Friday

March 6, 2015

March 6, 2015

Total # Posts: 1,938

**Chemistry**

A solution contains 3.75g of nonvolatile pure hydrocarbon in 95g acetone. The boiling points of pure acetone and the solution are 55.95C and 56.50C, respectively. The molal boiling point constant of acetone is 1.71 C*kg/mol. What is the molar mass of the hydrocarbon?
*February 10, 2011*

**AP Physics**

A transverse wave is traveling with a speed of 500 m/s on a horizontal string. If the tension in the string is increased by a factor of 2, what is the speed of the wave?
*February 9, 2011*

**Chemistry**

3 H2 (g) + N2 (g) --> 2 NH3 (g) How many liters of ammonia gas can be produced from 10.0 L of N2 and 20.0 L of H2? Assume all gases are measured at the same temperature and pressure.
*February 8, 2011*

**finance**

A firm has beginning inventory of 300 units at a cost of $11 each. Production during the period was 650 units at $12 each. If sales were 700 units, what is the value of the ending inventory using LIFO? Note: LIFO, last-in, first-out represents that the last produced will be ...
*February 8, 2011*

**Chemistry**

from the equation: Ksp=(.08M)(F^-)^2 there are two unknown how do we solve it
*February 8, 2011*

**Social Studies**

Thanks, that is quite helpful do you have any additional information or links you could provide me with. I need to write like 3 pargraphs about this topic. Thanks Ms.Sue!
*February 6, 2011*

**Social Studies**

What factors may contribute to the differences in GDP per capita in the areas of the world in places like Europe which is high compared to Africa which is low? I know that the United States and Europe are more technologically advanced than Africa. I also know that economically...
*February 6, 2011*

**Physics**

591.85 J
*February 3, 2011*

**Forensic Science**

I have to order these steps that a CSI would do upon arrival of scence. 1. Look for identification on the body. 2. Notify the Medical Examiner to determine if head injury is sufficient to cause death. 3. Have the forensic laboratory analyze blood on trail and match it to blood...
*February 2, 2011*

**Math**

A major corporation is building a 4325 acre complex of homes, offices, stores, schools, and churches in the rural community of Glen Cove. As a result of this development, the planners have estimated that Glen Clove's population (in thousands) t yr from now will be given by...
*February 1, 2011*

**Statistics**

Calculate the first, second, and third quartiles of the following samples. 5 8 2 9 5 3 7 4 2 7 4 10 4 3 5 23
*January 31, 2011*

**Physics**

a block , mass .10 kg, slides from rest without friction down an inclined plane 2m long which makes an angle of 20 degrees with the horizontal.(a) WWhat force accelerates the block down the plane?(b)j What is the velocity of the block when it reaches the botton of the pplane...
*January 30, 2011*

**English**

if u use the answer correctly and check them u will get 88.2 like i just got
*January 28, 2011*

**Math**

Domain of f o g F(x)=5/x+4 ; g(x)=1/x f(x)=x/x+5 ; g(x)=6/x
*January 28, 2011*

**College English**

B. They replaces aliens; them replaces abductees.
*January 26, 2011*

**chemistry**

What is the nuber of grams of oxygen present in 4.50 x 10^22 SO3 moleucles?
*January 26, 2011*

**chemistry**

What are the number of atoms of nitrogen in 10g of N2H4?
*January 26, 2011*

**chemistry **

how many moles are in 5 grams of no2 molecules?
*January 25, 2011*

**equations calculus**

what is the value of y in the equation (y/(2y-x))=0.5
*January 25, 2011*

**financial analysis**

an item which may be converted to cash within one year or one operating cycle of the firm is classified as a
*January 23, 2011*

**Spanish**

what is the correct pronoun: El hombre ____ (el libro) da al joven.
*January 21, 2011*

**Math Please Help!!**

Simplify. You may use the properties to help. When you type your answer, do not space between numbers and symbols. (-5a)(3b)(2c) Would this equal -30abc?? HELP!
*January 20, 2011*

**physics**

A bar 5m long has a weight of 50nt attached to the other end is 80nt. Determine the magnitude, direction, and point of application of the equilibriant.
*January 18, 2011*

**Physics**

.5m from Paul*
*January 18, 2011*

**Physics**

Paul and henry carry a sack weighing 600nt on a pole between them. If the pole is 2m long and the load is .dm from Paul, what forrce does each boy exert?
*January 18, 2011*

