Homework Help: Science

Branches of Science

Recent Homework Questions About Science

Physics -please help
This is for my earth science class I have not had physics- If a person pulls on a cart to the right with a force of 10 N and a second person pulls to the left with a force of 3 N, what is the net force(+direction)on the cart? I came up with 130 N downward force
Thursday, March 29, 2012 at 9:56am

science
why does cobalt chloride strip turn pink or blue?
Thursday, March 29, 2012 at 7:25am

science
Examine the obvious environmental impacts as well as significant social and physical ramifications of urban sprawl. What is the relationship between landscape and psychological well being? After defining this relationship, discuss how the presence or absence of natural beauty ...
Thursday, March 29, 2012 at 3:24am

science
Give examples of how humans have increased their food supply and what effects these methods have on the environment overall.
Thursday, March 29, 2012 at 12:05am

Science
The sun emits billions of watts of light,heat,and energy ever second. How much of this light,heat, and energy does the Earth benefit from?
Wednesday, March 28, 2012 at 9:54pm

AP Science
A 2 N and 6 N force pull on an object to the right and a 4 N force pulls to the left a 0.5 kg object. What is the net force on the object? Is the answer 4N to the right
Wednesday, March 28, 2012 at 8:17pm

Science
How do these rank in momentum 1 being least and the most 5 Fast car, stopped truck, slow car, Fast baseball, Fast feather I have 1. Stopped truck
Wednesday, March 28, 2012 at 8:06pm

Science
A 2 N and 6 N force pull on an object to the right and a 4 N force pulls to the left a 0.5 kg object. What is the net force on the object?
Wednesday, March 28, 2012 at 8:00pm

science
if a person is pushing a cart with a force of 40 newtons and it accelerates at 0.5 m/s2 what is the mass of the cart
Wednesday, March 28, 2012 at 7:32pm

science
Jamie sketched the following picture of the landscape he saw while he was on vacation. It included cacti & barren rock. (picture of a desert) What can you conclude about what kinds of plants can grow in this climate? A) only plants that grow very rapidly can grow in this ...
Wednesday, March 28, 2012 at 6:56pm

social science
Professor Koo examined the literature on AIDS and could find nothing that examined children’s attitudes toward parents and friends with AIDS. To examine this study, Dooley should undertake a(n) a. examination of reductionism b. descriptive study c. explanatory study d. ...
Wednesday, March 28, 2012 at 8:31am

Physical Science
What is the kinectic energy in joules of a 500kg automobile traveling at 45km/hr?
Tuesday, March 27, 2012 at 10:15pm

Science
While Carmen is at the park with her family, she walks up to a wishing well. She throws a penny down the well, and she hears a splash at the bottom. Which of the following best describes what happens as the penny falls? A)The force of gravity is equal to the air resistance ...
Tuesday, March 27, 2012 at 7:54pm

Science
Which of the following explains why a parachute makes a person falling from a great height fall more slowly? A)The parachute reduces the friction in the air. B)The parachute pulls upward, so the fall is slower. C) The parachute causes air resistance, which slows the fall. D)...
Tuesday, March 27, 2012 at 7:34pm

written analysis
In weeks 1 and 2, via your introduction to the critical thinking process, you are briefly introduced to some of the most powerful and complex questions humans have ever asked: What is truth? What is knowledge? How do you know what you know? In this assignment, you will start ...
Tuesday, March 27, 2012 at 6:28pm

science
A plane is flying at an angle of 20 N of east 230 m/s. what is the component of its velocity in the northward direction?
Tuesday, March 27, 2012 at 5:24pm

physical science
absolute zero is the same as
Tuesday, March 27, 2012 at 4:54pm

English
I still have to include the following sentences. I really hope you can help me check them. 1) All the commas in your paragraphs are set in place of periods. Divide your long sentences into shorter sentences consisting of subject, verb and complements. 2) Link them using ...
Tuesday, March 27, 2012 at 3:55pm

6th grade science
A factory is found to be polluting a stream high up in the Rocky Mountains. The factory owner says that this is not aproblem because the stream is very small. Why do you disagree/agree with the owner. I disagree. who gives a crap if the stream is small. Thats like saying a ...
Tuesday, March 27, 2012 at 2:20pm

