Saturday

February 28, 2015

February 28, 2015

Total # Posts: 2,561

**chemistry**

A solution of ethanol (C2H5OH) in water is prepared by dissolving 87.4 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
*January 3, 2011*

**Geometry**

Find the surface area of a right octagonal pyramid with height 2.5 yards, and its base has apothem length 1.5 yards.
*December 30, 2010*

**Physics**

990 N
*December 29, 2010*

**GENERAL ART**

HOW DO YOU DRAW 3 D BOXES
*December 21, 2010*

**7th Pre-Algebra Word Problem**

Thanks
*December 20, 2010*

**7th Pre-Algebra Word Problem**

Approximately one-seventh of the people in the United States are left-handed. The population of the United States is about 300 million. Write and solve an equation to estimate howmany people in the United States are left handed.
*December 20, 2010*

**Physics**

Two brothers are jogging, Josh and Drake. Josh has 1/2 the KE of Drake. Also, he is twice the mass of Drake. Plus, Josh had to increase his speed by 1.35 meters/second to achieve the same kinetic energy of Drake. What is the initial velocity?
*December 18, 2010*

**Math**

prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.
*December 17, 2010*

**math**

find three rational numbers between the negtive square root of 26 and the negtive square root of 15 and explain how you got the answer
*December 17, 2010*

**Math**

prove that two triangles are congruent if they have 2 equal adjacent angles and the side inbetween them is also the same.
*December 16, 2010*

**high school**

1400n
*December 16, 2010*

**math**

Find the range of possible measures if each set of expressions represents measures of the sides of a triangle:x 2x+10, x+8
*December 16, 2010*

**Language arts**

Figurative language
*December 15, 2010*

**geometry**

Write and solve an inequality to find the calues of x for which the area of the rectangle is greater than the are of the triangle
*December 15, 2010*

**11th grade**

20xsquared+40 x+15=0
*December 13, 2010*

**algebra **

Thanks
*December 13, 2010*

**algebra **

10-d=19 What is d? I think it is -9.
*December 13, 2010*

**Physics**

6000
*December 11, 2010*

**math**

how do you solove I=$440 P=??? R=7% T=4 years
*December 9, 2010*

**7th grade**

i need help with another I=$440,P=??,R=5%,T=4 years what is p
*December 9, 2010*

**7th grade**

thank you
*December 9, 2010*

**7th grade**

I=$440 P??? R=7% T=4years this is simple interest
*December 9, 2010*

**7th grade**

i need help with simple interest math homework.NOW!
*December 9, 2010*

**History**

dont go down really dont go i mean it
*December 9, 2010*

**Finance**

The extent to which inventory financing may be used depends on
*December 9, 2010*

**finance**

At age 5, how much would you have to save per month to have $1 million in your account at age 65, if your investment rate was 10% per year? Assume no taxes and compounding on a monthly basis.
*December 9, 2010*

**trig**

solving radical equations... help! 5+¡în+1= n+4
*December 8, 2010*

**Math**

12 Quarters 7 Dimes 3 Nickels
*December 7, 2010*

**Math**

12 quarters 7 dimes 3 nickels
*December 7, 2010*

**Math question**

pi*r^2 3.14*20cm.^2 =1256.63 take that and divide by four and you get 314.16
*December 7, 2010*

**physics**

I have a capacitance of 5.75e-10 What is it in Farads?
*December 7, 2010*

**pre algebra 6th grade**

250=x-.08x 250=(1-.08)x 250/(1-.08)=x 271.73=x
*December 7, 2010*

**algebra**

x=4 y=2 perimeter= (2*4)+(2*2) = 8+4 =12
*December 7, 2010*

**Physics**

I need help solving for q. Here is the formula. F=(k*q*2q)/r^2
*December 7, 2010*

**Geometry**

h=(2A)/B =(2*6.75)/3 =4.5 m
*December 7, 2010*

**bio 102**

assuming the standard values for the atmospheric partial pressure of N2, O2, AND CO2 at sea level, what is the approximate total partial pressure of the remainig atmospheric gases?
*December 7, 2010*

** Chemistry**

0.500 moles of NOCl is placed in a 1.00L vessel at 700K,and after the system comes to equilibrium,the concentration of the NOCl is .440M. Calculate the value of Kc for the reaction @NOCl(g)->2NO(g)+Cl2(g)?
*December 6, 2010*

**math**

what is the ascending order of 8+7x^2-12x^3-4x^3y
*December 6, 2010*

**chemistry**

What is the formula for the compound formed when potassium reacts with nitrogen?
*December 6, 2010*

**science**

A 75-kg person on skis is going down a hill sloped at 30.0°. The coefficient of kinetic friction between the skis and the snow is 0.15. How fast is the skier going 10.0 s after starting from rest?
*December 5, 2010*