**Psychology**

he has a weak ego
*January 15, 2011*

**Microeconomics**

Scarcity, utility and distribution are the underlying principles governing every economy. Human needs can never be satisfied (non-satiation principle) but the caveat is that when human attains more of the same things, they become happy (increasing utility: a measurement of ...
*January 15, 2011*

**optimization**

A model space shuttle is propelled into the air and is described by the equation y= (-x2/2e) +ex (in 1000 ft), where y is its height in feet above the ground. What is the maximum height that the shuttle reaches?
*January 13, 2011*

**physics**

a car starts from rest and travels for 4.2 s with a uniform deceleration of 1.8m/s^2. what is the final velocity of the car?
*January 13, 2011*

**statistics urgent**

Consider all cars that are involved in an accident and assume that all cars are classified as either small or large. The probability that a small car is involved an accident is .2 if a small car is involved in an accident, the probabbility that there was fatality in that ...
*January 13, 2011*

**statistics**

Suppose the number of customer complaints per day on the morning shift 6-12 noon at Doys is distributed as # of complaints f(x) 0 .3 1 ? 2 .2 what is the value of the missing probability? What is the average number of complaints per day on the morning shift at Doys? What is ...
*January 13, 2011*

**Math**

If ∆ ABC ~ ∆ DEF, BC = 12 cm, EF = 10 cm, and AC = 18 cm, find DF.
*January 12, 2011*

**Math**

Every Square is a rhombus. True or False? This one has me confused.
*January 11, 2011*

**Math**

In a rhombus all angles are right angles. True or False?
*January 11, 2011*

**9th grade alegbra**

solve -5/6=2/3(3c+4)
*January 11, 2011*

**9th grade alegbra**

solve df + 10h=3 for h
*January 11, 2011*

**Physics**

The parachute on a race car that weighs 8036 N opens at the end of a quarter-mile run when the car is traveling 39 m/s. The acceleration of gravity is 9.81 m/s2 . What net retarding force must be supplied by the parachute to stop the car in a distance of 1270 m? Answer in ...
*January 8, 2011*

**math**

draw one set of letter from set 1 and place in set 2 draw one letter from set 2 place in set 3 now draw one letter from set 3 what is the probability that the last letter drawn is b? set 1 = bcb set 2 = bb set 3 = b
*January 5, 2011*

**math**

find the radius of each circle with the given measurement 20. C= 18pie in
*January 4, 2011*

**math**

use either substitution or elimination to solve 8x+15y=13 2x-5y=-1
*January 2, 2011*

**math**

use either substitution or elimination to solve 9x+5y=-6 4x+3y=2
*January 2, 2011*

**related rates problem-calculus**

A spherical balloon is being filled with air in such a way that its radius is increasing at a rate of 2 centimeters per second. At what rate is the volume of the balloon changing at the instant when its surface has an area of 4 pi square centimeters?
*December 30, 2010*

**Physics HELP!**

At what minimum speed must a roller coaster be traveling when upside down at the top of a circle if the passengers are not to fall out? I'm having trouble understanding what it means by minimum speed. I know that at the top there are two forces, the force of gravity and ...
*December 25, 2010*

**Physics**

A truck traveling at a constant speed of 40.0 km/h applies its brakes and comes to a complete stop in 5.0 s. The truck starts again and accelerates at a constant rate of 0.80 m/s2. After restarting, how far does the truck travel before reaching its original speed of 40.0 km/h?
*December 17, 2010*

**English**

Is logic and thinking the same thing. Like could i say His logic and thinking became completely different.
*December 14, 2010*

**Physics**

The sound travels in all directions .. so it's power is spread out over the surface of a sphere. The radius of this sphere increases as it travels, distributing the power (P) over a greater and greater area (A) that reduces it's intensity (I) in W/m² Intensity, I...
*December 13, 2010*

**7th grade**

500 words on (how) to write about the law of april 6th 1830?help
*December 12, 2010*

**physics**

The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 4.50 X 10^5 Pa, and the horizontal divisions represent 3.00 X10^-3 m3. Determine the work done (including algebraic sign) in each segment of the path. (a...
*December 10, 2010*

**college**

Dale Emerson served as the chief financial officer for Reliant Electric Company, a distributor of electricity serving portions of Montana and North Dakota. Reliant was in the final stages of planning a takeover of Dakota Gasworks, Inc. a natural gas distributor that operated ...
*December 8, 2010*

