Recent Homework Questions About Computer Science
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science
2 liters of water at 80.c is found into a plastic bucket containing 10 liters of water at 20.c what is the final temperature of water ( density of water 1kg/litre) (neglect the heat gained by bucket and specific heat capacity of water = 1cal/gm.c ?
Friday, August 24, 2012 at 1:29am
English
Our class does an experiment for science. One pot gets no water. Have to identify the subject of each sentence. 1. class 2. pot
Friday, August 24, 2012 at 12:57am
Science
a .5kg ball is dropped from a 30m high building is on the ground for 2ms then bounces up 20m. What avg force was exerted on the ball?
Thursday, August 23, 2012 at 9:44pm
physical science
displays in formation in rows and columns
Thursday, August 23, 2012 at 7:15pm
Science
Imagine you are a plant. How are you and your cells different than animals. 1/2 - 3/4 page
Thursday, August 23, 2012 at 5:23pm
Science
I have this last question left and I'm stuck!!! Explain how cell organelles are similar to a factory. Must be 1/2 a page.
Thursday, August 23, 2012 at 4:44pm
science
Two simple pendulum each of length 5cm and time period of 4 second and 6 second starts oscillating one from left extreme and the other from right extreme. When will the two bodies be at the same phase?
Thursday, August 23, 2012 at 10:08am
Science
if a radioactive isotope has a half-life of one year, how much of the original sample will be left at the end of the second year?
Thursday, August 23, 2012 at 9:59am
Science
if a radioactive isotope has a half-life of one year, how much of the original sample will be left at the end of the second year?
Thursday, August 23, 2012 at 9:53am
Science, Astrenomey
This is my theory, read well if you wish to know the truth: according to the big bang, there is a equal amount of anti-matter to the matter, BUT nearly all that matter is missing! In this theory there was NO anti-matter when the earth was made. anti-matter is made when ...
Thursday, August 23, 2012 at 9:45am
Science
What part of the microscope does the fine adjustment knob move?
Wednesday, August 22, 2012 at 7:42pm
General Computer Science
Why should IT policy and control be a prime concern to overall management in the selection and development of IT management?” Please write an answer to the above question.
Wednesday, August 22, 2012 at 5:54pm
General Computer Science
There are several interior routing protocols. Is there a place for each one of them? Discuss in what type of network each one would work best.
Wednesday, August 22, 2012 at 4:59pm
Science
In what ways are there three processes similar in terms of the starting materials and end products?
Wednesday, August 22, 2012 at 7:54am
Science
What type model would you use to study an earthquake?
Wednesday, August 22, 2012 at 7:39am
science
suppose you want to find out about boiling points of different liquids: describe how you could go about finding the information.
Tuesday, August 21, 2012 at 10:47pm
Science.
You are carrying a 3.4 gallon jug full of cold water. Given that the water has a density of 1.0 grams per milliliter, and one gallon is equal to 3.8 liters, state the mass of the water in kilograms.
Tuesday, August 21, 2012 at 10:14pm
Science.
Assume a typical hummingbird has a lifespan of 4.0 years and an average heart rate of 1300 beats per minute. (a) Calculate the number of times a hummingbird's heart beats in its life, and express it in scientific notation. Use 365.24 days per year. (b) A long-lived ...
Tuesday, August 21, 2012 at 10:11pm
Science.
Sara has lived 18.0 years. How many seconds has she lived? Express the answer in scientific notation. Use 365.24 days per year for your calculations.
Tuesday, August 21, 2012 at 10:11pm
Science.
An atom of uranium-235 has a mass 235.043924 amu (atomic mass units). Using scientific notation, state the mass in amu of ten million such atoms.
Tuesday, August 21, 2012 at 10:11pm
Science.
Express 0.0000000000375 in scientific notation
Tuesday, August 21, 2012 at 10:10pm
science
1.How many meters away is a cliff if heard one half second after the original sound? Assume that sound travels at 343m/s on that day
Tuesday, August 21, 2012 at 4:18pm
Science
9. Which one of the following statements is characteristic of liquid water? A. It has a definite shape but not a definite volume. B. It has neither a definite shape nor a definite volume. C. It has a definite volume and a definite shape. D. It has a definite volume but not a ...