6th grade science
can streams run underground. Can they start above ground and run nunderground. PLease help me, I am so so stuck.
Tuesday, March 27, 2012 at 2:17pm

6th grade science
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Tuesday, March 27, 2012 at 1:57pm

Science; magnets
I know that magnets are attracted to iron. I don't know the proccess of how magnets stick to something. I also need to know more sciency magnet words like magnetism and ferrous.like that. what is magnetism. stuff like that. i need help because I might fail the pssa. i dont...
Monday, March 26, 2012 at 7:10pm

to ms.sue or soccerstar or someone
can you help me study with magnets and elactricty because I'm usually not in class when we have science experiments to see how it actually works.
Monday, March 26, 2012 at 7:01pm

Science (PLEASE HELP)
The oceans are so large that many people believe the oceans can absorb vast amounts of pollution without harm. Analyze the error in this concept, and explain how ocean pollution can affect human food supplies?
Monday, March 26, 2012 at 6:21pm

Science
How does the process of upwelling affect the distribution of life in the ocean? A.It keeps the salinity of the ocean constant. B.It replaces polluted water near shore with clean water. C.It replaces nutrient-depleted waters with nutrient-rich waters. D.It carries energy-rich ...
Monday, March 26, 2012 at 6:12pm

science
Some theoriests say that in the inflationary period, the scale of the universe increased by a factore of 1050. Suppose your height were to increase by a factore of 1050. How tall would you be? Express your answer in light-years and compare it to the size of the observable ...
Monday, March 26, 2012 at 5:01pm

science
Compare and contrast an asteroid and a comet.
Monday, March 26, 2012 at 4:37pm

science
At 472 deg C the reaction reaches equilibrium with the following composition: [H2]=7.38atm, [N2]=2.46atm, [NH3]=0.166atm. Into the equilibrium mixture 1.5 atm of N2 is introduced: a. Calculating Kp and Q, determine in which direction the reaction will proceed after addition of...
Monday, March 26, 2012 at 2:56pm

statistics
1. The fracture strength of a certain type of manufactured glass is normally distributed with a mean of 579 MPa with a standard deviation of 14 MPa. (a) What is the probability that a randomly chosen sample of glass will break at less than 579 MPa? (b) More than 590 MPa? (c) ...
Monday, March 26, 2012 at 1:09pm

science
What conditions are present in stars that cause hydrogen to form helium? What is this process called?
Monday, March 26, 2012 at 1:03pm

science
Most stars we see are on the main sequence. Stars spend most of their lives consuming their initial stock of hydrogen. Is there a connection between these two statements? If so, what is it?
Monday, March 26, 2012 at 12:34pm

science
what are the hazards that can be caused during this health and safety experiment
Monday, March 26, 2012 at 10:00am

science
A merry-go-round starts from rest and accelerates uniformly over 26.0 s to a final angular velocity of 5.50 rev/min.
Monday, March 26, 2012 at 12:13am

science
a 2000 kg sedan is traveling west at 25m/s. How would the sedan's momentum change if it slowed down to 10 m/s?
Sunday, March 25, 2012 at 7:39pm

science
2 mole jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
Sunday, March 25, 2012 at 5:01pm

Computer Science
I got part one but part 2 is confusing. Part1: Create a class called Person that has two subclasses Student and Employee. Make Faculty and Staff subclasses of Employee. A person has name and address. A student has GPA as a real number between 0.00 and 4.00. An employee has an ...
Sunday, March 25, 2012 at 4:20pm

science fair
in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write procedure. i wrote the procedure now do i rewrite it for testing my hypothesis?
Sunday, March 25, 2012 at 4:14pm

science fair
in my science fair report school layout they want us to write a paragraph on testing my hypothesis and before that they asked us to write the procedure. i wrote the procedure now do i rewrite it for testing my hypothesis? or do i write something else
Sunday, March 25, 2012 at 3:07pm

science
Which of the following would most likely cause rising air? A warm air and low pressure B cold air and low pressure C warm air and high pressure D cold air and high pressure Please give us the answer.
Sunday, March 25, 2012 at 1:06pm

