Sunday

May 29, 2016
Total # Posts: 392

**Chemistry**

What is the equation to show that boiling is a cooling process?
*January 10, 2013*

**Physics**

A weight is hung from the ceiling of an elevator by a massless string. under which circumstances will the tension in the cord be the greatest? smallest? a.) The elevator rises with decreasing speed b.) The elevator rises with increasing speed c.) The elevator is at rest d.) ...
*December 11, 2012*

**Physics**

... we havn't even learned about Kinetic energy yet... my teacher must be losing it.... haha
*December 5, 2012*

**More Physics**

I have NO idea how to do this! any help is great! A car with a mass of 1330kg is traveling at 28m/s. The driver applies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it gives me the Mass:...
*December 5, 2012*

**Physics**

A mouse pushes a piece of cheese with a mass of 6.4 g for a distance of 75 cm over a frictionless surface. He exerts a constant 0.5 N force as he does so. If the cheese starts from rest, what is it's final velocity? there is no time or speed givin, which throws me off
*December 5, 2012*

**Physics -movies**

There are many Hollywood movies which show a hero or villian running, jumping, or riding a motorcycle through big plate glass windows without apparent injury. Why is this an incredible violation of Newton's laws? i can't think of really anything that makes sense...
*December 5, 2012*

**Science ~conversions~**

oops. correction. the spider is pulling with .011N. NOT .001
*December 5, 2012*

**Science ~conversions~**

On my physics home work i have a question that puts the weight in grams, and i need to find the acceleration. I know that the formula is F=ma, and Force is in newtons, mass is in kg and acceleration is in m/s^2. but can you still find the acceleration by using grams with out ...
*December 5, 2012*

**Physics HELP!**

I have NO idea how to do this! any help is great! A car of maass 1330kg is traveling at 28m/s. The driverapplies the brakes to bring the car to a rest over a distance of 79m. Calculate the retarding force acting on the car. From this i can see that it gives me the Mass:1330kg ...
*December 4, 2012*

**College History**

Thank you again for your time
*November 30, 2012*

**College History**

I have quite a few that I couldn't figure out on my assignment. 1) The leading symbol of reforming state governments in rhe early 1900's was A) Theodore Roosevelt B) Woodrow Wilson C) Robert La Follette D) Upton Sinclair 2) Wilson's first dealings with Congress ...
*November 30, 2012*

**College History**

thank you!
*November 30, 2012*

**College History**

Which of the following was NOT a result of the great migration of blacks in the 1920s? A) Blacks found they someetimes were able to work in jobs that has been closed to them in the South. B) African American consciousness was raised, providing feelings of greater autonomy and ...
*November 30, 2012*

**Chemistry**

842.5
*November 14, 2012*

**Physics**

A person is riding a bicycle, and its wheels have an angular velocity of 17.7 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 12.4 revolutions. (a) How much time does it take for the bike ...
*October 30, 2012*

**Physics**

A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.2 x 1020 m, and the angular speed of the star is 4.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?
*October 30, 2012*

**chem**

How do you prepare a solution of 12 M HCl and want to prepare 500 mL of a 0.4 M solution. Assume you have a 500-mL volumetric flask
*October 16, 2012*

**math**

MEghan had 36 books in her locker. Some were library books, text books and the rest were telephone books. THe number of library books and phone books combined equals twice the number of text books. The number of text books and telephone books equals three times the number of ...
*September 30, 2012*

**visual**

"Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner. Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do ...
*September 15, 2012*

**visual**

"Street, Dresden", 1907, oil on canvas by Ernst Ludwig Kirchner. Describe the shapes in this painting. Are the shapes organic or geometric? Which ones? Describe how the shapes interact, or "touch" each other. Are the edges of the shapes soft or hard? Do ...
*September 15, 2012*

