 kg/m3 and 1500 kg/m3. If each of the two materials occupies an equal volume, what is the mass of the cylinder? Question 3 options: A) 3....
*August 8, 2011*

**PHYSICS - HELP**

I NEED HELP ON C THROUGH F. THANK YOU A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (1) What is the spring constant of the spring? ANSWER: 49N/m (B) If the is pulled down by...
*August 7, 2011*

**PHYSICS - HELP**

Two ingenious 120 student students decide to use an oscillating mass on a spring to check the shutter (exposure) time of their camera. They set up vertically alongside the mass and spring. A pointer attached to the mass allows the scale on the meter stick to be read as ...
*August 7, 2011*

**PHYSICS - HELP**

Two ingenious 120 student students decide to use an oscillating mass on a spring to check the shutter (exposure) time of their camera. They set up vertically alongside the mass and spring. A pointer attached to the mass allows the scale on the meter stick to be read as ...
*August 5, 2011*

**PHYSICS - HELP**

A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (1) What is the spring constant of the spring? ANSWER: 49N/m (B) If the is pulled down by 5.00cm and released, what is the ...
*August 5, 2011*

**PHYSICS -HELP**

A traverse periodic wave described by the expression y=5sin (pi x/3 - 30pi t) (where y and x are in meters and t is in seconds) is established on a string. By reflecting this wave from a rigid support, standing transverse waves are set up on a stretched string. It is observed ...
*August 5, 2011*

**PHYSICS**

Two ingenious 120 student students decide to use an oscillating mass on a spring to check the shutter (exposure) time of their camera. They set up vertically alongside the mass and spring. A pointer attached to the mass allows the scale on the meter stick to be read as ...
*August 4, 2011*

**Physics**

A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (1) What is the spring constant of the spring? A: 49N/m (B) If the is pulled down by 5.00cm and released, what is the frequency...
*August 4, 2011*

**American history**

Nat Turner's Rebellion was a slave rebellion that took place in Southampton County, Virginia during August 1831. A: VIRGINIA
*August 4, 2011*

**Physics**

A spring id vertically, as shown below, and a 500g mass is hung from its lower end. The EQUILIBRIUM extension of the spring is observed to be 10.0cm. (I) What is the spring constant of the spring? (II) If the is pulled down by 5.00cm and released, what is the frequency of the ...
*August 3, 2011*

**Latin American History**

That is correct Government by "a few people" is called Oligarchy.
*August 3, 2011*

**Math**

In how many ways can 8 instructors be assigned to five sections of a course in mathematics?
*July 31, 2011*

**math**

A card is selected from a deck of 52 playing cards. Find the probability of selecting · a prime number under 10 given the card is a heart. (1 is not prime.) · a diamond or heart given the card is red. · a King, given that the card is not a spade. Show step...
*July 31, 2011*

**science**

how does social and cultural influences influence science education
*July 27, 2011*

**chemistry**

nonane has a density of 0.79 g/mL and boils at 151 celsius. will it float or sink in water (density of 1.00 g/mL)
*July 27, 2011*

**Math**

If the odds of winning a raffle are 12:258, what is the probability of winning? 12/270 12/258 258/270 258/12
*July 23, 2011*

**math**

Given p is true, q is false, and r is trus, find the truth value of the statement (~p^q)<->~r. Show step by step work.
*July 17, 2011*

**Truth tables**

How do I construct a truth table for (p v q)->~p
*July 16, 2011*

**economics**

company A plans to purchase a packaging machine worth 5 million to further fast and up the packaging of their product brand X. the purchase is intended to boost up the loosing sale of the said product which makes 10000 per year. the target of the company is to increase the ...
*July 8, 2011*

**algebra**

a ramp rises 2.3 ft vertically and 14.8 ft horizontally express the slope
*July 8, 2011*

**Earlychildhood education**

play interaction stratiges for Artist Apprentice,Peacemaker,Guardian of the gate,Parallel plsyer,spectator,Participant,matchmaker,Storyplayer,and play tutor.
*June 24, 2011*

**maths**

im writting a math examination tomorrow and i dont know anything im learning my heart out help!4xy-5+5x-4y
*June 20, 2011*