Tuesday, August 21, 2012 at 3:22pm
science
Ann drove to the store 10 km north of her house and then drove to the library, which is 5 km south of the store. She drove a total distance of 15 km. What was Ann's displacement?
Tuesday, August 21, 2012 at 11:57am
science
A ball is thrown upward to 80m high, ball will be 2times at 80m during the interval of 6sec, accelaration -10 and find velocity?
Tuesday, August 21, 2012 at 5:01am
science
What is the egg-laying part of some female insects?
Tuesday, August 21, 2012 at 3:37am
science
What is a larva?
Tuesday, August 21, 2012 at 3:36am
4th grade science
What is a silk case covering the moth larva?
Tuesday, August 21, 2012 at 3:33am
science
A ball is thrown upward to 80m high, ball will be 2times at 80m during the interval of 6sec, accelaration -10 and find velocity?
Tuesday, August 21, 2012 at 3:13am
science
What is the tiny hairs of hearing and sensing of an insect body?
Tuesday, August 21, 2012 at 2:59am
7th Grade Science
What can be inferred after performing the experiments in the atomic theory lab? A) Where matter comes from B) How salt is formed C) If salt can dissolve in water D) If matter is created or destroyed Is it D?
Tuesday, August 21, 2012 at 1:48am
computer science
1.Two supplementary angles differ by 44 degrees. Find The answer? 2.Two complementary angles differ by 9 degrees. Find the answer?
Monday, August 20, 2012 at 1:31pm
Science (Microscope)
Explain why some parts are in focus and some part are out of focus when you are trying to focus an object under the microscope.
Sunday, August 19, 2012 at 1:47am
Science
Why is it that you cannot use the largest objective for some slides?
Sunday, August 19, 2012 at 1:32am
math
every math class at super fun time high school has 31 students and every science class has 18 students. the school offers 4 more math class than sciencs. if the school has 418 students, how many of each class does the school offer.
Saturday, August 18, 2012 at 8:57pm
Science(Chemistry)
HCL+Al=AlCl3+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?
Saturday, August 18, 2012 at 7:44am
Science(Chemistry)
Explain what would happen when bromine water is added to potassium iodide solution and what is its balanced chemical equation?
Saturday, August 18, 2012 at 7:38am
Science(Chemistry)
Mg+H2O=MgOH+H2 What is the ionic equation,the spectator ions and the overall or net ionic equations?
Saturday, August 18, 2012 at 7:32am
Science
When you are focusing an object under the microscope, explain why some parts are in focus and some part are out of focus?
Saturday, August 18, 2012 at 2:04am
Science - Chemistry
What happens when you mix Sodium Bicarbonate, Bromothymol blue, and Calcium Chloride? What is Bromthymol blue used for in this experiment?
Friday, August 17, 2012 at 5:53pm
Science
What is matter?
Friday, August 17, 2012 at 7:32am
science
four bodies of mass 1kg, 2kg,3kg, and 4 kg are situated at four corners of a square of side 2m, take the origin at the center of square. find m.i. if the system passing through the centre and perpendicular to the plane of square
Friday, August 17, 2012 at 3:55am
science
3ml of 2M NaOH is added to 27 ml of destilled water. what dilution is made? what is the concetration of Naoh in the dilution?
Thursday, August 16, 2012 at 10:02pm
Science (Physics)
1. Which of the following is the fastest speed? Show your working. (a) 60 km/h (b) 15 m/s (c) 1.1 km/min
Thursday, August 16, 2012 at 5:00am
speedway
What are 25 action words that relate to science?
Wednesday, August 15, 2012 at 6:50pm
science
Which Windows feature allows you to personalize your computer system? A. My Pictures C. Default Programs B. Control Panel D. Computer
Wednesday, August 15, 2012 at 3:08pm
science
Which one of the following describes how to access your local disk in Windows XP? A. Click Start and click Control Panel. B. Click Start and click My Computer. C. Right-click on your desktop. D. Click Start and All Programs.
