Thursday
November 27, 2014

Homework Help: Computers: Computer Science

Recent Homework Questions About Computer Science

Post a New Question | Current Questions

SCIENCE
We did a radioactive decay and half life lab with m&ms and I do not understand these conclusion questions: 1. how many half lives would it take for 500 nuclei to decay to 6.25% of the original number of nuclei? My ans: 3125?- do not think that's right! 2. Is there any way ...
Thursday, November 27, 2014 at 10:15pm

Science
What volume of 0.050M sodium hydroxide is needed to react with 25cm3 of 0.068M ethanoic acid?
Wednesday, November 26, 2014 at 2:21pm

environmental Science
the entire area of land that a river drains is called
Wednesday, November 26, 2014 at 12:16pm

Environmental Science
what did Thomas Malthus believe
Wednesday, November 26, 2014 at 12:12pm

Science Help Please
Which of the following is not among the advantagees of generrating nuclear energy? A.it does not release carbon dioxide into the atmosphere B. it does not require a specialized process or involve any risk C. it does not release chemicals that cause acid rain D. it releases ...
Tuesday, November 25, 2014 at 10:52pm

science
explain how mutations in dna affect the traits of an individual
Tuesday, November 25, 2014 at 9:23pm

SCIENCE BUT I REALLY NEED HELP
genes are specific sections of ___ To pass its traits on to the next generation, organisms must ____
Tuesday, November 25, 2014 at 7:44pm

Science
This will help explain another question I have. So,what is the pattern that occurs when magnetic waves are spread out through the visible spectrum?
Tuesday, November 25, 2014 at 7:17pm

Science 1 easy question!!!!
If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current___ My answer: Atomic model?
Tuesday, November 25, 2014 at 4:46pm

Science 1 easy question!!!!
One way the modern atomic model differs from Thomsons atomic model is that electrons are no longer scattered throughout an atoms positive matter like chocolate chips in cookie dough, instead each electron is outside of the nucleus occupying a specific ______. My answer: Orbital?
Tuesday, November 25, 2014 at 4:41pm

Science 1 easy question!!!!
Is K^+1 and F^-1 an ionic bond? My answer: yes
Tuesday, November 25, 2014 at 4:29pm

Science!
An index fossil must be? a) older than 1 billion years. b) smaller than other fossils around it. c)larger than other fossils around it. D) unique in its appearance. pleases help someone i don't really know but my best guess is a)
Tuesday, November 25, 2014 at 10:38am

science
what cause sea floor spreading
Monday, November 24, 2014 at 10:10pm

Science
2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each tube). The final ...
Monday, November 24, 2014 at 9:27pm

science
how many moles of oxygen gas are necessary to form 0.737 moles of carbon dioxide
Monday, November 24, 2014 at 5:56pm

int.science
The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False
Monday, November 24, 2014 at 10:52am

chem/science
A piece of an aluminum can was cut into small pieces. Then 0.422 g of the chips from the can was used to prepare potassium alum according to the procedure we used. Calculate the theoretical yield (in g) of potassium alum that could be obtained in the reaction. (Alum MW=474.41 ...
Monday, November 24, 2014 at 10:09am

Int.Science/laws of thermodynamics
Watch the heat engine animation in the lesson text above. Does this animation illustrate a "new and improved" heat engine? yes no
Monday, November 24, 2014 at 8:55am

Earth Science
Describe the difference in evolution between a supercell that develops in an environment with unidirectional wind shear and a supercell that develops in an environment with veering winds. What is causing this difference in evolution? THANKS!!
Monday, November 24, 2014 at 5:47am

science
An athlete executing a long jump leaves the ground at a 27.7∘ angle and travels 7.60m.If this speed were increased by just 5.0%, how much longer would the jump be?
Sunday, November 23, 2014 at 8:05pm

