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April 18, 2014

Homework Help: Science

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Recent Science Questions

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science URGENT so need help
PLS HELP ASAP True or False 1. If a 40 kg person is accelerating at 10 m/s2, then the magnitude of the force acting on him or her is 400 N. (1 point) true false Multiple Choice 2. How much force is needed to make a 60 kg object accelerate at a rate of 2.0 m/s2? (1 point) 62 N ...
Thursday, March 13, 2014 at 4:45pm

Science check my answers
Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication process? denitrification*** nitrogen fixation producer uptake of nitrogen consumer decomposition Which of the following is carried out by denitrifying bacteria? break down large, nitrogen-...
Thursday, March 13, 2014 at 4:38pm

Science
Try b If the pressure is high enough, the ice can be pushed uphill or in any direction toward lower pressure. This is not common but happens.
Thursday, March 13, 2014 at 4:36pm

Science: my answers
Thank you!!!
Thursday, March 13, 2014 at 4:36pm

Science: my answers
yes
Thursday, March 13, 2014 at 4:33pm

math
Joe puts 5 books in his backpack as he leaves for school. He has 2 math books, 1 science book, and 2 history books. What is the probability that he will grab his science book out of his backpack without looking? I think 1/5 Jacquie has 4 sweaters that go with her new jeans. ...
Thursday, March 13, 2014 at 4:29pm

Science: my answers
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***
Thursday, March 13, 2014 at 4:14pm

science (check answer?)
Well i also learned this so i got the same question from my school and the answer was they are all metals. Its 100% right
Thursday, March 13, 2014 at 4:10pm

MATH
Joe puts 5 books in his backpack as he leaves for school. He has 2 math books, 1 science book, and 2 history books. What is the probability that he will grab his science book out of his backpack without looking? I think 1/5 Jacquie has 4 sweaters that go with her new jeans. ...
Thursday, March 13, 2014 at 4:09pm

Science
Hey, go Google Periodic table. Table was invented before protons and electron valence effects were known about. It is D historically.
Thursday, March 13, 2014 at 4:06pm

Science
Which best describes the similarities among elements included in the same column of the periodic table? A. They have the same state at room temperature. B. They have the same number of protons. C. They have the same number of electrons. D. They have similar chemical properties.
Thursday, March 13, 2014 at 4:02pm

Science
I never heard of a glacier flowing uphill :) They certainly do flow downhill to the ocean.
Thursday, March 13, 2014 at 3:42pm

Science
I answered this
Thursday, March 13, 2014 at 3:39pm

Science
The first one was wrong...
Thursday, March 13, 2014 at 3:32pm

Science
Thank you:)
Thursday, March 13, 2014 at 3:28pm

science motion short answer
omg, the question is so STUPID. IM DONE ok, is this better?: i live 25 meters from school. it takes me 3600 seconds to get there. but it takes longer in traffic, so then it takes.......... i dont even know, but is that better? (i doubt it) i dont even know wut im doing here, ...
Thursday, March 13, 2014 at 3:28pm

Science
Now wait a minute, where do you think icebergs come from (think Greenland or Alaska or Antarctica). I think c --------------------------------- agree on conservation plowing although I suppose you could also call it recycling. terracing is making various flat levels like ...
Thursday, March 13, 2014 at 3:28pm

Science
Which of the following statements about continental glacial movement is correct? A. continental glaciers can only flow uphill b. continental glaciers can flow in all directions c. continental glaciers can only flow downhill d. continental glaciers do not flow at all. *** A ...
Thursday, March 13, 2014 at 3:27pm

Science
Indicate your specific subject in the "School Subject" box, so those with expertise in the area will respond to the question. If you follow directions, you're much more likely to get help sooner.
Thursday, March 13, 2014 at 3:21pm

Science
What is the composition of the A horizon ? a. topsoil b. subsoil c. bedrock d. water Either b or d? ^^
Thursday, March 13, 2014 at 3:19pm

Science
idk
Thursday, March 13, 2014 at 3:19pm

Science
OOOhhh ok lol Ty yet again. :)
Thursday, March 13, 2014 at 3:19pm

Science
Ty :)
Thursday, March 13, 2014 at 3:19pm

Science
So yes, C
Thursday, March 13, 2014 at 3:18pm

Science
Force times distance in direction of force If not moving in cafeteria line - no work If moving forward in line and weight of tray is down, force not in direction of motion --> NO WORK
Thursday, March 13, 2014 at 3:18pm

Science
NO !! F = m A m is just a scalar Acceleration in the SAME direction as applied net force
Thursday, March 13, 2014 at 3:16pm