Wednesday, August 15, 2012 at 3:07pm
science
In Vista and Windows 7, which process allows you to display two documents side by side? A. Click the Windows button, choose Control Panel, and select the Tile Windows Vertically option. B. Right-click the mouse button in a blank area of the taskbar; in the menu option that ...
Wednesday, August 15, 2012 at 3:06pm
science
In Vista and Windows 7, which process allows you to change the desktop background? A. Click the Start button, choose Control Panel, and select Display Properties. B. Right-click on the desktop; in the menu that appears, select Display Properties. C. Click the Windows icon/...
Wednesday, August 15, 2012 at 3:05pm
science
In Vista and Windows 7, which process allows you to change the desktop background?
Wednesday, August 15, 2012 at 3:04pm
robotics
I need to incorporate in a summary the author, when the article is written and where is the article taking place. The article is "Robotics" World of Computer Science. Gale, 2002
Wednesday, August 15, 2012 at 12:30pm
animal science
Which of the following is true of the function of glucagon? A. Glucagon regulates insulin secretion. B. Glucagon increases glycogen breakdown into glucose. C. Glucagon inhibits glycogen breakdown into gluclose. D. Glucagon regulates somatostatin secretion.
Wednesday, August 15, 2012 at 11:37am
Science
1. Find the lattice parameter of pure iron at room temperature. 2. What is the ratio of the lattice parameter of the iron to the wavelength of the radiation used. 3. What is the value of two theta for the second peak? 4. By what factor is the lattice parameter of the Fe bigger...
Wednesday, August 15, 2012 at 12:21am
math
in order to purchase a computer for the student activities office, the freshman class decides to raise 1/3 of the money and the sophomore class decides to raise 1/2 of the money. The student government association agrees to contribute to the rest which amounted to $400.what ...
Tuesday, August 14, 2012 at 5:32pm
science
hi i have 500g Cu,befor i prepeared 80g/1lit H2SO4 for 50 g Cu,now for 500gr Cu How much need H2SO4? thanks my dear
Tuesday, August 14, 2012 at 6:29am
science
girl throws the ball with a certain angle. It covers maximum horizontal distance R. How much height ball reaches if she throws the same ball vertically upward? Assume her muscles give the ball same speed in each case.
Tuesday, August 14, 2012 at 12:54am
Science 2
How does TCDD act as an endocrine disruptor?
Monday, August 13, 2012 at 10:13pm
Science
What happens when TCDD binds to the AhR receptor? How does it cause diseases/health problems in people?
Monday, August 13, 2012 at 10:13pm
science(Ms.Sue)
Both owls and hawks live in the same ecosystem.they both hunt and kill mice, voles and rabbits.how can both types of predators find enough food in the same ecosystem? a)they are active in different areas. b)they are active at different times. c)they cooperate to only catch ...
Monday, August 13, 2012 at 8:24pm
Science
what does LD50 stand for in science terms?
Monday, August 13, 2012 at 6:36pm
Science/Check
Testable statement or prediction..... Is That Hypothesis?
Monday, August 13, 2012 at 5:57pm
Science
How gravitational acceleration is used to benefit mankind and the environment. How can rural people also benefit from thr use of gravitational acceleration?
Monday, August 13, 2012 at 3:18pm
Science
What happens when TCDD binds to the AhR receptor? How does it cause diseases/health problems in people?
Monday, August 13, 2012 at 3:01pm
Science
Who is the author of this article Where is the article taking place? When was the article written: This is the article: "Robotics" World of Computer Science. Gale, 2002.
Monday, August 13, 2012 at 2:02pm
science
What is the authors purpose and main idea in this article: "Robotics" World of Computer Science. Gale, 2002.
Monday, August 13, 2012 at 1:35pm
science
how many ml distilled water is required to prepare 2% sucrose solution from 2% 2liter sucrose solution from 20% sucrose solution?
Monday, August 13, 2012 at 9:12am
science
A bowling ball weighing 71.3 is attached to the ceiling by a rope of length 3.77 . The ball is pulled to one side and released; it then swings back and forth as a pendulum. As the rope swings through the vertical, the speed of the bowling ball is 5.00 .
