Tuesday

August 4, 2015

August 4, 2015

Total # Posts: 4,090

**science**

how might the environmental impacts of deforestation and sprawl affect the human community of Pinchot
*July 23, 2012*

**Physical Science**

A tire contains air at a pressure of 2.8 bar at 10C. If the tire’s volume is unchanged, what will the air pressure in it be when the tire warms up to 35C as the car is driven?
*July 21, 2012*

**Chemistry**

About 13% of the acid in a 0.10M solution of a weak acid dissociates to form ions. What is the H3O+ concentration? What is the OH- concentration? What is the pH of the solution?
*July 18, 2012*

**Chemistry**

What is the HCl concentration if 72.1ml of 0.035M NaOH is required to titrate a 20.0ml sample of the acid?
*July 18, 2012*

**math**

Write a story problem that can be solved using the equation 3/4 x 36 = n I know the answer but I don't know how to write a story problem to go with it... I saw a question similar to this but it had two fractions and confused me...
*July 10, 2012*

**science**

How much force is needed to give a 5-kg box and upward acceleration of 2 m/s2?
*July 5, 2012*

**science**

How fast must a fall be thrown upward to reach a height of 12 m?
*July 5, 2012*

**physical science**

The acceleration of gravity on the surface of Venus is 8.9 m/s2. Would a ball thrown upward on Venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?
*July 5, 2012*

**physical science**

. The brakes of a car are applied to give it an acceleration of -3 m/s2. The car comes to a stop in 5 s. What was its speed when the brakes were applied?
*July 5, 2012*

**physical science**

. Three forces, each 10 lb, act on the same object. What is the maximum total force they can exert on the object? The minimum total force?
*July 5, 2012*

**Trig**

Find sin2theta, cos2theta if csctheta=13/12 and lies in quadrant II. Thank you!
*June 13, 2012*

**chemistry**

A 375 g sample of well water is found to contain 17.0 mg of lead. How much lead (in parts per million) is in the well water? Round to the nearest tenth. Don't forget the unit.
*June 12, 2012*

**finance**

The Nutrex Corporation wants to calculate its weighted average cost of capital. Its target capital structure weights are 40 percent long-term debt and 60 percent common equity. The before tax cost of debt is estimated to be 10 percent and the company is in the 40 percent tax ...
*June 10, 2012*

**finance**

Faulkner's Fine Fries, Inc. (FFF), is thinking about reducing its debt burden. Given the following capital structure information and an expected EBIT of $50 million (plus or minus 10 percent) next year, should FFF change their capital structure? Current Porfolio Total ...
*June 10, 2012*

**finance**

P5 For the following projects, compute NPV, IRR, MIRR, profitability index, and payback. If these projects are mutually exclusive, which one(s) should be done? If they are independent, which one(s) should be undertaken? Year 0 -1,000 -1,500 -500 -2,000 Year 1 400 500 100 600 ...
*June 10, 2012*

**finace**

Find the IRR and MIRR of a project if it has estimated cash flows of $5,500 annually for seven years if its year-zero investment is $25,000 and the firm's minimum required rate of return on the project is 10 percent.
*June 10, 2012*

**maths**

a cyclist and jogger are 20 miles apart. the cyclist rides at 17 mph and the jogger runs at 7 mph. they move towards each other. a fly starts on the nose of the cyclist and flies at 20 mph from the cyclist to the runner and back. it continues back and forth until the cyclist ...
*June 9, 2012*

**rate of change**

For a person at rest, the function p(t) = -20 cos(300˚t) + 100 models blood pressure, in millimeters of mercury ( mm Hg), at time t seconds. What is the rate of change in blood pressure at 3 s?
*June 9, 2012*

**biology **

why does The sodium-potassium pump move potassium ions into and sodium ions out of a cell down a protein canal?
*June 6, 2012*

**math**

Susan's back yard is rectangular with dimensions 39 yd. by 71 yd. Carlos's back yard is rectangular with dimensions 30 yd. by 50 yd. How much larger is the area of Susan's back yard than the area of Clarlos's back yard?
*June 4, 2012*

**algebra 2**

pleas help me with my home work 00703600
*June 4, 2012*

**Physics**

A plane leaves Seattle, flies 84.0 at 21.0 north of east, and then changes direction to 53.0 south of east. After flying at 125 in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a rescue crew .How far should the...
*June 3, 2012*