**Physics**

In one cycle a heat engine absorbs 450 J from a high-temperature reservoir and expels 290 J to a low-temperature reservoir. If the efficiency of this engine is 57% of the efficiency of a Carnot engine, what is the ratio of the low temperature to the high temperature in the ...
*June 19, 2011*

**Math**

rationalize the denominator 12 over 5 pie 90
*June 17, 2011*

**Math**

How do I graph .4x + y = 325,000
*June 16, 2011*

**ecology**

If you were trying to decide if an unknown organism is an archaebacterium or an eubactrium, you woul look at the ribosomes because?
*May 26, 2011*

**English**

Write the phonic concept which identifies the common sounds found in each group of words below. Do not identify each sound separately, merely indicate the single phonic concept presented in each closed sort. Consonants __________ 1. black, snake, small, test, steam __________ ...
*May 24, 2011*

**Algebra 1a**

What the answer for this? 3 more than the quotient of a number and 2
*May 18, 2011*

**Algebra 1a**

What the answer for this? 3 more than the quotient of a number and 2
*May 18, 2011*

**math help please !!!**

i really neeed help, i have no idea how to answer this question ! i tried everything i know! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is ...
*May 17, 2011*

**math**

really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height ...
*May 16, 2011*

**math**

really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height ...
*May 16, 2011*

**Math**

Given the following sets, select the statement below that is true A = {r,i,s,k,e,d}, B={r,i,s,e},C={s.i,
*May 16, 2011*

**math**

a farmer is building a fence around his yard. one side of the fence will be the side of his barn , the other three sides will be made of wood. He has enough materials for 120m of fence, what is the maximum area he can enclose ? what are the dimensions which give this area
*May 15, 2011*

**math**

i really need help, i have no idea how to answer this question ! A stone is thrown off a cliff. it reaches a maximum height of 30m after 2 seconds, then falls into the water below. it hits the water after 5 seconds a) how high above the water is the cliff ( The maximum height ...
*May 15, 2011*

**math**

a farmer is building a fence around his yard. one side of the fence will be the side of his barn , the other three sides will be made of wood. He has enough materials for 120m of fence, what is the maximum area he can enclose ? what are the dimensions which give this area
*May 14, 2011*

**Socials Studies**

In 1837, were the rebels justified in taking up arms against the official government?
*May 13, 2011*

**math**

Please complete each equation 1. 15k = (9 - _____)k 2. 3.6p - p = _____ - 0.4p 3. (8 + _____) * = 5m
*May 11, 2011*

**Calculus 3**

Find the average value of the squared distance between the origin and points in the solid paraboloid D={ (x,y,z): 0 ≤ z ≤ 4 - x^2 - y^2} I have no idea how to start this.
*May 6, 2011*

**psychology**

Thanks so much!!!! For being 100 % correct
*May 4, 2011*

**com155**

thank you. did i miss any adjectives?
*May 2, 2011*

**com155**

I recently decided to apply for a credit card. I have absolutly no credit. When I received my new credit card I was extremely excited. I thought I was going to be responsible with my new credit card but I was not. The first thing I did was go to the mall. Just two hours after ...
*May 2, 2011*

**Chemistry**

How many grams of copper are produced when excess aluminum reacts with 11.6g of copper oxide?
*April 26, 2011*

**Spanish**

Question answers: 15. A 16. D 18. D 19. B 21. B
*April 26, 2011*

**bowie**

answer to 5(2x-3) 8=9 in a fraction
*April 25, 2011*

**Statistics**

Outliers are often easy to spot in histograms...my question is can a historgram have more than one outlier.
*April 19, 2011*

**English**

thank u guys
*April 19, 2011*

**English**

Which of the following should NOT be capitalized? A. Europe B. the Earth C. Far East D. the South Atlantic I think it's B?
*April 19, 2011*

**english**

thank u
*April 19, 2011*

**english**

1. An analogy helps clarify a complex idea by: A. presenting several definitions of the idea. B. comparing the idea with a simpler one C. breaking down the idea into smaller pieces D. pointing our a single common trait between two topics. I think it's B? 2. Which of the ...
*April 19, 2011*

**English**

thank u
*April 19, 2011*

**English**

Your conclusions are faulty in a cause-and-effect essay if: A. you include secondary effects B. you include only short-term effects C. you distinguish between long-term effects and short-term effects D. you include primary effects I believe it's B?
*April 19, 2011*

