Thursday

October 23, 2014

October 23, 2014

Total # Posts: 1,120

**chemistry**

How many milliliters of a 0.200 M HI solution are needed to reduce 21.5 mL of a 0.365 M KMnO4 solution according to the following equation: 10HI+2KMnO4+3H2SO4 ---> 5I2+ 2MnSO4 +K2SO4+ 8H2O
*October 18, 2014*

**Chemistry 101**

Based on the masses of CaCl2 and Na3PO4 you determine from the periodic table,what mass combining ratio would you predict?
*October 17, 2014*

**us history**

what best summarizes the population decline of native americans.
*October 17, 2014*

**Math**

what is 603kg = ? g. I don't get how to do the problem
*October 14, 2014*

**Art Need help Please**

i need help too
*October 13, 2014*

**Chem Help Please!**

In most cases with GLC the area under the peak as a % of the total area for all peaks is interpreted as representing the % mass of the compound measured in the mixture. Explain why this is only an approximation.
*October 5, 2014*

**English**

In the myth "When Grizzlies Walked Up Right" explain how the bears lived in relation to each other before and after the introduction of the female into their clan. Please help me
*September 28, 2014*

**Chemistry**

Four isotopes of Lead occur naturally: 204Pb (mass = 203.973037 amu) 206Pb (mass = 205.974455 amu) 207Pb (mass = 206.975885 amu) 208Pb (mass = 207.976641 amu) If the percent abundance of 204Pb and 208Pb are 1.400 and 52.40, respectively, what is the percent abundance of 206Pb...
*September 24, 2014*

**math**

A certain pencil comes 4 in a package for $.75. Find the cost of 24 pencils.
*September 24, 2014*

**algebra**

Jesse and Larry entered a pie eating contest. Jesse ate 5 less than twice as many pies as Larry. They ate a total of 16 pies. How many pies did each eat.
*September 24, 2014*

**Algerbra**

Human body temperatures are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F if 19 people are randomly selected find the probability that they're mean by temperature will be less than 98.50 degrees Fahrenheit
*September 16, 2014*

**Physics Help**

Divers for many years have dived into the ocean from the cliffs of Acapulco, a distance of 35 m above the water. How fast are the divers moving when they hit the water? If the divers travel a distance of 5 m through the water before momentarily coming to rest, what ...
*September 11, 2014*

**Physics Help**

Freshly picked cucumbers are dropped into a bin from a height of 1.25 m above the bottom of the bin. Assuming that the bin is empty, how fast is a cucumber going when it hits the bottom of the bin? How much time does it take the cucumber to fall to the bottom of the bin? Thanks!
*September 11, 2014*

**Physics Help**

the question is like this! It doesnt have any units.
*September 11, 2014*

**Physics Help**

1) two cars start at the same location and accelerate for the same amount of time. if one car has twice the acceleration of the other, how will the final speeds of the cars compare? by how much farther will the faster car outdistance the slower car?
*September 11, 2014*

**math **

the ratio relationship betweeen 19:7 and 7 to 26
*September 11, 2014*

**Physics Help Please**

1) two cars start at the same location and accelerate for the same amount of time. if one car has twice the acceleration of the other, how will the final speeds of the cars compare? by how much farther will the faster car outdistance the slower car?
*September 11, 2014*

**Chm Help Please!!!**

you wish to purify by distillation a material that has a boiling point of 205 C and reacts with air but this material will decompose if heated above 150 C. How would you set up the system to distill this material? Thanks!
*September 9, 2014*

**physics**

A bush baby, an African primate, is capable of leaping vertically to the remarkable height of 2.3 m. To jump this high, the bush baby accelerates over a distance of 0.18m while extending the legs. The acceleration during the jump is approximately constant. What is the ...
*September 9, 2014*

**Chemisty 132**

How much energy (in kilojoules) is needed to heat 5.55g of ice from -13.5 ∘ C to 26.5 ∘ C. The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K⋅mol) for ice and 75.3 J/(K⋅mol) for liquid water.
*September 7, 2014*

