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April 20, 2014

Homework Help: Computers: Computer Science

Recent Homework Questions About Computer Science

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science
A Boy of mass 25 kg climbs atop a playground slide of height h= 3 m. When the boy slides down the inclined board, the work done to overcome friction is 550 Joule. What is the boy’s speed before he touches the ground.
Sunday, February 16, 2014 at 11:59pm

Physical Science
can I get some help with these questions. im not sure on these ones During the stage of internal combustion engine operation in which the piston rises and compresses the fuel in the combustion chamber, a. both the intake and exhaust valves are open b. the intake valve is open ...
Sunday, February 16, 2014 at 11:00pm

Science
When you have H2 gas in a tube and you test it, you usually ignite the H2 gas with a flame. The reaction is 2H2 + O2 ==> 2H2O. I expect that you SEE no H2O because the combustion gives a gas (steam) and you don't see that. But it's there. Perhaps if you cooled the ...
Sunday, February 16, 2014 at 10:27pm

physical science
Wt. = 80kg * 1.625N/kg = 130.7 N. g on moon = 1.625 m/s^2.
Sunday, February 16, 2014 at 9:55pm

math
The telephone company has 25 computer controlled switching systems. Each system handles 700,000 calls an hour. The system works at 96% accuracy. How many calls would not accurately
Sunday, February 16, 2014 at 9:31pm

GEN 499 General Education
These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 2/16/2014 Time Spent: 27 min , 35 secs Points Received: 24 / 25 (96%) Question Type: # Of ...
Sunday, February 16, 2014 at 9:29pm

science
Wrong... MA of inclined plane = 20m/1.2m = 16.67 &the rest idk.
Sunday, February 16, 2014 at 9:26pm

Science
I think the last question means if we test hydrogen in a tube, y is there no water in it? I don't know wut the question means either and thank u for ur help:)
Sunday, February 16, 2014 at 8:40pm

science
sin A = 1.2m/20m = 0.06 A = 3.44o Fap-Fp = m*a = m*0 = 0 300 - Fp = 0 Fp = 300 N = Force parallel to the ramp. Fp = mg*sin A = 300 N. m * 9.8*sin3.44 = 300 0.588m = 300 m = 510.2 kg. = Combined mass.
Sunday, February 16, 2014 at 8:38pm

Science
Yes, elements can be separated from compounds. It takes a reaction of some kind; i.e., they can not be separated by physical means. The gas, H2, is lighter than air; therefore, holding the tube upright with no stopper and the gas will float out. Holding the tube upside down, ...
Sunday, February 16, 2014 at 8:35pm

Science
Can an element be separated from a compound? Can an element form a compound? The reaction of zinc metal and hydrochloric acid creates hydrogen gas, an element. if we create this element in a tube what property of this element requires us to keep the tube upside down? Water has...
Sunday, February 16, 2014 at 7:19pm

Grammar Answer Check
Identify the underlinded conjunctions in the following excerpts from "The Interlp[ers" as "coordinating," "correlative," or "subordinating." 1. ..a man stood one winter night watching _and_ listening, _as though_ he waited for some beast...
Sunday, February 16, 2014 at 7:16pm

science - Damon?
Yeah, you may be right. It could be that the hydraulics involve prove that the weight of air in the beaker remains constant regardless of how much is displaced, but I'd have to research it. I guess you can do that on your own, or hope Damon or someone will stop by with ...
Sunday, February 16, 2014 at 5:48pm

science
I don't think it is correct but i am myself not sure what is the right answer.
Sunday, February 16, 2014 at 5:09pm

science
DrBob has confidence that the students who use this board are intelligent and capable of finding the answers with a little help. Giving students straight-out answers does not help them learn.
Sunday, February 16, 2014 at 4:38pm

science
since you displace some of the air in the beaker, its side of the lever should rise.
Sunday, February 16, 2014 at 4:32pm

science
I just felt like posting to say that DrBob is one of the least useful answerers on this site...he never actually gives the answer
Sunday, February 16, 2014 at 4:23pm

science
A lever scale is balanced with a beaker filled of air on one side. The scale is very sensitive and can easily measure a change in weight of about 1/2 mg. What happens If you put your finger carefully into the beaker without touching the glass?
Sunday, February 16, 2014 at 3:46pm

