Wednesday

April 1, 2015

April 1, 2015

Total # Posts: 530

**College Chemistry **

If you leave a glass of tap water out long enough, the water will evaporate and leave behind a white solid. Is this a chemical or physical change?
*September 10, 2010*

**College Chemistry **

A plant grows. Is that a chemical or physical change?
*September 10, 2010*

**College Chemistry **

Is this a physical or chemical change?
*September 10, 2010*

**College Chemistry **

If you leave a glass of tap water out long enough, the water will evaporate and leave behind a white solid.
*September 10, 2010*

**College Chemistry **

When you bake cake batter it solidifies. Is this a physical or chemical change?
*September 10, 2010*

**College Chemistry **

When two solutions are mixed, small bubbles are formed. Is that a chemical or physical change?
*September 10, 2010*

**College Chemistry **

Also something i forgot to add while posting this question. The 0 and 28 are in degrees Celsius and the ice cube tray which the water is held in has 925 grams of water
*September 8, 2010*

**College Chemistry **

If the water initially has a temperature of 28, how many kilojoules of heat must be removed to cool and freeze the water at 0?
*September 8, 2010*

**math**

evaluate. 8 1⁄4 - 6 15⁄32 i got 2 7/32 is this correct. if not what am i doing wrong.
*June 16, 2010*

**math**

Marco is making a scale drawing of a building. The scale for the drawing is 1 inch = 7 feet. The height of the building in the drawing is 1 foot. Determine the height of the actual building. Someone please help me.
*June 16, 2010*

**Math**

(7.66 • 10^2)(6.29 • 10^-4) answer then convert to scientific notation. the answer I keep getting is 0.481814 the scientific notation I get from this is 4.81814*10^5 but i keep getting it wrong. Can someone please help me.
*June 16, 2010*

**Math**

Multiply or divide and write scientific notation for the result. (7.66 • 10^2)(6.29 • 10^-4) can someone please help me with this.
*June 13, 2010*

**PreAlgebra**

Convert to decimal notation. 3.73 • 10^-4= -37300 Im not good with intergers. I just needed to know if this was correct. If not can someone explain it to me.
*June 13, 2010*

**PreAlgebra**

Convert to decimal notation. 5.585 • 10^6= 55,850,000 I need to know if this is correct? If not how do you do this? Thanks
*June 13, 2010*

**PreAlgebra**

Write an equivalent expression using negative exponents. 1/3^9 will i write this as 3^-9. please explain this to me.
*June 13, 2010*

**Math**

I have no clue what this means. Can someone explain this to me. Evaluate t^1
*June 12, 2010*

**Math**

Someone please help me. I have no clue where to start. 1. My family and I went to Applebee's for dinner. The price for the meal for all of us was $73.49. How much will a 15% tip be? What will be the total amount paid including tip? 2. My insurance commission rate is 12%. A...
*June 8, 2010*

**Algebra**

find a function f is given by f(-4) = 4x^2-3+7
*June 3, 2010*

**algebra**

this is how I would do this one 8=2x -3 8-8= 2x -3 -8 0 =-11 + 2x -2x = 11 + 2x -2x 2x = -11 2x/2 = 11/2 x=11/2
*June 3, 2010*

**Math**

My family is having a reunion today, I have to make enough banana pudding for 65 people. How many bananas at .59 a pound do I need. (I have no idea where to start or what to do. Can someone explain this to me?)
*May 31, 2010*

**Math**

Solve the problem. Round to the nearest unit. 584 is 12.2% of what? I got 47.868852459016 (on the calculator) Just wanted to know if I rounded to the nearest unit correctly. When I rounded I got 4787?
*May 29, 2010*

**Math**

Find the simple interest. Round your answer to the nearest cent. Principal = $900 Rate = 4% Time in years = 3 Is this correct: 900*0.04=36 36*3=108.00 Then my next question is when you round to the nearest unit is it the same as regular rounding. 335.42 rounded to the nearest ...
*May 29, 2010*

**Math**

Solve the problem. Round to the nearest unit. 161 is 48% of what? A. 33,500 B. 3350 C. 335 D. 3
*May 29, 2010*

**11th grade chemistry**

what is the concentration in parts per million of a water sample that contains 4g of Hg in 200g of water?
*April 13, 2010*

**math**

The terminal side of theta is in Quadrant III and lies on the line y = 2x. What are the 6 trig functions?
*April 12, 2010*

**Math**

Line m is perpendicular to plane A. how many planes can contain line m and alo be perpendicular to plane A? I think it my be infinite?
*April 1, 2010*

