Friday
August 1, 2014

Homework Help: Computers: Computer Science

Recent Homework Questions About Computer Science

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agriculture,maths literacy,life science,geography
which career im going to enter in with?
Friday, August 1, 2014 at 4:30pm

math
Four students at a computer fair competed against each other in a space-travel game. Chris scored 2/3 as many points as the winner Pat. Rich scored 1/2 as many points as Chris. Tome scored 100 points, which was 90 points less than Rich's score. How many points did Pat score?
Friday, August 1, 2014 at 11:51am

science
Consider a rotating platform such as you used in lab. Imagine that it is initially rotating at some angular velocity. You drop a disk, that is not rotating, onto the top of the rotating platform so that it sticks to the rotating platform and begins rotating along with the ...
Friday, August 1, 2014 at 8:55am

science
a mixture of gases contains 64g of methane, 64g of oxygen and 64g of sulphur dioxide. The pressure of the mixture is 210 kpa. what is the partial pressure (in kpa) of the methane expected to be?
Thursday, July 31, 2014 at 11:29pm

science
forces of 20N to the south,40N to the northeast, and 10N to be east act on the object.the magnitude of resultant force is a)10N b)39 N c)20 N d)46 N
Thursday, July 31, 2014 at 11:09pm

science
The mass of an object is 217.5g and its volume is 192mL. What is the density of the object?
Thursday, July 31, 2014 at 10:33pm

life science
1.why are fossils important discoveries? 2. Why are fossils kept in a glass box in the museum? 3.What feature does australopithecus sediba share with humans? 4.What feature does australopithecus sediba share with apes? 5.Explain the scientific interpretation of the fossils ...
Thursday, July 31, 2014 at 3:53pm

Science/Physics
Andee has a mass of 68.5 kg on earth. What is his weight on Earth? What should his mass be in order to have the same weight at the surface of the moon?
Thursday, July 31, 2014 at 7:23am

science
The greenhouse effect is caused by the burning of fossil fuels and deforestation
Wednesday, July 30, 2014 at 7:16pm

Science
Adam suffers from severe emphysema. Gas exchange in his lungs is not adequate, and he requires supplemental oxygen. But even though his blood carbon dioxide levels are elevated, his blood pH is close to normal. Considering the urinary system, explain how this can occur.
Wednesday, July 30, 2014 at 6:33pm

Science
A researcher is studying the rate of chemical reactions within living blood cells. When placing the cells into a petri dish with a pH of 2.5, the researcher should predict that the rate of the reactions will A. increase immediately. B. decrease immediately. C. remain the same...
Wednesday, July 30, 2014 at 1:24pm

maths lit,life science,economics,history
what career must i follow
Tuesday, July 29, 2014 at 9:52am

science
two point charges of 5 micro culomb and 20 micro culomb are separated by a distance of 2m find the point on the line joining them at which electric field intensity is zero
Tuesday, July 29, 2014 at 3:18am

Science
In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant? A. 100% B. 75% c. 50% D. 25% B?
Monday, July 28, 2014 at 5:52pm

Science summer activity help
I saw a site that had fun summer activites and my mom said each one I pass I get 5 dollars so I want to check my answers. 1.B 3.D 4.A 5.D 1.how do scientists explain the great diversity of life on earth? different characteristics help __ A. young organisms find their parents B...
Monday, July 28, 2014 at 5:36pm

Science
. A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover ...
Monday, July 28, 2014 at 3:35pm

Science
While picking up passengers in a big city, a taxi driver drives 20.0 blocks south, then 15.0 blocks east, and then 6.0 more blocks south. What is the magnitude of the taxi’s resultant displacement? Iv'e been using the equation sqrt(x^2+y^2+z^2) THe answer I get is 25....
Monday, July 28, 2014 at 10:12am

Science
Can you give me a good topic for an investigatory proj. Like "The use of grape extract as an active component for removing ferrous oxide". The example is not from me, so I can't really use it. I need something posible that isn't proven yet.
Monday, July 28, 2014 at 8:41am

physical science
what is observed during an experiment of oxalic acid and sodium hydroxide
Monday, July 28, 2014 at 4:33am

science
In an experiment to determine the solubility of lead chloride (PbCl2), 5.6g of (NH4)2SO4 was added to a 250ml solution containing an unknown amount of dissolved lead chloride (PbCl2) resulting in the formation of Lead sulfate precipitate. The mass of the lead sulfate ...
Sunday, July 27, 2014 at 11:45pm