**accounting**

. Making Product X requires 4,000 hours of labor and Product Y requires 6,000 hours of labor. TUV undertakes an automation program that reduces the consumption of labor required by Product Y to only 2,000 hours of labor. Product X is not affected by the automation process. ...
*May 31, 2012*

**Physics**

Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 16.0 m, B = 12.0 m, C = 13.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...
*May 29, 2012*

**chemistry**

how many moles of ammonium sulfate can be made from the rxn of 30.0 mol of NH3 with H2SO4 according to the following equation: 2NH3 +H2SO4-->(NH4)2SO4
*May 28, 2012*

**Factor Theorem(Math)**

Why is x-1 not a factor of f(x)= 4x^3+8x^2+x-3?
*May 27, 2012*

**Math **

A 3m tall post casts a shadow 2m long . If a tree casts a shadow 9m long at the same time how tall is the tree ?
*May 22, 2012*

**pre calc**

log(x^2+2x-3/x^2-4)-log(x^2+7x+6/x+2)
*May 22, 2012*

**Chemistry help please?**

order these highest PH to the lowest PH Ca(OH)2(aq) HCN(aq) NH3(aq) LIOH(aq) HCI(aq)
*May 20, 2012*

**Math Help!!**

Solve 2x-y-5z=1 x+2y+3z=9 3x+6y+z=11 2x-3y=-13 -5x+2y=16
*May 17, 2012*

**Math**

1) Matt traveled the first leg of his trip for 1350 miles on a large jet. He then traveled an additional 600 miles on a private plane to reach his destination. If the speed of the jet was three times the speed of the plane and the total time in the air was 6 hours determine ...
*May 17, 2012*

**Math**

The average of to consecutive Even integers is 17. Find the largest of the four integers ?
*May 16, 2012*

**Math**

Um... 365+365?!
*May 15, 2012*

**physics**

How did you get F12 and F13 ??
*May 15, 2012*

**Math **

Johnsons accumulated a nest egg of $40,000 to use as down payment toward a new home. Present gross income has them in high tax bracket, decided to invest min $2400/month in payments (for tax break). Financial obligations cannot exceed $3000/month. If local mortgage rates were ...
*May 15, 2012*

**Math **

Johnsons accumulated a nest egg of $40,000 to use as down payment toward a new home. Present gross income has them in high tax bracket, decided to invest min $2400/month in payments (for tax break). Financial obligations cannot exceed $3000/month. If local mortgage rates were ...
*May 15, 2012*

**Math**

Sarah secured a bank loan of $200,000 for the purchase of a house. The mortgage is to be amortized through monthly payments for a term of 15 yr, with interest rate of 6%/year compounded monthly on the unpaid balance. She plans to sell her house in 5 yr. How much will Sarah ...
*May 15, 2012*

**math**

a small plane sitting on a runway 5 miles west and 2 miles north of town is scheduled to fly to a second runway 17 miles east and 25 miles north of the same town. to the nearest mile, what is the distance between the two runways
*May 14, 2012*

**solid geometry... **

find the area of the earth's surface within the Arctic Circle; that is, in latitude north 66° 32' N. thank you! :D
*May 12, 2012*

**solid mensuration? help.**

Window glass formerly was made by gathering a lump of molten glass on the end of a hollow rod blowing it into the form of a large hollow cylinder about 6 ft. long and 1 1/2 ft. in diameter. This was cut longitudinally and then placed in an oven and heated until it softened, ...
*May 12, 2012*

**solid mensuration**

the area of the total surface of a polyhedron weighing 64 lb. is 340 sq. in. what is the surface of a similar polyhedron made of the same material and weighing 1000 lb. ? thank you!!
*May 12, 2012*

**math**

the area of the total surface of a polyhedron weighing 64 lb. is 340 sq. in. What is the surface of a similar polyhedron made of the same material and weighing 1000lb. ?
*May 7, 2012*

**math (solid mensuration)**

A light is placed 5 ft. from the center of a globe 3 ft. in diameter. Find the area of the illuminated portion. thank you!
*May 7, 2012*

