Homework Help: Science

Branches of Science

Recent Homework Questions About Science

science
two equal forces have their resultant equal to either.what is the inclination between them?
Thursday, June 28, 2012 at 10:05am

science
two bombs of 20 kg and 30 kg are thrown from a cannon with the same velocity in the same direction .which bomb will reach the ground first ?explain
Thursday, June 28, 2012 at 9:52am

science
prove that the maximum horizontal range is 4 times the maximum height attained by a projectile which is fired long the required oblique direction
Thursday, June 28, 2012 at 9:50am

science
which is the pah followed by a javelin projected horizontally by an athlete?
Thursday, June 28, 2012 at 9:48am

science
a particle travels in a straight line ,such that for a short time 2s<t<6s its motion is described by v=(4/a)m/s where a is in m/s^@. if v=6m/s when t=2s,determine the particle the particle's acceleration when t=3s
Thursday, June 28, 2012 at 7:47am

Engineering Science
A bullet with a mass of 28g and travelling at 300m\s strikes a body with a mass of 14kg and which can move freely. The bullet remains in the body. At What velocity will the body start to move?
Thursday, June 28, 2012 at 2:25am

earth science
Which of the following is a biotic factor in an ecosystem? a.trees b.wind c.Precipitation amount d.sun light
Wednesday, June 27, 2012 at 9:11pm

science
Three very small spheres of mass 3.00 kg, 5.00 kg, and 3.00 kg are located on a straight line in space away from everything else. The first one is at a point between the other two, 13.0 cm to the right of the second and 24.0 cm to the left of the third. Compute the net ...
Wednesday, June 27, 2012 at 6:05pm

computer science
Using the Crow’s Foot notation, create an ERD that can be implemented for a medical clinic, using the following business rules: A patient can make many appointments with one or more doctors in the clinic, and a doctor can accept appointments with many patients. ...
Wednesday, June 27, 2012 at 4:08pm

science
Which of the following is TRUE? A It was recently discovered that the pituitary gland does not actually do anything. B The hypothalamus is responsible for controlling the activity of the pituitary gland. C The pituitary gland controls the hypothalamus, which in turn controls ...
Wednesday, June 27, 2012 at 3:32pm

science
a cheetah runs at a distance of 200meters in 10 seconds .what is the speed of cheetah in m/s and km/h
Wednesday, June 27, 2012 at 12:46pm

science
In the laboratory with the following dimensions: 5 m long, 4 meters wide and 2.5 m height. a cylinder of 10 l of CO compressed to 25,000 kPa, empties. Calculate the ambient concentration of CO will be achieved and see if they meet or exceed the values of OEL (25 ppm) or IDLH (...
Wednesday, June 27, 2012 at 9:05am

Aurora national Science High School
a +4C charge is 400m along the horizontal line toward the right of a -3C charge. Calculate the E at a point 300m above the negative charge. ASAP please. It's 7:48pm here and I need it tomorrow at 7am. Thanks.
Wednesday, June 27, 2012 at 7:45am

science
calculate the increase in entropy when 1gm of ice at -10C is converted into steam at 100C. specific heat of ice=0.5,
Wednesday, June 27, 2012 at 6:57am

science
a train stooping at two stations 4km apart takes 4 min on the journey from one of the station to the other.assuming that it first accelerates with a uniform acceleration x and then that of uniform retardation Y,prove that 1/X+1/Y=2
Wednesday, June 27, 2012 at 5:39am

science
please give me a diseases of the blood.give me full answer,my teacher asked please help me please thank you.
Wednesday, June 27, 2012 at 5:00am

science
5 easy ways on how to take care our ears
Wednesday, June 27, 2012 at 12:25am