Science
What does a thermohygrometer do?
Sunday, March 25, 2012 at 6:28am

science
Which of the following would most likely cause rising air? A warm air and low pressure B cold air and low pressure C warm air and high pressure d cold air and high pressure
Saturday, March 24, 2012 at 9:54pm

science
Which of the following has the greatest effect on the formation of rain or snow? A cloud cover B humidity C air pressure D temperature
Saturday, March 24, 2012 at 9:25pm

science
An object is traveling in a straight line in space.No forces are affecting it. What will happen to the object's motion?
Saturday, March 24, 2012 at 2:01pm

science
A book is on top of a table. Earth's gravity exerts a constant force of 15N on the book. Why does the book not move as a result of this force?
Saturday, March 24, 2012 at 1:57pm

Science, Chenistry
If you have a tank containing 10,000L of water. what weight of CaSO4.H2O must be added to math the Ca+ concentration of 130ppm
Saturday, March 24, 2012 at 12:56pm

Science
Which is the closest to the speed of sound in air? A. 7miles per hour B. 70miles per hour C. 700miles per hour D. 7000miles per hour C?
Saturday, March 24, 2012 at 11:07am

science
measurdment
Friday, March 23, 2012 at 8:45pm

pol science
Locate indiana stateÂ’s constitution and examine the major elements and articles of the constitution. Review its contents and functions. Search for information about the judicial, educational, and social service systems offered in indiana state and the funding ...
Friday, March 23, 2012 at 12:14pm

English
Writeacher, can you please check these sentences? Thank you very much. 1) My list included 27 students, including an older student from class IV F who would like to be involved in a science project to be carried out in English. 2) As you can see 17 of your students sent email ...
Friday, March 23, 2012 at 10:22am

Science
The bonds between ions of opposite charge is strongest when the ions are small, the lattice energy of LiF is more exothermic than the lattice energy of CsI. Explain.
Friday, March 23, 2012 at 12:07am

Science
How many milliliters of water at 20.0 °C are formed in the combustion of 25.0 g of a methanol–propanol mixture that is 62.5% methanol by mass? Assume there is an excess of oxygen available.
Thursday, March 22, 2012 at 11:48pm

Earth/Space Science
In many ways, the floor of oceans is no better explored than space. Why could discoveries such as life around deep-sea hotspots not be investigated until the past few decades?
Thursday, March 22, 2012 at 8:32pm

Science
What type of signal is measured in a sonar system to determine the depth of the ocean? A. absorption of sound waves by underwater features B. reflection of sound waves by underwater features C. absorption of electromagnet waves by underwater features D. reflection of ...
Thursday, March 22, 2012 at 8:21pm

algebra 11
At Joseph Middle School, the probability that a boy takes English and Science is 0.087. The probability that a boy takes English is 0.68. What is the probability that a boy takes Science given that the boy is taking English?
Thursday, March 22, 2012 at 7:01pm

Science
A Fisherman in a row boat notices that one wave crest passes his fishing line ever 5 seconds. He estimates the distance between the crests to be 1.5 meters and that the crests of the waves are about .5 meters above the troughs. Using this data, determining the amplitude and ...
Thursday, March 22, 2012 at 6:14pm

SCIENCE
A string of length 8 m fixed at both the ends has a tension of 49 N and a mass 0.04 kg. Find the speed of transverse waves on this string.
Thursday, March 22, 2012 at 7:34am

nutrition
Making a transceiver from sccrtah is a pretty awesome project. It can take a while, though.There's a lot of theory of operation that factors in physics and engineering.I'm a radio technician, so I'm biased, but if I were a science teacher I would be amazed if ...
Wednesday, March 21, 2012 at 8:48pm

science/chemistry
I have the answer but how do you solve for this problem: What is the freezing point of a sugar solution prepared by dissolving 375.00g of sucrose (342.3g/mol) in 1500.0g of water (Kf of water=1.86 degrees Celcius)?
Wednesday, March 21, 2012 at 8:37pm

Opinion
Which class would be better(easier) to take Earth Science or Astronomy?
Wednesday, March 21, 2012 at 8:29pm

Science
How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light Reflect means to ...
Wednesday, March 21, 2012 at 6:57pm

