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April 18, 2014

Homework Help: Science

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Recent Science Questions

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Science URGENT PLEASE
Thank u so much :)
Wednesday, March 19, 2014 at 7:28pm

Science question, only 1
I think we would starve because no plants would grow but maybe die from no conversion of CO2 to C and O2 without photosynthesis first.
Wednesday, March 19, 2014 at 7:24pm

Science URGENT PLEASE
1. sour, acid <7 2. H+ and O-2 sort of H3O+ and O-2 is another way to look at it 2 b H O H because that is shape of molecule 2 c same number of 2 H+1 as O-2 3 a H+ up 3 b beats me, why should it change? 3 c OH- up, what else is new? 4 http://facultyfp.salisbury.edu/dfrieck/...
Wednesday, March 19, 2014 at 7:13pm

Quick Science Question - Never mind
Never mind, I got the answer correct, the machine is a suspended pulley. Thanks though, if any of you tried to help. :)
Wednesday, March 19, 2014 at 7:09pm

Science URGENT PLEASE
1. what would you expect the pH value for grapefruit juice to be? (>7, 7, <7) 2. A.) Which two ions are present in very small amounts in any sample of pure water? b.) what is a good alternative chemical formula for water rather than H2O? Why? c.) with respect to ion ...
Wednesday, March 19, 2014 at 7:01pm

Science question, only 1
What would be the consequence of an ecosystem that had no nitrogen-fixing bacteria? Nitrogen from decomposing animals would never be returned to the soil. Decomposers would not be able to break down the nitrogen present in plants they feed on. Plants would have to rely on ...
Wednesday, March 19, 2014 at 6:23pm

Quick Science Question
I have a question. Is a Atwood Machine a suspended pulley? I have question asking me what the machine is, and there are two answers with the word pulley in them. I am really confused between the two. I have tried looking it up, and I get confused again because I don't ...
Wednesday, March 19, 2014 at 5:45pm

Science!
NO DONT!!!!WAIT!!!!!!!!!!!! 4. A!!!!! 7. C!!!!! I JUST DID THIS TODAY!!!!!
Wednesday, March 19, 2014 at 5:19pm

Science!
Ok, then I'll just say these answers.. i guess..
Wednesday, March 19, 2014 at 5:13pm

science help pleasee
isn't it also ionic bonds too with the hydrogen ions? i dont really understand it
Wednesday, March 19, 2014 at 4:50pm

science
6*300
Wednesday, March 19, 2014 at 4:43pm

Science!
It didn't show very well, but D is my answer for 5.
Wednesday, March 19, 2014 at 4:43pm

Science!
2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <---- 3. Which of the following describes the relationship between friction and inertia? When there is more friction, there is less inertia When there is less ...
Wednesday, March 19, 2014 at 4:42pm

science help pleasee
Mostly covalent
Wednesday, March 19, 2014 at 4:40pm

science
A meteorite weighs 300 Newtons on the moon. the moons force of gravity is 1/6 that of earth. what is the meeorites weight on earth?
Wednesday, March 19, 2014 at 4:39pm

science help pleasee
what type of bonding is phosphoric acid?
Wednesday, March 19, 2014 at 4:27pm

Science- Brady , Ms. Sue , Damon
You're welcome, Mindy! :)
Wednesday, March 19, 2014 at 3:35pm

science
Hey
Wednesday, March 19, 2014 at 2:50pm

Science
I think it's limiting factors but I'm not sure..
Wednesday, March 19, 2014 at 2:34pm

Science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support.
Wednesday, March 19, 2014 at 2:31pm

Science
Model from Part (a) is dC/dt = E - (C/tau) C - concentration of the gas [Tg] E - emission rate [Tg/yr] t - time [yr] tau - represents the lifetime of the gas in the atmosphere, before it is removed, either by chemical reactions or deposition to the surface [yr]
Wednesday, March 19, 2014 at 2:10pm

Science
CFC-11 and CFC-12 are very potent greenhouse gases. Suppose the emission of 1 Tg of CFC-11 causes a 1.0 W m-2 instantaneous perturbation in the radiation budget. The emission of the 1 Tg of CFC-12 causes a 1.5 W m-2 radiative forcing. The 100 year global warming potential for ...
Wednesday, March 19, 2014 at 1:58pm

Science
The total amount of ice in the Greenland ice sheet is estimated to be 2.85 million cubic km. Assume the Earth's surface is 70% covered by ocean, and that the Earth's radius is 6300 km. How many meters would sea level rise if the entire Greenland ice sheet were to melt...
Wednesday, March 19, 2014 at 1:57pm