Science
How Would I Draw A Picture Of A Connection Involving the hydro Sphere(water).
Tuesday, June 26, 2012 at 7:45am

physical science
there is current of 0.65a through a light bulb in a 120v circuit what is the resistance of this light bulb?
Sunday, June 24, 2012 at 2:04pm

science (very important)!!!!
Calculate the final concentrations in mol/L of H+, Na+, Cl- and SO42- when the following three solutions are mixed together: 1000 cm3 of 0.10 mol dm-3 HCl 500 cm3 of 0.20 mol dm-3 NaCl 500 cm3 of 0.20 mol dm-3 of Na2SO4
Saturday, June 23, 2012 at 12:37pm

science!
How much of a 0.10 M H2SO4 solution is required to neutralise 1g of NaOH? Express your answer in cm3.
Saturday, June 23, 2012 at 2:44am

science
Calculate the final concentrations in mol/L of H+, Na+, Cl- and SO42- when the following three solutions are mixed together: 1000 cm3 of 0.10 mol dm-3 HCl 500 cm3 of 0.20 mol dm-3 NaCl 500 cm3 of 0.20 mol dm-3 of Na2SO4
Saturday, June 23, 2012 at 2:43am

science
please give me a part of the blood or function
Friday, June 22, 2012 at 11:09am

science
what is the 4 part of the blood
Friday, June 22, 2012 at 4:26am

Science
What happens to approximately 60% of the energy released during the complete oxidation of glucose? A) It is used to synthesize more ATP. B) It is reused to supply the energy for anabolic reactions. C) It is stored in the body as fat. D) It is lost by the body in the form of heat
Thursday, June 21, 2012 at 10:04pm

Science help
Will someone please check my work for me? Molecules involved in a chemical reaction must meet to react. What is this concept called? entropy enthalpy collision theory<---- reaction rate 2. Which of the following equations is used to describe reaction rates? ∆H - T&#...
Thursday, June 21, 2012 at 3:35pm

phy science
a 20,000kg railroad car is traveling at 3m/s when it collides and couples with a second, identical car at reat. What is the resulting speed of the combined cars?
Thursday, June 21, 2012 at 3:01pm

to ms.sue-science project part 1
so is the project basically asking to write down details abd information i learned about solar cars and to write down the websites? please read this and describe to me: Please select one of the four solar-energy-based topics listed below to research. Based on your research you...
Thursday, June 21, 2012 at 12:07pm

to ms.sue- science project part 1
Please select one of the four solar-energy-based topics listed below to research. Based on your research you are to create a poster that details what you learned. Please make a bibliography of the resources that you used for your information, to go along with your poster. ...
Thursday, June 21, 2012 at 11:19am

Science
can anyone please give me an example of a numbered key (classification) for these organisms about their structural features? squirrel,turtle, emu, goldfish and mouse. i need to make three but i need one example... thank you
Thursday, June 21, 2012 at 7:29am

drawing
please give me some important tips about decoration of a science chart based on 'tiger in trouble.'
Thursday, June 21, 2012 at 4:50am

drawing
please give me some important tips about decoration of a science chart.
Wednesday, June 20, 2012 at 9:59pm

Science
The placement of metal and non-metal elements in the periodic table makes it possible to predict the formation of compounds. Which of the following chemical formulas indicates the formation of an ionic compound? a. KI b. ICI c. SO3 (the three is small) d. CHCL3 (the three is ...
Wednesday, June 20, 2012 at 9:36pm

Science
ive got 2 questions: the star Vega is 25 lightyears away from us. if we sent a radio message to Vega, and another civilization on a planet circling that star answered us, in what year could we expect to hear a reply? why was it necessary to make radio telescopes so much bigger...
Wednesday, June 20, 2012 at 7:38pm

Science
How did Galileo come to the conlcusion that the moon has mountains on its surface? Please don't give me the answer! Just a website that contains the answer would be great, thanks.
Wednesday, June 20, 2012 at 7:12pm

