Sunday

March 1, 2015

March 1, 2015

Total # Posts: 1,162

**physics**

A 78.0 kg person is being pulled away from a burning building as shown in Figure 4.27. Calculate the tension in the first rope, T1, if the person is momentarily motionless.
*February 12, 2014*

**physics**

Two teams of nine members each engage in a tug of war. The first team's members have average masses of 64 kg and exert average forces of 1350 N horizontally. The second team's members have average masses of 69 kg and exert average forces of 1371 N horizontally. (a) ...
*February 12, 2014*

**Science**

Posted by Marie on Thursday, January 30, 2014 at 6:10pm. Which of the following shows the correct order from coldest to hottest average annual temperature? a. Taiga-Tundra-Rainforest-Temperate forest b. Rainforest-Temperate forest-Taiga-Tundra c. Temperate forest-Taiga-Tundra-...
*January 30, 2014*

**Why was my ? deleted**

I guess it is a bit annoying to me when I see people post like an entire exam and ask for answers. I'm also doing this course, and I get the need for help, but I am here studying, trying really hard to read and find the answers myself, while some people have the nerve to ...
*January 8, 2014*

**math**

Ellen works for a high-speed rail company that wants to develop a new rail line. Ellen’s project is to find a train that is the second fastest in the world. The Shinkansen Bullet Train in Japan is reported to go as fast as 320 kilometers per hour. The TGV train in France ...
*January 2, 2014*

**Environmental Science**

A nuclear burning power plant produces a total power of 1.1kW. It serves a community that requires 2.85 x 107 kJ of power over the entire year. How many days per year does the power plant need to operate to provide all this power? 300 days 250 days 365 days 200 days 150 days
*December 22, 2013*

**Science**

Which of the following ets of terms could be used in a deseription of the peripheral nervous system?
*December 12, 2013*

**science**

I need the definition of an observation that use color, shape, texture, smell, taste
*December 9, 2013*

**Social studies**

Which of the following be explains why a species of lizards is able to live in the desert but not in a tundra regions?
*November 6, 2013*

**Science**

For lunch, Jane Doe consumed the following: a turkey sandwich on whole wheat bread with mayonnaise, lettuce, and tomato; potato chips; and apple juice. 1.Trace the path of digestion through Jane from beginning to end. Include the nutrients the food contained and are broken ...
*October 27, 2013*

**algebra**

Sophie bought a total of 27 guppies and angel fish. She bought twice as many guppies as angel fish. How many of each kind of fish did Sophie purchase?
*October 24, 2013*

**Applied Physics**

When a 3600 lb automobile runs out of gas, it is pushed by its unhappy driver and a friend a quarter of a mile (0.250 mi). To keep the car rolling, they must exert a constant force of 175 lb. (a.) How much work do they do? (b.) If it takes them 15 minutes, how much power do ...
*October 22, 2013*

**algebra 1**

The length of the base of a isosceles triangle is one forth the length of one of its legs. If the premimeter of the triangle is 16 inches, what is the length of the base.
*October 9, 2013*

**ALGEBRA 1**

You practice playing your guitar every day. You spend 15 minutes practicing chords and the rest of the time practicing a new song. So the total number of minutes y you practice for the week is given by y=7(15+x), where x is the number of minutes you spend on practicing a new ...
*October 7, 2013*

**Algebra 1**

Tall Buildings You made a model of the Space Needle in Seattle, Washington, for a report on architecture in the United States. You used a scale of 1 in.:50 ft. Your model is 12.1 inches tall. Estimate the actual height of the Space Needle. Is it 605
*October 5, 2013*

**Algebra 1**

A music downloading website reports that nearly 5 out of every 7 songs downloaded are classiﬁed as pop music. According to this information, predict how many of the next 500 songs downloaded will be pop songs. Round your answer to the nearest whole number. Is the answer...
*October 3, 2013*

**math 5th grade**

What is 59,424.77 rounded to the nearest square mile
*September 17, 2013*

**Sociology**

D) children raised in isolation
*September 17, 2013*

**Chemistry**

In a reaction between pure acetic acid and sodium bicarbonate, 14.7 grams of sodium bicarbonate was added to 21.0 mL of acetic acid. Which reactant is the limiting reactant in this reaction? Name of limiting reactant (acetic acid or sodium bicarbonate): How many moles of the ...
*September 13, 2013*

**French**

The question is: Remplace par un pronom: Est-ce qu'ils prendront beaucoup de temps? No part of the sentence is highlighted or bolded, and I honestly have no idea where to even start. Any help would be greatly appreciated. Thank you!
*August 25, 2013*