PHI 208 final exam
1. According to the video “Religion, War, and Violence,” Just War Theory asserts that military intervention 2. According to Glaucon, justice is based on 3. What is palliative care? 4. According to Tom Regan, what is fundamentally wrong with our current system 5. On ...
Sunday, July 27, 2014 at 9:03pm

Science
What do these symbols mean: 8=====> and ({!}) and ({8=!})?
Sunday, July 27, 2014 at 4:19pm

geography,maths lit,life science and agriculture
careers available in the following subjects please
Sunday, July 27, 2014 at 3:35pm

science
commercially available concentrated H CL contains 38% H CL by mass (a) what is the molarity of this solution if the density in 1.19gm/l (b) what volume of concentrated HCL is required to make 1l of 0.1M HCL?
Sunday, July 27, 2014 at 10:21am

science
When the front of a 5.0 m long bus traveling at a constant speed of 20 m/s is 55 m away from an intersection, the traffic light turns yellow. It will take 3.0 s before the traffic light turns red. The driver’s reaction time is 0.25 s. The bus can accelerate up to 2.0 m/s2...
Sunday, July 27, 2014 at 4:05am

science
Why do sulphur and iron form a compound on heating?
Sunday, July 27, 2014 at 3:40am

Life Science
Less-economically developed countries will experience higher birth rates than more-economically developed countries due to A. decreased availability of sanitary water. B. higher infant mortality rate. C. higher literacy rate of women. D. increased availability of contraceptives.
Saturday, July 26, 2014 at 3:25pm

earth science
Which of the following is not an example of a mineral crystal shape? A. Pyrite B. Kryptonite C. Quartz D. Calcite i think its A am i right
Saturday, July 26, 2014 at 3:14pm

College English
John Winthrop “A Model of Christian Charity" Discuss the manner in which the theories expressed by Winthrop are in some degree evident in American government and culture today. CAN SOMEONE TELL ME IF I ANSWER IT RIGHT? In Prospero's America, Walter W. Woodward ...
Saturday, July 26, 2014 at 12:45pm

SCIENCE
A conductor of length 0.5m moves in a uniform magnetic field of flux density 2 wbm. at a uniform velocity of 40m/s. Calculate the induced EMF under the following conditions: (1) the conductor moves at right angle to the magnetic field (2) the conductor moves at an angle of 30 ...
Saturday, July 26, 2014 at 6:12am

science
Use standard enthalpies of formation to calculate the value of delata H degree for the rxn:NH3(g) + 3F2(g) = NF3(g) + HF(g)
Saturday, July 26, 2014 at 3:11am

college English
Discuss the manner in which the theories expressed by John Winthrop are in some degree evident in American government and culture today. Can someone tell if my answer is right. In Prospero's America, Walter W. Woodward looks at the exchange of catalytic society to America ...
Friday, July 25, 2014 at 8:42pm

English
Discuss the manner in which the theories expressed by John Winthrop are in some degree evident in American government and culture today. Can someone tell if my answer is right. In Prospero's America, Walter W. Woodward looks at the exchange of catalytic society to America ...
Friday, July 25, 2014 at 7:31pm

science
if the wings of bird are clipped will they able to fly
Friday, July 25, 2014 at 2:14pm

Social Science - Science
Post a behavioral research situation that could use a Pearson coefficient and chi square research study. Present the rational for each selection.
Friday, July 25, 2014 at 11:22am

physics
can we make any science model on application of ultrasound
Friday, July 25, 2014 at 7:59am

Science
What volume of 0.250 mol/L hydrochloric acid is nuetralized by 1.50g of calcium hydroxide?
Friday, July 25, 2014 at 3:25am

science
You know that a collision must be "elastic" if: The momentum of the two-object system doesn't change The sum of the final kinetic energies equals the sum of the initial kinetic energies There is no change in the internal energies of the objects (thermal energy, ...
Thursday, July 24, 2014 at 5:50pm

Science/Biology/Physics
Which of the following represents Boyle's gas law? A. Gas turns to a liquid when temperature reaches 0° C (32° F). B. As the volume of a gas increases, the temperature also increases. C. At any temperature, inert gases are less combustible than non-inert gases. D. ...
Thursday, July 24, 2014 at 10:49am

Science
how to reduce the resistive force while freewheeling?
Thursday, July 24, 2014 at 8:51am

science
does kidney transplant always succesful
Thursday, July 24, 2014 at 5:53am

SCience
The purpose of surfactant in the lungs is to A. facilitate lung expansion. B. bind oxygen from the air. C. improve lung blood flow. D. remove pollutants in the air. I believe it's A
Wednesday, July 23, 2014 at 9:26pm