**University Physics II**

A 13.9 nC charge is located at position (x,y) = (1cm,2cm). A. At what (x,y) position is the electrical field -225,000i_hat N/C? B. At what (x,y) position is the electrical field (-161,000i_hat + 80,500j_hat) N/C? C. At what (x,y) position is the electrical field (-21,600i_hat...
*March 23, 2010*

**English**

I think it's perfect!
*February 24, 2010*

**biology**

Smooth edged leaves (S) dominant over rough edged leaves (s). Two plants heterozygous for smooth edged leaves are crossed. What proportion of the offspring are expected to be smooth edged leaves? a. 1/4 b. 1/2 c. 3/4 d. 1
*February 23, 2010*

**biology**

What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface
*February 23, 2010*

**pre cal**

how do you determine the domain of the variable in the expression x-6 over 5-x?
*February 8, 2010*

**chemistry**

By means of what single reagent could you distinguish between the following? (Tell what happens to each substance.) Solutions: AgNO3 and Zn(NO3)2 H2SO4 and HNO3 Ag(NH3)2Cl and AgNO3 Solids: AgCl and ZnCl2 AgCl and Hg2Cl2 PbCrO4 and K2CrO4
*February 4, 2010*

**algebra**

Jack usually mows his law in 5 hours. Marilyn can mow the same law in 6 hours. How much time would it take for them to mow the lawn together?
*February 1, 2010*

**I.T**

what would you need to do in order to legally use the pictures from a websight?
*January 20, 2010*

**Physics**

To find the velocity and acceleration vectors for uniform circular motion and to recognize that this acceleration is the centripetal acceleration. Suppose that a particle's position is given by the following expression: r(t) = Rcos(omega*t)i + Rsin(omega*t)j Velocity ...
*November 13, 2009*

**math**

What about the ceiling, Should you add another 15x19 area then divide by 78.2 to get the amount of gallons needed?
*November 11, 2009*

**HCR220**

HCR 220 week 6 Applying Level II HCPCS Modifiers can anyone help with this
*November 2, 2009*

**Physics**

A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.2 m/s at ground level. Its engines then fire and it accelerates upward at 4.20 m/s2 until it reaches an altitude of 960 m. At that point its engines fail, and the rocket goes into ...
*October 11, 2009*

**Physics**

A motorist drives along a straight road at a constant speed of 16.5 m/s. Just as she passes a parked motorcycle police officer, the officer starts to accelerate at 3.50 m/s2 to overtake her. Assume that the officer maintains this acceleration. (a) Determine the time it takes ...
*October 11, 2009*

**physics**

As soon as a traffic light turns green, a car speeds up from rest to 50.0 mi/h with a constant acceleration of 9.90 mi/h·s. In the adjoining bike lane, a cyclist speeds up from rest to 20.0 mi/h with a constant acceleration of 13.5 mi/h·s. Each vehicle maintains ...
*October 11, 2009*

**physics**

To solve for the first part, I got time = 2.89 seconds, but then it shows that I got the wrong answer?
*October 11, 2009*

**physics**

A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 15.0 m/s, and the distance from the limb to the level of the saddle is 3.50 m. (a) What must be the horizontal distance between the ...
*October 11, 2009*

**english**

Can someone write a harvard outline for me. I have no clue what to do. Discuss how color, music and setting was used effectively and thematically in the M.T.V version of Romeo and Julie. How did the actors make this real for you.
*October 4, 2009*

**english**

I dont know what to write for a harvard outline of romeo and juliet mtv version. Discuss how color, music and setting was used effectively and thematically in Romeo and Juliet. How did the actors make this movie real for you.
*October 4, 2009*

**4th grade**

(math) find a rule. writhe the rule as an equasion. use the equasion to extend the pattern.
*October 1, 2009*

**criminology**

I was wonderingif I could get some guidence in finding a site on crime committed based on the socail structure theory?
*July 28, 2009*

**Networking**

I need help with these questions 1. You are the network administrator for a company that has peer-to-peer network. How would the pieces and components of this network relate to each other? Define all the components of this type of network. 2. You are the administrator of a ...
*July 17, 2009*

**analysis and design**

thanks for nothing
*June 20, 2009*

**analysis and design**

My project is upgrading a bathroom and this is what I need help with: Project Risk-list 5 factors and their potential impact for the project. Project Constaints-ex: triple constaints variable (cost,time/schedule and scope)are there any possible limitations list all that apply...
*June 20, 2009*