Science/Chemistry
please help... What is the molarity of 3.68mL of a solution containing 0.0025 moles of calcium chloride?
Wednesday, March 21, 2012 at 6:51pm

science
If Deneb and Rigel were located at alpha Centauri's distance from earth, how would they appear? PLEASEEE HELPPPPPP!!!!!!!!!!
Wednesday, March 21, 2012 at 6:37pm

science
why does a cool, distant, supergiant star such as Betelgeuse have such a high apparent magnitude? PLEASE HELPPPPP!!!!!!
Wednesday, March 21, 2012 at 6:34pm

science
what would be the absolute magnitude and color of a main sequence star with a temperature of 25,000 kelvin? HELP!
Wednesday, March 21, 2012 at 6:31pm

to writeacher
can you help me with science. we usually have science on wednesday, but during that time, i have to go to violin. i dont get aything about electricity or magnets.
Wednesday, March 21, 2012 at 6:26pm

Science Help
How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light Reflect means to bounce...
Wednesday, March 21, 2012 at 6:00pm

computer science
write a program to select the classes that you are taking(Ex. Computer Science) .When the button is clicked, the program should print the names of the computer language studied. If no, check boxes have been selected, the sentence "No language studied should be printed
Wednesday, March 21, 2012 at 4:52am

science
deduce what similarities would be found in the DNA structure of genes from a cat human and eucalyptus tree
Wednesday, March 21, 2012 at 3:06am

science
True or false, at 25 degrees celsius H+ ion concentration in pure water is 7 x 10^ -7 mole per liter?
Wednesday, March 21, 2012 at 12:28am

science
You are confronted with the following question: One mole of an ideal gas is sealed in a 22.4- container at a pressure of 1 and a temperature of 273 . The temperature is then increased to 305 , but the container does not expand. What will the new pressure be? Part A The most ...
Tuesday, March 20, 2012 at 11:18pm

science
if the density of octane is 0.703 g/mol, how many gras of carbon dioxide are produced in the combustion of 40L of octane??
Tuesday, March 20, 2012 at 10:23pm

Science
1. A 25.00 sample of 0.723M HClO4 is titrated with a 0.273M KOH solution. The H3O+ concentration after the addition of 10.0mL is___M. 2. Determine the pH of a 0.188M NH3 solution of at 25 degrees C. The Kb of NH3 is 1.76x10-5.
Tuesday, March 20, 2012 at 9:59pm

Science
1.What is refraction? The bending of light as it passes through matter 2.What type of lens would you use to magnify your view of a butterfly? Concave 3.What is a sound wave? Sound waves are waves of energy moving through matter.Sound waves are vibrations of molecules,molecules...
Tuesday, March 20, 2012 at 9:32pm

Physical Science
Two identical beakers are both half filled with a liquid. Beaker A contains water and Beaker B contains a liquid that is denser than water. Which of the following is FALSE? a. The pressure at the bottom of Beaker B is greater than that at the bottom of Beaker A. b. The ...
Tuesday, March 20, 2012 at 9:02pm

Physical Science
During a storm, the wind exerts a 150-N force on a window that measures 1.00 m by 0.50 m. The outside air pressure is 101 kPa. What pressure, in pascals, does the wind exert on the window? a. 75 Pa b. 150 Pa c. 1.5 x 10^3 Pa d. 3.0 x 10^2 Pa e. 3.0 x 10^5 kPa
Tuesday, March 20, 2012 at 9:00pm

science
If the greatest potential energy is 100J will the kinetic energy of the object ever reach 100J?
Tuesday, March 20, 2012 at 8:47pm

statistics
The average score on a science test was 72 with a standard deviation of 6. The average score on a history test was 89 with a standard deviation of 7. Compare the variability of the two classes.
Tuesday, March 20, 2012 at 8:44pm

science
what is the difference between convection and conduction and what are their defemitions ...studying for test but i dont know what they are:)
Tuesday, March 20, 2012 at 8:35pm

Earth/Space Science
Which of the following is responsible for absolute sea-level changes? A. formation and melting of ice sheets B. erosion of land surfaces by wind and water C. human activities along coastlines, such as development and grading D. movements of a tectonic plate, causing part of ...
Tuesday, March 20, 2012 at 5:20pm