**PHYSICS**

A railroad diesel engine weighs 3.9 times as much as a freight car. The diesel engine coasts at 5.3 km/h into the freight car that is initially at rest. After they couple together, what is their speed?
*September 10, 2012*

**PHYSICS**

A railroad diesel engine weighs 3.9 times as much as a freight car. The diesel engine coasts at 5.3 km/h into the freight car that is initially at rest. After they couple together, what is their speed?
*September 10, 2012*

**math**

All you have to do is put 39 in for h. So you get 39=-16t+1444. And solve.
*September 6, 2012*

**algebra**

A tugboat goes 180 miles upstream in 15 hours. The return trip downstream takes 10 hours. find the speed of the tugboat without a current and the speed of the current
*August 9, 2012*

**english**

and i need to talk about the impression of the medical officer and Chaplain. thanks
*July 13, 2012*

**english**

yes, thats the editorial i have to do i also need to say how the writer managed to develop ideas that they present in the opening paragraph and talk about structural and linguistic devices.
*July 13, 2012*

**english**

With close reference to the text how successful is the headline in influencing the reader's view of the issue of hang? the title: THE WOMAN WHO HANGS TODAY
*July 13, 2012*

**Physics Angular displacement**

A school bus takes 0:53 hours to reach the schoool from your house. If the average speed of the bus is 19km/h, what is the displacement of the bus during the trip?
*July 1, 2012*

**Math Help**

It's not the 6th bounce? Because when I put 6 into the equation I got 5/9
*May 8, 2012*

**Math Help**

The end of a spring is pulled as far as it will go and then is released. On the first bounce back it extends 135 cm. On its second bounce back it extends 45 cm. On its third bounce back it extends 15 cm. How many times will the spring bounce back before it extends 5/9 cm? I ...
*May 8, 2012*

**Math**

The end of a spring is pulled as far as it will go and then is released. On the first bounce back it extends 135 cm. On its second bounce back it extends 45 cm. On its third bounce back it extends 15 cm. How many times will the spring bounce back before it extends 5/9 cm? I ...
*May 7, 2012*

**chemistry**

Ethylene glycol, C2H6O2, is used as antifreeze for automobile engines. If you want to produce 2.00 kg of ethylene glycol from the reaction of C2H4Cl2 and Na2CO3, what is the minimum amount of Na2CO3 that is needed? C2H4Cl2(l) + Na2CO3(s) + H2O(l)=C2H6O2(l) + 2NaCl(aq) + CO2(g)
*April 27, 2012*

**Math**

simplify the expression below,using the laws of exponents. (5^4 x 5^7)/ 5^8 Show your work. PLEASE HELP ME!
*April 15, 2012*

**physics**

Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act A)0.98N. B)62N C)44.5MN
*March 30, 2012*

**physics**

Use these magnitudes of the forces of gravity at Earth's surface to determine the masses of the objects on which they act A)0.98N. B)62N C)44.5MN
*March 30, 2012*

**physics**

Thanks
*March 30, 2012*

**physics**

What is the weight of each of the following masses at Earths surface? A) 25g. B)102kg. C) 12mg
*March 30, 2012*

**physics**

Each of the four wheels of a car push on the road with a force of 4.0*10^3 N [down]. The driving force on the car is 8.0*10^3 N [W]. The fictional resistance on the car is 6.0*10^3 [E]. Calculate the following A) the mass of the car B) the net force on the car C) the cars ...
*March 29, 2012*

**Pre-Algebra**

What is (41x + 67y) + (49x - 28y) simplified?
*March 13, 2012*

**chemistry**

A 20.0 mL sample of an aqueous HClO3 solution is titrated with a 0.0275 M KOH solution. The equivalence point is reached with 28.5 mL of the base. The pH of the HClO3 solution, before titration, is
*March 13, 2012*

**calculus**

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y and show that the mixed partial derivatives fxy and fyx are equal
*March 7, 2012*