**analysis and design**

5.2 Project Risks [Use this section to list at least five risks factors and their potential impacts for the project.] # Risk Area Likelihood Risk Owner Project Impact-Mitigation Plan 1 [Project Risk] [High/Medium/Low] [Replace this text with a description of the Mitigation ...
*June 20, 2009*

**Accounting**

Lear, Inc. has $800,000 in current assets, $350,000 of which are considered permanent current assets. In addition, the firm has $600,000 invested in fixed assets. a. Lear wishes to finance all fixed assets and half of its permanent current assets with long-term financing ...
*June 16, 2009*

**Accounting**

Can anyone tell me if one of these is correct? Lear, Inc. has $800,000 in current assets, $350,000 of which are considered permanent current assets. In addition, the firm has $600,000 invested in fixed assets. a. Lear wishes to finance all fixed assets and half of its ...
*June 16, 2009*

**Accounting**

Healthy Foods, Inc., sells 50-pound bags of grapes to the military for $10 a bag. What is the degree of combined leverage at both sales levels? Chapter 5 page 144 problem 13 in Foundations of Financial Management. This is what I have so far can you tell me if this is correct? ...
*June 11, 2009*

**Accounting-business**

Healthy Foods, Inc., sells 50-pound bags of grapes to the military for $10 a bag. What is the degree of combined leverage at both sales levels? Chapter 5 page 144 problem 13 in Foundations of Financial Management. This is what I have so far can you tell me if this is correct? ...
*June 11, 2009*

**IT**

that did not answer my question I need to know how to do this
*May 27, 2009*

**IT**

Use Microsoft® Project to develop a Work Breakdown Structure (WBS) for your project defined in Week 2. Include a 100- to 150-word description of how and why you would use a WBS in a project. · Post your completed WBS and my project is on upgrading a bathroom I have ...
*May 27, 2009*

**IT**

â—‹ Collaborative discussion clusters will be assigned. â—‹ Each cluster will choose one project from the list below. â—‹ Discuss the elements included in a SDLC with your cluster as they relate to your selected project. â...
*May 19, 2009*

**IT**

I need to create a sample plan on remodeling a bathroom this is for class IT 221N Analysis and Design Information Systems
*May 19, 2009*

**Chemistry**

SO3 can be produced in the following two-step process: FeS2 + O2 ---> Fe2O3 + SO2 S02 + O2 ----> SO3 Assuming that all the FeS2 reacts, how many grams of SO3 are produced when 20.0 g of the FeS2 reacts with 16.0 g of O2?
*April 28, 2009*

**science**

what are the different forms of a trait that a gene may have called?
*April 2, 2009*

**college: western Literature**

I have a paper to write on a modest proposal. Here is the actual assignment. in a 3-5 page essay, defend and support the idess Swift proposed in "A Modest Proposal". You must include modern examples and experience to develop your ideas as well as include discussions ...
*February 3, 2009*

**Grade 11 chemistry**

Describe why the incomplete combustion of a hydrocarbon in an enclosed area can be dangerous.
*January 4, 2009*

**physics**

The pressure in a constant-volume gas thermometer is 0.700atm at 100 deg. Celsius and 0.512atm at 0 deg. Celsius. a) What is the temperature when the pressure is 0.0550atm? b)What is the pressure at 500 deg. Celsius?
*December 2, 2008*

**math**

How did you get 10/24? Are you adding the fractions by useing the lease common denominator?
*November 16, 2008*

**math**

How did you get 10/24 then 24/10?
*November 16, 2008*

**math**

I have trouble solving word problems. Can you help me solve this problem? If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take both of them to paint the house together?
*November 16, 2008*

**math**

I have trouble solving word problems. Can you tell me the best approach to solve this word problem? If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for both of them to paint the house together?
*November 16, 2008*

**geometry**

A RULE THAT IS ACCEPTED AS A PROOF IS CALLED A_____? (A) THEOREM (B) POSTULATE (C) AXIOM (D) A AND B
*October 22, 2008*

**chemistry**

i need 3 types of suspensions found in a science lab
*October 10, 2008*

**english**

Eliminate five letters from the word below to find one familiar word in the English language: FHIEVLEILCEOTPTTEERRS
*October 7, 2008*

**Economics**

How has today's economy affected the airline industries?
*October 5, 2008*

**math**

My thousands digit is twice my hundreds digit. The sum of my tens and ones digit is my thousands digit. My hundreds digit is 2 more than my tens digit. My tens digit is greater than 1 and less than 3. What 4 digit number am I?
*September 29, 2008*