Science
When people buy astronomical telescopes, they have an option to buy a set of eyepieces to go with it. If Fred bought a telescope with an objective with a focal length of 2000 mm, and eyepieces with focal lengths of 40 mm, 16 mm, and 8 mm, then what magnifications will Fred ...
Wednesday, June 20, 2012 at 6:59pm

phsical science
a tire contains air ata pressure of 2.8 bar at 10 degree celsius.if the tires volume is unchanged what will the air pressure in it be when the tire warms up to 35 degree celsius if the car is driven.
Wednesday, June 20, 2012 at 11:05am

science
What is the maximum speed with which a 1300 kg car can make a 180 degree turn on a flat road
Wednesday, June 20, 2012 at 3:28am

Science
What is the pH of 115 mL of a 1.50 m solution of HNO2 that is titrated with a 1.50 M solution of LiOH at the equivelence point?
Wednesday, June 20, 2012 at 2:27am

physical science
what is the kinetic energy of a 15g bullet that traveling at 450m/s
Monday, June 18, 2012 at 7:38pm

Science
A bullet weighing 25 gm fired from a G3 Infantry Assault Rifle achieves muzzle velocity of 800 m/s.
Monday, June 18, 2012 at 7:20pm

physical science
what is change of [potential energy as result of this move of how much work is done in raising a 35kg crate a distance of 1.5m above a storeroom floor
Monday, June 18, 2012 at 5:45pm

physical science
a ball dropped off a cliff and took 3.59s to fall to the water below. neglecting air resistance how far in meters did it fall how far is it down to water
Monday, June 18, 2012 at 5:21pm

to ms.sue
this is the 2012 project. the one i gave u was a 2010-2011 project Summer Science Poster Please select one of the four solar-energy-based topics listed below to research. Based on your research you are to create a poster that details what you learned. Please make a ...
Monday, June 18, 2012 at 4:44pm

physical science
how much kinetic enery will the crate have as it fall and hits the floor rasing a 35kg crate a distance of 1.5m above storeroom floor
Monday, June 18, 2012 at 3:50pm

physical science
a ball was dropped off a cliff and took 3.59s to fall to the water below. neglecting air resistance how fast in m/s was the ball moving just as it hit th water
Monday, June 18, 2012 at 3:00pm

physical science
if a ball is thrown straight up at a speed of 34.7m/s how long in seconds will it continue to rise before it starts to fall back down?
Monday, June 18, 2012 at 1:18pm

Science
An Object of mass 0.5kg is whirled at the end of string 0.8m long. If the strings makes three revolutions in 1.2sec, find the tension in the string.
Monday, June 18, 2012 at 7:28am

science
what animals dont have a circulatory system. please answer fast thank you
Sunday, June 17, 2012 at 7:23pm

Science
Ms. Sue I understand, but what the professor requested was the following: NOTE: In the “Sample: Outline,” it states that the thesis statement is the last one to three sentences of the introduction. However, the thesis statement must be one sentence in length and the ...
Sunday, June 17, 2012 at 5:43pm

physical science
an object is observed to fall from bridge striking the water below 2.25s later with what velocity speed did it strike the water
Sunday, June 17, 2012 at 12:58pm

science
an arrow is shot into air. its range is 200m and its time of flight is 5s . if g=10m/s2 ,then horizontl compoent of velocity and the mximum height will be
Sunday, June 17, 2012 at 6:52am

science
describe the mixture that resulted after mixing.
Sunday, June 17, 2012 at 12:52am

Physical Science
1. Which is faster,160 miles an hour or 300 inches a second? 2. An athlete ran a 15-km race in 48 minutes and 24 seconds. What was his average speed for the race in miles per hour? 3. A banana weighs 75 grams. If you buy 12 bananas and they sell for 75 pesos per kilogram, how ...
Saturday, June 16, 2012 at 11:12am

science
name any 10 appliances that work on the concept of latent heat of vaprization and vaporization??
Saturday, June 16, 2012 at 3:06am