Biology/Science
Which of the following processes produces haploid gametes? A. Meiosis B. Fertilization C. Mitosis D. In!@#$%^&tion I think A
Wednesday, July 23, 2014 at 9:23pm

Science/Biology/Physics
1. Giraffes have long necks that allow them to reach more food sources in their habitat. The long neck trait is an example of A. selection. B. adaptation. C. radiation. D. homology. 2. Which of the following is the most common kind of chemical bond in biological molecules? A. ...
Wednesday, July 23, 2014 at 6:54pm

science
A mass m=5.2 kg is attached to the end of a spring with a spring constant of k=15.6 N/m. The mass moves through a viscous damping medium with a damping constant b=1.8 kg/s giving a velocity dependent damping force Fdamp= -bv. The motion occurs in zero gravity so set the force ...
Wednesday, July 23, 2014 at 3:32pm

Science
What should be the focal length of a double concave length 60 that an object placed 25 cm from it will produce 3/4 times large as the object?
Wednesday, July 23, 2014 at 9:51am

science
three point charges are located on the positive y-axis of a coordinate system.charge q1 = -2.09 nC is 2.05 m from the origin and charge q2 = +2.70 nC is 3.25 m from the origin, and the third charge q3 = -2.56 nC is located 5.03 m on the positive y-axis.the fourth charge q4 = -...
Wednesday, July 23, 2014 at 9:27am

science
how much heat will be carried by 4 gm aluminium at 40 C temperature?
Wednesday, July 23, 2014 at 12:36am

science, physics
A 4 μC point charge is on the x-axis at 1.1 m, and a 3 μC point charge is on the x-axis at 2.7m. Find the magnitude of the net electric field at the point on the y-axis where y = 3.7 m . The value of the Coulomb constant is 8.98755 × 109 N · m2/C2. ...
Tuesday, July 22, 2014 at 7:09pm

Math
#1 Mr. Jones got a loan for a sum of money, and at the time of repayment he owed $75 in interest. Mr. Brown borrowed three times the amount of money Mr. Jones had borrowed at the same rate of interest for twice as long a time. How much interest does Mr. Brown pay? #2 Mr. Baker...
Monday, July 21, 2014 at 10:46pm

science
A hoop of mass M = 4 kg and radius R = 0.4 m rolls without slipping down a hill, as shown in the figure. The lack of slipping means that when the center of mass of the hoop has speed v, the tangential speed of the hoop relative to the center of mass is also equal to vCM, since...
Monday, July 21, 2014 at 2:06pm

science
1o grams of caster sugar dissolved in 25 degrees long to does it take.
Sunday, July 20, 2014 at 11:36pm

Maths lit,tourism.agricultural , life science
Which career do i qualify to study with these subjects at TUT or collega
Sunday, July 20, 2014 at 5:12pm

science
A hoop of mass M = 4 kg and radius R = 0.4 m rolls without slipping down a hill, as shown in the figure. The lack of slipping means that when the center of mass of the hoop has speed v, the tangential speed of the hoop relative to the center of mass is also equal to vCM, since...
Sunday, July 20, 2014 at 2:35pm

business math
The Consumer Electronics show reports that the HP Spectre laptop computer starts at $99.70 for a base configuration. The model displayed at its recent show costs $1,361, $124 more than the comparable 13-inch Apple MacBook Air. If Computers-R-Us buys the HP Spectre at the show ...
Sunday, July 20, 2014 at 1:27pm

science
does density affect weight?
Saturday, July 19, 2014 at 1:20pm

math
Last month, Nate spent 12% of his paycheck on car repairs and 25% of the remainder on food. He gave $1,320 of the remaining money to his parents and then bought a computer on sale. If the usual price of the computer was $825 and the discount was 20%, how much money did Nate ...
Friday, July 18, 2014 at 1:16pm

math
Last month, Nate spent 12% of his paycheck on car repairs and 25% of the remainder on food. He gave $1,320 of the remaining money to his parents and then bought a computer on sale. If the usual price of the computer was $825 and the discount was 20%, how much money did Nate ...
Friday, July 18, 2014 at 12:19pm

maths lit, geography, life science, history, life orientation, english, tswana
what can I do with my life with all this subjects that I studied?.
Friday, July 18, 2014 at 10:39am

Science
A ray of light approaches a jar of honey at an angle of 30.0 degrees. If the angle of refraction is 19.5 degrees, what is the refractive index of honey?
Thursday, July 17, 2014 at 11:15pm