Monday, August 13, 2012 at 6:04am
Science
Would "boy" consider a trait?
Monday, August 13, 2012 at 12:13am
science
Think about the impact that two (2) of your meals have on our world from an ecological and economic perspective. You can pick breakfast, lunch or dinner, and then answer the following questions
Sunday, August 12, 2012 at 10:13pm
English III
Hi it's me again! Could someone proofread this for me? Thanks so much! HOW ABOUT BETTER PARENTS? BY: Thomas L. Friedman In Thomas L. Friedman’s column “How About Better Parents” he discusses parent’s influence in their child’s education. He states ...
Sunday, August 12, 2012 at 10:03pm
Life Science
Fungi are classified into how many groups?
Sunday, August 12, 2012 at 7:12pm
Biology/HELP
Contrast the role of research in science and pseudoscience...??!! #LOST
Sunday, August 12, 2012 at 3:30pm
English
Adrian saw his friend Bob walking fast down the hall. What is the adverb and pronoun in this sentence? The adverb in this sentence: Soon the computer store will be closed.
Saturday, August 11, 2012 at 6:31pm
science
how do we calculate lateral load of a motorized ladder which carries 250 kg load to a height of 13 mtr at an angle of 70 degree
Saturday, August 11, 2012 at 6:00am
computer science
What exactly do computer scientists do?
Saturday, August 11, 2012 at 4:11am
math
28 students,all of whom study either science,language or both.18 students study language and 14 study science.how many students study acience and language? and how many study only science?
Saturday, August 11, 2012 at 3:37am
math
there are 28 students,all of whom study either science,language or both,18 students study language and 14 study science.How many students study science and language?
Saturday, August 11, 2012 at 3:33am
Science
How is water important to living things
Saturday, August 11, 2012 at 2:30am
Science Biology
What happens when TCDD binds to the AhR receptor? How does it cause diseases/health problems in people?
Friday, August 10, 2012 at 7:13pm
science
A soccer ball is kicked with an initial speed of 8.4 m/s in a direction 22.0° above the horizontal.Find the magnitude and direction of its velocity at the following times. (Take the +x axis to be parallel to the ground, in the direction that the ball is kicked.)0.250 s ...
Friday, August 10, 2012 at 6:45pm
Accounting
Hello I am not angry with you at all, however is there any way possible that you can help me with these two problems and we can call it even? Just let me know I am not trying to get over, however my computer had crashed and I am behind in class I purchased me a new laptop a ...
Friday, August 10, 2012 at 2:37pm
writing sentences and paragrahs
Background You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to evaluate your writing skills. The paragraph must describe one particular ...
Friday, August 10, 2012 at 12:45pm
science
what is the kinetic energy of a ball with a mass of 5 kg rolling at 10 m/s
Thursday, August 9, 2012 at 11:13pm
science
what is the kinetic energy of a ball with a mass of 5 kg rolling at 10 m/s
Thursday, August 9, 2012 at 11:12pm
environmental science
describe three common challenges with managing non renewable energy sources.
Thursday, August 9, 2012 at 3:17pm
Science
how does a computer work
Wednesday, August 8, 2012 at 5:49pm
environmental science
Describe three common challenges with managing nonrenewable energy resources?
Wednesday, August 8, 2012 at 4:43pm
science(Ms.Sue)
what does a maple tree do for a community A)it creates energy C)it looks nice B)it creates food D)it stores water my answer is B) am i right, if not tell me why please.
Wednesday, August 8, 2012 at 3:46pm
Science
Which of the following is a vector quantity? speed weight distance traveled mechanical energy Which of the following is a scalar quantity? work velocity acceleration displacement
Wednesday, August 8, 2012 at 2:19pm
Science
Determine the pH of a .10M solution of KA, the potassium salt of HA. For HA, Ka=1.0x10^-5
Wednesday, August 8, 2012 at 11:28am
help
What action should a leader in the Army take when a soldier leaves a thumb drive in the computer that has critical information?
