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April 18, 2014

Homework Help: Science

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Recent Science Questions

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Science
Which of the following describes how matter moves between producers, consumers, and decomposers in an ecosystem? one-way flow from producers to consumers to decomposers one-way flow from decomposers to consumers to producer cyclic flow froms producers to consumers to ...
Tuesday, February 11, 2014 at 12:43pm

Science
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you. As answered to your later post, we don't know about your house.
Tuesday, February 11, 2014 at 10:56am

Science
We have no knowledge about your house or the fungi in it.
Tuesday, February 11, 2014 at 10:54am

Science-2questions
Which of the following describes how matter moves between producers, consumers, and decomposers in an ecosystem? one-way flow from producers to consumers to decomposers one-way flow from decomposers to consumers to producer cyclic flow froms producers to consumers to ...
Tuesday, February 11, 2014 at 10:31am

science
-
Tuesday, February 11, 2014 at 9:50am

science
For each parking space, there are four possible parking place to be ocupied, except for the first and the last, which has just 2 places, and the second and the "before the last", which have 3 possibilities. So, we have a total P(n) of P(n)=(n-4)*4 + 12 = 4*(n-1) ...
Tuesday, February 11, 2014 at 7:54am

Science
so what do you think?
Tuesday, February 11, 2014 at 7:44am

Life science,Tourism, geography, and maths literacy
Wit these subs u cn b a nurse
Tuesday, February 11, 2014 at 1:36am

Science
Associate each item in the table with at least one field of science and one area of technology/engineering. Choose from the terms given at the bottom. Automobile aspirin shirt computer pesticide satellite robot atomic bomb vaccination can of soup polyester wrapper skyscraper ...
Tuesday, February 11, 2014 at 1:00am

science
r earth = 6,000 km d satellite from earth = 900. r satellite's orbit = 6900 km 2*pi*r = circumference = distance traveled around earth. distance/2 = speed satellite in km/hr d/hr x (1 hr/60 m) x (1 min/60 s) = ? km/s
Monday, February 10, 2014 at 9:34pm

science
What is the average speed of a satellite given the following information. 1) The earth's radius = 6000 km 2) The satellite is 900 km from the earth's surface 3) The satellite's orbital period: 2 hours 4) Circumference = 2pr (p = 3.14) A) 6 km/s B) 10 km/s C) 5 km/...
Monday, February 10, 2014 at 9:10pm

science
If it is still living, then it is still growning. Where would you get tissue which was produced eons ago? Only long dead things can be radioactive dated.
Monday, February 10, 2014 at 7:43pm

Science
Name 3 examples of fungus found in your house and where you found it or what you found it on.
Monday, February 10, 2014 at 6:09pm

science
Can scientists use radiocarbon dating to find the age of a very tall, old redwood tree living in an old growth forest? Explain your answer.
Monday, February 10, 2014 at 5:43pm

Science
Name 3 examples of fungus found in your house and where you found it or what you found it on.
Monday, February 10, 2014 at 5:24pm

science
You're welcome.
Monday, February 10, 2014 at 4:49pm

science
Yay thanks again
Monday, February 10, 2014 at 4:35pm

science
Right.
Monday, February 10, 2014 at 4:34pm

science
Water Cycle:Evaporation (cause by sun) (sun gives off heat in light in order for H20 to evaporte) Condensation (form of coulds) Precipation (coulds get to hevay and relase all its water;sleet rain hail snow...other..)runoff (water thats seeps into the ground)ground water (...
Monday, February 10, 2014 at 4:33pm

Life science, history, geography, and maths literacy
i want to become social worker
Monday, February 10, 2014 at 3:55pm

Science
thnx
Monday, February 10, 2014 at 3:32pm

Science
growing fruit, I suppose including apples
Monday, February 10, 2014 at 3:12pm

Science
Pomology is the science of what? 1. wrinkles 2. oil mixtures 3. bean development 4. growing apples
Monday, February 10, 2014 at 2:40pm

Science
Hey can you help me with those! :P
Monday, February 10, 2014 at 2:15pm

Math, science, trinogonomentry
How about you give us some angles that make sense in a triangle. The angles need to sum to 180. I realize that C is unknown, but geez, guy. What system are you using? Anyway, assuming you can actually devise some reasonable values, just use the law of sines: a/sinA = c/sinC c...
Monday, February 10, 2014 at 1:58pm