**physics**

1.41 m/s
*May 7, 2012*

**Spanish-Thank you**

Thank you all
*May 5, 2012*

**Spanish-Please check**

Thank you I would appreciate that Ms. Sue
*May 5, 2012*

**Spanish-Please check**

¿Te gustaría quedarte en una pensión o en un hotel? ¿Porque? Me gustaría quedarme en una pensión porque una pensión es menos cara que un hotel.
*May 5, 2012*

**physics**

(a) calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) *climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min) * (b) calculate the gain in gravitational potential energy for a 50-kg person if each step 0.18m ...
*May 4, 2012*

**physics**

(a) a person in a wheelchair approaches a 0.50-m-high ramp with a speed of 3.5 m/sec. calculate the final speed of the wheelchair at the top of the ramp if the person coasts up and friction is negligible. (b) what initial speed would be necessary to be 1.0 m.sec? i need this ...
*May 4, 2012*

**Spanish-Thank you**

Thank you-I see where I made the mistake I think I got confused with the presentaste having the (te) on the end so I thought I didn't have to put the (te) in front of presentaste Thank you again
*May 3, 2012*

**Spanish-Please check**

I had to change these into the past tense preterite are they correct tú presentarse would it be tú presentaste él sentirse would it be él se sintió
*May 3, 2012*

**algebra**

h = 52y
*May 3, 2012*

**math**

your bike tire has a radius of 14 inches. If your tire makes 100 revolutions, how many feet does your bike travel?
*April 25, 2012*

**math**

Your bike tire has a radius of 14 inches. If you travel a distance of 56 feet on your bike, how many complete revolutions did your bike tire make?
*April 25, 2012*

**Physics**

Water has a density of 1000kg/m^3. The depth of a swimming pool at the deep end is about 4m. A)What is the volume of a column of water 4m deep and 1m^3 in cross-sectional area? B)What is the mass of this column of water? C)What is the weight of this column of water in newtons...
*April 24, 2012*

**foreign language**

Americans Despite its ethnic diversity, the United States has managed to absorb bits and pieces of many cultures and weave them into a unique culture that is strikingly consistent and distinct. You can pick out Americans anyplace in the world, often very quickly, because of ...
*April 22, 2012*

**history**

There is a general answer if you look from the doves perspective
*April 16, 2012*

**history**

According to the doves(people opposed to the Vietnam war) answer this question. Was the motive for US involvement in Vietnam primarily to help the average South Vietnamese citizen or was it primarily to gain a power advantage over Russia and China? That is, did US leaders care...
*April 16, 2012*

**trig**

An airplane is flying at an altitude of 31,000 feet when it begins its descent for landing.If the runway is 104 miles away,at what angle does the airplane descend?
*April 15, 2012*

**trig**

You measure the angle of elevation from the ground to the top of a building as 32 degrees.When you move 50 meters closer to the building,the angle of elevation is 53 degrees. How high is the building?
*April 15, 2012*

**trig**

A submersible traveling at a depth of 250 feet dives at an angle of 15 degrees with respect to a line parallel to the water's surface. It travels a horizontal distance of 1500 feet during the dive. What is the depth of the submersile after the dive?Explain how the angle of...
*April 15, 2012*

**Phys**

Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
*April 11, 2012*

**ETHICS**

This pisses me off ---- this is only a 300 level class at the university of phoenix which you are paying 1300 to 1600 to take this class and you cant do your own essay.....seriously!
*April 10, 2012*

**biology**

thank you, i have seen that site. but it doesnt not explain the steps and process that the brain takes in order to make a person fall sleep
*April 9, 2012*

**biology**

What part of the brain controls sleep and how does it work. I am looking for a easy to understand answer because when i have searched i do not understand it.
*April 9, 2012*

**english**

is giving information(such as mentioning details about something that happened) considered part of ethos?
*April 1, 2012*

**physics--please help**

thank you soooo much...the answer is correct..thanks again for working on it for this long
*April 1, 2012*

**physics--please help**

yes they hit it at 256.7..i typed it wrong...i am still not getting the correct beat frequency
*April 1, 2012*

