Thursday

April 24, 2014

April 24, 2014

Total # Posts: 119

**Physics**

A ball is thrown straight upward and rises to a maximum height of 20 m above its launch point. At what height above its launch point has the speed of the ball decreased to one-half of its initial value?

**chemistry **

190 grams of potassium iodide is placed in 100 cm3 at 60 degrees Celsius. the solution is cooled to 30 degrees Celsius. how many grams will settle out?

**MATH HELP**

Find the volume of the solid obtained by rotating the region underneath the graph of f(x) = (x)/sqrt(x^3+1) about the y-axis over the interval (1, 10)

**MATH**

Compute the volume of the solid obtained by rotating the region in the first quadrant encolsed by the graphs of the functions y = x^2 and y = sqrt(x) about the y-axis. I keep getting (1/3)pi and can't figure out what I'm doing wrong!

**Math**

How can I find 2 equations with infinitely many solutions? Thanks

**Math**

So for y= 4-2x will be 2y=8-2x?

**Math**

Thank you

**Math**

How can I find 2 equations with infinitely many solutions? Thanks

**Math-Calculus**

Please Help D:. Min/Max Problems 4. Joan has 50ft of interlocking stone available of fencing off a flower garden in the form of a circular sector. Find the radius of the circle that will yield a flower garden with the largest are if Joan uses all the stone.

**lindy**

how many different flags can be made? if there are 5 colors,but the flag must have 3 bands of color

**math**

a chairman and vice-chairman are to be elected from 7 candidates.how many different results are possible ?

**History**

To what extent was the French Revolution caused by new political ideas and influences?

**Biology**

Can you give me an order from 1 to 3 for the following materials, 1 being the best insulator and 3 being the poorest? styrofoam, plastic, aluminum

**Biology**

hi! so I have to make an experiment on heat loss & insulation and so, I did an experiment on which material insulates best against the wind of a fan--styrofoam, plastic or aluminum can. each has hot water in it but the styrofoam took the longest for the hot water to cool becau...

**Biology**

so how can I use one of those materials (or just keep the fan) to make an experiment that tests body temperature / insulation / etc?

**Biology**

hi! so for science we have to make an experiment on temperature. we have to base our experiment on the given materials (which include test tubes, aluminum foil, cotton, fan) i chose a fan and I'm thinking of doing an experiment on how the strength of wind affects body temp...

**chemistry**

0.450mol of Na2S in 1.50L of solution

**history**

doing an essay for english, i need help writing it. what were the diverse purposes of Englands american colonies and how were those purposes altered in the early years? i just need 3 purposes. if anyone can help i would appreciate it!!!! please!

**Maths**

Sorry I should have added that I was working it out as a derivitive

**Maths**

What steps were taken to get px-2x^2 to be p-4x?? I can't work out what happened to the 'x' after 'p'. I can see that 2x^2 equals 4x though. Any help would be much appreciated :) Thanks

**History**

Almost every one has several wives and especially the Sagamores, since they cannot maintain their power and keep up the number of their dependents. I need to find one more. What does this line mean? keep up the number of dependents unless they have not only many children to in...

**History**

Is there any "European bias or bias" in this article? To obtain the necessaries of life, they (he Indians of Arcadia) endure cold and hunger in an extraordianry manner. During eight or ten days, if the necessity is imposed on them, they will follow the chase in fasti...

**History**

Thank you!!

**History**

What was the non-importation movement? Is this right? What does no taxation without representation mean? We will only pay taxes that our representatives in a House or Assembly [or similar body] have approved and passed into a law

**physics**

(c) If the wave has amplitude 1.80 m when it speed is 200 m/s, what will be its amplitude where the water is 9.00 m deep?

**physics**

(c) If the wave has amplitude 1.80 m when it speed is 200 m/s, what will be its amplitude where the water is 9.00 m deep?

**Legal Studies**

Hey :) If a juvenile is held in remand does this mean that their being held in custody (a juvenile detention center etc) while their waiting trial (i.e. havent been sentenced yet)? I'm just having some trouble understanding the meaning of remand. Any help on this would be ...

**physics**

A 5.4 cm diameter horizontal pipe gradually narrows to 3.7 cm. When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 35.0 kPa and 21.0 kPa, respectively. What is the volume rate of flow?

**physics**

Calculate the force, required of the "deltoid" muscle to hold up the outstretched arm shown in the figure . The total mass of the arm is 2.9 kg.

**chemistry**

Need to do a lab of finding the density of the Molarity of 1M NaCl without having any equipments..How best to do so..A procedure would be appreciated

**Chemistry**

How to determine the energy in J calories and K to convert one pound of ice to steam

**physics**

A teenager pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 12 in 9.0 . Assume the merry-go-round is a uniform disk of radius 2.2 and has a mass of 650 , and two children (each with a mass of 29 ) sit opposite e...

**physics**

The bolts on the cylinder head of an engine require tightening to a torque of 63 . If the six-sided bolt head is 15 in diameter, estimate the force applied near each of the six points by a socket wrench.