Tuesday, August 7, 2012 at 7:35pm
Science
Describe 2 structures of a plant that help it survive living on the land.
Tuesday, August 7, 2012 at 12:49pm
math
Dear Ms.Sue is the answer to 5lb.-13oz. 67oz. By the way your helping my future,I want to be a math and science teacher.
Monday, August 6, 2012 at 9:02pm
Math
Suzie’s Silk Scarves is a start-up that sells high quality scarves out of a boutique store. The monthly rent of the store is $1,500 and Suzie has one manager who runs the store and earns $3,000 per month. She leases out a computer and other equipment for her store at a ...
Monday, August 6, 2012 at 3:00pm
science
1) - Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session ...
Monday, August 6, 2012 at 12:14pm
mit math
Odometer. A Ford SUV comes standard with rims (which correspondes to a tire with diameter). Suppose you decide to later upgrade these tires for rims (corresponding to a tire with diameter). If you do not get your onboard computer reset for the new tires, the odometer will not ...
Monday, August 6, 2012 at 8:00am
science
An element emits one alpha particle, one positron, and three beta particles. Its atomic number.... decreases by 2 decreases by 1 stays the same increases by 1 increases by 2
Monday, August 6, 2012 at 3:34am
science
a 150 gm ball travelling at 30 m/s strikes the players hand and it stopped in0.06s.calculate the force exerrted by ball on hand
Sunday, August 5, 2012 at 7:43pm
Informal Logic
rite two arguments in English, one in the form of modus ponens and one in the form of modus tollens. Then, write the arguments in symbols using sentence letters and truth-functional connectives. (If your computer does not have all the symbols needed, use some other symbol you ...
Sunday, August 5, 2012 at 10:06am
work3
You are a section chief in the battalion S-3 at Bagram Airbase. You instruct PFC Jackson to download some of the battalion’s current SOP’s onto a thumb drive so that they will be available in the field. After loading the material, you notice PFC Jackson walking away ...
Saturday, August 4, 2012 at 10:34pm
science
how does the musculoskeletal system change from birth to adulthood to achieve 206 bones?
Saturday, August 4, 2012 at 8:06pm
criminal justice
You have completed your investigation on allegations against a plant employee of an acquired corporation, Lake Inc. That is based on the basic information given below. Create a report on the results of your investigation and present final results that your investigation has ...
Saturday, August 4, 2012 at 5:19pm
science
what will be the law of conversion of a) 65 grams 70 grams b) magnesium + oxygen = magnesium oxide 45 grams ? grams 80 grams c) sodium hydroxide + hydrochoride acid 40 grams 36.5 grams sodium chloride + water ? grams 18 grams
Saturday, August 4, 2012 at 12:35pm
science
Hi, I was wondering if I answered this question correctly #1-Two kinds of cell-transport are used in the process that forms ATP. Name the two types of transport and describe how they take place. Electron transport is not a form of cell transport. #1- I think the passive and ...
Saturday, August 4, 2012 at 8:39am
science
a bullet of mass0.01 kg and travelling with a speed of 500m/s strikes a block of mass 2 kg which is suspended by a string of length 5m. The center of gravity of the block is found to raise vertical distance of 0.1m. The speed of bullet after emerging from block is:
Saturday, August 4, 2012 at 1:15am
science
A chair of mass 15.5 is sitting on the horizontal floor; the floor is not frictionless. You push on the chair with a force = 38.0 that is directed at an angle of 42.0 below the horizontal and the chair slides along the floor.Use Newton's laws to calculate the normal force ...
Friday, August 3, 2012 at 4:48am
Informal Logic 103
Write two arguments in English, one in the form of modus ponens and one in the form of modus tollens. Then, write the arguments in symbols using sentence letters and truth-functional connectives. (If your computer does not have all the symbols needed, use some other symbol you...
Thursday, August 2, 2012 at 11:54pm
Computer Programing
Assignment 1: chocolate Delights candy company, part 1
Thursday, August 2, 2012 at 11:03pm
math
A small group of employees in a company get viruses on their computers. Every hour, each computer infects one other computer. If it takes 8 hours for 100 computers to be infected, how long would it take for only 50 computers to be infected?