Science
What is the index of refraction of a material if the angle of incidence in air is 50 degrees and the angle of refraction in the material is 40 degrees? Please show steps.
Thursday, July 17, 2014 at 8:35pm

Science
. A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover ...
Thursday, July 17, 2014 at 7:02pm

Science
Fitness is a result of which of the following factors? A. Overproduction B. Adaptation C. Variability D. Homology I think it is B
Thursday, July 17, 2014 at 6:57pm

Science
What is one qualitative factor and one quantitative factor that affect the refraction of light as it passes from one medium to another?
Thursday, July 17, 2014 at 4:50pm

science
A runner whose mass is 49 kg accelerates from a stop to a speed of 6 m/s in 3 seconds. (A good sprinter can run 100 meters in about 10 seconds, with an average speed of 10 m/s.) (a) What is the average horizontal component of the force that the ground exerts on the runner'...
Thursday, July 17, 2014 at 4:40pm

Science
What are the affects when posting warning signs where there is a history of wildlife collisions. Please explain using jot dots please .
Thursday, July 17, 2014 at 1:57pm

Science
You are a scientist hired by the ministry to investigate its anti-collision strategies. Choose one of the five strategies above. Outline a procedure to test how well the strategy works. I've chosen adding highway lighting to improve night visibility. But how do I start it ...
Thursday, July 17, 2014 at 11:42am

Science
Which of the government strategies for reducing collisions listed below might be the most effective? Explain your answer. a. Installing fencing along major highways b. Draining salty ponds near highways c. Posting warning signs d. Adding highway lighting to improve night ...
Thursday, July 17, 2014 at 11:07am

science
How does coronary artery disease affect normal homeostasis of the cardiovascular system
Thursday, July 17, 2014 at 9:00am

Science
a jogger with a mass of 60.0kg is moving at a speed of 3.0m/s. what is the jogger's kinetic energy? KE=270 joules Can you show me the steps to this answer please.
Wednesday, July 16, 2014 at 10:36pm

science
At a murder scene, you have started making an image of a computer’s drive. You’re in the back bedroom of the house, and a small fire has started in the kitchen. If the fire can’t be extinguished, you have only a few minutes to acquire data from a 10 GB hard disk...
Wednesday, July 16, 2014 at 3:19pm

science
A horizontal spring-mass system has low friction, spring stiffness 210 N/m, and mass 0.6 kg. The system is released with an initial compression of the spring of 11 cm and an initial speed of the mass of 3 m/s. suppose that there is energy dissipation of 0.02 J per cycle of the...
Wednesday, July 16, 2014 at 2:57pm

science
The cider is heated from an initial temperature of 4°C to a final temperature of 65°C. The steam enters the heat exchanger as 50% quality steam and exits as water condensate at 85°C. Calculate the mass of steam required to heat 150 kg of cider. (For the cider, ...
Wednesday, July 16, 2014 at 10:24am

Science
Fitness is a result of which of the following factors? A. Overproduction B. Adaptation C. Variability D. Homology I think it is B. not sure
Tuesday, July 15, 2014 at 7:25pm

Science
A researcher collects high-resolution photographs of the Earth taken from outer space at annual intervals for the last decade. This data would be most useful to analyze which of the following? A. Human movement during crises B. Migration patterns of large whales C. ...
Tuesday, July 15, 2014 at 6:58pm

Science
Experiments cannot validate hypotheses, only falsify them. The statement above can be restated in which of the following ways? A. Until disproved, an explanation for an observation is valid. B. Certain concepts cannot be subjected to direct experimentation. C. A hypothesis ...
Tuesday, July 15, 2014 at 6:58pm

science
Calculate the volume of a graduated cyclinder that has a radius of 10 mm and a height of 120 mm.
Tuesday, July 15, 2014 at 11:53am

science
why should you not attempt to take a picture of fluorine?
Monday, July 14, 2014 at 9:23pm

science
homogenized milk is composed of microscopic globules of fat suspended in a watery medium. is homogenized milk a true solution?
Monday, July 14, 2014 at 9:21pm

science
element 118 was reportedly synthesized in 1999, but the claim was later retracted. as a consequence of that experiment, element 116 was discovered. to what period and group would each of these two elements belong, and what known elements should each resemble?
Monday, July 14, 2014 at 9:20pm