Science
Writeacher, I urgently need you to check these sentences, though I believe they don't make sense. Although I'm not a mechanic, I don't think the use of scientific English is correct. 1) I would like to focus on a kind of technology which is used to increase the ...
Friday, June 15, 2012 at 4:15pm

Physical Science
1. You are assigned to take care of a patient who is scheduled to undergo a surgical operation. The doctor told you not to allow the patient to eat for twelve hours. How many minutes is the fasting period? 2. What is the density of a rock (in g/cm3) which has a volume of 2.5 ...
Friday, June 15, 2012 at 11:50am

science
A 51-g piece of ice at 0 C is added to a sample of water at 7-C all of the ice melts and the temp of the water decreases to 0 .If you used the 8200 Khan you expand in energy in one day to heat 47000g of water at 27-C what would be the rise in temp? What would the new temp of ...
Friday, June 15, 2012 at 10:43am

Physical Science
What are the different kinds of overlapping sciences?
Friday, June 15, 2012 at 6:48am

science
I need help to prepare survey report on "use of mobiles are the need of an hour". Report should contain questions asked during survey, graphical representations etc.
Friday, June 15, 2012 at 2:36am

physical science
determine the amount of gravity of two bobies whose mass is 10 grams each and are 10 cm apart?
Thursday, June 14, 2012 at 11:07pm

Earth Science
Scientists tell us that the Earth is suffering ill effects from ozone depletion and the greenhouse effect. Compare these two phenomenons. What aspects do they have in common? How might they actually help eah other to produce conditions in which humans and plants would find it ...
Thursday, June 14, 2012 at 12:02pm

science
1. Do you know what is the origin of the word "HiRobo"? It is a robot. 2. Do you know the origin of the word "PaPeRo'? She is a robot made in Japan.
Wednesday, June 13, 2012 at 10:44pm

science - chemistry
How much limestone will you need to neutralize lakes, using Snells law formula, and how would you draw that out?
Wednesday, June 13, 2012 at 9:20pm

Essay:)
Topic: Compare and Contrast the Tang and song dynasties China? The Tang Dynasties (June 18,618-June 4,907)was an imperial dynasty of china preceded by the Sui Dynasty and followed by the Five Dynasties Ten Kingdoms period. It was founded by the cifamily. In chinese history, ...
Wednesday, June 13, 2012 at 3:25pm

science
Clay is a plastic material. Does thia imply that it is a polymer
Wednesday, June 13, 2012 at 11:02am

Earth Science
How old is the Gneiss in Greenland?
Tuesday, June 12, 2012 at 10:28pm

Earth Science
Which of the following processes helps to shape the landforms of Earth? - Mass movement - Glaciers - Wind - All of the above
Tuesday, June 12, 2012 at 6:53pm

Science
How do you test the properties of an unknown material?
Tuesday, June 12, 2012 at 6:37pm

science
an electrical energy supplied to a toy car was 240 joules.If the car weighing 40N moved through a distance of 5m,calculate the efficiency
Tuesday, June 12, 2012 at 4:08pm

SCI/256 PEOPLE, SCIENCE, AND THE ENVIRONMENT
What are some social, economic, aesthetic, and ethical issues involved in a current environmental controversy? Explain.
Tuesday, June 12, 2012 at 12:02pm

physical science
Which of these is the balanced equation for this reaction? A. B. C. D.
Tuesday, June 12, 2012 at 8:42am

science
Is 2-methyl-2-choloropropane polar or nonpolar?
Sunday, June 10, 2012 at 8:30pm

science
what would the equation be if you dropped an object from 100,000 meters above the ground
Sunday, June 10, 2012 at 6:59pm

Finals
English 7 - June 11 Social Studies 7 - June 12 Math 7 - June 13 Science 7 - June 15 Just to let you know.
Sunday, June 10, 2012 at 3:51pm