Science
As long as you are saying "any," I would choose 1.
Wednesday, March 19, 2014 at 1:38pm

science question
indicator? Independent variable? determiner?
Wednesday, March 19, 2014 at 1:23pm

science quiz pls help!!!
i agree with al of them but 3 and 7
Wednesday, March 19, 2014 at 11:54am

SCIENCE 1 QUESTION PLS HELP!!!!!
Thank you, Anonymous!!!!! it was right!:)
Wednesday, March 19, 2014 at 11:36am

SCIENCE 1 QUESTION PLS HELP!!!!!
C
Wednesday, March 19, 2014 at 11:20am

SCIENCE 1 QUESTION PLS HELP!!!!!
3. Which of the following describes the relationship between friction and inertia? (1 point) When there is more friction, there is less inertia. When there is less friction, there is more inertia. When there is more friction, there is more inertia. When there is no friction, ...
Wednesday, March 19, 2014 at 11:17am

Physical Science
The current in a toaster oven is 15 A when plugged into an electrical outlet that is 110 V. How much electric power is used by the toaster oven? Formula: P = IV
Wednesday, March 19, 2014 at 8:26am

Physical Science
well, if you buy into the fact that red+green+blue = white then the complement of any secondary color is the unused primary color.
Wednesday, March 19, 2014 at 6:00am

Physical Science
When mixing colors of light, why does combining a secondary color with its complementary color give white light? I can't find the answer in my book, please help!
Wednesday, March 19, 2014 at 2:48am

Science
for the question 17 the answer is heat
Wednesday, March 19, 2014 at 1:36am

science
A liquid has a fixed volume, but not a fixed shape.
Tuesday, March 18, 2014 at 11:08pm

science question
If changing conditions lead to decreased oxygen levels in a stream, the carrying capacity of the stream for fish will decrease. Oxygen level in water is therefore a ______with respect to the number of trout that stream can support. Any idea?
Tuesday, March 18, 2014 at 10:35pm

physical science
Suppose you are camping in the mountains and you need to melt 1.8 kg of snow at 0.0 degC to 70.0 degC. The specific heat of water is 4186 j/kg*C while the latent heat of fusion for water equals 3.34 x 10^5 J/kg. How much heat will be needed? Express in KJ.
Tuesday, March 18, 2014 at 10:30pm

science help
No, I haven't read about the Amazon. I'm confused. So if they are renewable, they will just grow back but if they are not renewable they are just gone and other plants start competing. And that's how non-renewable and renewable resources effect biodiversity??
Tuesday, March 18, 2014 at 10:26pm

science help
why are acids and bases good conductors of electricity?
Tuesday, March 18, 2014 at 10:25pm

science help
why does the more oxygen mean more fish? And just because there is more fish, why does that mean there will be MORE birds? I get that the fish eat the birds, but how's that make more birds?
Tuesday, March 18, 2014 at 10:22pm

science help
greater O2, more fish, more fish thence more birds to eat them.
Tuesday, March 18, 2014 at 10:16pm

science help
Have you read about the Amazon (duh a biodiverse environment) being cut down to grow row crops? Row crops are renewable. What happened to biodiversity? Non renewable: What about oil..when it is gone, we cant make chemical fertilizers, then what grows without fertizizer? Answer...
Tuesday, March 18, 2014 at 10:15pm

science help
Renewable resources are resources that are available again and non-renewable are ones that can't be replaced.How do these effect biodiversity? If a non-renewal can't be replaced, I can understand that once it's gone, it's not avaialable, but what about the ...
Tuesday, March 18, 2014 at 10:01pm

science help
If water temperature changes in favor of greater oxygen levels how do the population of the fish and wading bird population change in response to the new oxygen over time? I would think the fish population would increase and so would the birds (because the fish increase) but I...
Tuesday, March 18, 2014 at 9:56pm

science(check ansers)
Were these right?
Tuesday, March 18, 2014 at 9:09pm

Science
People kept on finding out new things about the atoms so when nuetrons came into place they had to make a new model.
Tuesday, March 18, 2014 at 9:08pm

Science
What type of a bond is a metal cation likely to form?
Tuesday, March 18, 2014 at 8:58pm

Science
How did the discovery of neutrons change the atomic model?
Tuesday, March 18, 2014 at 8:56pm

science
What describes the charecteristics of a liquid? A.) It has a fixed volume and shape. B.) It has high energy and expands to fill the container. C.) It has fixed volume and varied shape. D.) It has no fixed volume or shape.
Tuesday, March 18, 2014 at 8:31pm

Physical Science
You are correct, a closed system is a system (anything is a system) that is almost completely closed off from its surroundings, note I said ALMOST. Nothing is completely closed off. So what is a closed off system? It is a system that lets nothing come in and nothing come out. ...
Tuesday, March 18, 2014 at 8:20pm