Science
Which of the following statements about continental glacial movement is correct? A. continental glaciers can only flow uphill b. continental glaciers can flow in all directions c. continental glaciers can only flow downhill d. continental glaciers do not flow at all. *** A ...
Thursday, March 13, 2014 at 3:15pm

science motion short answer
position for example would be meters in SI units, but could be inches or leagues or light years and you must specify units or be completely wrong. Actually in SI units your 1 hour to school was 3600 seconds. The point is that you must specify.
Thursday, March 13, 2014 at 3:15pm

Science
Which of the following is not an example of work? A. raising a barbell over your head B. picking up a box off the floor C. holding a tray in the cafeteria line D. pushing a box across the floor I think its C.
Thursday, March 13, 2014 at 3:12pm

History
Oh tytyty :) I posted a science question and what I got can you correct for me?
Thursday, March 13, 2014 at 3:10pm

Science
In what direction does an applied force move an object? It moves opposite right?
Thursday, March 13, 2014 at 3:10pm

science motion short answer
u said this in another persons post on the same answer: position in meters speed or velocity in meters/second acceleration in meters/second^2 wut do u mean?? anyway, something like this maybe?: I live 25 miles from school. It usually takes me 1 hour to get there. But it takes ...
Thursday, March 13, 2014 at 3:07pm

"anonymous"
I cannot reliably check these answers because I am not a science tutor, but you and TTR should take to heart everything that Damon wrote BECAUSE he is a science expert. You should complain to your school that you are getting a substandard education if all they are providing ...
Thursday, March 13, 2014 at 2:57pm

science motion short answer
I ran fifty (miles? degrees? millimeters?) I am sure you can come up with two more :)
Thursday, March 13, 2014 at 2:52pm

science motion short answer
9. Provide three statements that demonstrate the importance of units when describing motion. (3 points) i dunno wut they r askin... so..... if u can help, 3 sentences would be gr8 pls help asp thx
Thursday, March 13, 2014 at 2:41pm

science (check answer?)
I think Aluminum is all metal. My only question would be Germanium which is considered a "semi-metal being a semiconductor. However I really think they are all metals.
Thursday, March 13, 2014 at 2:31pm

science (check answer?)
What does aluminum, germanium, and polonium have in common? A. They are gases. B. They have properties of metals and nonmetals. C. They are all metals. D. They have the same properties as the noble gases in the last column. (I think its B.)
Thursday, March 13, 2014 at 2:21pm

science
thx it was right!:)
Thursday, March 13, 2014 at 1:56pm

Science... plz help~!(?)
https://www.google.com/search?client=saf​ari&rls=en&q=popul+Vuh&ie=UTF-8&oe=UTF-8​#q=popol+vuh+mayan&rls=en
Thursday, March 13, 2014 at 1:55pm

science
An example of a net force of zero could be a squeeze between your fingers. If you squeezed hard enough I suppose you could split the wood. However I would tend under reasonable conditions to agree with your answer. If it had said a rubber, I would have said you could stretch ...
Thursday, March 13, 2014 at 1:49pm

science
You can add the magnitudes of forces if they are in the same direction. However watch out. You can not just add them if they are not in exactly the same direction.
Thursday, March 13, 2014 at 1:40pm

science
i thought so... that was my guess if it was 10
Thursday, March 13, 2014 at 1:37pm

science
If you have two 5 Newton forces pushing a block to the right, that is a total of 10 Newtons pushing to the right. There may also be a moment due to the forces, but that is not part of the question.
Thursday, March 13, 2014 at 1:36pm

Science
And how can I measure temperature at different stages if I do this experiment?
Thursday, March 13, 2014 at 1:35pm

science
5. What is the net force acting on the object below? (1 point) its two 5N arrows pushing a block to the right, like this 5N -----> and the block is here 5N -----> and the block is here 0 N 5 N 10 N 25 N do u multiply, add or what???
Thursday, March 13, 2014 at 1:32pm

Science
What happens when yeast and hydrogen peroxide are mixed together? What happens when yeast, hydrogen peroxide, and dish soap are mixed together?
Thursday, March 13, 2014 at 1:31pm

science one question
The questions are overly simplistic. It is impossible to change velocity at constant speed without acceleration. Even if going around a circle at constant speed, you have centripetal acceleration. In other words if you change direction at constant speed you need acceleration ...
Thursday, March 13, 2014 at 1:07pm

science
3. A section of the Periodic Table of the Elements is shown. Based on the positions of the elements, the two elements that have the most similar chemical properties are — A. calcium and scandium B. calcium and titanium C. titanium and vanadium D. magnesium and calcium 4. ...
Thursday, March 13, 2014 at 12:56pm

Science
hint: both correct choices involve only water
Thursday, March 13, 2014 at 12:52pm