**geometry**

A polygon has d diagonals. If the polygon had one more side, it would d + 10 diagonals. How many sides does the polygon have?
*April 13, 2011*

**Math**

How much surface area would 1 fluid oz. of gold cover? Thickness .0002 (two Tenths)
*April 12, 2011*

**Spanish 8th grade-Please check answer**

Thank you
*April 12, 2011*

**Spanish 8th grade-Please check answer**

Is this correct the way I answered this-I don't like onion cake so I'm telling them Sorry,but I don't like it. ¿Quieres comer pastel de cebollas conmigo? Lo siento pero no, no me gusta pastel de cebollas. Thank you
*April 12, 2011*

**Spanish 8-Please check**

Thank you
*April 11, 2011*

**Spanish 8-Please check**

1.Which one is correct? Tocamos el piano. Jugamos el piano. Tocamos al piano. I think it is the Tocamos el piano because if it was jugamos then it would have to have "al" in front of piano. Piano is masculine so it couldn't be Tocamos al piano. 2. Which is ...
*April 11, 2011*

**Spanish -8th grade- Please check**

Which of the following is correct? Mis hermanos tocan a la guitarra. Mis hermanos tocan la guitarra. Mis hermanos juegan la guitarra. I think it is "Mis hermanos tocan la guitarra."
*April 11, 2011*

**Physics-Please check**

We're just learning this and I think I mixed up G=6.673E-11 from another problem and what my brother was telling me to simply do mass of electron * 9.8N/kg. I was accidentally combining two differnet things and not doing it correctly sorry for not understanding it right ...
*April 10, 2011*

**Physics-Please check**

I'm trying to find the gravitational force of an electron at earth's surface. I know I say Fg = mass electron * gravity Gravity in this case is 6.673*10-11 m^2/kg^2 correct, not 8.93 * 10^-30N that we used for force of acceleration, right. I use the universal constant ...
*April 10, 2011*

**Statistics**

What score in a distribution that has a mean of 500 and a standard deviation of 100, would identify the top 60% of scores?
*April 9, 2011*

**math**

If there are only two cards left it would be a 50% chance of picking the Queen of Hearts.....
*April 8, 2011*

**calculus**

f(x)= x^3/(2x-5)^4
*April 6, 2011*

**calculus**

find the derivatives F(x)=8ln(x^5-2x)
*April 6, 2011*

**math**

The table shows the amount of marbles brandon has in each bag. Brandon's Marbles bag) 1,2,3,4,5,6 marbles)12,11,12,20,21,20. What is the range?
*April 3, 2011*

**Physics**

A square steel plate is 9.00 cm on a side and 0.600 cm thick. Assume that the plate is oriented with the square faces horizontal to the ground. A. Find the shear strain that results if a force of magnitude 1.00×106 N is applied to the top square face of the plate, ...
*March 31, 2011*

**grade 7 math**

how can you figure out the length of a shadow if you walk closer to a lamppost?
*March 30, 2011*

**Interest Rates**

Homer won a prize in the lottery of $1000, payable $500 immediately and $500 plus 4% simple interest payable in 250 days. Getting impatient, Homer sells the promissory note to Moe for $450 cash after 130 days. Using a nominal 360 day year, find the simple interest rate, ...
*March 28, 2011*

**calculus**

find the derivative of F(x)=x^2-4/1+lnx
*March 28, 2011*

**calculus**

find the derivative of s(t)=(1+e^t)ln t
*March 28, 2011*

**Math(Probability)**

**Describe the outcome space** (a)If a Families that have three children each and select one such family at random. Describe the sample space S in terms of their children as 3-tuple, agreeing for example that "gbb" would indicate that the youngest is a girl and two ...
*March 16, 2011*

**Chemistry**

A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.
*March 8, 2011*

**Chemistry**

A 30 mL sample of 0.150 M KOH is titrated with 0.125 M HClO4 solution. Calculate the pH after the following volumes of acid have been added: 30 mL, 35 mL, 36 mL, 37 mL, and 40 mL.
*March 8, 2011*