Science (simple machines)
The plank is 3.6 metres long. It is being used as a lever to lift a 40-kilogram box. This represents a load of 400 newtons. (a) If the fulcrum were placed in the centre of the plank, what downward effort would the man on the right need to apply to raise the box? (b) If the man...
Sunday, June 10, 2012 at 12:58pm

science
Describe a rocket propelled in 30 degrees north of east with a velocity of 5m/s
Sunday, June 10, 2012 at 11:03am

science
A ball hit by a player too 2.4s to reach the short stop from home plate. If the short stop threw the ball to first base at a speed of 20m/s, a distance of 30m, how long would the runner have to make it to first base and arrive at the same time as the ball. (the answer is in ...
Saturday, June 9, 2012 at 11:14pm

Science-Nerve Cells
Descibe how an electrical impulse travels through a nerve and between nerves.
Saturday, June 9, 2012 at 1:45pm

science
which if the following stars is brightest Nova, white dwarf, red giant, or main sequence
Friday, June 8, 2012 at 1:26am

science
what do you call a river or stream that runs or flows really fast?
Thursday, June 7, 2012 at 8:42pm

Science
I left out the following statements. Thank you very much, Ms. Sue 1) The researchers in a group led by Paro, crossed the files of six generations. Thanks to this experiment, they were able to prove the temperature treatment changes the eye of colour of this specific strain of ...
Thursday, June 7, 2012 at 6:55pm

Art
Could you please check scientific English in this short dissertation? Thank you, Ms. Sue. 1) Conrad Waddington introduced the term epigenetics in the early 1940s. He defined epigenetics as ‘‘the branch of biology which studies the causal interactions between genes ...
Thursday, June 7, 2012 at 6:52pm

Art
Ms. Sue, I need to include these sentences I posted a few days ago to Writeacher. Thank you very much! 1) I'm forwarding you the link to the European Etwinning certificate of quality. 2) Online projects carried out among two or more European schools can be eligible to ...
Thursday, June 7, 2012 at 8:41am

science
What is the cell potential and voltage gradient?
Wednesday, June 6, 2012 at 6:37pm

science
how you use muscular power in school activities
Wednesday, June 6, 2012 at 3:48am

Science - plzzzzzzzz read!!
why are there fewer organisms as you move toward the top of the energy pyramid? answer - As you move up the pyramid the transfer of energy (10 pct per level is transfered) is less efficient & each level becomes smaller. am i correct???? (please be honest)
Tuesday, June 5, 2012 at 9:42pm

Science - help!!!!!!!!!!!
every stage is eventually returned to which final stage?
Tuesday, June 5, 2012 at 9:37pm

Science 7R - HW Qs. Check (Q2)
why are there fewer organisms as you move toward the top of the energy pyramid? answer - As you move up the pyramid the transfer of energy (10 pct per level is transfered) is less efficient & each level becomes smaller. am i correct???? (please be honest)
Tuesday, June 5, 2012 at 9:05pm

Science 7R - HW Qs. Check (plzzz read!)
what are the carnivores shown in this food web? answer - mountain lion, hawks, deer, snakes am i correct?????? btw ---- i found it in the food web in my worksheet
Tuesday, June 5, 2012 at 9:00pm

to ms.sue-project
After reading Holes by Louis Sachar, you will complete the book reporting bingo assignment. You will select any five boxes in a row from the board, in any direction across, down, or diagonally, to create a bingo. Each assignment must: •Be neat •Be complete •Be ...
Tuesday, June 5, 2012 at 9:00pm

Science
Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain (see page 79 in the Laboratory Manual). The initial temperature of the parcel at sea level is 76.5°F, and the lifting condensation level (LCL) of the parcel is 3000 feet. The DAR is 5.5°...
Tuesday, June 5, 2012 at 5:32pm