Thursday, August 2, 2012 at 1:52pm
Science
Why CuO powder not soluble in hexane and methanol?
Wednesday, August 1, 2012 at 2:39am
reading
(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and ...
Tuesday, July 31, 2012 at 3:06pm
Science math, science, social studies
a cyclist travels a distance of 4km from P to Q & then moves a distance of 3 km at right angle to PQ . Find displacement graphically
Tuesday, July 31, 2012 at 10:44am
Earth Science
I need help with the following Lab due tonight, 7/30/12, as I feel completely lost and would appreciate the help. The lab goes as follows: Design an experiment that illustrates the determination of the density of a cylindrical object found in the Lab Kit. Prepare a dynamic ...
Monday, July 30, 2012 at 4:22pm
Earth science
of the three "local winds" types discussed in the text book, which do you think could be most easily harnessed for the generation of electricity by a huge wind farm?
Sunday, July 29, 2012 at 8:41pm
Science
Find the [H+] in a 0.0255 M solution of HF if the Ka = 7.2 X 10^ -4
Sunday, July 29, 2012 at 7:44pm
science
a person moves 30m north, then 20m east and then 30(square root of two)m south west . His displacement from the original position is ?.
Sunday, July 29, 2012 at 11:05am
science
a canoe displaces 100 L of water weighs 9.8 NL what is the bouyant force on the canoe
Saturday, July 28, 2012 at 5:13pm
science
A mixture of {\rm NaCl} and {\rm NaBr} has a mass of 2.10{\rm g} and is found to contain 0.71{\rm g} of {\rm Na} What is the mass of {\rm NaBr} in the mixture?
Saturday, July 28, 2012 at 2:00pm
science
how make a hybridization of pcl5 with dygram
Saturday, July 28, 2012 at 9:16am
SCIENCE
chemical formula for Fe + ZnSO4
Saturday, July 28, 2012 at 8:06am
science
How many outlets can you place on one curcuit in your house
Friday, July 27, 2012 at 11:58am
system analysis and palnning
objective The Milestone Assignments are based on the Projects and Cases for use with the Systems Analysis and Design Methods textbook by Whitten & Bentley. There are six (6) parts to the Project, consisting of twelve (12) milestones. During Weeks 2-7, you will be required to ...
Thursday, July 26, 2012 at 11:07pm
Science , PLEASE HELP !
3 things that all life have in common and an explanation for the meaning of each?
Thursday, July 26, 2012 at 9:39pm
Science 10
The symbol of the lead(IV) ion is ?
Thursday, July 26, 2012 at 7:32pm
science
2 WAYS TO DETERMINE THE INTERIOR ARE GRAVITY, AND SEISMOLOGY.
Thursday, July 26, 2012 at 5:19pm
Science
How can we use Kepler's laws or Newton's laws to learn about these objects?
Thursday, July 26, 2012 at 5:18pm
physical science
what are the number of moles of phosphorus in 15 moles of Ca3(PO4)2
Thursday, July 26, 2012 at 10:41am
Science
You are a Chemical engineer, trying to synthesize N2H4(l). Your boss suggests that you try to synthesis it from the elements, nitrogen and hydrogen, at 25 celsius and 1.0 atm (since this would be a cheap way of doing it). Write a short note to sent to your boss which discusses...
Thursday, July 26, 2012 at 8:21am
Science
What is one way you could take action to reduce your carbon dioxide emissions?
Wednesday, July 25, 2012 at 11:39pm
science
what are atoms
Wednesday, July 25, 2012 at 7:59pm
science
To calculate the area of the front surface of a box you?
Wednesday, July 25, 2012 at 7:29pm
science
A shoe case weighing 40 lb is located on a scale inside a moving elevator that is going upward with the speed of 8 m/s. At time T1 elevator slows down with the acceleration of 3 m/s2 until the time T2. What are the the readings of the scale at T2 and T1 respectively?
Wednesday, July 25, 2012 at 6:33pm
physical science
A train sounding its horn is approaching an observer. The pitch of the horn's sound relative to its normal pitch is???