**calculus**

find the second-order partial derivatives of f(x,y)=x^3 + x^2y^2 + y^3 + x+y and show that the mixed partial derivatives fxy and fyx are equal
*March 7, 2012*

**calculus**

find the domain of the function a) f(x,y) = e^(-xy) b) h,(u,v)= √(4-u^2 - v^2)
*March 7, 2012*

**International Buisness**

The marketing department is asked to formulate a strategy for disseminating product information on new drug Tigason. As the marketing manager what do you recommend?
*February 22, 2012*

**physics**

What is the speed in meters per second of a baseball traveling at 64 mph given that 1 mph = 0.447 m/s?
*February 2, 2012*

**social studies**

our teacher give us this topic to write an assay. I was told not to go to that place ,but I still went there. he told us that is a narrative essay but I don't understand this topic. can u help me ?
*January 25, 2012*

**Spelling**

Hello, my daughter has to alphabetize a list of words that also include multiple words. Example: anyway any way everyone every one already all ready I think the "one" word words should go first, followed by the "two" word words. Is this correct? Thanks!
*January 17, 2012*

**Language Arts**

I need some help. These are analogies from the Word Within a Word book; List 7: Pugilist is to Pugnacious as... mystagogue is to religious dermatologist is to dermatitis police is to police pedagogue is to pedant Pachyderm is is to Hypodermic as... pedagogue is to demagogue ...
*January 11, 2012*

**Chemistry**

Okay, I understand now, it's much easier than I was making it out to be! Thanks so much for your help!
*November 30, 2011*

**Chemistry**

What is wrong with these sets? Fix what's wrong: n=4, l=3, ml=4 n=2,l=-1, ml=1 I don't exactly even know what the question is asking!
*November 30, 2011*

**BUS 640 **

Bridget's choice - theory of consumer behavior
*November 28, 2011*

**physics**

A mass m is gently placed on the end of a freely hanging spring. The mass then falls 29.8 cm before it stops and begins to rise. What is the frequency of the oscillation?
*November 27, 2011*

**Physics**

A mass m at the end of a spring vibrates with a frequency of 0.936 Hz. When an additional 558 g mass is added to m, the frequency is 0.634 Hz. What is the value of m?
*November 27, 2011*

**Physics**

A mass sitting on a horizontal, frictionless surface is attached to one end of a spring; the other end is fixed to a wall. 5.5 J of work is required to compressed the spring by 0.16 m. If the mass is released from rest with the spring compressed, it experiences a maximum ...
*November 27, 2011*

**Physics**

A bungee jumper with mass 61.3 kg jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 31.8 s. He finally comes to rest 25.3 m below the level of the bridge. Calculate the spring constant of the bungee ...
*November 27, 2011*

**physics**

1)A fire hose held near the ground shoots water at a speed of6.5 mps At what angle should the nozzle point in order that the water land 2.5 meters away? Answers: 18 degrees and 72 degrees 2) A long jumper leaves the ground at 45 degrees above the horizontal and lands 8 meters ...
*November 22, 2011*

**geometry**

ABCD is a rectangle. If AC=5x+2 and BD=x+22, find x.
*November 20, 2011*

**Science**

How many families are found in the Phylum Arthropoda?
*November 9, 2011*

**math/ algebra?**

a lab technician draws a sample of blood. A cubic millitmeter of the blood contains 22^3 white blood cells and 22^5 red blood cells. What is the ratio of white blood cells to red blood cells?
*October 28, 2011*

**physics**

a cannonball is fired straight up at 60m/s. how long does the flight last?
*October 4, 2011*

**Algebra 1 (HELP PLEASE!!)**

The United States Mint reported at the end of 2006 that the unit cost of producing and distributing a penny was 1.21 c. What percent of the value of a penny is this cost? What can you conclude about the cost of making pennies? • How can a model help you to visualize the ...
*September 14, 2011*