Art
Could you please check these few sentences, Writeacher. Thank you. 1) I'm forwarding you the link to the European Etwinning certificate of quality. 2) Online projects carried out between two or more European schools can be eligible to receive both a national and a European...
Tuesday, June 5, 2012 at 4:12pm

physical science
speed decreases as distance decreases for the same time true or false
Tuesday, June 5, 2012 at 2:44pm

Art
Could you please check these few sentences. Thank you. 1) I'm forwarding you the link to the European Etwinning certificate of quality. Online projects carried out between two or more European schools can be eligible to receive both a national (in 2) Our participating ...
Tuesday, June 5, 2012 at 2:14pm

Science/Biomaterials
Hooke's law relates the amount of strain a material to the absolute amount of force applied. True or False?
Tuesday, June 5, 2012 at 12:23pm

science- physics helppppp ! i badly need one T___T
how is physics related to food technology and everything related to foods ?
Tuesday, June 5, 2012 at 7:33am

Science- please help
compare four examples of technologies that are designed to make buildings earthquake resistant
Monday, June 4, 2012 at 9:14pm

Science - help!!!
why there are fewer lions than gazelles on the african plains????
Monday, June 4, 2012 at 8:59pm

Science HW qs. Check (plzzzz read!!!!)
1. How does the flow of energy through an ecosystem compare with cycling of matter? i put energy moves through an ecosystem in the form of food am i correct??????????
Monday, June 4, 2012 at 8:29pm

science-check
what is the advantages and disadvantages of using sand to grow? the advantage is that it anchors it? the diadvantage is it cant hold the plant up?
Sunday, June 3, 2012 at 9:48pm

science-hydroponics
what is the advantage and disadvantage of growing plants with sand?
Sunday, June 3, 2012 at 9:08pm

science- hydroponics
the advantage of gravel is that it makes it better to grow plants that you eat? the disadvantage of gravel is that gravel can not hold the plant?
Sunday, June 3, 2012 at 8:53pm

science-hydrophonics
the advantage of gravel is : the disadvantage of gravel: the advantage of sand the disadvantage of sand
Sunday, June 3, 2012 at 7:35pm

Science/Biomaterials
Given the following properties, how much stretch would you expect to occur in a specimen of polyethylene to which a tensile load is applied? l = change in length Length = 10 cm Cross-Sectional Area = 1 cm2 Young's Modulus = 200 GPa Applied Load = 1000 kN Find answer in cm...
Sunday, June 3, 2012 at 7:24pm

Science/Physics
Explain why a rapidly spinning gyroscope, mounted in a frame that allows it to rotate in any direction independently of the frame’s rotation, tends to maintain its axis pointed in the same direction in space. I just am not getting this!
Sunday, June 3, 2012 at 7:15pm

Science
Can you please check if my part on science is grammatically correct? Thank you very much, Writeacher. 1) In 1951 an American woman descended from African slaves freed named Henrietta Lacks, was admitted to Johns Hopkins Hospital in Baltimore. 2) In those years, scientists had ...
Sunday, June 3, 2012 at 4:58pm

Science - HW qs. check
6. What happened to the population of deer when the wolves were introduced? Explain why? When the wolves are introduced, the population of deer will decrease because wolves eat deers??? right?????
Sunday, June 3, 2012 at 3:32pm

Science - Homework Qs.
2. What happens to the population of a species when these resources decrease? my answer - when the resources decrease the population of the species will be dead right?????? (please be honest)
Sunday, June 3, 2012 at 3:29pm

Science - HELP!!!!
in general, are wildlife population constant or do they tend to fluctuate? Explain. In science on friday we played this game called "Oh Deer". If you google it and click on the first one and read it you'll get a better understanding. please help im struggling ...
Sunday, June 3, 2012 at 2:52pm

Art
I need to prepare a short dissertation on the dystopian novel and the theme of totalitarianism or subordination (the parody of Stalin, Hitler, Winston Smith and Winston Churchill). Here is a short summary of Huxley’s novel “Brave New World”. Could you please ...
Sunday, June 3, 2012 at 11:08am