**science**

The pilot of an airplane traveling 180km/h wants to drop supplies to flood victims isolated on a patch of land 160m below. The supplies should be dropped how many seconds before the plane is directly overhead?
*August 22, 2013*

**math**

gbjgv
*August 12, 2013*

**math**

what is the answer to 7 8/15-2 2/6
*August 8, 2013*

**com**

A word's denotation is its ________
*July 12, 2013*

**Chemistry**

Which of the following statements is incorrect concerning the thermochemical equation below? 2SO3(g) 2SO2(g) + O2(g); H° = 198 kJ a. The enthalpy of the reactants exceeds that of the products. b. The reaction is endothermic. c. For the reaction 2SO2(g) + ...
*July 2, 2013*

**Chemistry**

H2 and F2 react according to the following equation, forming HF. H2(g) + F2(g) 2HF(g); H° = –271 kJ If H2(g) and F2(g) were mixed in a thermally insulated vessel, the reaction that occurred would be a. endothermic, and the temperature of the reaction ...
*July 2, 2013*

**Chemistry**

Bulb A is 100mL and contains Helium at 1atm. Bulb B is 500ml and contains Argon at 2atm The bulbs are connected together by a valve. (assume constant tempreature). What is the mole fraction of Argon in the opened system?
*July 2, 2013*

**Chemistry**

Would the total pressure be 2.19985 atm? Could you possibly help me with this one?
*July 2, 2013*

**Chemistry**

Bulb A is 100mL and contains Helium at 1atm. Bulb B is 500ml and contains Argon at 2atm The bulbs are connected together by a valve. (assume constant temperature). What is the total pressure of the system after the valves are opened?
*July 2, 2013*

**physics**

What is the electric field intensity produced by a charge at 10 meters, where the electric potential is 1.44 volts?
*June 17, 2013*

**Physics**

A disk in your computer spins at 5400 rpm. If this disk turns through 12 revolutions before coming to stop, find the disks angular velocity acceleration. Also find the time it takes to stop.
*June 12, 2013*

**physics**

How will changing charge change the equipotential at a distance of 2 meters? I honestly just don't even know where to start with this. If someone could at least point me in the right direction, that would be great!
*June 12, 2013*

**trig**

quadrant 1
*June 12, 2013*

**Science**

How do i calculate this? 5 ml of 0.1% (w/v) AgNO3 2 L of 1% (w/v) NaCl
*June 9, 2013*

**math**

Vance wants to fence in a rectangular area for his dog. He wants the length of the rectangle to be at least 30 feet and the perimeter to be no more than 150 feet.
*May 6, 2013*

**Math**

Tony wants to plant at least 40 acres of corn and at least 50 acres of soybeans. He wants no more than 200 acres of corn and soybeans. Show and describe all the possible combination's of the number of acres of corn and of soybeans Tony could plant. List two possible ...
*May 6, 2013*

**Math**

Linda works at a pharmacy for $15 an hour. She also babysits for $10 an hour. Linda needs to earn at least $90 per week, but she does not want to work more than 20 hours per week. Show and describe the number of hours Linda could work at each job to meet her goals. List two ...
*May 6, 2013*

**stats**

The percent of fat calories that a person that in America consumes each day is normallydistributed with a mean of 36 and a standard deviation of 10. Suppose that 16 individuals are randomly chosen for an experiment. 1. Completely describe the distribution of sample means for ...
*April 28, 2013*

**Stats**

1. If you were to receive $3 for every time a 7 or 11 was rolled with two fair dice and lost $1 for all the ther values, what is the expected value (mean) for you as a gambler in this experiment? (please show work so I know how to do it). 2. Going with the question above, ...
*April 28, 2013*

**Right angle trigonometry**

A sailor sights both the bottom and top of a lighthouse that is 20 and m high and which stands on the edge of a cliff. The two angles of elevation are 3 and 42. To the nearest meter, how far is the boat from the cliff?
*April 25, 2013*

**6th grade Math**

i can't figure out this problem 12 and 1/2 as a percentage... i need help
*April 23, 2013*

**Math**

Roulette is a well known game in which a mechanical device randomly selects one of 38 equally likely numbers. IF a player decides to play by choosing a number, he gains $35 if his number is selected by the device. If any other number is selceted he loses $1. Calculate the ...
*April 21, 2013*

**Math**

if the last digit of a weight measurement is equally likely to be any of the digits 0 through to 9.what is the probability that the last digit is greater than or equal to 5 ?
*April 15, 2013*

**math ALG 2!**

The scientific notation 3.14 x 10 -3 has what value
*March 19, 2013*

**POLITICAL SCIENCE**

describe the European origins of American conservative and liberal ideologies. Then, explain how these two American ideologies have evolved from their European origins, and the key features of each American ideology today. Do “Tea Party” beliefs neatly fit in a ...
*March 18, 2013*