Science
1. Of the following, the only change that is an example of a chemical change is — A. water evaporating from a puddle B. an iron nail rusting and turning an orange color C. a piece of paper being cut into smaller pieces D. a stick being broken in half 2. All of the ...
Thursday, March 13, 2014 at 12:49pm

8th Grade Science (Periodic Table)
My answers: 1) A 2) B, C, D 3) C 4) B, D 5) A, D, E
Thursday, March 13, 2014 at 12:43pm

8th Grade Science (Periodic Table)
1. What conclusions can be drawn about the relationship between the arrangement of elements on the periodic table and the patterns observed in their properties? Properties of elements are related to atomic numbers. Properties of elements are related to ductility. Properties of...
Thursday, March 13, 2014 at 12:39pm

science one more question
4. A cat is walking down a sidewalk and spots a dog in a nearby yard. The cat starts to run in the opposite direction and then quickly climbs a tree. Which of the following changes most accurately describes the movement of the cat? (1 point) change in speed change in distance ...
Thursday, March 13, 2014 at 12:36pm

science one question
2.Which of the following would be affected if a soaring eagle changed direction but remained at a constant speed? acceleration only velocity only*** acceleration and velocity neither i dont think it would be acceleration since the eagle stayed at a constant speed... help asap??
Thursday, March 13, 2014 at 12:29pm

science one question?
You are welcome, hardly a challenge though. Inches are certainly not SI :)
Thursday, March 13, 2014 at 12:13pm

science one question?
Thank you soooo much Damon!!!:D it was correct!
Thursday, March 13, 2014 at 12:05pm

science one question?
SI: meter , kilogram , second so meter is distance unit in SI system We used to call it the MKS system.
Thursday, March 13, 2014 at 12:03pm

Physical Science
Visible light photons are not energetic enough to penetrate skin and flesh.
Thursday, March 13, 2014 at 12:01pm

science one question?
3. Which of the following is an example of a SI unit for distance? (1 point) mile meter second inch
Thursday, March 13, 2014 at 12:01pm

Physical Science
X-rays can take pictures of your bones but visible light cannot. Explain why. Homework question, please and thank you!
Thursday, March 13, 2014 at 11:52am

Plz help me.
Science, My answers 1. D 2. D 3.? 4. C
Thursday, March 13, 2014 at 11:34am

math/science
48 sec
Thursday, March 13, 2014 at 11:26am

Science? Social Studies? What?
??? And no indication about what YOU THINK all these answers are?
Thursday, March 13, 2014 at 11:22am

Science check my answers
Water
Thursday, March 13, 2014 at 11:13am

Science
These apply to any subject. http://drdavespsychologypage.homestead.c​om/Be_Here_Now_.pdf http://drdavespsychologypage.homestead.c​om/Learning_Requirements.pdf http://drdavespsychologypage.homestead.c​om/Learning_Hints.pdf
Thursday, March 13, 2014 at 10:10am

Science? Social Studies? What?
??
Thursday, March 13, 2014 at 10:05am

Science
If you wish to warm 100 kg of water by 20° C for your bath, show that 8370 kJ of heat is required.?
Thursday, March 13, 2014 at 6:39am

Science check my answers
Fresh water is scarce but we have oceans full of salt water. 2 is C I believe.
Thursday, March 13, 2014 at 5:32am

Science question, only 1
Only water not present in oceans is available for living things to use. Almost all of the water on earth is salt water in oceans.
Thursday, March 13, 2014 at 4:56am

Science check my answers
A
Thursday, March 13, 2014 at 1:52am

Science
How do you do science homework????????????????????????????????​????????????????????????????????????????​
Thursday, March 13, 2014 at 1:51am

Science question, only 1
Which of the following explains why water is a limited resource? Water is present on Earth in a fixed amount that does not change. Water is degrading slowly with time. Only water not present in oceans is available for living things to use. Once it ends up as groundwater, water...
Thursday, March 13, 2014 at 12:31am

Physical Science
30m
Wednesday, March 12, 2014 at 11:34pm

Science check my answers
1 is ok. I don't agree with 2.
Wednesday, March 12, 2014 at 10:52pm

Science check my answers
Which of the following is not needed to make a model of the water cycle? an energy source water a closed container a drain Which of the following explains why water is a limited resource? Water is present on Earth in a fixed amount that does not change. Water is degrading ...
Wednesday, March 12, 2014 at 10:44pm

Science 3
e
Wednesday, March 12, 2014 at 10:44pm

TO DrBob222 or any science helper
yes, citric acid.
Wednesday, March 12, 2014 at 10:39pm

TO DrBob222 or any science helper
So it must be C6H8O7, THANK U SOOO MUCH FOR UR HELP :):):):)
Wednesday, March 12, 2014 at 10:39pm

TO DrBob222 or any science helper
so it is C6H8O7?
Wednesday, March 12, 2014 at 10:35pm