**Physics **

Two 0.75m -long pendulums hang side by side. The masses of the pendulum bobs are 65g and 85g . The lighter bob is pulled aside until its string is horizontal and is then released from rest. It swings down and collides elastically with the other bob at the bottom of its arc.To ...
*September 7, 2014*

**Chemisty 132**

How much energy (in kilojoules) is needed to heat 5.55g of ice from -13.5 ∘ C to 26.5 ∘ C. The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K⋅mol) for ice and 75.3 J/(K⋅mol) for liquid water.
*September 7, 2014*

**Chemistry **

a solution of OH- ions is added to a beaker of pure water at 25 C, to a final concentration of 872 nM. Calculate the pH of the solution. I know that pH=-log[H+], but I'm still really confused as to how to convert the nM to M and how to solve this problem.
*September 5, 2014*

**history**

i have to have a 500 word essay i have 300 i need some extra help What options did Native Americans have at their disposal? What means of resistance and accommodation did different Indian groups choose, and why do you think they made those choices? What was the possible range ...
*September 2, 2014*

**physics**

(a) What is the acceleration of gravity on the surface of the moon? m/s2 (b) What is the acceleration of gravity on the surface (or outer limit) of Uranus? The mass of Uranus is 8.68 ✕ 1025 kg and its radius is 2.33 ✕ 107 m.
*July 21, 2014*

**us history**

The Quasi War was waged between the United States And?
*July 8, 2014*

**social studies**

It's says complete the sentence. When the suspect appears in court,her case will be judged by a group of her?
*July 6, 2014*

**algebra**

The scientific notation 3.14 x 10 -3 has what value
*July 2, 2014*

**math **

okay so I have to work out this problem for school work and I don't understand it. the problem is : if the perimeter of an isosceles triangle is 2x + 10, what is the length of one of the congruent sides ? PLEASE HELP ME !
*June 18, 2014*

**algebra**

Which choice does not equal the others? How do I figure this out? A. 4% of 3,000 B. 40% of 30 C. 40% of 300 D. 30% of 400
*June 3, 2014*

**algebra math**

A deck has 12 cards numbered 1 to 12. Ashley needs a number greater than 9 to win a game. If she selects a card at random, what is the probability that she will win?
*June 3, 2014*

**math**

A) which is the better value a 12 ounce jar of honey for $2.25 or an 18 ounce jar of honey for $3.24? B) the supermarket displays the unit price for the 12 ounce jar in terms of cost per ounce, but displays the unit price for the 18 ounce jar in terms of cost per quart. ...
*May 11, 2014*

**math**

A architect is designing a house. The scale on the plan is 1 inch=6 feet. If the house is to have a length of 90 feet and a width of 30 feet, how long will the line representing the house's length on the blue print
*May 11, 2014*

**Math**

don't know
*May 9, 2014*

**Math**

45
*May 2, 2014*

**Math **

A fish and game worker catches, tags, and releases 120 trout in a lake. Later, she catches 84 trout and finds tags on 30 of them. Estimate the number of trout in the lake. A.43 B.234 C.336 D.3600 Is it C?
*April 29, 2014*

**Science**

What contribution does the African elephant make to the world.
*April 27, 2014*

**Quantitative Methods**

1. Management of Sundown Rent-a-Car (see Problem 8-8) has decided that perhaps the cost during the six-month period is not the appropriate Cost to minimize because the agency may still be obligated to additional months on some leases after that time. For example, if Sundown ...
*April 24, 2014*

**Chemistry**

The chemical reaction for the generation of gas in an automobile safety air bag is 2NaN3(s)→ 2Na(s)+3N2(g) What volume of gas is produced if there are 130.0 grams of NaN3 used in the reaction? (The density of nitrogen gas is 0.916 g/L.) Please show your work.
*March 31, 2014*

**Chemistry**

The chemical reaction of 100 g of salicylic acid, C7H6O3, with excess acetic anhydride produces 50.0 g of aspirin, C9H8O4, according to the equation. What is the percentage yield for the reaction shown below? Please show your work. C7H6O3+C4H6O3→C9H8O4+C2H4O2
*March 31, 2014*