Science
Which of the following electromagnetic waves is not used for communication?
Sunday, November 23, 2014 at 4:05pm

science
just being curious, why does hurricane occur?? thanks
Sunday, November 23, 2014 at 1:57pm

chemistry
The National Institute of Science and Technology (NIST) kinetics database lists the rate constant, k, of a particular gaseous reaction as 8.56× 10–10 cm3·molecule–1·s –1 at 298 K. convert to units of M-1 s-1. convert rate constant to units of...
Sunday, November 23, 2014 at 12:43pm

Science PLEASE HELP
How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
Sunday, November 23, 2014 at 12:21pm

science
What r 4 alkali's that u would find in the house????? Luv Sara xxxx
Sunday, November 23, 2014 at 12:01pm

Science
How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
Sunday, November 23, 2014 at 11:09am

science
Rates of Reactions  I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips.  Variables:-  -Independent: the mass of marble chips  -Dependent: The volume of ...
Sunday, November 23, 2014 at 4:59am

Social Science
Where can I find information on the difference between English policing and American policing, without using wikipedeia? I found some information but is not showing a difference. Thank you
Saturday, November 22, 2014 at 9:42pm

Science
changes in the carbon cycle cause global temperatures to rise how might this affect the water cycle
Saturday, November 22, 2014 at 9:38pm

science
If there is a block of cheese with a volume of 1200 cm, and a mass of 2 kg (2000 g) what would be its mass-to-volume ratio be in g/cm3?
Saturday, November 22, 2014 at 9:12pm

science
which of the following is a characteristic of karst topography? a. caverns b. glaciers c. alluvial fans d. dunes
Saturday, November 22, 2014 at 7:30pm

computer science
What are the Control Identifiers, Domain, in the Layered Security Solution Report?
Saturday, November 22, 2014 at 7:03pm

Science
uncertainty for a tenth of a mm?
Saturday, November 22, 2014 at 12:27pm

Science
what is an uncertainty? From reading the internet, is it a way to express potential error and that the actual value is between +/-#? what would be the uncertainty for this: electronic balance measuring to the tenth of a gram? is it +/- 0.05?
Saturday, November 22, 2014 at 12:21pm

science
an object's resistance to change in motion is called is A. Density B. Inertia C. Mass D. Degrees
Friday, November 21, 2014 at 8:18pm

science
As an object get farther from earth is A. its weight increase B.it weight decrease C. it mass decrease D. it weight remains the same I am not sure but is it A(or b)
Friday, November 21, 2014 at 8:01pm

science
which of the following shows the path followed by nerve impulses in a reflex motor neurons,interneurons in brain,sensory neurons or sensory neurons,interneurons in brain, motor neurons
Friday, November 21, 2014 at 7:36pm

Science Help
Which of the following is not a goal of the clean water act? A. Controlling water pollution from point sources B. Encouraging voluntary cooperation by citizens related to nonpoint sources of pollution. C. Educating citizens about the importance of reducing pollution D. ...
Friday, November 21, 2014 at 7:11pm

science
4 answers energy flow in ecosystem?
Friday, November 21, 2014 at 7:04pm

Science Help
Which of the following statements describes the conservation od a natural resource? A. A factory burns coal to run its machines. B. A solar energy company harvests energy from sunlight. C. Lights in a house are turned off when not in use. D. A wind energy company covers a ...
Friday, November 21, 2014 at 6:46pm

Science Help
Renewable resources are considerered better for the enviorment because A. They are less expensive to harness. B. Once they are harnessed, they can be replaced. C. They do not cause any pollution. D. Using renewable resources encourages people to plant more trees. Is the answer...
Friday, November 21, 2014 at 6:36pm

Science Help
The process of desertification can occur when A. Plants usually found in the desert replace trees that have been cut down. B. Farmers use contour farming techniques. C. An area of forest is clear-cut. D. An area of forest is selectively cut. Is the answer C? Thank you
Friday, November 21, 2014 at 6:27pm