**GCSEbiology**

explain how the srtucture of a sensory neurone allows it to do its job
*September 5, 2008*

**Biology**

Which organism is a third-order heterotroph? To what trophic level does that organism belong?
*September 3, 2008*

**Science**

Where is lantana located?
*July 11, 2008*

**math-116 final is it a timed test?**

The test is available at the beginning of the week and not due till sunday, so it looks like a week is your time limit.
*June 22, 2008*

**Technology**

What if the company has a centralized computer system but needs to outfit its employees with computers. Would it be safe to say that they should purchase laptop for all their traveling employees with a wireless card to allow them access to company programs and email while ...
*June 6, 2008*

**Technology**

Say you have a financial consulting corporation that has four satellite offices in the US and employs 300 fulltime employees and 20 of those travel 2 to 4 days a week. These 20 employees do not have access to email or other company programs while they are traveling. The ...
*June 6, 2008*

**history**

HH is stamped on the underneath on the inside of the ring on the silver. Stone is set in middle of the setting as a single stone.
*June 1, 2008*

**history**

I have a turquiose ring, round stamped with what I believe to be HH. The first H is very clear although the second letter almost looks like a mistrike H, could be a worn F, E, etc... what do the letters mean??? There are no purity markings that I can see.
*June 1, 2008*

**English**

Thank you
*April 27, 2008*

**English**

pronouns 16a. Anyone who requests a copy of the game may have it for their video library. 16b. Anyone who requests a copy of the game may have it for his or her video library. My answer is B. what type of pronoun is this? Thanks
*April 27, 2008*

**English**

16a. Anyone who requests a copy of the game may have it for their video library. 16b. Anyone who requests a copy of the game may have it for his or her video library. What type of pronoun is this?
*April 27, 2008*

**english**

Thank you.
*April 13, 2008*

**English**

I chose "B" as my answer to this question. Hope I'm right!!
*April 13, 2008*

**english**

Officials are considering placing the sturgeon on the endangered species list. If such an action is taken, ships, including those that carry goods and produce, will not be allowed to travel on the large rivers in our region that serve as breeding grounds for the fish. If ship ...
*April 13, 2008*

**criminal justice**

Explain the Correctional Officer subculture. How does this subculture create ethical issues for correctional officers?
*April 1, 2008*

**AP PHYSICS**

A 3.0-uF capacitor and a 4.0-uF capacitor are connected in series across a 40.0-V battery. A 10.0-uF capacitor is also connected directly across the battery terminals. Find the total charge that the battery delivers to the capacitors. I NEED HELP WITH THIS PROBLEM. THANKS!
*April 1, 2008*

**AP PHYSICS**

An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.29*10^.11m. What is the change in EPE(electric potential ...
*March 26, 2008*

**algebra**

Thank you.
*March 21, 2008*

**algebra**

I would choose a - the equation has two imaginary soluations. Is this right?
*March 21, 2008*

**algebra**

For the following equation, state the value of the discriminant and then describe the nature of the solutions. -2x^2+3x-7=0 What is the value of the discriminant? Which one of the statements below is correct? The equation has two imaginary solutions. The equation has one real ...
*March 21, 2008*

**algebra final, please help**

This is what I came up with for a final answer {x straight up and down line-17<x<-8 or x>20}
*March 21, 2008*

**algebra final, please help**

Solve (x+17)(x-20)(x+8)>0 The solution set is (x )? Use at least one inequality or compound inequality to express your answer. For answers with more than one inequality, separate the inequalities by a comma or the word 'or'. Type R is the answer is all real numbers...
*March 21, 2008*

**algebra**

Find the greatest common factor for the group of terms -30a^2,5a^4 Would the answer be 5a^2?
*March 21, 2008*

**algebra help please**

Thank you. I thought I was loosing my mind.
*March 19, 2008*

**algebra help please**

Factor 72-17v=v^2
*March 19, 2008*

**this one is throwing me in algebra**

Factor completely 49w^2+81-126w (7w+ )(7w- )
*March 19, 2008*

**last week of algebra**

Factor s^2+4s+4 (s+ 1 )(s+ 4) This doesn't seem right.
*March 19, 2008*

**algebra final, please**

Evaluate the polynomial for x=2 2x^2-4x+2=2*(2)^2-4*(2)+2 =2*4-4*(2)+2 =8-4*(2)+2 =8-(8)+2 =18 Am I right or wrong?
*March 18, 2008*

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