**algebra**

Jeremy had 36 community concert tickets to sell. He sold 2 and 3 and a third of the tickets did jeremy sell
*March 29, 2014*

**Calculus**

The vertical position of an object is modeled by the function h(t)=-16t^2 +5t+7, where h is measured in feet and t is measured in seconds. Find the object's initial velocity (that is, the velocity at t=0). Is it 5 feet per second?
*March 26, 2014*

**English Literature**

comparing the way he feels to being sharper than a serpent's tooth?
*March 18, 2014*

**English Literature**

"sharper than a serpent's…" repeats the 's' sound?
*March 18, 2014*

**English Literature**

Or maybe imagery?
*March 18, 2014*

**English Literature**

I have a feeling it's either metaphor or alliteration, but I'm not sure.
*March 18, 2014*

**English Literature**

To laughter and contempt; that she may feel How sharper than a serpent's tooth it is To have a thankless child! Away, away! The dominant figure of speech in this passage is: A) alliteration B) assonance C) simile D) metaphor E) imagery
*March 18, 2014*

**social studies(updated answers)---Mrs.Sue**

6.C 6.How did European rule in South America change the people of the continent? A. European missionaries introduced religion. B. European colonists brought diseases that killed millions of natives. C. European conquistadors incited conflict on the continent. D. European ...
*March 17, 2014*

**social studies(updated answers)---Mrs.Sue**

1.A 2.C 3.A 6.D 9.B 1. why do most people live in the western part of colombia? A. to enjoy the cooler climate of the mountains B. to be closer to the border with venezuela C. to live along the pacific coast D. to benefit from the country's lush rain forests 2. what are ...
*March 17, 2014*

**social studies**

1.D 2.B 3.B 4.A 5.C 6.A 7.D 8.B 9.B 10.C 1. why do most people live in the western part of colombia? A. to enjoy the cooler climate of the mountains B. to be closer to the border with venezuela C. to live along the pacific coast D. to benefit from the country's lush rain ...
*March 17, 2014*

**Language Art help**

How does the great radio scare help you gain an understanding of past events? A.it tells why people are afraid of things they dont understand B.it tells of a radio broadcast that sounded so real people believed it was true C.it tells of an event that led to changes in what ...
*March 16, 2014*

**health(MS.SUE)**

1.D 2.A 3.D 4.B 5.C 6.C 7.B 8.A 9.D 10.D 11.B 12.A 1. Joey lifts a heavy backpack off the ground.as he lifts the backpack,he keeps his legs straight and uses his biceps and back muscles to lift.in your analysis of joeys's form,you conclude he needs to use his A. arm ...
*March 16, 2014*

**health**

1.D 2.A 3.D 4.B 5.C 6.C 7.B 8.A 9.D 10.D 11.B 12.A 1. Joey lifts a heavy backpack off the ground.as he lifts the backpack,he keeps his legs straight and uses his biceps and back muscles to lift.in your analysis of joeys's form,you conclude he needs to use his A. arm ...
*March 16, 2014*

**SocialS..**

Hello everyone i only have one question today that im curious about. Thanks Which industry provides the most benefits for the environment? A.Cattle ranching B.ecotourism C.tourism D.large-scale farming
*March 12, 2014*

**Environmental Science**

On Earth in the extreme northern and southern latitudes, how does the relationship between GPP and NPP change during an entire year’s time?
*March 6, 2014*

**History **

In January 1917, President Wilson outlined a "new world order" in which: a. freedom of the seas should be reevaluated as a vital American policy. b. the League of Nations should be replaced by the United Nations. c. self-determination would be the foundation of ...
*February 27, 2014*

**math**

Normally the variable will go on the right side of the number. Despite this fact, 6z and z6 are the same. For example if z= 2 ; then 6z=6(2)=12 or z6 =2(6)=12
*February 27, 2014*

**Statistics**

.0051
*February 25, 2014*

**Advanced Math**

In a game you flip a coin twice, and record the number of heads that occur. You get 10 points for 2 heads, zero points for 1 head, and 5 points for no heads. What is the expected value for the number of points you’ll win per turn?
*February 19, 2014*

**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*

Pages: **1** | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | Next>>