**physics**

A small rubber wheel is used to drive a large pottery wheel, and they are mounted so that their circular edges touch. The small wheel has a radius of 1.8 and accelerates at the rate of 7.0 , and it is in contact with the pottery wheel (radius 30.0 ) without slipping. Calculate...

**physics**

A centrifuge accelerates uniformly from rest to 18000 rpm in 180 s. Through how many revolutions did it turn in this time?

**physics**

A grinding wheel 0.28 m in diameter rotates at 2400 rpm. What is the acceleration of a point on the edge of the grinding wheel?

**physics**

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 8.55×10−23 and 5.33×10−23 , respectively. What is the magnitude of the momentum of the sec...

**Physics**

A 24 rifle bullet traveling 230 buries itself in a 3.9 pendulum hanging on a 3.0 long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal components of the pendulum's displacement.

**Salisbury University**

How long will it take a 480 N motor to lift a 335 kg piano to a sixth-story window 15.0 m above?

**physics**

A 280-g wood block is firmly attached to a very light horizontal spring, as shown in the figure. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this position, how far beyo...

**physics**

A 280-g wood block is firmly attached to a very light horizontal spring, as shown in the figure. The block can slide along a table where the coefficient of friction is 0.30. A force of 22 N compresses the spring 18 cm. If the spring is released from this position, how far beyo...

**physics**

A 110-kg crate, starting from rest, is pulled across a floor with a constant horizontal force of 420 N. For the first 13 m the floor is frictionless, and for the next 13 m the coefficient of friction is 0.35. What is the final speed of the crate?

**physics**

A 53 kg bungee jumper jumps from a bridge. She is tied to a bungee cord whose unstretched length is 13 m, and falls a total of 35 m. Calculate the spring stiffness constant k of the bungee cord, assuming Hooke's law applies.

**Physics**

A novice skier, starting from rest, slides down a frictionless 24.0 incline whose vertical height is 215. How fast is she going when she reaches the bottom?

**Salisbury University**

A spring with 53 hangs vertically next to a ruler. The end of the spring is next to the 21- mark on the ruler. If a 3.0- mass is now attached to the end of the spring, where will the end of the spring line up with the ruler marks?

**history**

where is the mississippi?

**language**

whatis muttered

**Math**

A 30-m tall flag pole and its shadow form the sides of a right triangle. On this particular day, the sun rises at 6 AM and sets at 6 PM. At what time of the morning (to the nearest minute) will the length of the shadow be exactly 40 m? (Hint: determine the angle of elevation o...

**College Chemistry**

But A stands for concentration..how would i obtain it from the data given?

**College Chemistry**

The following data are obtained for the decomposition of N2O5 at a certain temperature: 2N2O5(g)↔4NO2(g) + O2(g) Time(s) 0 200 400 600 800 N2O5 (atm) 2.10 1.85 1.63 1.43 1.26 Find the rate constant kobs for this first-order decomposition reaction in sec-1 So far I have t...

**math**

Terrance describes the amount of money made based on the # of hours worked by the function rule y= 10h. Given this function how much $ does terrance earn for each hour worked?

**6th grade**

Well...youre trying to find what F equals 1. do 0.4 divided by 2.4 2.take that answer and divide it by six !!!Then that's your answer!!!

**gammar**

A lot of people don’t have wills. Everyone needs a will, but not all people have one. Wills are important because they explain who gets your stuff after you die. You don’t want your things going to someone you don’t want them to go to. My Aunt Martha went to a ...

**gammar**

• Read two of the five paragraphs on the second page of this appendix. Write a brief paragraph of about 150 words in which you do the following: o Identify which paragraph was more effective and analyze why this is so. o Include a discussion of sentence variety and the rh...

**music**

what is the function on health insurance? What is the functions of disability insurance? whatis the functions of life insurance?

**English**

is anyone availble

**grammar**

If the interest rates are higher, than insted of spending money for purchasing new things. People go for saving to get interest on their money. With increase in interest rates the purchasing power of people decreases. If something will cost far more than it is worth because yo...

**English**

If the interest rates are higher, than insted of spending money for purchasing new things. People go for saving to get interest on their money. With increase in interest rates the purchasing power of people decreases. If something will cost far more than it is worth because yo...

**English**

In a total of 200 words, write two paragraphs with about how interest rates affect our purchasing decision. Identify the topic sentence in each by underlining it. I need help with Identifying topic sentence

**math**

ket f(x)=5 x − 4 and g(x) = x^2 − 8. Compute the following functions. 1. f(g(x)) = 2. g(f(x)) = 3. f(f(x)) = 4. g(g(x)) =

**math**

Let h(x) = 3 x2 + 2 x + 1. Let g(x) = 3√{x} + 3. (Note: If there is a nonmathematical symbol in the preceding expression, then your browser doesn't have the math symbol font. Please follow the instructions on the Tools page in Oncourse to install the STIX math fonts....

**math**

let f(x)=5 x − 4 and g(x) = x^2 − 8. Compute the following functions. 1. f(g(x)) = 2. g(f(x)) = 3. f(f(x)) = 4. g(g(x)) =

**grammar**

I think I did this right. The most important and tough goal in an individual’s life is setting up long-term goals to help him/her financially. It can be anything from savings to house building to children’s education or marriage to retirement plan. These are the basi...