Earth Science
Two locations, one in northern canada and one in the southwestern United states, recive the same amount of precipitation each year. The location in canada is classified as a humid climate. Why would the location in the United states be classified as an arid climate?
Tuesday, March 20, 2012 at 1:11am

science
what is bouyancy?
Monday, March 19, 2012 at 8:32am

science
How does grazing, septic systems and recreational boating contribute to non-point source pollution ?
Monday, March 19, 2012 at 12:36am

science
Why do you think the watershed approach to addressing nonpoint source pollution is useful?
Monday, March 19, 2012 at 12:06am

Earth/Space Science
Why are icebergs in shipping lanes so hazardous?
Sunday, March 18, 2012 at 8:49pm

Physical Science
I balanced Li(s) + Cl2(g)= LiCl(s) to 2Li(s) + Cl2(g)= 2LiCl(s) Now the question is, if you have 39.8g Li, how many moles of LiCl would you have? I am stuck on this part. Any help would be appreciated.
Sunday, March 18, 2012 at 8:38pm

Science-Chemistry
In the following test for Sulfated Ash, ammonium carbonate solution was added. What is the purpose of adding ammonium carbonate solution? Heat a silica crucible to redness for 30 minutes, allow to cool in a desiccator and weigh. Place 1g of the substance in the crucible and ...
Sunday, March 18, 2012 at 5:51am

science
Why is it sometimes difficult to make connections between poor water quality and health issues? Among ocean industries, which are the THREE most important branches, economically? compare and contrast persistent and non-persistent pollutants. Explain why persistent pollutants ...
Friday, March 16, 2012 at 2:15pm

Political Science/Media
which of the following news sources typically provides the LEAST depth while covering topics? a) television b) magazines c) radio d) the Internet e) newpapers
Friday, March 16, 2012 at 12:26am

Political Science/Media
True or False Because of their dependence of government sources, the news media are unable to set the agenda of debate.
Friday, March 16, 2012 at 12:23am

political science/media
most local newspapers get their national news from... a) government reports, press brieefings, and announcements b) interviews with politicians c) local reporters d) wire services e) the Internet
Friday, March 16, 2012 at 12:22am

science
Identify one harmful activity that humans do that might change the percentage of water that is available as a resource? Predict the possible effects this activity could cause to the food chains in that area, the changes in the number and types of organisms, and on the ...
Thursday, March 15, 2012 at 6:34pm

Science
Ten grams of ice are heated in a closed container until it turns to steam. What is the mass of the steam?
Thursday, March 15, 2012 at 3:46pm

Science
How can science be used to help discourage seagulls from attacking students during lunch?
Thursday, March 15, 2012 at 3:44pm

science
Who would have to overcome inertia to move the ball, a golfer or a soccer player?
Thursday, March 15, 2012 at 3:16pm

health
What is a medical scientist,if you want to study medical science,what are the minimum requirements?and how can you briefly describe medical science?
Thursday, March 15, 2012 at 1:31pm

science
The Kangzi dictionary compiled in China in 1710 during the Qing dynasty encompasses 46964 characters. How many bits would it take to specify a specific Kangzi character
Thursday, March 15, 2012 at 10:10am

science
What kind of chemical bonding(chemical elemants) occurs in bricks, elastic, and rope
Thursday, March 15, 2012 at 10:09am

science
How do the principles of physics and chemistry both come into play when developing new materials
Thursday, March 15, 2012 at 10:07am

science
where can i get pictures of muscular energy and wind energy?
Thursday, March 15, 2012 at 2:02am

political Science
Whice statement about public opinion polls is NOT True? a) in modern election campaigns, politicians have almost never used public opinion polls. b) politicians use polls in order to help them make decisions about whether to run for office, what policies to support, and what ...
Wednesday, March 14, 2012 at 10:08pm

Political Science
True or False Calling randomly selected phone numbers is the main method pollsters use to gather a random sample.
Wednesday, March 14, 2012 at 10:04pm

political science
An important reason for why public policy and public opinion may not coincide in the United States is that... a) the American system of government includes arrangements, such as an appointed judiciary, which may produce policy decisions that run contraty to prevailing popular ...
Wednesday, March 14, 2012 at 10:02pm