Science, plz,plz help
looks about right to me, but i am not 100% sure... (do u take from connexus?)
Monday, February 10, 2014 at 1:28pm

Math, science, trinogonomentry
1, solve triangle ABC which have angleA= 250.251 angleB=600.511 and a=3.82 find c
Monday, February 10, 2014 at 1:15pm

Math, science, trinogonomentry
1, solve triangle ABC which have angleA= 250.251 angleB=600.511 and a=3.82 find c
Monday, February 10, 2014 at 1:11pm

Science
Nigga do ur own work
Monday, February 10, 2014 at 11:54am

Science, plz,plz help
My answer: Light energy from sun->chemical energy in bonds of glucose.
Monday, February 10, 2014 at 11:49am

Science, plz,plz help
Which of the following illustrates the energy changes taking place during photosynthesis? light energy from sun ¨ chemical energy in bonds of glucose chemical energy in bonds of glucose ¨ light energy from sun light energy from sun ¨ chemical ...
Monday, February 10, 2014 at 11:46am

science
an influx of soil nutrients results in increased grass growth.
Monday, February 10, 2014 at 9:52am

Science
A force of 650N is acting upwards and a force of 850N is acting downwards along the same line,state the magnitude and direction of the resultant force and the equilibrant force
Monday, February 10, 2014 at 9:23am

science
the height of the person
Monday, February 10, 2014 at 5:03am

science
what is the minimum vertical length of a plane mirror needed for a person to be able to see a complete hesd to toe image?
Monday, February 10, 2014 at 4:05am

phyical science
A 250 g yo-yo is swung on the end of a 50 cm string at a constant speed of 4 m/s. The centripetal force acting on the yo-yo is
Sunday, February 9, 2014 at 8:51pm

Science
I suppose one should ask WHICH experiment by Lavoisier but I agree with your answer.
Sunday, February 9, 2014 at 7:12pm

Science
Yes.
Sunday, February 9, 2014 at 6:59pm

Science
what has a definite shape and volume a- solid b- liquid c- gas d- molecule My answer is A
Sunday, February 9, 2014 at 6:58pm

science
Which type of mechanical energy do the following contain? Kinetic Energy, Potential Energy, or Both A Car traveling at 100 mph along a flat road - KE A rubber band that has been stretched - PE A bowling ball rolling down a lane - both A piano lifted to a second story window - ...
Sunday, February 9, 2014 at 6:54pm

Science
What did Antoine Lavoisier’s experiments demonstrate? a- Atoms always split into pairs during a chemical change. b- Mass is neither lost nor gained during a chemical change. c- Matter can be created during a chemical change. d- Energy is neither lost nor gained during a ...
Sunday, February 9, 2014 at 6:47pm

Science
d is the only chemical reaction implied so I agree with you.
Sunday, February 9, 2014 at 6:32pm

Science
which is a chemical property of aluminum a- melting point is 660c b- boiling point is 2519c c- does not dissolve in water d- reacts with oxygen My answer is D
Sunday, February 9, 2014 at 6:23pm

physical science
Mass is the same no matter where. Weight is greatest on planet with largest G and smallest on planet with smallest G.
Sunday, February 9, 2014 at 6:23pm

Science
See your post above.
Sunday, February 9, 2014 at 6:18pm

Science
For NaOH, this is 100% dissociated; therefore, (OH^-) = (NaOH) OH^- = 2 M pOH = -log(OH^-) pH + pOH = pKw = 14. You know pOH, solve for pH. The H2SO4 isn't as simple as it lookis. If you are an advanced student, (0.39+x)/(0.39-x) = k2 for H2SO4. Solve for x and evaluate 0....
Sunday, February 9, 2014 at 6:18pm

Science
I agree.
Sunday, February 9, 2014 at 6:07pm

Science
what would happen to an object if the force of gravity on earth was decreased by half. a- its mass would decrease b- its weight would decrease c- its density would decrease d- its volume would decrease my answer is B
Sunday, February 9, 2014 at 6:04pm

Science
Calculate the PH of and POH of the following solution and comment on them.(a)0.39 moldm3 of H2SO4(b)2.0 moldm3 of NaoH
Sunday, February 9, 2014 at 5:49pm