science
density = mass/volume Just make up some numbers and see. For example suppose A = 20g and B = 10 g for mass. Then they both have the same volume of 5 cc. Substitute those numbers and see which has the higher density.
Sunday, February 16, 2014 at 3:41pm

science
if you have two samples of the same volume. the mass of sample A is higher than that of sample B. which sample has the greatest density?
Sunday, February 16, 2014 at 3:08pm

physical science
F = m g = G M m/R^2 10 * R ---> 1/100 90 * m ----> 90 9.81 * 90/100 = 8.83 m/s^2
Sunday, February 16, 2014 at 2:39pm

Science
These questions refer to tides. 1. Why are vertical clearances of bridges along navigable waterways given as heights in feet above mean(average) water height? 2. Why would knowledge of tides be of any importance in a military landing action?
Sunday, February 16, 2014 at 2:23pm

physical science
the diameter of the planet saturn is 10 times that of the earth but the mass of the planet is only 90 times greater than that of the earth.what is the gravitational acceleration or number gs you will feel on saturn?(8.8m.s-2)
Sunday, February 16, 2014 at 12:27pm

physical science
calculate the weight of a man with a mass of 80.0kg on the surface of the moon 156N?
Sunday, February 16, 2014 at 12:18pm

Science
Classify reaction as addition, displacement, or decomposition: Al(s)+NaOH(aq)=Al(OH)3(s)+Na+(aq)
Sunday, February 16, 2014 at 11:46am

Physical science
Well, 0 Newtons gives 0 frictional force
Sunday, February 16, 2014 at 11:27am

Physical science
A box a weight of 100 N rests on a horizontal floor.The coefficient of static friction is 0,40 and the coefficient of kinetic friction is 0,30.DETERMISE THE FRICTIONAL FORCE ACTING ON THE BOX IF A HORIZONTAL FORCE IS APPLIED WITH A MAGNITUDE OF 0 N
Sunday, February 16, 2014 at 10:53am

science
A ramp 20m long slopes down 1.2m to the edge of a lake. A force of 300N is needed to pull a boat on a trailer at constant speed up the ramp when they are clear of the water. If friction is negligible, what is the combined mass of the boat and trailer. Hints: Calculate MA of ...
Sunday, February 16, 2014 at 10:04am

Science
HIV is a retrovirus. Which of the following processes does it use to synthesize a DNA strand using its own RNA genome as a template? *reverse translation *reverse transcription-------- *translation *transcription
Sunday, February 16, 2014 at 9:17am

Science
These questions refer to tides. 1. Why are vertical clearances of bridges along navigable waterways given as heights in feet above mean(average) water height? 2. Why would knowledge of tides be of any importance in a military landing action?
Saturday, February 15, 2014 at 11:33pm

BIO. LIFE SCIENCE
The genotypes of the parents must be Pp and pp, such that half the progeny have the dominant allele (P_) and half have the recessive phenotype (pp).
Saturday, February 15, 2014 at 3:41pm

8th grade science
Can someone please help me. I've been looking online on the internet but I still cant find the answers and I have read the whole chapter in my book based on what we are learning and I cannot find any useful information that will help me answer this question. So Please help...
Saturday, February 15, 2014 at 3:24pm

8th grade science
Explain how the sun's temperature will change over time as it ages.
Saturday, February 15, 2014 at 3:17pm

Life science, physical science, business studies, pure maths
i am doing these subject at school, wat can i become!
Saturday, February 15, 2014 at 10:17am

physical science
Vi up = 10 sin 60 = 8.66 m/s if ax is horizontal acceleration, there is none. Horizontal component of velocity is constant
Saturday, February 15, 2014 at 10:16am

science
Hello Damon i have asked my teacher and he said that the air part is not what you said. He gave me one more chance to tell him what is the right answer.
Saturday, February 15, 2014 at 10:15am

physical science
been there, scroll down
Saturday, February 15, 2014 at 10:14am

physical science
Vi up = 10 sin 60 = 8.66 m/s if ax is horizontal acceleration, there is none. Horizontal component of velocity is constant
Saturday, February 15, 2014 at 10:14am