**algebra**

A*B=A*B Solve for B
*December 5, 2010*

**physics**

A 65 kg person runs with a horizontal velocity of 3.5 m/s and jumps onto an 0.9 kg skateboard which is initially at rest. Assuming negligible friction, what will be the final velocity of the skateboard and the person?
*December 3, 2010*

**physics**

An 85.0 kg fisherman decides to jump from his boat onto the dock. If the velocity of the fisherman is 4.30 m/s to the west and the boat is 185 kg, what is the velocity of the boat after the fisherman jumps out?
*December 3, 2010*

**physics**

A billiard ball traveling at 8.0 m/s has an elastic collision with a second billiard ball of equal mass that is at rest. After the collision, the first ball is at rest. What is the velocity of the second ball after the collision?
*December 3, 2010*

**physics**

a chunk of clay in the shape of Bugs Bunny has a mass of 0.75 and an initial velocity of 5.0 m/s to the right. a second chunk of clay is in the shape of Elmer Fudd has a mass of 0.25 kg and an initial velocity of 3.0 m/s to the left. what is the composite velocity ater the ...
*December 3, 2010*

**Math- HELP**

12/17 duh!
*December 2, 2010*

**chemistry**

Imagine that one carbon in buckminster- fullerene (C60) is replaced by a silicon atom,yielding SiC59. This molecule can then orient in 60 different ways. What is the entropy of one mole of SiC59 at T = 0 K? 1. 4.53 × 10−20 J/K 2. 27.3 kJ/K 3. 34.0 J/K 4. 5.65 &...
*November 30, 2010*

**Biomechanics**

If an average net force of 20N at 45* is applied to a 0.35 kg water balloon for 0.12s. how far away should the catcher stand? Assume release height and cathc height are the same and air resistance is not a factor.
*November 29, 2010*

**chemistry**

Thank you!!
*November 26, 2010*

**chemistry**

I have found a balanced redox equation for removal of silver sulfide using sodium hydrogen carbonate in aluminium to say: 2Al + 3Ag2S + 6H2O --> 6Ag + 2Al2(OH)3 + 3H2S What happens to the Na and C component of the sodium hydrogen carbonate? And why is it not included on LHS...
*November 26, 2010*

**JAVA SCRIPT**

What is the purpose of the modulus operator? Provide an example of when it can be used and the value that would be returned.
*November 26, 2010*

**ethics**

ok thank u so much!! :)
*November 22, 2010*

**ethics**

so what is a example?
*November 22, 2010*

**ethics**

Does your organization address ethical issues in a formal and systematic way? If so, is it a cookie-cutter, one-size-fits-all approach or has the organization customized an ethical culture to match its unique needs? Please provide examples. i dont have a job so how can do this?
*November 22, 2010*

**English**

Skeptics argued that the boss's UNORTHODOX management style would... im not sure how to! I know that unorthodox means disregarding or defying traditions or standards
*November 21, 2010*

**English**

Ske[tics argued that the noss's UNORTHODOX management style would...
*November 21, 2010*

**English**

With the election so near, the mayor became RETICENT about..... what could i write to finish the sentence?
*November 21, 2010*

**English**

1. to suppress with threat or force 2. to declare invalid
*November 21, 2010*

**English**

If the king fails to QUASH the rebel forces, they will... what could i write to finish the sentence?
*November 21, 2010*

**English**

incorrigible?
*November 21, 2010*

**English**

Thought to be _______, the criminal was sentenced to life without parole. 1.blasphemous 2.heretic 3.incorrigible
*November 21, 2010*

**Math**

Are the following fractions equivalent? justify your answer 18/24 9/12 15/20 6/9
*November 21, 2010*

**physics**

a 60 kilogram student sitting on a hardwood floor accelerates at 1.3 meters per second squared when pulled by a 240 newton horizontal force. what is the coefficient of friction between the student and the floor?
*November 21, 2010*

**COLLEGE**

yes under the cupboard
*November 21, 2010*

**12th Grade English**

wow poetry in motion
*November 21, 2010*

**Chemistry**

1e-7
*November 20, 2010*

**calculus**

Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees F during the first hour after death and about 1 degree F for each additional hour. Assuming an air temperature of 78 degrees F and a living body temperature of 98.6 degrees F, the ...
*November 18, 2010*

**C programming**

Help would be grately apreciated on this problem thank you! Backgound The employees can be any one of the two types: 1) Full-Time Salaried (FTS) and 2) Part-Time Hourly (PTH). Currently, there are totally 1050 FTS employees and 274 PTH employees in a company. The company plans...
*November 18, 2010*

**Computers C**

Backgound The employees can be any one of the two types: 1) Full-Time Salaried (FTS) and 2) Part-Time Hourly (PTH). Currently, there are totally 1050 FTS employees and 274 PTH employees in a company. The company plans to add up to 50 new employees FTS employees are paid in a ...
*November 18, 2010*