**AP Chemistry**

What mass in grams of sodium hydroxide is produced if 20.0 g of sodium metal reacts with excess water according to the chemical equation? 2Na(s)+2H20(l)=2NaOH(aq)+Hs(g) How many moles of Ag can be produced if 350. g of Cu are reacted with excess AgNO3 according to the ...
*March 18, 2013*

**Science**

How do you do a Leg table in science?
*March 11, 2013*

**5th grade math (word problems)**

1. This one is ok. 2. The coffe cups should be divided by 8. If you were to make a drink for the club you would certainly have a drink. The answer is 30/8= 3.75; then you would multiply 8 * 3= 24; then you would subtract 30-24 you you would have 6 cups left.
*March 9, 2013*

**Lang. Arts**

Ther is non. B. is an interrupter.
*March 9, 2013*

**Math**

Graph 4x2 + y2 = 9. What are its lines of symmetry?
*March 7, 2013*

**Psychology**

Nothing. Some kids will choose not to let Mom or dad read to them. Some may take the opportunity and run with it. Reading to them does give them a better chance, but not a garnented chance of being able to read faster. The point is if you just read it's a story, but if you...
*March 4, 2013*

**Physics**

A 200-pound boy lifts a 40-kilogram box off of the floor 1.3 meters in 0.7 seconds. His brother lifts a 48-kilogram box off the floor 0.9 meters in 0.6 seconds. Which boy is more powerful? Explain.
*March 4, 2013*

**science**

a river does 6500J of work on a water wheel every second.The wheels efficiency is 12 percent.A)How much work in joules can the axle of the wheel do in a second? B)What is the power output of the wheel?
*March 3, 2013*

**fractions**

Adam can make the common denominator 12 because 6 and 3 go into it evenly. Then do 1/6x2=2/12 then you do 1/3x4=4/12!!!
*February 26, 2013*

**physics**

oh no sorry nevermind it would be 2:1.. got it. Thanks man
*February 11, 2013*

**physics**

so is it a 1:2 ratio then? I have the options of 1:2 , 2:1, 1:3, and 3:1 on my homework. thanks for answering
*February 11, 2013*

**physics**

A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed of the electron. What is the ratio of the force experienced by the proton to the electron?
*February 11, 2013*

**physics**

Can someone please explain to me why or how this statement is true? I don't understand it.. Two events that are simultaneous in one inertial frame of reference will not necessarily be simultaneous in any other inertial frame of reference. Thank you
*February 11, 2013*

**physics**

ultra violet light
*February 11, 2013*

**Statistics**

If the probability of a newborn child being female is 0.5, find the probability that in 100 births, 55 or more will be female. Use the normal distribution to approximate the binomial distribution.
*February 10, 2013*

**west chester university **

A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 8.26 s. What is its initial velocity? Neglect air resistance.
*February 9, 2013*

**math**

Carlos will use square floor tile that measure one foot on each side to cover a hallway that is eight feet long and four feet wide.how many floor tile will carlos need
*February 4, 2013*

**Science**

In lab the other day we did an acid/base extraction to separate mixtures. The top layer of the mixture is the organic layer, which consists of diethyl ether and fluorine. The bottom layer is considered to be the aqueous layer, which consists of water and benzoate anion. The ...
*February 4, 2013*

**physics**

Bert is standing on a ladder picking apples in his father's orchard. As he pulls each apple off the tree, he tosses it into a basket that sits on the ground 2.5 m below at a horizontal distance of 1.9 m from Bert. How fast must Bert throw the apples (horizontally) in order...
*February 4, 2013*

**geometry**

The price is$23
*January 30, 2013*

**algebra**

CA? me too :) b careful what u post and make sure u dont put ur name bc getting caught will lead to an automatic 0 on the quiz
*January 23, 2013*

**math**

Write a sequence of transformations that maps triangle ABC onto triangle A''B''C''. --------------------------------------… A in ABC is 1,9, B in ABC is 3,12, and C in ABC is 4,4. A'' in A''B''C'' is 3,-3, B''...
*January 23, 2013*

**Chemistry**

Adding 1.530x10^3 J of electrical energy to a constant-pressure calorimeter changes the water temperature from 20.50C to 21.85C. When 1.75g of a solid salt is dissolved in the water, the temperature falls from 21.85C to 21.44C. Find the value of qp for the solution process.
*January 22, 2013*

**Physics **

A hotair balloonist, rising vertically with a constant speed of 5.00 m/s, releases a sadndbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. a. compute the position and velocity of the sandbag at ....
*January 22, 2013*