Science Help
Which of the following is not a nonrenewable resource? A. Oil B. Petroleum C. Corn D. Gasoline Is the answer A? Thank you
Friday, November 21, 2014 at 6:16pm

Science Help
Using coal for fuel releases pollution into the atmosphere. Why do people continue to use coal if it causes pollution? A. Using more coal reduces the amount of pollution from using oil. B. Using coal is realtivly inexpensive. C. Mining coal helps scientists unconver fossils. D...
Friday, November 21, 2014 at 6:13pm

Science Help
Selectively cutting down trees on an area of land can best be describes as A. Cutting down certain trees while leaving other trees standing. B. Cutting down all of the trees and smaller plants. C. Cutting down none of the trees on the land. D. Cutting down ass of the trees ...
Friday, November 21, 2014 at 6:04pm

Science- Skin
How thick is the epidermis as compared to the dermis as compared to the subcutaneous layer? Is there a comparison? If not, then how thick is the epidermis, dermis, and subcutaneous in thick skin?
Friday, November 21, 2014 at 6:02pm

science
A swimming pool measures 10m by 7m by 2m calculate the full force exerted by the water against the bottom. What is the pressure at the bottom due to the water?
Friday, November 21, 2014 at 5:15pm

Int.science
When a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy. True False
Friday, November 21, 2014 at 2:17pm

Int.science/Laws of Thermodynamics
The outward evidence for this transformation can be seen only in the mechanical motion of the motor. True False
Friday, November 21, 2014 at 10:53am

Int.science/Laws of Thermodynamics
The efficiency of the engines in the two previous problems are the same, comparing the input and output temperatures. True False
Friday, November 21, 2014 at 9:20am

Earth Science - NEED HELP QUICK
What is the thickness of the layer from 1000 - 850 mb if the mean temperature of the layer is 2 C? From what it says in my textbook it seems as if mb = hPa so all you do is 850 - 1000 = -150 hPa but I am pretty sure that is wrong because what do you do with the temperature?? ...
Friday, November 21, 2014 at 8:41am

Science
2 vectors have same magnitude.The magnitude of the resultant vectors is same as either of both vectors.What is the angle between 2 vectors?
Friday, November 21, 2014 at 7:37am

science
i have BaCl2.2H2O ,how can i get BaCl2.6H2O from it. or i have CuCl2.2H2O how can i get CuCl2.6H2O from it. actually i am working in the field of nanotechnology. trying to prepare nano-ferrites. now am trying to prepare copper doped barium hexaferrites.help me if u can
Friday, November 21, 2014 at 3:08am

Earth Science
Use angular momentum arguments to describe why a parcel of air moving from the equator towards the North Pole will be deflected to the east. It may be helpful to show equations in your response. THANKS
Thursday, November 20, 2014 at 8:44pm

Science
50 ml of ethyl alcohol amd 40ml of water combined in a beaker add up to 90ml of liquid why is this? (Particle theory)
Thursday, November 20, 2014 at 8:42pm

Science/Math Question
So in school, I am doing a " planet paper roll comparison " So the scale of the diameter of one planet is 0.943cm or something.. How do I measure it on paper?
Thursday, November 20, 2014 at 8:14pm

Science
What would happen if cells didn't have the following? : -Nucleus -Ribosomes -Endoplasmic Reticulum -Cell Wall
Thursday, November 20, 2014 at 6:45pm

science
Two train cars are connected to a locomotive as shown. Wach train has a force of kinetic friction equal to 50,000N. The locomotive pulls the two freight cars at a constant speed of 4.0m/s. Find the force of tension at each of the coupling points A & B.
Thursday, November 20, 2014 at 5:13pm

Earth Science
Use angular momentum arguments to describe why a parcel of air moving from the equator towards the North Pole will be deflected to the east. It may be helpful to show equations in your response.
Thursday, November 20, 2014 at 4:58pm