Science
A test is performed to see if applying fertilizer to rose bushes increases the number of flowers on bushes. Which of the following best relates to the hypothesis for this experiment? A. Watering all of the rose bushes the same amount throughout the experiment B. Predicting ...
Monday, July 14, 2014 at 8:03pm

science
Determine the percent composition of sodium hydrogen carbonate. Na H C O3 1*22.999 1*1.008 1*12.011 3*15.999 22.999 1.008 12.011 47.997 /84.015 /84.015 /84.015 /84.015 .2737 .0120 .1430 .5713 *100 *100 *100 *100 27.37% 1.2% 14.3% 57.13% did i do this correctly?
Monday, July 14, 2014 at 8:01pm

science
what is the correct number of protons, neutrons and electrons in a neutral Cadmium-112 atom?
Monday, July 14, 2014 at 7:57pm

science
Name the ionic compound form when a Magnesium reacts with chlorine?
Monday, July 14, 2014 at 6:18pm

Science
A student is assigned the task of measuring the mass of one tennis ball using a scale for which the zero adjustment on the balance is not working. The student is given three balls and the can in which they were packaged. Which of the following strategies will provide the best ...
Monday, July 14, 2014 at 5:31pm

Pre algebra
Will has a mean score of 62 on the first five test in science. if he gets a 50 on the next test what will his mean be then?
Monday, July 14, 2014 at 1:51pm

Science
There are two set pieces in a theater sitting on platforms with wheels. One is a tree with a mass of 50 kg. It is moving at 3 m/s. The other is a fence with a mass of 30 kg. If the two set pieces have equal momentum, how fast is the fence moving? A. 3 m/s B. 5 m/s C. 30 m/s D...
Monday, July 14, 2014 at 9:24am

science
the potential energy of an electron in H-atom is -13.6eV.if the potential energy of an electron in He+ ion is -3.4eV ,what would be the excited state of He+?
Monday, July 14, 2014 at 4:18am

science
Unit 33 discusses a natural way to reinforce science process skills and introduces the scientific method. This strategy, especially appropriate for primary grades, is to have children do which one of the following?
Sunday, July 13, 2014 at 6:12pm

Science
Two students collect information about the number of dandelions in a park. Based on their sampling, they estimate that there are 900 dandelions in the 300-square-meter city park. To determine the accuracy of their estimate, which of the following questions is necessary? A. ...
Sunday, July 13, 2014 at 1:27pm

Science
. A population shows the following annual data: 3% emigration 2% immigration 2% births 1% deaths Which of the following is the change in population at the end of the year? A. 3% decrease B. 2% increase C. 1% decrease D. No change I think it is not change.
Sunday, July 13, 2014 at 12:27pm

Science
An experienced mountaineer decides to climb Mount Everest using the same route in the same season and with similar materials and equipment used by a fatal1924 expedition. The scientific purpose of such a climb would be to A. show that modern technology makes climbing safer. B...
Sunday, July 13, 2014 at 11:41am

Science
In developing countries, which of the following factors correlates with high birth rates? A. Increased availability of contraception B. Increased education and standard of living C. High infant mortality rate D. High availability of postnatal care
Sunday, July 13, 2014 at 11:40am

Science
. A study demonstrates that treatment of peptic ulcers with antibiotics results in improvement in a large number of patients. This implies that A. antibiotics neutralize stomach acid. B. these ulcers are caused by a bacterial infection. C. pressure ulcers can be treated in the...
Sunday, July 13, 2014 at 11:39am

Science
A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover plants...
Sunday, July 13, 2014 at 11:37am

Science
Which of the following procedures is an appropriate negative control for testing the hypothesis that air contains bread mold spores? A. Seal slices of bread in a container to minimize air contact. B. Place slices of bread in a refrigerated environment. C. Add ingredients to ...
Sunday, July 13, 2014 at 11:36am

Science
A cylinder and an airtight piston are used in the following experiment. The piston is pushed up and down in the cylinder and the resulting pressure of the air inside the cylinder is measured with a pressure gauge. The results of the experiment are recorded in the following ...
Sunday, July 13, 2014 at 11:32am

science
Plane sound wave of frequency 500 Hz fall normally on a smooth wall.At what distance from the wall will the air particles have maximum and minimum amplitude of vibration and the velocity of sound in air may be taken as 340 meter per second.
Sunday, July 13, 2014 at 8:07am

science
how would you go about locating the magnetic north pole assuming it were still on land?
Saturday, July 12, 2014 at 3:23pm

science
what happens when you cut a bar magnet in half? if it were continually cut in half, then would it finally yield two magnetic monopoles?
Saturday, July 12, 2014 at 3:22pm

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