**PHYSICS**

A gas cylinder contains a mixture of carbon dioxide and oxygen, which have different molecular masses. The contents of the cylinder are in thermal equilibrium. Which of the following statements is correct? Question 1 options: A) All carbon dioxide molecules and all oxygen ...
*August 16, 2011*

**PHYSICS**

The latent heat of fusion of water is 3.34 x 105 J/kg. A farmer places a barrel containing 1000 kg of water in his barn one winter's night. When the water cools to 0oC, it begin to freeze. How much heat does the water give out while it is freezing until it has all become ...
*August 15, 2011*

**Algebra**

I have to work out this equation for my college paper and I am having trouble understanding graphs, etc. The question is C=200+50 and C=300+25. Can anyone walk me through the steps on how to graph this?
*August 1, 2011*

**stats**

TABLE 1 The general manager of a chain of pharmaceutical stores reported the results of a regression analysis, designed to predict the annual sales for all the stores in the chain (Y) – measured in millions of dollars. One independent variable used to predict annual ...
*July 4, 2011*

**Physics**

Helium is supplied in pressure tanks. If I have a 10 liter tank at 200 atmospheres of pressure, how many 3 liter balloons can I fill? (Assume the balloons are at one atmosphere)
*May 12, 2011*

**Biology**

The number of oyster beds in Chesapeake Bay,which is an arm of the Atlantic Ocean,is dwindling rapidly.what effect would this have on the surrounding area?On the human community?
*May 10, 2011*

**College Chem**

Calculate the enthalpy change for the reaction NO(g) + O(g) --> NO2(g) from the following data: NO(g) + O3(g) --> NO2(g) + O2(g) ; ∆H = -198.9 kJ O3(g) --> 1.5O2(g) ; ∆H = -142.3 kJ O2(g) --> 2O(g) ; ∆H = 495.0 kJ
*May 8, 2011*

**Biology project**

THE EVOLUTION OF BARBELLUS Describe the type of food that the diffrent Barbellus spieces might have eaten. 1.caterpillar 2 and 3.type of fish
*April 20, 2011*

**Social Studies**

Was Blitzkrieg a successfull war stratagy?
*April 19, 2011*

**physics**

Consider a single photon of red laser light, with wavelength of 633 nm (nano is 10-9). What energy does this carry? What momentum? How does the energy compare to typical atomic energies of a few times 10-19 J?
*April 17, 2011*

**Biology**

Cellular slime molds begin life as a group of seperate organisms,or individuals.After congregation,they become a single multicellular individual.Describe what is meant by this statement.
*April 13, 2011*

**biology**

specialized cells in animals are all descended from a single ancestor cell.How are the specialized and the nonspecialized cells of the cellular slime molds related?
*April 13, 2011*

**English**

the mirror is an example of magic in the movie;they use it to see where belle's father is in the forest;also the fact that at the end true love saves the beast from the trajic spell and transforms into the handsome prince.
*April 13, 2011*

**social studies**

evaluate the following statement:canada's autonomy advanced in the first three decades of the twentieth century
*April 12, 2011*

**social studies**

evaluate the following statement:canada's autonomy advanced in the first three decades of the twentieth century
*April 12, 2011*

**spanish**

La hija tiene hambre
*April 2, 2011*

**Chemistry**

when sulfur is burned in the presence of oxygen, sulfur trioxide is produced. if 3.4 x 10^24 atoms of sulfur react, how many liters of sulfur trioxide are produced?
*March 17, 2011*

**physics**

680 N. If it were more of less, the man would fall through the floor. Hope this helps!
*March 16, 2011*

**Algebra 2 **

If a bicycle has a crankshaft of 40 teeth, and there are three rear sprockets attached to the rear wheel, 20 teeth, 16 teeth and 12 teeth. The diameter of the rear wheel is 60 cm. Which sprocket should be used to get the most distance in one paddle? What would the distance be?
*February 22, 2011*