Science
1. Where is the Earth's equator located today? Describe the climatic conditions. 2. Compare and contrast the climatic conditions existed during this time today. 3. Answer: What types of fossils would you expect to find here? Explain why based on the animals' ...
Tuesday, March 18, 2014 at 8:13pm

Science
Respiration, Photosynthesis, and Decomposition are your answers! You're welcome!!! *mumbles to self NAILED IT!!!*
Tuesday, March 18, 2014 at 7:00pm

Science
For carbon to move from an animal to a car, what processes need to happen? Photosynthesis, combustion, and respiration? Respiration, fossilization, and photosynthesis? Fossilization, decomposition, and respiration? Or respiration, photosynthesis, and decomposition?
Tuesday, March 18, 2014 at 6:31pm

Science
For carbon to move from an animal to a car, what processes need to happen? Photosynthesis, combustion, and respiration? Respiration, fossilization, and photosynthesis? Fossilization, decomposition, and respiration? Or respiration, photosynthesis, and decomposition?
Tuesday, March 18, 2014 at 5:28pm

Science/Chemistry
Is this equation balanced? Does it show that no atoms are lost or gained in chemical reactions? 8Fe + S8 --->8FeS
Tuesday, March 18, 2014 at 4:53pm

Science
Which of the following is a mechanism used by humans to defend against any disease-causing organism 1)the creation of antibodies 2)the injection of vaccines 3)the production of mucus membranes 4)the use of antibiotics
Tuesday, March 18, 2014 at 3:00pm

science
Please help balance this: CH3COO + CrO4 + H = Cr(OH)3 + CO2 + H2O
Tuesday, March 18, 2014 at 2:39pm

science
1. Is false, READ THE LAST PART CAREFULLY. the green ball does not change direction because the RED BALL HAS MORE MOMENTUM. why would the red ball have more momentum???
Tuesday, March 18, 2014 at 2:24pm

Science
Artificial Selection leads to loss of Genetic Variation? or Genetic Equilibrium?
Tuesday, March 18, 2014 at 2:16pm

science quiz pls help!!!
actually, 2 is correct cuz it was for a quick check and it was 100 kg... 4. ??? is it one of my options i chose? 7. ??? if its not the ones i had an option for i think its c? the answer that is correct such as 8. is the one that doesnt have the ? after the ***
Tuesday, March 18, 2014 at 2:14pm

science
Three point charges are placed on the x-axis. A charge of +2.0 μC is placed at the origin, -2.0 μC to the right at x = 50 cm, and +4.0 μC at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin? ...
Tuesday, March 18, 2014 at 1:46pm

science quiz pls help!!!
i agree except with numbers 2 4 7
Tuesday, March 18, 2014 at 1:15pm

science quiz pls help!!!
In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum. True False***? 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s*** 3. Which of...
Tuesday, March 18, 2014 at 12:30pm

Science -Check Answers-
i know 1 -3 is right but i dont know the rest, is this connections academy?
Tuesday, March 18, 2014 at 11:29am

Math? Science?
??
Tuesday, March 18, 2014 at 11:07am

Science
Some water molecules are split into hydrogen and oxygen when going from: A. Atmosphere to clouds B. Ocean to atmosphere C. Ground water to surface water D. Surface water to biosphere EXPLAIN!
Tuesday, March 18, 2014 at 11:01am

science
30 cubic meters of argon gas are kept under constant pressure. The gas is heated from 10.0 degrees Celsius to 293 degrees Celsius. What is the new volume of the gas?
Tuesday, March 18, 2014 at 10:44am

Science
how did the discovery of nutrons change the atomic model
Tuesday, March 18, 2014 at 9:46am

Science
what type of bond is a metal cation likely to form?
Tuesday, March 18, 2014 at 9:42am

science
Describe an experiment you might perform to determine which leg muscles of a frog are important for jumping long distances.
Tuesday, March 18, 2014 at 4:05am

Science/Chem
2.408E24
Monday, March 17, 2014 at 11:57pm

Science
1. In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum. True <---- False 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <...
Monday, March 17, 2014 at 11:56pm

Science -Check Answers-
1. In the following diagram, the green ball changes direction after colliding with the red ball because the red ball has more momentum. True <---- False 2. What is the momentum of a 20.0 kg scooter traveling at 5.00 m/s. 4.00 kg m/s 20.0 kg m/s 25.0 kg m/s 100 kg m/s <...
Monday, March 17, 2014 at 10:38pm

Science asap
Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? nitrogen-fixing bacteria denitrifying bacteria decomposers producers Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication ...
Monday, March 17, 2014 at 10:31pm

human resources
ABC science, concerned about higher and higher health care costs has decided to implement the following changes in their employment relationships with ABC employees: 1. Employees must stop using tobacco products and the company will immediately prohibit on site use of tobacco ...
Monday, March 17, 2014 at 10:21pm