Art
Writeacher, I urgently need you to help me find material (for intermediate English learners) on the following themes: 1)The theme of doping in cyclism. 2)The Jazz Age 3) Allen, co-founder of the Brain Science Institute
Saturday, June 2, 2012 at 5:38pm

science
Mountains produced by tensional stress, like the Teton Range in Wyoming, are called
Saturday, June 2, 2012 at 11:24am

science material
for the following composite material stressed under isostrain conditions. The composite consists of a continuous glass‐fiber‐reinforced‐;epoxy resin produced by Using 60 percent by volume of E-glass fibers having a modulus of elasticity of Ef =7.24&...
Friday, June 1, 2012 at 3:24pm

Science
A boy lift a box that weighed 40 newtons if the boy was 1.5 meter tall how much work did he do as he lift the box?
Friday, June 1, 2012 at 1:56pm

science material
Calculate the modulus of elasticity for a composite material consisting of 60 percent by volume of continuous E-glass fiber and 40 percent epoxy resin for the matrix when stressed under isostress conditions. The modulus of elasticity of the E glass is 72.4 GPa and that of the ...
Friday, June 1, 2012 at 8:14am

Science 7R - HW Check
most plants grow best in soil that contains large amounts of sand???? right??? or humus
Thursday, May 31, 2012 at 9:54pm

Science HELP! (plzzz read!)
What is a major factor in determining where green plants and protist live?
Thursday, May 31, 2012 at 9:52pm

Science HW Qs. Check (plzzz read!)
The bodies of almost all organisms are 50 to 95 percent what? answer - water am i correct????
Thursday, May 31, 2012 at 9:49pm

Science (plzzzzz read!!)
abiotic factors help determine which species can what?
Thursday, May 31, 2012 at 9:42pm

Science 7R - HW Qs. Check
1. The biosphere includes all the air, land, and water where ____ exist a) soil b) coral c) an abiotic facter d) life My Answer - a (or b....) am i correct??????
Thursday, May 31, 2012 at 6:34pm

Science 7R - help!
within the biosphere there are many different what?
Thursday, May 31, 2012 at 6:28pm

SCIENCE
HOW DO I CALCULATE THE PRESSURE EXERTED BY AN OIL EXPELLER ON THE OILSEED TO BRING OUT THE OIL
Thursday, May 31, 2012 at 3:44pm

science
tell me about beluga whale pods not beluga whales.
Thursday, May 31, 2012 at 11:38am

science material
Explain in detail the process of polymerization.
Thursday, May 31, 2012 at 6:29am

science
Which of the following is not responsible for nitrogen fixation? a. Action of lightning on atmospheric nitrogen and oxygen b. industrial production of nitrohen based fertilisers c.rhizobium bacteria found in the root nodules of clover plants dentrifying bacteria found in the ...
Thursday, May 31, 2012 at 5:11am

Science
Could you please check these sentences on LSD? Thank you, Writeacher. 1) LSD is a psychoactive substance capable of generating perceptual alterations. It was synthesized for the first time in 1938 by Albert Hoffman of Sandoz laboratories in Basel. 2) The full name of that ...
Wednesday, May 30, 2012 at 6:53pm

Earth Science
Environmental Sustainability” refers to the ______________ of vital human ______________ support systems. fill in the blank
Wednesday, May 30, 2012 at 1:31pm

science material
. Calculate the following: a. the modulus of elasticity, b. the tensile strength, c. the fraction of the load carried by the fiber, for the following composite material stressed under isostrain conditions. The composite consists of a continuous glass‐fiber‐...
Wednesday, May 30, 2012 at 1:09pm

Science
An electric dipole of dipole moment 20*10^-6c.m. Is enclosed by a closed surface .what is the net flux coming out of the surface?
Wednesday, May 30, 2012 at 1:28am