physical science
A frog jumps at the angle of 60 degrees to horizontal with initial velocity of 10.0m/s 1. calculate velocity Voy of the frog 2 calculate acceleration ax of the frog
Saturday, February 15, 2014 at 9:56am

physical science
A frog jumps at the angle of 60% to horizontal with initial velocity of 10.0m/s 1. calculate velocity Voy of the frog 2 calculate acceleration ax of the frog
Saturday, February 15, 2014 at 9:56am

physics
As a science project, you drop a watermelon off the top of the Empire State Building, 320 m above the sidewalk. It so happens that Superman flies by at the instant you release the watermelon. Superman is headed straight down with a speed of 37.0m/s .
Saturday, February 15, 2014 at 12:12am

Science
I believe the answer is c but I think most modern CRTs use deflection by magnetic coils. Some electrostatic devices are also used and this may be where the word "plate" comes from.
Friday, February 14, 2014 at 11:14pm

Science
in a cathode ray tube, the number of electrons that reach the florescent screen is controlled by the A. anode b. cathode. c. deflecting plate d. grid
Friday, February 14, 2014 at 9:20pm

Math
Everyone in Andy’s class has to do a science project. Out of the 20 students, 80% have completed their project. How many students still need to finish their projects (got 4 students)
Friday, February 14, 2014 at 6:46pm

English
Can someone check if the following prepositions/verbs are correct? Thanks 1) I couldn’t help CRYING 2) It’s no use EXPLAINING it to him; he won’t understand. 3) He was seen TO the watch. 4) I can’t afford TO BUY it. 5) Norma is anxious ABOUT making the ...
Friday, February 14, 2014 at 6:29pm

Physical Science Need Help Quick PLEASE:)
Ok Cool THANK YOU all
Friday, February 14, 2014 at 5:09pm

Physical Science
a = change in velocity/change in time = (11 - 0) / 10 = 1.1 m/s^2
Friday, February 14, 2014 at 12:43pm

Physical Science Need Help Quick PLEASE:)
Al;so go back and find I added to answers to your earlier questions
Friday, February 14, 2014 at 12:42pm

Physical Science Need Help Quick PLEASE:)
Newton - THIRD LAW use Google !!!!!
Friday, February 14, 2014 at 12:41pm

Science
divide the total distance by the total time. That gives the average SPEED. If you divide the total DISPLACEMENT (which includes the effect of the directions of the VELOCITY vectors) by the total time you get the average VELOCITY for example walk one mile north at 1 mile/hr ...
Friday, February 14, 2014 at 12:34pm

science
5
Friday, February 14, 2014 at 12:33pm

Science 8th Grade
divide the total distance by the total time. That gives the average SPEED. If you divide the total DISPLACEMENT (which includes the effect of the directions of the VELOCITY vectors) by the total time you get the average VELOCITY for example walk one mile north at 1 mile/hr ...
Friday, February 14, 2014 at 12:30pm

Physical Science Need Help Quick PLEASE:)
http://www.physicsclassroom.com/class/ne​wtlaws/u2l4a.cfm
Friday, February 14, 2014 at 12:23pm

Physical Science Need Help Quick PLEASE:)
Someone may be able to check your answer.
Friday, February 14, 2014 at 12:21pm

Physical Science Need Help Quick PLEASE:)
A polo player hits a ball with a mass of 0.42 kg with a force of 7.35 Newtons. How does the force the polo player's mallet exerted on the ball compare to the force the ball exerted on the mallet? A. The force of the mallet on the ball is equal in magnitude and opposite in ...
Friday, February 14, 2014 at 12:17pm

Physical Science
An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
Friday, February 14, 2014 at 11:35am

Science 8th Grade
How do you figure the average speed of something? What is the formula?
Friday, February 14, 2014 at 11:15am

Science
How do you figure the average speed of something? What is the formula is what I really need. :)
Friday, February 14, 2014 at 11:14am

Science 8th Grade
You are welcome.
Friday, February 14, 2014 at 11:13am

Science 8th Grade
ok ty
Friday, February 14, 2014 at 11:12am

Science 8th Grade
The hiker spent one hour going 6 km west.
Friday, February 14, 2014 at 11:12am