TO DrBob222 or any science helper
hmmmm then what is the formula?
Wednesday, March 12, 2014 at 10:33pm

oops--TO DrBob222 or any science helper
I typed in C6H8O and not C6H8O7. So those three "possibilities" I gave you won't fit.
Wednesday, March 12, 2014 at 10:30pm

TO DrBob222 or any science helper
Doesn't it seem obvious it is an acid? Here is the formula. http://en.wikipedia.org/wiki/Citric_acid​
Wednesday, March 12, 2014 at 10:28pm

TO DrBob222 or any science helper
Here are three it could be. http://en.wikipedia.org/wiki/C6H6O
Wednesday, March 12, 2014 at 10:26pm

TO DrBob222 or any science helper
hmmm maybe my formula is wrong, can you answer this: what is the formula for citric acid? and is it a acid, base or salt?
Wednesday, March 12, 2014 at 10:25pm

TO DrBob222 or any science helper
I don't know what that is. It's just another empirical formula. CH3COOH I recognize as acetic acid but C2H4O2 (the empirical formula for aca\etic acid) is not recognizable. There are so many compounds it can be.
Wednesday, March 12, 2014 at 10:24pm

Science
LiOH + W = 231 grams 33.7 + W = 231 W = 197.3 Grams of water. Concentration = LiOH/(W+LiOH) = 33.7/231 = 0.146 = 14.6%
Wednesday, March 12, 2014 at 10:17pm

TO DrBob222 or any science helper
oops I spelt that one wrong its actually C6H8O7
Wednesday, March 12, 2014 at 10:13pm

TO DrBob222 or any science helper
HCH3COO is acetic acid--acid NaCL is sodium chloride--salt H2CO3 is carbonic acid --acid C6H8)7 I can't interpret Mg(OH) is magnesium hydroxide--base NaOH is sodium hydroxide--base KBr is potassium bromide--salt Sr(OH)2 is strontium hydroxide--base HNO3 is nitric acid--acid
Wednesday, March 12, 2014 at 10:11pm

TO DrBob222 or any science helper
identify the following formulas as acids, bases or salts: HCH3COO NaCL H2CO3 C6H8)7 Mg(OH) NaOH KBr Sr(OH)2 HNO3 please help really urgent :) thanks :)
Wednesday, March 12, 2014 at 9:58pm

POLITCAL SCIENCE
jkjknk
Wednesday, March 12, 2014 at 9:50pm

science
1. True 2. 100kg-m/s. 5. Momentum = 52kg * 10m/s. = 520 kg-m/s 61kg * 8m/s = 488 kg-m/s
Wednesday, March 12, 2014 at 9:39pm

Science quick help needed
identify the following formulas as acids, bases or salts: HCH3COO NaCL H2CO3 C6H8)7 Mg(OH) NaOH KBr Sr(OH)2 HNO3 please help :) thanks :)
Wednesday, March 12, 2014 at 9:38pm

science, pls explain this!
A chemical change has occurred The products are not water anymore but two different entities. If it were a physical change (ice (solid H2O) to liquid water to steam(water vapor) you have H2O in all three phase so the water has not been broken down to different substances as in...
Wednesday, March 12, 2014 at 9:29pm

science
A chemical bond was broken in separating H2O into hydrogen and Oxygen. New chemical bonds were made between the 2 hydrogen atoms and between the two Oxygen atoms.
Wednesday, March 12, 2014 at 9:22pm

physical science
its poop
Wednesday, March 12, 2014 at 9:14pm

science
ok, so i saw somebody already put this question here a few min ago but the answer wuz confusing... 25. When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of –183°C and the other has a ...
Wednesday, March 12, 2014 at 9:01pm

Science... plz help~!
The popul Vuh indicates that the mayans valued
Wednesday, March 12, 2014 at 8:58pm

science, pls explain this!
Hydrogen and oxygen 2 H2O ----- > 2 H2 + O2 in other word 4 H+ ions gain an electron and combine to make 2 neutral hydrogen molecules 2 O ions lose 2 electrons each to become a neutral O2 molecule
Wednesday, March 12, 2014 at 8:36pm

science, pls explain this!
25. When an electric current is passed through water during the process of electrolysis, two gases are formed. One gas has a boiling point of –183°C and the other has a boiling point of –253°C. Has a physical change or a chemical change occurred? Explain. (6 ...
Wednesday, March 12, 2014 at 8:28pm

please check(Social studies)
please check my answers thanks 1.B 2.C 3.B 4.B 5.C and D 1.How did the haitian revolution impact the history of the united states? A.It brought the united states into a war with spain over cuba. B.France no longer had haiti,so Napeleon was willing to sell louisiana. C.Slave ...
Wednesday, March 12, 2014 at 8:04pm

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