**calculus**

f(x,y)=x^2+2y^2 use the gradient vector Þf(5, 1) to find the tangent line to the level curve f(x, y) = 27 at the point (5, 1). answer choices: 1. 10x + 4y = 27 2. 2x + 4y = 27 3. 5x + 2y = 27 4. 10x − 4y = 27 5. 5x − 2y = 27
*November 17, 2010*

**calculus**

Use differentials to estimate the amount of tin in a closed tin can with diameter 6 cm and height 14 cm if the tin is 0.046 cm thick.
*November 17, 2010*

**arithmetic**

dude why do you put su hard question on here and nobody can do it
*November 17, 2010*

**geometry **

draw an acute scalene triangle ABC in the center of your paper with sides approximately 8cm 10cm and 16cm
*November 17, 2010*

**Math**

5 mins.
*November 16, 2010*

**4th grade math**

31 X 19 in expanded algorithm
*November 16, 2010*

**chem**

let's say that an average egg has a mass of 48 g. What mass would a mole of eggs have?
*November 16, 2010*

**chemistry**

Surface tension explains which of the follow- ing phenomena? I) A piece of aluminum foil floating on a lake II) A bowling ball sinking more slowly through molasses than through water III) Separating ethanol from water by distillation IV) Water beading on a windshield during ...
*November 14, 2010*

**math; distributive property;perimeter of a triangl**

4+4+3h+2
*November 14, 2010*

**Physics **

you use the mg-(2.3E2*cos21)for fnormal...bobpursley you really should check your work before...
*November 13, 2010*

**economics**

drop in output
*November 11, 2010*

**geomtry**

Figure it out
*November 11, 2010*

**physics**

How much spring elasticity would be needed to make a 50 pound child jump higher
*November 10, 2010*

**Physics**

17.4
*November 10, 2010*

**physics**

A bus traveling 85 km/hr is brought to a stop in 135 m. If the mass of the bus is 2250 kg, what was the retarding force provided by the brakes? Formula please
*November 9, 2010*

**Algebra**

Thank you
*November 8, 2010*

**Algebra**

why 32?
*November 8, 2010*

**Algebra**

4a/16 + a/16 =?
*November 8, 2010*

**1st grade**

the girls past was bad
*November 8, 2010*

**physics**

A man pushes on a piano of mass 180 so that it slides at a constant velocity of 12.0 down a ramp that is inclined at 11.0 above the horizontal. No appreciable friction is acting on the piano. Calculate the magnitude and direction of this push A. if the man pushes parallel to ...
*November 8, 2010*

**chemistry**

A propane barbeque is used to heat up 400g of water in an aluminum pot until it is boiling. Using the following information, calculate the molar enthalpy of propane. You can assume the temperature of the water and the temperature of the aluminum pot are always the same. ...
*November 7, 2010*

**chemistry**

A 10.0 g sample of liquid gallium metal, at its melting point, is added to 50.0g of water. The initital temperature of the water is 24.0 degrees C. If the molar enthalpy of freezing gallium is -5.54 kj/mol, what is the final temperature of the water? Thanks
*November 7, 2010*

**PHILOSOPHY**

What was William of Ockham's position on predestination? Where is a good sight to find imformation on this subject?
*November 7, 2010*

**math**

What are the measures of the angles of a right triangle with side lengths of 1, 2, and sqroot of 2? please show/explain work
*November 7, 2010*

**MATH**

a ball of radius 1 is dropped into a V-shaped gutter. The ball touches the gutter's sides at the ball's equator. If the shortest distance from the surface of the ball to the vertex of teh gutter is 1, what is the angle formed by the sides of the gutter?
*November 7, 2010*

**math**

a ball of radius 1 is dropped into a V-shaped gutter. The ball touches the gutter's sides at the ball's equator. If the shortest distance from the surface of the ball to the vertex of teh gutter is 1, what is the angle formed by the sides of the gutter?
*November 7, 2010*

**math algebra**

how would i do this problem elina and teresa raced on their bikes to the library after school. they both left at 3:00 pm and bicycled along the same trail elina rode at the speed of 12 miles an hour and teresa rode at the speed of 9 mph. elina got there 15minutes before teresa...
*November 4, 2010*

**calculus**

A rectangle is constructed with its base on the diameter of a semicircle with radius 5 cm and with two vertices on the semicircle. What are the dimensions of the rectangle with maximum area?
*November 4, 2010*

**calculus**

A square-based, box-shaped shipping crate is designed to have a volume of 16ft^3. The material used to make the base costs twice as much (per ft^2) as the material in the sides, and the material used to make the top costs half as much (per ft^2) as the material in the sides. ...
*November 4, 2010*

**chem**

A scuba diver's tank contains .25 kg of oxygen compressed into a volume of 4.3 L (for oxygen, 32g = 1 mole) Calculate the gas pressure inside the tank at 9 degrees Celsius What volume would this occupy at 26 degrees Celsius and .95 atmospheres? can someone tell me how many...
*November 2, 2010*

**chemisty help please**

I still don't get it.. lol
*November 2, 2010*

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