5th grade science
what does the statement "the properties of salts are different from the properties of the elements"mean.
Thursday, November 20, 2014 at 4:51pm

Science help URGENT
Muscles located in the walls of the small intestine help push digested material along. Muscles located in the walls of arteries help push blood along. Based on this information and your understanding of muscle types, which of the following statements is correct? Both sets of ...
Thursday, November 20, 2014 at 4:48pm

science
any science projects??? please help!!!
Thursday, November 20, 2014 at 3:47pm

int.science gtg in 8 min.
How much heat is contained in 100 kg of water at 60.0 °C? Be mindful of significant figure rules for both multiplication and addition. 30 kcal 2.10 x 104 kcal 2.40 x 104 kcal 2.77 x 104 kcal
Thursday, November 20, 2014 at 2:22pm

Int.Science
How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C? Be mindful of significant figure rules for both multiplication and addition. 450 kcal 430 kcal 280 kcal 130 kcal
Thursday, November 20, 2014 at 2:08pm

Science Help!!!!
One reason people around the world use coal as an energy source is A. It is nonrenewable B.it can be found many places C.it is a fossil fuel D. It cannot be used up Is the answer C?
Thursday, November 20, 2014 at 12:52pm

science
How do you peel a boiled egg with the shell sticking ?
Thursday, November 20, 2014 at 12:48pm

Earth Science
What two types of air masses collide to form a dry line? On which side of this boundary would you expect to see rising motion, and why?
Thursday, November 20, 2014 at 12:03pm

Science, just need answers checked PLEASE
3. Which of the following is NOT a factor that affects the rate of weathering in rocks? A. biological evolution B. climate C. rock characteristics D. amount of exposed surface area 6. In a well-developed soil profile, which horizon is the uppermost layer? A. the C horizon B. ...
Thursday, November 20, 2014 at 11:39am

Science
Someone please help me. :( Compare your models of the four haploid cells with those of other groups. Describe and explain any variation that you observe.
Thursday, November 20, 2014 at 10:28am

Science
What force do you need to push on a large crate to accelerate it at 1.8m/s2 across a rough floor? The crate has mass 32kg and the coefficient of kinetic friction between the crate and floor is 0.57
Thursday, November 20, 2014 at 10:05am

Science
1. A student lifts his 2.0-kg pet rock 2.8m straight up. He then lets it drop to the ground. Use the Law of Conservation of Energy to calculate how fast the rock will be moving ..... a. half way down b. just before it hits the ground 2. A 65-kg girl is running with a speed of ...
Wednesday, November 19, 2014 at 10:15pm

6 grade science
Which is not an example of stimulus A. the smell of baking bread B. the sound of your alarm clock in the morning C. the scream you give when someone scares you d.the light from the sun I think it is C. because the scream is the reaction to the stimuli, someone doing the ...
Wednesday, November 19, 2014 at 9:53pm

Science Technology
How was the camera developed ? ( Who made it )
Wednesday, November 19, 2014 at 8:27pm

science
What provides pure O2 for inhaling and canisters to collect CO2 CO2.
Wednesday, November 19, 2014 at 7:25pm

Science Technology
Originally the camera was made to capture a moment in time quickly and exactly. Paintings often reflected the opinion of the painter in their art, however, photos show exactly what was happening. Photos can be biased but nonetheless they are real. Photography started becoming ...
Wednesday, November 19, 2014 at 6:50pm

Science Technology
Can someone give me a brief explanation to why Cameras were developed ? Please make it short and simple.
Wednesday, November 19, 2014 at 6:35pm

earth science
The active sections that are located along fault lines are called
Wednesday, November 19, 2014 at 2:48pm

Science 7th Grade
Ms. Sue, I promise if you help me I will never ask for help on anything ever again. I just really need help. see im in connections academy but im moving to texas and texas has wierd laws so i have to go back to public school, and i really need to get my grades up i mean i have...
Wednesday, November 19, 2014 at 11:46am

science
Name the substance that makes bones flexible
Wednesday, November 19, 2014 at 11:46am