**business law**

Dale Emerson served as the chief financial officer for Reliant Electric Company, a distributor of electricity serving portions of Montana and North Dakota. Reliant was in the final stages of planning a takeover of Dakota Gasworks, Inc. a natural gas distributor that operated ...
*December 8, 2010*

**Math**

To conduct a scientific experiment, students need to mix 90 mL of a 3% acid solution. They have a 1% and a 10% soulution available. How many mL of each of the two solution must they combine to pruduce 90mL of the 3% solution?
*December 5, 2010*

**religion**

According to the Cow (2nd sura of Qur’an), Muslims a) must not be the aggressor in war b) should avoid violence at all cost c) must formally declare war before attacking d) may not mistreat captives
*December 4, 2010*

**math**

how do i solve 4/r5+6/rt divided by 12/st
*December 1, 2010*

**Finance**

You are evaluating a proposed expansion of an existing subsidiary located in Switzerland. The cost of the expansion would be SF 32.4 million. The cash flows from the project would be SF 9 million per year for the next five years. The dollar required return is 15 percent per ...
*December 1, 2010*

**physics**

Joe wishes to hang a sign weighing 705 N so that cable A, attached to the store, makes a 30.0° angle, as shown below. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B?
*November 30, 2010*

**physics**

You are driving a 2520.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a ...
*November 30, 2010*

**Chemistry**

Is this true?
*November 29, 2010*

**Chemistry**

True or False: A non-spontaneous reaction is converted into a spontaneous reaction in a voltaic cell by the expense of electrical energy. I believe it is true because in a non spontaneous reaction, energy must be induced in order for it to occur. Is this true?
*November 29, 2010*

**College Chemistry**

Am I correct?
*November 29, 2010*

**College Chemistry**

If current is passed in an electrolytic cell containing sodium nitrate, NaNO3, dissolved in water, what are the products at the anode and the cathode? If it's dissolved in water then it is: NaNO3 -> Na+ + NO3- right? So you have... Anode: NaNO3 -> Na+ + e- Cathode : ...
*November 29, 2010*

**algebra**

cube has avolume of 729 cubic centimeters what is its side length
*November 28, 2010*

**physics help**

A 1210 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1820 N crate hangs from the far end of the beam. The angle between the beam and the horizontal is 30 degrees upwards and the angle between the horizontal and the...
*November 27, 2010*

**physics help**

A 1210 N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1820 N crate hangs from the far end of the beam. The angle between the beam and the horizontal is 30 degrees upwards and the angle between the horizontal and the...
*November 27, 2010*

**Molecular Biology**

You are working in a lab that has recently discovered a new viral protein. Describe in detail how you could generate a polyclonal antibody preparation against this protein. Include a full description of production and purification. Describe in detail an experiment that could ...
*November 26, 2010*

**Math**

Solve the equation: 2^x^2-4x = (1/16)^x-4
*November 25, 2010*

**physiology**

if the value of ion concentration divided by atomic weight is equal for na+ and ca2+, which will have the higher osmolality?
*November 24, 2010*

**American Democracy**

Acts of Congress.
*November 23, 2010*

**Physics**

A ferryboat traveling at a speed of 30 km/h attempts to cross a river with a current of 5 km/h. What is the boat's speed relative to the shore? A.8 km/h B.25 km/h C.30.4 km/h D.32.8 km/h
*November 23, 2010*

**Geometry**

Hi, I need some help with SIN COS TAN
*November 22, 2010*

**Math**

in 6-6Ã·6Ã—6+6=0 where would the parenthesis go
*November 22, 2010*

**chemistry**

A 0.446 g- sample of an unknown monoprotic acid was titrated with 0.105 M KOH. the molar mass is 120 g/mol What is the pKa value?
*November 22, 2010*

**math**

Three rectangles have exactly the same area. The dimensions of each rectangle (as length and width) are a and b; a – 3 and b + 2; and a + 3 and b – 1. Find the area of the rectangles.
*November 17, 2010*

**math**

A painter leans a ladder against a vertical wall. The top of the ladder is 7 meters above the ground. When the bottom of the ladder is moved 1 meter farther away from the wall, the top of the ladder is 5 meters above the ground. What is the length of the ladder? Round to the ...
*November 17, 2010*