Wednesday, July 25, 2012 at 5:57pm
Introduction to HS
I am having trouble with a question. In order to get an idea of significant subject areas in a chapter, it is best to read the. A. Subheads B. Graphics C. Captions D. Table of contents In my study guide it states : Read all the subheadings and sub-subheadings. These will give ...
Wednesday, July 25, 2012 at 5:51pm
science
The solubility of sodium chloride is 36.0 g/100. ml of water, and the density of saturated NaCl solution is 1.202 g/mL.. I have 500. mL of a 1.00 M NaCl solution. If I boil it to the point of saturation, what is the final volume?
Wednesday, July 25, 2012 at 4:38pm
com 200
Kyle has struggled to feel comfortable in science classes with labs since his junior year of high school, when a solution he was working with ignited. He was always cautious with chemicals but his lab partner that year enjoyed seeing what would happen when he mixed random ...
Wednesday, July 25, 2012 at 3:05pm
science
A sample of air contains 32.7 µg/m3 of beryllium dust. How many atoms of beryllium are present in a room with dimensions of 8 feet by 13.6 feet by 15.6 feet? Answer in units of atoms
Tuesday, July 24, 2012 at 11:13pm
science
How many milliliters of 4.6 M HCl must be transfered from a reagent bottle to provide 16 g HCl for a reaction? Answer in units of mL
Tuesday, July 24, 2012 at 11:11pm
Science
A solution contains 0.01M ethyl acetate, 0.10M acetic acid and 0.10M ethanol. For the same equilibriujm constant of 2.00, calculate the equilibrium concentrations of ethyl acetate, ethanol, and acetic acid in the solution.
Tuesday, July 24, 2012 at 9:44pm
science
what shows that the sea water is a mixture and not a pure substance? a. it has a sharp boiling point b. it has definite composition c. it consist of a single phase d. the components lose their individual properties
Tuesday, July 24, 2012 at 8:07pm
science
Low water flows are a common problem for ecosystems in semi-urban streams. Should the suggestion of using domestic drinking water supplies to increase water flows in the streams be adopted?
Tuesday, July 24, 2012 at 2:40am
Science
Calculate the pH of an aqueous solution containing 1.3 * 10^-2 M HCl, 3.0 * 10^-2 M H2SO4, and 2.0 * 10^-2 M HCN.
Tuesday, July 24, 2012 at 2:13am
Science
You are a retired law enforcement officer who now teaches at a local community college in the criminal justice program. In addition to teaching ethics, you write crime novels on the side. You recently heard of a real-life case that you thought would make the basis for a good ...
Monday, July 23, 2012 at 8:19pm
science
how might the environmental impacts of deforestation and sprawl affect the human community of Pinchot
Monday, July 23, 2012 at 4:40pm
science-physics
a battery of 12v supplies a charge of 1000C to an electric device. how much work is done by the battery in moving the charge?
Monday, July 23, 2012 at 2:43pm
science -chemistry
Mr. Currie pours himself some coffee into a paper cup before making his way to the amusement park. The coffee temperature is 350C when the cup is placed on the kitchen counter with room temperature of 20o C. Mr. Currie was called to the phone for last minute arrangements, and ...
Monday, July 23, 2012 at 12:46pm
science
when a 424-g of iron powder is burned in an oxygen atmosphere, 0.606-g of a reddish brown oxide is obtained. Determine the empirical formula of the oxide.
Monday, July 23, 2012 at 7:01am
science
Two machines A and B produce respectively 60% and 40% of the total number of items of a factory. The percentages of defective output for A and B are 3% and 2% respectively. Suppose an item is selected at random, and is found to be defective. The probability that the item was ...
Monday, July 23, 2012 at 1:12am
science
A box contains 10 balls of which 6 are red (R) and 4 are white (W) . Three balls are taken from the box at random, one after the other. The probability that the 3 balls drawn are in the order RRW is equal to,
Sunday, July 22, 2012 at 11:47pm
Science
Define a day by the passage of the sun
Sunday, July 22, 2012 at 8:17pm
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