**Physics **

A hotair balloonist, rising vertically with a constant speed of 5.00 m/s, releases a sadndbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. a. compute the position and velocity of the sandbag at ....
*January 22, 2013*

**Physics**

Okay. Thank you for your help
*January 21, 2013*

**Physics**

During 200 meter and 400 meter races, runners must stay in lanes as they go around a curved part of the track. If runners in two different lanes have exactly the same speed, will they also have exactly the same centripetal acceleration as they go around a curve? Explain.
*January 21, 2013*

**Chemistry**

How many types of stoichiometry are there? Can you list them? Thanks I appreciate it!
*January 14, 2013*

**Chemistry**

A sample of gas occupies 24.5 L at a pressure of 1.57 atm; what is the pressure if the volume is increased to 48.3 L?
*January 9, 2013*

**QUESTION**

can you please describe the chinese new year? and how its celebrated?
*January 6, 2013*

**living enviornment**

What structure is involved in carrying out each of the following life activities in the paramecium: A.INGESTION- B.DIGESTION- C.TRANSPORT- D.EXCRETION- E.WATER BALANCE- F.LOCOMOTION- G.REPRODUCTION- PLEASE HELP ME OUT
*January 2, 2013*

**Pre algebra**

5.4=y-1.5.+2.3
*January 2, 2013*

**Math...Please Help!**

Triangle ABC has coordinates A(1, 4); B(3, –2); and C(4, 2). Find the coordinates of the image A'B'C' after a reflection over the x-axis.
*December 21, 2012*

**Biology**

I need to answer the question Describe a series of small habitats that exist within 10 to 20 kilometers of your house and which might be subject to MacArthur and Wilson's theory of island biogeography. How do I know what small habitats exist around my house? I live with in...
*December 11, 2012*

**Physics**

A pendulum with a length of 2.0 m has a period of 2.8 sec. What is the period of a pendulum with a length of 8.0 m?
*December 7, 2012*

**ECE**

It is A. If you do not establish a plan of discipline then you job is pointless.
*December 7, 2012*

**calculus**

thank you!
*December 6, 2012*

**calculus**

Use left endpoints and 9 rectangles to find the approximation of the area of the region between the graph of the function cos2x and the x-axis over the interval [0, pi/2] . Round your answer to four decimal places.
*December 6, 2012*

**algebra**

a large group of students want to go to the movies. if the students take 3 vans and 1 car they can transport 22 people. if they take 2 vans and 4 cars. they can transport 28 people.write and solve a system of equations to find the number of people that can be transported in a ...
*December 4, 2012*

**Algebra**

domain is 4
*December 4, 2012*

**Physics**

A 155 N force is applied to the end of a 40 cm wrench at a angle of 45 degrees to the handle. What is the torque?
*December 4, 2012*

**Math**

-6(7x-1)<-8x+9(3x-4)
*November 26, 2012*

**Business Short Essay**

Thank you so much!
*November 24, 2012*

**Business Short Essay**

How should I start of a one page written assignment on the marketing failure of a company? What should the first paragraph include?
*November 24, 2012*

**Business / Marketing**

Thank you so much! Does RIM count as a market failure? Like.. its close to one I think.
*November 23, 2012*

**Business / Marketing**

What corporation/company recently had a market failure in 2012.. at least from September to now? I need one for my assignment, but can't think of find any.
*November 23, 2012*

**Math**

The depreciation rate, r, for a $50,000 news car is given by the function r = 1 - (V/50,000)^(1/5), where V is the value of the car when it is five years old. a) What is the depreciation rate for a $50,000 BMW that is worth $28,000 after 5 years? (I already found the answer to...
*November 22, 2012*

**math- unit rate**

what is the unit rate for 18:1.25
*November 15, 2012*

**health**

i think its a?
*November 9, 2012*

**health**

What is stress management? A. Controlling and reducing the tension that occurs in stressful situations B. Controlling and reducing the tension that occurs in peaceful situations C. Controlling and reducing the happiness that occurs in peaceful situations D. Controlling and ...
*November 9, 2012*

**health**

Question 11 of 20 5.0 Points Regular physical activity appears to reduce symptoms of ________ for children and adolescents. A. Anxiety and depression B. Low self-esteem C. Identity or role confusion D. All of the above i think it is b?
*November 8, 2012*

**Physics**

For a single movable pulley with a mechanical advantage of 2, how much rope must be pulled to lift a 150 neuton load 2 meters above the ground?
*November 7, 2012*

**physics**

a jet plane traveling at +87 m/s lands on a runway and comes to rest in 11 s. a)Calculate its uniform acceleration b)Calculate the distance it travels
*November 6, 2012*

**math**

1 5/8
*November 6, 2012*

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