Science
Calculate the PH of and POH of the following solution and comment on them.(a)0.39 moldm3 of H2SO4(b)2.0 moldm3 of NaoH
Sunday, February 9, 2014 at 5:48pm

physical science
A horizontal force of 100 N is required to push a box across the floor at a constant velocity. a) Show that the net force acting on the box is zero. b) Show that the friction force that acts on the box is 100 N.
Sunday, February 9, 2014 at 5:21pm

physical science
Consider a 100-kg box of tools in location: A: on Earth B: on the Moon C: on Jupiter. Rank from greatest to the least the a) masses of the 100 kg box of tools and b) the weights of the 100-kg box of tools.
Sunday, February 9, 2014 at 5:20pm

physical science
If you know that a 1-kg object weighs 10N, confirm that the acceleration of a 1-kg stone in free fall is 10 m/s2.
Sunday, February 9, 2014 at 5:16pm

science/physics
If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it swing back. The ...
Sunday, February 9, 2014 at 1:19pm

physics/science
If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it swing back. The ...
Sunday, February 9, 2014 at 10:41am

science
BC: d = rate x time 40,000 = 2500*t t = 8 hours for the first half. 40,000 = 1000*t t = 20 hours for the second half. Total time = 28 hours. There are ways to go here. The first is to see if half the time (14 hours) at the FC speeds will come up more or less than 40,000. d = ...
Saturday, February 8, 2014 at 9:07pm

science
A British Concorde (BC) and a French Concorde (FC) flew in opposite directions around the earth (40 000 km). The BC covered half of its flight distance at a supersonic speed of 2500 km/h and the other half at a subsonic speed of 1000 km/h. The FC spent half of its flight time ...
Saturday, February 8, 2014 at 7:13pm

Science
I agree.
Saturday, February 8, 2014 at 6:45pm

Science
Which of the following would result in the greatest reduction of waste sent to a landfill? a- composting food waste b- recycling glass, plastics, and metals c- reusing rubber, leather, and textiles from new products d- planting more trees in forests my answer is B
Saturday, February 8, 2014 at 6:37pm

Science
Yes. The issue here is pollution.
Saturday, February 8, 2014 at 6:24pm

Science
yeah
Saturday, February 8, 2014 at 6:19pm

Science
OK I 1st thought pollution but then I felt that the spills caused harm that impacted the biodiversity so is pollution correct?
Saturday, February 8, 2014 at 6:16pm

Science
Nope.
Saturday, February 8, 2014 at 6:14pm

Science
Oil spills and leaks in the Pacific Ocean have harmed marine organisims and the environment. Which kind of environmental issue is illustrated by this example? a- resource use b- pollution c- population growth d- biodiversity My answer is D
Saturday, February 8, 2014 at 6:10pm

Science
F.
Saturday, February 8, 2014 at 5:53pm

Computer Science
Write a program that allows the user to input a total dollar amount for an online shopping order and computes and outputs the shipping cost based on the following schedule: Order Total Ship within USA Ship to Canada Less than $50.00 $6.00 $8.00 $50.01–$100.00 $9.00 $12.00...
Saturday, February 8, 2014 at 5:27pm

Science
In a perfect world I suppose I agree with you. Although it isn't part of the problem, remember that preservation means from all influences, not just those by man.
Saturday, February 8, 2014 at 4:51pm

Science
Does the preservation of biodiversity prevent the extinction of species? My answer is yes
Saturday, February 8, 2014 at 4:30pm

Science
Right.
Saturday, February 8, 2014 at 4:29pm

Science
I agree.
Saturday, February 8, 2014 at 4:29pm

Science
Why is biodiversity ecologically valuable? a- it provides humans with food and shelter b- it is reliable source of revenue c- it establishes the foundation for food chains and food webs d- it provides raw materials fore clothing and medicine my answer is C
Saturday, February 8, 2014 at 4:16pm

Science
Why are rain forests the most diverse ecosystems? a- the are near bodies of water b- they have favorable climates c- they are surrounded by mountains d- they have more pollutants then other ecosystems my answer is B
Saturday, February 8, 2014 at 4:13pm