**physics--please help**

I am sorry..but this is not the right answer either
*April 1, 2012*

**physics--please help**

could you help me more with this?
*April 1, 2012*

**physics--please help**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
*April 1, 2012*

**physics--please help**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
*April 1, 2012*

**physics**

This doesn't give me the correct answer
*March 31, 2012*

**physics**

You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
*March 31, 2012*

**physics--please help**

how do you find beat frequency?
*March 30, 2012*

**Math**

why does 1/(n(n+1)) converges?
*March 28, 2012*

**physics**

NEED HELP WITH ONLY PART C Two 135.1.0-W speakers, A and B, are separated by a distance D = 3.6 m. The speakers emit in-phase sound waves at a frequency f = 11800.0 Hz. Point P1 is located at x1= 4.50 m and y1 = 0 m; point P2 is located at x2 = 4.50 m and y2 = –y. a) ...
*March 27, 2012*

**physics--please help**

A half-open pipe is constructed to produce a fundamental frequency of 230 Hz when the air temperature is 17 °C. It is used in an overheated building when the temperature is 39 °C. Neglecting thermal expansion in the pipe, what frequency will be heard?
*March 26, 2012*

**algebra**

8-t/2=53
*March 26, 2012*

**Physics-Thermo**

Imagine a 600 g of water at 70oC in a piston-cylinder device. Initially, the 9-kg, 13-cm diameter piston rests on two stops such that the water occupies a volume of 0.2 m3. Heat is transferred to the system until the water is completely vaporized. Take the atmospheric pressure...
*March 26, 2012*

**thermodynamics**

A piston-cylinder device contains 100 g of ethylene gas initially at 27oC, 115 kPa. Ethylene is heated and the piston starts to rise until the volume reaches 90 L and merely touches a linear spring that has a spring constant of 60 kN/m. More heat is added until the piston ...
*March 26, 2012*

**physics**

The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be
*March 24, 2012*

**physics**

this gives me the answer for drag force
*March 24, 2012*

**physics**

A ball of circumference 71.5 cm and mass 640 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.) (a) Calculate the buoyant force on the ball.
*March 24, 2012*

**physics**

A child loses his balloon, which rises slowly into the sky. If the balloon is 13 cm in diameter when the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension can be neglected. (a) 2200 m
*March 23, 2012*

**physics**

A mass M = 5 kg moves with an initial speed v = 3 on a level frictionless air track. The mass is initially a distance D = 0.250 m away from a spring with k = 844 N/m, which is mounted rigidly at one end of the air track. The mass compresses the spring a maximum distance d, ...
*March 23, 2012*

**chemistry**

are compressive strength and brittle the same thing..if not then what is the difference?
*March 21, 2012*

**math **

16stickers are placed in a box if one sticker Is drawn from the box which color is it most Likely to be? Key:-1 Red I I I Blue I I I I Yellow I I Green I I I I I I I
*March 20, 2012*

**chemistry**

the components in the following glycerolphospholipid are: O || CH2OC(CH2)14CH3 | O | || CHOC(CH2)14CH3 | O | || + CH2OPOCH2CH2NH3
*March 20, 2012*

**chemistry**

what is the difference between a nanocomposite and a nanotube?
*March 19, 2012*

**chemistry**

please give me an example of a nanocomposite material
*March 16, 2012*

**chemistry 30a**

What volume (in mL) of an 8% w/v acetic acid solution would be needed to form 2.2 L of carbon dioxide gas at 25.2 degrees Celsius and 0.9982 atm? Assume the acid is reacted with excess sodium bicarbonate, and round your final answer to two sig figs.
*March 12, 2012*

**math 156Trig Help**

2x
*March 11, 2012*

**Physics**

ions
*March 7, 2012*

**physics**

A box with a mass of 2 kg is lifted (without acceleration) through a height of 8.0 m in order to place it upon the shelf of a closet. (a) What is the increase in potential energy of the box? 1 . J (b) How much work was required to lift the box to this position? 2 J
*March 5, 2012*

**Physics**

A roller-coaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the potential energy at ...
*March 5, 2012*

**Algebra**

in put y=x(10)
*March 5, 2012*

**Math**

The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (3, –6) (3, –3) (3, 0) (3, 9)
*February 28, 2012*

**Geometry**

b.20 because 1:3:5 1+3+5=9 180/9=20 20:60:100
*February 28, 2012*