Chemistry Science
A sample of the element ygfjygg m has a mass of 5.6 g +/- .1 g and a volume of 3.1 cm3 +/- .5 cm3. The true density of Lindeminium is 1.92 g/cm3. ----HOW TO CALCULATE RANDOM ERROR(18%)?---
Tuesday, May 29, 2012 at 10:57pm

Chemistry Science
. When a 28.7 g sample of KI dissolves in 60.0 g of water in a calorimeter, the temperature drops from 27.2oC to 13.2 oC . Calculate ΔH for the process.
Tuesday, May 29, 2012 at 10:54pm

science
A solution has a density of 1.50 g/mL. How many grams are needed to obtain 10.0 mL of solution?
Tuesday, May 29, 2012 at 8:21pm

world geography
state farms in communist europe were run by: a. small independent collectives b. individuals c. the government d. specialists in enviromental science
Tuesday, May 29, 2012 at 8:21pm

science
the threat of global warming is mainly associated with ? 1 radioactive wastes 2 use of hydroelectric energy 3 burning of fossil fuels 4 thermal pollution of lakes and rivers
Tuesday, May 29, 2012 at 7:44pm

science
What 2 things do plants need to grow and thrive?
Tuesday, May 29, 2012 at 7:38pm

Science
Please for a labeled diagram of aweather thermometer.
Tuesday, May 29, 2012 at 6:56pm

Chemistry Science
A 15.0 g sample of an unknown compound is dissolved in 100.0 g of benzene. The boiling point is raised 2.67 oC above the boiling point of pure benzene. What is the molar mass of the sample? Kb for benzene is 2.67oC/m.
Tuesday, May 29, 2012 at 5:35pm

science
how far merkurius to mars
Tuesday, May 29, 2012 at 3:07am

Art
Writeacher, I urgently need you to check these sentences. Thank you very much. 1)After that we are going (we'll go?which form would you use to describe your summer holiday?) on a guided tour of the science museum. 2) We'll spend some time in the city centre doing ...
Monday, May 28, 2012 at 6:33pm

Science
Thank you very much for your help. I will check major grammar mistakes tomorrow morning. Can you please have a quick look at the second part and tell me which sentences need to be revised? 1) However, their most striking feature was that these cells were able to reproduce and ...
Monday, May 28, 2012 at 6:22pm

Science
Writeacher, I urgently need to check this part regarding a scientific topic. I hope you can help me. Here is the first part. 1) In 1951 an American woman descended from African slaves freed named Henrietta Lacks, was admitted to Johns Hopkins Hospital in Baltimore. In those ...
Monday, May 28, 2012 at 5:38pm

Science: Chemistry
What does the nose detect when it "smells" something? Explain and give evidence to support your answer.
Monday, May 28, 2012 at 3:30pm

Science: Chemistry
What does the nose detect when it "smells" something? What evidence is there support your answer?
Monday, May 28, 2012 at 3:06pm

Science-Physics
One of the things that helped our understanding of radioactivity was the discovery of the electron in 1897. The 100th anniversary of this important discovery was celebrated widely in 1997. Explain why more people were aware of the 100th anniversary than of the original discovery.
Monday, May 28, 2012 at 2:17pm

Science
Please respond I have this last question and then I can be done this course Using absolute dating,a fossil is dated to be 3million years old and decomposed 1half-life. If it takes the same fossil 12million years to decompose to 4half-lives, how old will it be when it is ...
Monday, May 28, 2012 at 11:59am

Chemistry Science
A piece of iron with a mass of 35 g is heated to 1305oC and then placed in a calorimeter containing 600 g of water. The temperature of the water increases from 25oc to 33oC. The specific heat of water is 4.184 J/g X C. Calculate the specific heat of the iron.
Sunday, May 27, 2012 at 9:41pm

Science
Please may you find a labeled diagram of a weather thermometer.
Sunday, May 27, 2012 at 6:53pm

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