**Algebra**

If a bicycle has a crankshaft of 40 teeth, and there are three rear sprockets attached to the rear wheel, 20 teeth, 16 teeth and 12 teeth. The diameter of the rear wheel is 60 cm. Which sprocket should be used to get the most distance in one paddle? What would the distance be?
*February 22, 2011*

**calculus**

Find the derivate of the function f(x) = 2x2 + 23x + 5 What is the value of this derivative when x = 19
*February 17, 2011*

**calculus**

Find the derivate of the function f(x) = 2x2 + 23x + 5 What is the value of this derivative when x = 19
*February 17, 2011*

**business calculus**

For the function f(x) = 18/(3x-14) determine the x-coordinate of any vertical asymptote
*February 10, 2011*

**calculus**

For the function f(x) = 1/(6x2+5x+16) determine if there is a vertical asymptotes
*February 10, 2011*

**calculus**

For the function f(x) = 18/(3x-14) determine the x-coordinate of any vertical asymptote
*February 10, 2011*

**calculus**

A function f(x) is said to have a removable discontinuity at x=a if: 1. f is either not defined or not continuous at x=a. 2. f(a) could either be defined or redefined so that the new function IS continuous at x=a. Let f(x)= x2+10x+26 2 −x2−10x−24 if x−5...
*February 7, 2011*

**calculus**

Consider the function f(x)=4x3+2x2+5, and let c be a number in the interval [01]. For what values of k is there a c in this interval such that f(c)=k?
*February 7, 2011*

**calculus**

On the graph of f(x)=3sin(2x), points P and Q are at consecutive lowest and highest points with P occuring before Q. Find the slope of the line which passes through P and Q.
*February 4, 2011*

**calculus**

A mass is oscillating on the end of a spring. The distance, y, of the mass from its equilibrium point is given by the formula y=6zcos(10wt) where y is in centimeters, t is time in seconds, and z and w are positive constants. (a) What is the furthest distance of the mass from ...
*February 4, 2011*

**child day care**

was this right answer. thanks
*February 1, 2011*

**child day care**

1,c 2,c 3,b, 4,c 5,c 6,a 7,a 8,d 9,c 10,c 11,c 12,b 13,c 14,a 15,d 16,c 17,b 18,c 19,b 20,b
*February 1, 2011*

**Math**

Thanks math helper but I am more lost than before since my choices for an answer are 25pi m2, 166.67pi m2,33.3pi m2, 100pi m2 I don't know what I am missing here. I am sorry to bother you.
*January 18, 2011*

**Math**

Can someone please help me with my math homework problem? My mom tried but she doesn't understand it. What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?
*January 18, 2011*

**Spanish**

si,lo puedo ver pero donde esta? i am a fluent speaker of spanish,italien,and portugeese i lived in central america
*January 12, 2011*

**AP Calculus AB**

1. assign x and y values to the length and width of each box within the pens, and use the formula 600=9x+8y to isolate the y value (i got the 8 and 9 by counting the number of length and width values existed in the diagram) you should get y=(600-9x)/8 2. then, since they asked...
*December 12, 2010*

**chemistry**

a mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume as the original mixture, calculate the mole fraction of the gases.
*December 4, 2010*

**business**

While waiting outside a meeting room, you notice that the next middle manager making a presentation is rehearsing what he will say. The pants zipper of his blue suit is open and part of his white shirt is protruding
*November 28, 2010*

**business**

You know that you have only $110 left before you hit the limit on your credit card, and you have $8 in your wallet. You are the host to three clients. One has just announced that he is considering the lobster dinner for $40. The other two clients nod their heads.
*November 28, 2010*

** business**

A colleague, an amateur pilot, shows up at a critical meeting with some Japanese executives wearing a tie adorned with pictures of a P51D Mustang escorting a B-29 Superfortress (the Mustang is a World War II fighter and the Superfortress is the type of plane that dropped the ...
*November 28, 2010*