Science biodiversity(asap please!)
The panther(species Puma concolor coryi) lives in Florida. At present, there are fewer than 100 of these panthers living in the wild, and the species is considered endangered. A controversial breeding program has been set up that s moving females of a subspecies of panther, ...
Wednesday, November 19, 2014 at 11:38am

science
at 30 degree celsius , the solubility of ag2co3 (Ksp= 8 * 10^-12) would be maximum in 1 litre of ? a) pure water b) 0.05 M NH3
Wednesday, November 19, 2014 at 11:05am

Earth Science
List 3 distinguishing features found near a frontal boundary. Thanks
Wednesday, November 19, 2014 at 5:13am

science
Q: You find a clear substance that has a definite shape. What form of matter is the substance? A: Solid (Is this right)
Tuesday, November 18, 2014 at 10:09pm

english
need help on writing science fiction short story?
Tuesday, November 18, 2014 at 9:48pm

physical science
A 3Kg bar of aluminum has to be heated form 25 degreesC to 75 degreesC . how many calories are needed to achieve this temperature increase?
Tuesday, November 18, 2014 at 7:26pm

Science? Help
Summarize the steps of sexual reproduction and explain how it increases genetic diversity.
Tuesday, November 18, 2014 at 4:16pm

science
If the absolute temperature ooh 6 inches cubed of a gas decreases by a factor of 2, what will be the new volume? How do set up this problem and solve it?
Tuesday, November 18, 2014 at 3:33pm

Business MGT
9. Carlos wants to know the income potential for his computer consulting business during the next five years. Which of the following would be most helpful?________
Tuesday, November 18, 2014 at 2:58pm

science
if the pitcher moved his arm 1.1 m while accelerating the ball, how much work did the pitcher do on the bat
Tuesday, November 18, 2014 at 1:47pm

science
Earths atmosphere was created during Precambrian era
Tuesday, November 18, 2014 at 9:26am

Science
What are the implications of having aquitards in the water cycyle/
Tuesday, November 18, 2014 at 8:52am

computer science
The components of a traditional analysis model (data flow diagrams, process definitions, entity-relationship diagrams, and data definitions) were developed in the 1970s and 1980s as part of the traditional structured analysis methodology. How well do the components fit ...
Monday, November 17, 2014 at 10:40pm

science
Dan pushes a cart full of groceries with a force of 53N and does 1550J of work. How far did he push the cart?
Monday, November 17, 2014 at 9:51pm

Science 8
A copper bracelet is placed in a graduated cylinder full of water. The water level rises from 15.6 ml to 28.0ml. The mass of the bracelet is 101.7g. Is the bracelet made of pure copper? How would I know? How would I explain?
Monday, November 17, 2014 at 8:22pm

science
A 2000kg car traveling at a speed of 27m/s skids to a halt on wet concrete where μk = 0.20.
Monday, November 17, 2014 at 6:34pm

Science
If the meadow flower is killed by herbicide spraying, what changes might be expected in the other meadow species mentioned?
Monday, November 17, 2014 at 6:29pm

science
if you get cut a type of metal in two pieces do they both have the same density
Monday, November 17, 2014 at 6:06pm

Science
Although consumers play a very critical role in any ecosystem, a vital part of an ecosystem is the stability of its
Monday, November 17, 2014 at 6:04pm

Science
If you have 100g of vinegar and add 10g of baking soda, what should the total mass be?
Monday, November 17, 2014 at 4:07pm

Science
Which of the following displays the correct order of structures urine passes through as it is processed by the urinary system? nephron, ureter, urinary bladder, urethra ureter, urinary bladder, nephron, urethra urinary bladder, urethra, nephron, ureter urethra, nephron, ureter...
Monday, November 17, 2014 at 1:12pm

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