**calculus**

Find all relative extrema and points of inflection of the function: f(x) = sin (x/2) 0 =< x =< 4pi =< is supposed to be less than or equal to. I can find the extrema, but the points of inflection has me stumped. The inflection point is (2pi,0) but shouldn't there ...
*November 14, 2010*

**10th grade**

If m<pqs=3x+13and m<sqt=6x-2,
*November 13, 2010*

**electrical**

does anyone have the exam answers to exam 00603300
*November 11, 2010*

**electrical**

penn foster exam 00603300
*November 11, 2010*

**Accounting**

Complete exercises 2-1 and 2-2 on pp. 95-98 of Computer Accounting with Peachtree Complete® 2010 using Peachtree.
*November 11, 2010*

**College Chemistry**

Entropy will be greater than 0 right, since there is more disorder in the gaseous state? What about the Enthalpy?
*November 9, 2010*

**College Chemistry**

Predict the signs of delta H (Enthalpy) and delta S (Entropy) for the evaporation of water at 85 C.
*November 9, 2010*

**physics**

Two children seat themselves on a seesaw, the one on the left has a weight of 400N whlie the one on the right weighs 300N. The fulcrum is at the midpoint of the seesaw, if the child on the left is not at the end but is 1.5m from the fulcrum, and the seesaw is balanced, what is...
*November 9, 2010*

**public administration**

i dont know where to begin to answer these questions and this is something we have not gone over in class yet!
*November 7, 2010*

**public administration**

Assume that after all the rhetoric and great debates on health care reform that Congress decided the rate regulation that has been used for a century to control the prices and services of common carriers in transportation is an appropriate model. It therefore established the &...
*November 7, 2010*

**college**

creating a slide on debunking gender misconception any tips
*November 4, 2010*

**physics**

A person is riding a bicycle, and its wheels have an angular velocity of +15.5 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is +15.5 revolutions. (a) How much time does it take for the ...
*November 3, 2010*

**math**

The earth has a radius of 6,380 km. The formula for the volume of a sphere is �� V = 4/3 ðx^3, and the formula for surface area of a sphere is A = 4ðx^2 . Find the volume and surface area of the earth and write the answer in scientific notation with two ...
*November 3, 2010*

**chemistry**

How many mL of 0.25 M H2SO4 can be made from 50.0mL of 0.50 M H2SO4? Also in this case, what does the capital M stand fro?
*November 2, 2010*

**science**

if a thermometer contained a gram of mercury, how much would the volume of the mercury change when the temperature rose from 0 degrees celcius to 30 degrees celcius?
*November 1, 2010*

**chem 30**

Do you have a textbook?
*November 1, 2010*

**chemistry**

The solubility of barium nitrate at 100°C is 34 g/100 g of H2O and at 0°C is 5.0 g/100g of H2O. If you start with 100 g of Ba(NO3)2 and make a saturated solution in water at 100°C, how much water is required? If the saturated solution is cooled to 0°C, how much...
*October 29, 2010*

**Ecology**

4. c 5. a 6. c 7. b 8. a 9. b 10.c
*October 29, 2010*

**physics**

A vector is 100 units long and makes an angle of 50 degrees with the positive x-axis. find the x and y components of this vector.
*October 28, 2010*

**project management**

i have to write a 50-100 word summary for a final project proposal being the project manager.any ideas what kind of projects i can use?
*October 26, 2010*

**Physics**

A 1030 kg car is pulling a 360 kg trailer. Together, the car and trailer have an acceleration of 2.07 m/s2 directly forward. How do you find net force on the car and trailer?
*October 23, 2010*

**IT**

Service Request SR-kf-013 5 page section of the paper. This should include: o Testing Process Summary: Define a test plan or script that identifies major software functionality and hardware to be tested along with the required outcomes. o Installation Process and Training Plan...
*October 22, 2010*

**IT**

Service Request SR-kf-013
*October 22, 2010*

**College Chemistry**

"A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated cylinder to obtain...
*October 20, 2010*

**Chemistry**

The Question Is: "A student weighs 0.347 g of KHP on a laboratory balance. The KHP was titrated with NaOH and the concentration of the NaOH determined to be 0.110 M. For the second titration, the student correctly diluted 6 M HCl from the reagent shelf using a graduated ...
*October 20, 2010*

**College Chemistry**

Can anyone give me an update on this?
*October 19, 2010*

**College Chemistry**

Anyone know if my answer is correct?
*October 19, 2010*

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