Science
I think its c
Monday, March 17, 2014 at 9:52pm

Science
There is a theoretical protein called largeX that helps to stimulate growth of the body during adolescence. The promoter on the lrgX gene that codes for it is normally able to have a protein bind to it that promotes transcription called largene. Largene, bound to the promoter...
Monday, March 17, 2014 at 9:06pm

6th grade - Lang Arts
Can you check the following? Find the verb phrase 1. Will you buy me a drink? ans: will buy 2. Sam is not going to the dance. ans: is going 3. Al should have mowed the lawn today. ans: should have mowed 4. Theresa will be playing her clarinet at the concert tonight. ans: will ...
Monday, March 17, 2014 at 8:55pm

Science
Also, can anyone explain this?
Monday, March 17, 2014 at 8:42pm

Science
Which of the following happens when a low-mass star runs out of fuel? Choose all that apply. A. Its core becomes a white dwarf B. Its outer layers form a nebula, or vast cloud of gas and dust C. its outer layers expand, and the star becomes a red giant D. gas and dust in a ...
Monday, March 17, 2014 at 8:40pm

Physical Science 9
what type of bond is a metal cation likely to form?
Monday, March 17, 2014 at 8:29pm

Physical Science 9
how did chadwicks discovery of nutrons change the atomic model
Monday, March 17, 2014 at 8:16pm

Physical Science 9
In an ionoic bond how many valence electrons would an atom have?
Monday, March 17, 2014 at 8:03pm

Science
(a) What magnitude of force must the worker apply? (b) How much work is done on the crate by this force? (c) How much work is done on the crate by frication? (d) How much work is done on the crate by normal force? (e) How much work is done on the crate by the gravity? (f) What...
Monday, March 17, 2014 at 7:03pm

Science
A factory worker pushes a 29.2kg crate a distance of 4.1m along a level floor at constant velocity by pushing downward at an angle of 28* below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.25.
Monday, March 17, 2014 at 7:02pm

physical science
Period = 1/f = (1/5.3)10^-14 seconds distance = speed * time lambda = 3*10^8 m/s * (1/5.3)* 10^-14 = .566 * 10^-6 meters = 566 * 10^-9 meters 10^-9 meters is nanometers, usually used for visible light wavelength
Monday, March 17, 2014 at 4:59pm

science i try i have no idea
Try a dictionary or Google.
Monday, March 17, 2014 at 4:46pm

physical science
Green light has a frequency of about 5.3Hz~10Green light has a frequency of about 5.3Hz~ 10^{14}. Using the relationship speed of light (c)=fƒÉ find its wavelength in air.
Monday, March 17, 2014 at 4:17pm

science
A) atmosphere
Monday, March 17, 2014 at 2:15pm

Physical Science
This is the trouble with OTEC (Offshore Thermal Energy Conversion) where the difference in temperature between deep ocean water and water at the surface (in tropics of course) can be used to run a turbine system and generate electricity or whatever. However the efficiency is ...
Monday, March 17, 2014 at 2:06pm

Physical Science
heat in = SH * m * delta T SH = heat in / ( m* delta T)
Monday, March 17, 2014 at 1:38pm

Physical Science
go boom !
Monday, March 17, 2014 at 1:36pm

Physical Science
heat out = specific heat of water * mass of water * (30-0)
Monday, March 17, 2014 at 1:36pm

Physical Science
Heat out = Specific heat of ice * mass of ice * change in temp
Monday, March 17, 2014 at 1:34pm

Physical Science
P V = n R T well, R does not change :) R = P V/(nT) = P' .5V /(.5n 2T) = P'(.5)V/(nT) so .5 P' = P P' = 2 P
Monday, March 17, 2014 at 1:33pm

Physical Science
greater than Carnot cycle 1 - (Tcold/Thot) T in KELVIN (dge C + 273)
Monday, March 17, 2014 at 1:30pm

Physical Science
if you mix hot and cold water and get warm water the entropy is higher, even if the energy did not change. The availability of that energy is what changed. Between a glass of hot water and a glass of cold water you can run an engine. However there is not much you can do with a...
Monday, March 17, 2014 at 1:28pm

Physical Science
increase
Monday, March 17, 2014 at 1:23pm

Physical Science
The entropy of an isolated system always do what when natural processes occur?
Monday, March 17, 2014 at 12:34pm

Physical Science
The second law of thermodynamics forbids a heat engine to have thermal efficiency of what?
Monday, March 17, 2014 at 12:34pm

Physical Science
A sample of gas has its number of molecules halved, its Kelvin temperature doubled, and its volume halved. What is the new pressure, relative to the original pressure?
Monday, March 17, 2014 at 12:33pm

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