**math**

In math class, students must randomly draw a card that contains an equation that they must graph on the board. If the cards contain the equations 2y = 4x + 2, x(x + 1) = 0, 2x + y = 0, x = 2y , x2 + 1 = 0, and y - 2x = 0, then what is the probability that a student will graph ...
*March 8, 2011*

**Math**

What is the shape of the schoolyard if four sides measure 40feet each and the fifth side measures 50 feet?
*March 6, 2011*

**Math- Linear Programming**

A dog food is to be mixed from three kinds of ingredients: rolled oats, beef parts, and whey. The cost of each is 20 cents, 40 cents, and 35 cents per lb. Each ingredient contains 50, 450, and 200 units of protein and 350, 65, and 100 units of carbohydrate respectively. The ...
*March 6, 2011*

**calculus**

a company maufacturing surfboards has fixed costs of $300 per day and total costs of $5100 per day for a daily output of 20 boards. Assume the total cost per day C(x) is linearly related to the total output per day x. write an equation for the cost function, and write an ...
*March 3, 2011*

**calculus**

solve x^6<16x^4
*March 3, 2011*

**math**

how do u figure that out
*March 2, 2011*

**math**

thanks k so what about this... thirty percent of what number is 120?
*March 2, 2011*

**math**

so if u had 4% of 56 it would be o.o4 *56=the answer
*March 2, 2011*

**math**

thanks so u move the decimal two to the left on the first #
*March 2, 2011*

**math**

how do u figure out what 18% of 34 is?
*March 2, 2011*

**math**

Perform the indicated operation and, if possible simplify. 7/12+(-3/5)
*March 1, 2011*

**Physics**

The force on an object is described as a function of time equation: F(t) = 3t^2+7t What is the impulse delievered by the force over a period of time from 0 to 5.0s? What is the average force exerted on an object over this time period? If the object has a mass of 2.0kg and is ...
*March 1, 2011*

**English**

I am trying to analyze Wendi Kaufman's "Helen on Eighty-Sixth Street." I do not understand what Vita's mother means when she says "Truth is beauty and beauty is truth..." Please explain the meaning of this quote.
*February 27, 2011*

**social studies**

were the british justified using that amount of force against the french in 1837? use examples from 2011 to help explain your awnser
*February 27, 2011*

**Math**

Consider a polygon ABCDE with coordinates A(0,4), B(3,0), C(7,2) , D(11,6) and E(8,15) Choose all possible pairs from below at which a maximum over the region can be attained by a non constant linear function. [(0,4),(7,2)] [(0,4),(8,15)] [(7,2),(11,6)] [(11,6),(8,15)] [(0,4...
*February 26, 2011*

**12th grade English**

do the bib and note cards for elizabeth barret browning and robert browning
*February 24, 2011*

**physics**

A 214 kg boat is sinking in the ocean. The boat's weight is partially offset by the 790 N buoyant force of the water. What is the net acceleration of the boat?
*February 24, 2011*

**mangement science the art of modeling w/ spreadshe**

Five years ago, an automobile manufacturer started offering an extended warranty to buyers of its sport-utility vehicle.Â Â The extended warranty covered defects occurring after the initial three-year warranty expired.Â Â Of the 10,...
*February 20, 2011*

**business**

discuss the ways in which a business might respond to growing awarness of environmental issues among its customers?
*February 19, 2011*

**introduction to business**

retailing has undergone a major change in technology in the past few years with the introduction of internet trading. many customers now order their goods online. discuss the benifits and drawbacks for retailers in this growing line of business?
*February 19, 2011*

**spanish**

do any of these words have accents? (if so please identify them): - abrigo - rapido - sabado - vez - menu - operacion - impermeable - ademas - regatear - antipatico - farmacia - esqui - pension - pais - perdon
*February 17, 2011*

**math**

using only whole numbers, how to can i draw 3 rectangles with perimeter of 12 units
*February 16, 2011*

**chemistry**

a sample of gas has a volume of 12liters at 0 degrees celcius and 380 torr. what will be its volume whent the pressure is changed to 760 torr at a constant temperature?
*February 10, 2011*

**Chemistry**

do I use the Ksp of MfF2 and plug it in the equation?
*February 8, 2011*

**Chemistry**

Calculate the molar solubility of MgF2 in 0.08M MgCl2 at 25 degrees C.
*February 8, 2011*