10th grade Science
Explain how a drug sits on acetylcholine receptors will affect muscle function? Is it because the drug would act as a blocking agent to prevent the receptors from gathering information on what to do?
Saturday, February 8, 2014 at 1:27pm

science (Partial)
2. gas, solid, liquid 3. It seeks the lowest level. 5. The water particles move so fast that they escape the liquid and become a gas. Foreign particles are deposited out.
Saturday, February 8, 2014 at 1:14pm

science --- pls check my work!!!
Liquids with high viscosity do not flow as well as liquids with low viscosity. honey - high viscosity water - low viscosity
Saturday, February 8, 2014 at 12:29pm

science --- pls check my work!!!
hi, pls check my work asap! 1. A ___ has a definite shape and a definite volume. (1 point) solid*** liquid gas molecule 2. Why is a gas able to flow? (1 point) Its particles have melted and can move around.Its particles have high viscosity and can move around. Its particles ...
Saturday, February 8, 2014 at 12:23pm

science
1. goes for a walk 2. doesn't go 3. remember his umbrella 4. forgets his umbrella So, 2nd.
Saturday, February 8, 2014 at 8:29am

science
1.What two things happen to particles in a substance when the substance is heated? 2. What are the three most common states of matter on Earth? 3. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? 4. A certain...
Saturday, February 8, 2014 at 2:00am

Science
Ratio = 200/20 = 10/1. 10 Loops on Primary and 1 loop on Secondary. p
Friday, February 7, 2014 at 9:21pm

Science
Oh okay, thank you. It doesn't really talk about this in my book.
Friday, February 7, 2014 at 7:31pm

Science
C. Nephron, villi, alveoli Capillaries in these structures allow the easy transfer of molecules to these tissues.
Friday, February 7, 2014 at 5:44pm

science
d = 0.5g*t^2 = 4.9*2^2 = 19.6 m.
Friday, February 7, 2014 at 3:33pm

Science
2 is right. For 1, use the same f = ma you did in #2.
Friday, February 7, 2014 at 2:23pm

Science
Help, I am not sure I am doing this right. Are these correct? 1. What is the acceleration of a 1,500-kg elevator with a net force of 10,500 N? 2. What net force is needed to accelerate a 60-kg cart at 12 m/s 2? I think it is 720N
Friday, February 7, 2014 at 2:18pm

probability science
7/8
Friday, February 7, 2014 at 1:21pm

physical science
I don't like it.
Friday, February 7, 2014 at 12:36pm

physical science
what do you think about the kind of charge on the plastic straw
Friday, February 7, 2014 at 12:17pm

science(please check answers)
im hoping this is right
Friday, February 7, 2014 at 12:12pm

science
I would say kinetic energy.
Friday, February 7, 2014 at 1:28am

science
I would say kinetic energy.
Friday, February 7, 2014 at 1:28am

Science
1 is C. 2 I don't know, 3 I don't understand the choices, 4 is A.
Thursday, February 6, 2014 at 10:53pm

Chemistry
It says 8. In a similar experiment Mary Moreorlesss was to determine the loss of weight when a crucible of potassium chlorate was heated to drive off the oxygen. After finishing the experiment she concluded the potassium chlorate contained 24.0% oxygen. Why did miraculous(...
Thursday, February 6, 2014 at 10:25pm

science
How can atoms of two elements that have a different number of protons have the same charge? A. by also having a different number of neutrons B. by also having a different number of electrons C. by having the same mass number D. by being the same size atoms
Thursday, February 6, 2014 at 9:10pm

science
If we drilled a hole straight through the earth, and dropped a golf ball down the hole, starting initially at rest, how fast would the ball be traveling when it reached the center of the earth. The earth’s radius is 6378 km.
Thursday, February 6, 2014 at 8:28pm

science
a b d c a b d c c a c a a
Thursday, February 6, 2014 at 8:06pm

Science
ATSETLECTOICNP
Thursday, February 6, 2014 at 7:51pm

Science
Which of the following are structures that rely on capillaries for exchange or movement of small molecules? A. Teeth, aorta, ureter. B. Cartilage, epidermis, larynx. C. Nephron, villi, alveoli. D. Leukocytes, atrium, bronchi. Can you check this please, it doesn't really ...
Thursday, February 6, 2014 at 7:40pm

Science
Alternating current going into a transformer has 200 volts. The current coming out has 20 volts. How many loops of wire might each coil have?
Thursday, February 6, 2014 at 7:38pm

reading
I tried searching this book to find out how Carson defended her view that scientists can rarely be writers. I found nothing. Sorry. However, there have been many scientists who have also been writers. Rachel Carson is one. Check this site for others. http://www.onlinecollege....
Thursday, February 6, 2014 at 7:28pm

Science
Which of the following sets of words can be used to describe the outputs of photosynthesis? water, glucose, light energy carbon dioxide, glucose, chemical energy oxygen, glucose, chemical energy glucose, oxygen, light energy Which of the following is true about producers? They...
Thursday, February 6, 2014 at 7:01pm

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