Science
How many grams of barium carbonate can be produced from mixing 100.0 mL of 0.20M barium nitrate and 50.0 mL of 0.30M potassium carbonate?
Wednesday, March 14, 2012 at 7:51pm

physical science
a cyclist pedals at a constant velocity of 15m.s-1 on a level road. the power delivered by the cyclist is 240W. what is the magnitude of the frictional foce acting against the motion?
Wednesday, March 14, 2012 at 5:44pm

Engineering Science (Physics)
A platinum coil has a resistance of 3.146(ohms) at 40'C and 3.767(ohms) at 100'C. Find the resistance and the temperature coefficient of resistance at 0'C. Thanks in anticipation
Wednesday, March 14, 2012 at 4:26pm

science
What are some of the dangerous by-products of waste incineration and pyrolysis? Anything to help with this would be great.
Wednesday, March 14, 2012 at 2:37pm

Computer Science (java1)
can someone please tell me the equation for compshift? double Angle = 45.0; double AngleRadians; double ComptonShift ; //calculations AngleRadians = Math.toRadians(Angle); ComptonShift = Helpppp here
Wednesday, March 14, 2012 at 2:31pm

science
What is smog? What is the biggest source of smog today? I know smog is a type of air pollution, but I am not aware of the biggest source of smog. Anything to help with that part of the question, would be great
Wednesday, March 14, 2012 at 1:41pm

SCIENCE/ earth
Thanks Ms Sue!!!
Wednesday, March 14, 2012 at 12:36pm

SCIENCE/ earth
plate tectonics crossword puzzle what Qs and As can i use??????? PLZZZZZ HELP ME!!!!!!!!!!!!!
Wednesday, March 14, 2012 at 12:12pm

science
How do the principles of physics and chemistry both come into play when developing new materials?
Wednesday, March 14, 2012 at 9:36am

science
What kind of chemical bonding occurs in bricks, elastic, rope?
Wednesday, March 14, 2012 at 9:19am

science
as we reach a possible peak in oil production, what alternatives are forming?
Tuesday, March 13, 2012 at 11:43pm

science
could you help me with my outline paper on water cycle have tohave a outline
Tuesday, March 13, 2012 at 11:29pm

science
in chapter six of contemporary enviromental issues, the past century has been referred to as the Age of oil. As we reach a possible peak in oil production, what alternative, are forming? Consider the role of OPEC, perhaps,in reorganizing and monitoring oil production. What do ...
Tuesday, March 13, 2012 at 11:23pm

science
the global water cycle provides renewable water, but a number of factors affect how much freshwater is available for human consumption. Describe these factors and circumstances. When do human interventions in water avaliabity pose serious problems to accessibility
Tuesday, March 13, 2012 at 10:56pm

statistics
A study of health care planning undertook a mail survey of hospital administrators in Arkansas, Louisiana, and east Texas. Research question: At á = .05, is the type of planning independent of the intensity of competition? (Data are from D. O. McKee, P. R. Varadarajan, ...
Tuesday, March 13, 2012 at 10:34pm

science
What is the effect as the epiglottis covers the larynx?
Tuesday, March 13, 2012 at 7:39pm

physical science
the intensity of blue light is lowered will the reading on the ammeter shows a reading which indicates an electric current
Tuesday, March 13, 2012 at 4:13pm

physical science
explain why on photon-electros are emitted when red light is shone on the metal cathode
Tuesday, March 13, 2012 at 4:11pm

physical science
when a photon of energy hf elects an electro violently from an atom. How is this energy distribute in the process me electing electron?
Tuesday, March 13, 2012 at 4:09pm

science
What mass of iron must react to produce 3600 kJ of energy? 3Fe+2O2 →Fe3O4 ∆H=-1120kJ
Tuesday, March 13, 2012 at 2:05pm

physical science
(a) If a person wearing such a mask exhales 0.702 g CO2 per minute, How many grams of KO2 are consumed in ten minutes?
Tuesday, March 13, 2012 at 12:46pm