**grammar**

I need help with highlighting the adverbs and underlining the adjectives. Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical performance, or television show. o Bold each adverb. o Underline each adjective The mo...

**Grammar**

I don’t want to buy that.(that,) It’s to(too) expensive. Your welcome.(welcome,) I was happy to help. An evening out(out,) can be a great way to clear one’s mind.(?) I love my car.(car,) It’s interior is so comfortable.

**Grammar**

Their(There) are three kids in the room.(?) We have been married for 20 years, and are(our) relationship is as strong as ever. I’m having trouble with my car. Can you give me some advise(advice)? The diplomats(Diplomats), are doing what they can to restore peace. I know i...

**Grammar**

Thanks you Ms.Sue I am making some corrections am I on the right track. We have been married for 20 years, and are(our) relationship is as strong as ever. I’m(I’am) having trouble with my car. Can you give me some advise? The diplomats, are doing what they can to res...

**Grammar**

Their are three kids in the room. We have been married for 20 years, and are relationship is as strong as ever. I’m having trouble with my car. Can you give me some advise? The diplomats are doing what they can to restore peace. I know it is important, so I will defiantly...

**math**

Choose the better value - 5 kg of birdseed for $6.50 or 8 kg for $10.80?

**Math**

Hi. If you don't have a circumference in the question, how do you find the radius!?

**Math**

2(x+1)/4<3x-2

**geometry**

how do you find the base area of a pyramid?

**Geometry**

What is the formula for finding the surface area of a right rectangular prism? (ex: The base of a right rectangular prism is 10 ft by 7 ft. The height is 3 ft. Find the surface area)

**social studies people**

Who Is the Portuguese nobleman who encouraged exploration and the science of navigation?

**riddle**

which of the following is least like the other? poem novel painting statue flower

**North & Central America Social Studies**

what is the lish region that formed a great arc from the eastern shore of the Mediterranean Sea to the Persian Gulf?

**world history**

How does Incan architecture influence our world today?

**science**

what are the lens called to locate a specimen on a microscope?

**math**

I do not know how to figure out the first one at all. How would i find slope of thesecant. can someone show me step by step how to at least find one of the points?

**math**

I need help with these two questions. Just take out the spaces in this link: h t t p: / /tinypic. c o m/r/nf4fp3/3

**math**

how do i do this problem? find the average rate of change over each interval. 1. f(x)= x^3 + 1 a. [2,3]

**science**

I posted this before but i realized i posted somethings that were wrong. mosquito larvae can tolerate extremely low dissolved oxygen concentrations, yet cannot survive at temperatures above 25 degrees celcius. how might you account for dissolved oxygen concentrations of such a...

**science lab**

I got these results from my dissolved oxygen lab: Temperature Dissolved Oxygen in Celcius (mg/L) 17 5.8 21 5.4 23 5.3 27 5.1 I understand that as the temperature increases the dissolved oxygen concentration decreases but i don't understand how to answer this question: does...

**science**

yes, that is what i meant but i dont understand why the dissolved oxygen concentration would be so low at such a low temperature?

**science**

mosquito larvae can tolerate extremely low dissolved oxygen concentrations, yet cannot survive at temperatures above 25 degrees celcius. how might you aaccoundt for dissolved oxygen concentrations of such a low value at a temperature of 25 degree celcius? I dont understand how...

**sciece**

compare and contrast deer population growth to human population growth in terms of a. predation and competition and b. speed of population response. I don't understand predation in terms of human population growth (can someone explain please)? I do not understand speed of ...

**science**

why do you think the deer population was only 4,00 in 1905 when the carrying capacity of the rangeland could support 30,000 deer or more. I dont understand why a population could be so far below the carrying capacity.

**Physics ?#2**

A ball is dropped from the top of a 53.0m high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 25.0m/s The stone and ball collide part way up. How far above the base of the cliff does this happen in meters?

**Physics**

A helicopter is ascending vertically with a speed of 5.00 m/s. At a height of 120 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? v_0 for the package equals the speed of the helicopter Help?

**science**

by the way, i'm studying ecological succession

**science**

how does a glacier turn into a lake? does it just melt?

**math**

how do I solve this limit (-> is an arrow meaning "heading towards" lim x-> 2 (x-6)^(2/3)

**math**

how would I do this limit?(by the way -> is an arrow( lim x-> 0 (5x^3+8x^2)/ (3x^4 - 16x^2)

**math**

An object dropped from restfrom the top of a tall building falls y=16t^2 feet in the first t seconds. Find the speed of the object at t=3 seconds and confirmalgebraically. The answer is 96 feet/sec but how do i figure it out? cans omeone show me steps? thanks

**french**

also what tense is il rigolait

**french**

which verb tense is this elles aient tort

**algebra**

the algebraic expression dN/dT=riN expresses what? a. biotic potential b. population density c. carrying capacity d. demographic structure e. gause principle is it B?

**bio- double check answers**

the climax community?

**5th grade math-ms sue**

their would be 9 pencils all together.

**5th grade math-ms sue**

their would be 9 pencils all together.