physical science
Since October 2004, Jack Daniels Tennessee whisky, produced in Lynchburg, TN, has been bottled at 80 proof (40% alcohol by volume). Given that the density of ethyl alcohol is 0.789 g/cm3, and that of water 1.00 g/cm3, calculate the concentration of the alcohol in (a) percent ...
Tuesday, March 13, 2012 at 12:44pm

goechemistry-science
i ppted out iron(111) form a solution and weighed the ppt. then dissolved the ppt in a solution and run in an aas and get the concentration. how can i get the percentage concentration of fe3+ given that it is from fe(oh)3
Tuesday, March 13, 2012 at 5:36am

math
The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8 State the domain and range of this function. (1 mark) ...
Tuesday, March 13, 2012 at 3:01am

science
based on your knowledge of environmentalscience, what could explainthese observation? Support your answer with specific results from your data and ideas fromyour readings
Monday, March 12, 2012 at 10:18pm

science
what do recommend to Pinchot as " a sustainable " level of fragmentation that conserves the forest's biodiversity and ecosystem services while still allowing for some development?
Monday, March 12, 2012 at 10:03pm

science
do your results support idea that trophic cascades occur in nature?
Monday, March 12, 2012 at 9:53pm

science
how far will 350 jules raise a block weighing 7n
Monday, March 12, 2012 at 9:04pm

political science
which of the following terms describe America's fundamental political values? a) internationalist & isolationiat b) inedpendent & moderate c) Republican & Democrat d) liberal & conservative e) liberty, equality & democracy
Monday, March 12, 2012 at 8:19pm

Science
Describe a hybrid plasmid. What is this?
Monday, March 12, 2012 at 6:58pm

Science
What is the total braking distance for a car that is going 60km/h on wet road (0.10)? The drivers reaction time is 1.5 seconds.
Monday, March 12, 2012 at 6:46pm

Science
The line spectra of two elements are not identical because- (A)The element do not have the same number of neutrons (B)They have different mass numbers (C)Their outermost electrons are at different energy levels (D)They have different valencies
Monday, March 12, 2012 at 5:18pm

Science
Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same rate.
Monday, March 12, 2012 at 4:47pm

science
Are the following substances acid, base, or neutral: sodium bicarbonate (pH = 8.3): Blood (pH = 7.4): milk (pH =6.7): orange juice (pH = 3.6): milk of magnesia (pH = 10.5): How do you come up with the answers?
Monday, March 12, 2012 at 3:56pm

critical thinking test AU
1. Question : The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses: Student Answer: 4 CORRECT an average ...
Monday, March 12, 2012 at 2:10pm

Science
Two thin strings supported a 200g metre ruler 20cm and 30cm from both ends. Calculate the tension in each string.
Monday, March 12, 2012 at 6:50am

Science
Why does water have more surface tension than methylated spirits?
Monday, March 12, 2012 at 4:39am

Political Science
Based on Bryan Caplan's book, The Myth of the Rational Voter: Offer your own opinion, and critical analysis, to Caplan’s argument about “rational irrationality.” What are the implications about Caplan’s story for American democracy? Do you agree with ...
Monday, March 12, 2012 at 3:40am

Science (Chemistry)
How many grams of dry NH4Cl need to be added to 1.90 L of a 0.200 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.99? Kb for ammonia is1.8*10^-5. Can anyone help me with this question? I have no idea how to solve it.
Monday, March 12, 2012 at 3:25am

Science
Drought, flood and/or bushfire effects on the Red Wattle bird. Please help this part is in my assignment and its due tomorow!
Monday, March 12, 2012 at 1:23am

math
The length of time that it takes for a pendulum to make one complete swing depends on the length of the pendulum. The time in seconds, T, is related to the length in metres, L, through the equation T=2π√ L/9.8 Write this equation in function notation. (1 mark) State...
Monday, March 12, 2012 at 12:44am

science-Help!
What does it mean in the scientific method that the second step is research? I need to write up the 5 steps of scientific method explaining my experiment-how do i do research?
Sunday, March 11, 2012 at 9:21pm

science
How do I find oxidation numbers of certain elements in compounds? I'm really confused so very simple terms would be appreciated. EX: What is the oxidation number of sodium in NaOH???
Sunday, March 11, 2012 at 4:03pm

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