Science 8th Grade
What was the hiker's average velocity? Distance = 6km West Starting Time = 9:45 Ending Time = 10:45 A. 4.0 km/h south B. 0.10 km/h north C. 10 km/h south west D. 6 km/h west
Friday, February 14, 2014 at 11:08am

science
48 protons, 67 neutrons, and 46 electrons.
Thursday, February 13, 2014 at 11:31pm

science
What is the main consideration when choosing an appropriate outlet box?
Thursday, February 13, 2014 at 9:30pm

physical science
19. (2 points) Ball 2, with a mass of 30kg, is moving to the left at 10m/s. With what velocity should Ball 1, with a mass of 10kg, move to the right and collide with Ball 2, so that Ball 1 rebounds with a velocity of 30m/s, and Ball 2 with a velocity of 10 m/s, after the ...
Thursday, February 13, 2014 at 8:33pm

Science
You are welcome :)
Thursday, February 13, 2014 at 7:29pm

Science
Thanks
Thursday, February 13, 2014 at 7:28pm

Science
Yes
Thursday, February 13, 2014 at 7:28pm

Science
So it's 1?
Thursday, February 13, 2014 at 7:27pm

Science
Google "photosynthesis".
Thursday, February 13, 2014 at 7:23pm

Science
A plant deprives of light dies. Which of the following best explains why this happens? 1-The plant needs light to make it's food 2-Light allows the plant to make food for other organisms 3-Without light, the plant has no signals to be able to grow* 4-Plants need light to ...
Thursday, February 13, 2014 at 7:20pm

Social Studies--Check My Answers Please--
The computer is programmed to accept B for number 6.
Thursday, February 13, 2014 at 6:34pm

Social Studies--Check My Answers Please--
I agree with your answers. However, someone told us that the computer wants B.
Thursday, February 13, 2014 at 6:32pm

Science
Why did you post this here?
Thursday, February 13, 2014 at 5:33pm

Science
a,c,b,d,c,b,d,d,c,c,c
Thursday, February 13, 2014 at 5:32pm

Science
Cycads, ginkgo, gnetophytes, and conifers are all gymnosperms. The plant shown is a ---
Thursday, February 13, 2014 at 5:31pm

Science
What are your choices?
Thursday, February 13, 2014 at 4:47pm

Science
placental mammals develop what?
Thursday, February 13, 2014 at 4:35pm

Science ( Need help really bad Please!)
F = m g or Weight = mass * acceleration of gravity m is mass, sometimes in kilograms. It is the same everywhere and depends only on which proton and neurons are there and how many. g is the acceleration of gravity. On earth it is about 9.81 meters/second^2 On the moon for ...
Thursday, February 13, 2014 at 4:35pm

Science Please HELP!!!
The sporophyte generation produces spores that grow into a(n)?
Thursday, February 13, 2014 at 4:31pm

Science! just one question! help ASAP plzzz
Photosynthesis is required for this process to occur.
Thursday, February 13, 2014 at 3:43pm

science
I need help finding a PowerPoint with the importance of installation of actuator blocks on CH-47F aircraft or MH47 aircraft please.
Thursday, February 13, 2014 at 2:53pm

Science
You're correct. The answer is A.
Thursday, February 13, 2014 at 1:33pm

Science ( Need help really bad Please!)
really Really need help :)
Thursday, February 13, 2014 at 1:30pm

Science
You were close. Correct answers: B, D
Thursday, February 13, 2014 at 1:27pm

Science ( Need help really bad Please!)
An object's weight is dependent upon its location in the universe. Why is this true? A. This is true because weight is the magnitude of gravitational force acting on an object, and since gravitational force varies in different places in the universe, weight also varies. B...
Thursday, February 13, 2014 at 1:26pm

Physical Science
average a = 11/10 = ?
Thursday, February 13, 2014 at 12:46pm

Physical Science
An Olympic sprinter can go from a state of rest to 11 meters per second in 10 seconds. What is the average acceleration of the sprinter?
Thursday, February 13, 2014 at 12:10pm

science
The water exerts a force up on your hand equal to the weight of water displaced. Therefore an equal and opposite force is down on the scale. Ultimately that force comes from your arm pushing the finger down into the water. In the air there will be no effect because you are not...
Thursday, February 13, 2014 at 10:48am

science
A lever scale is balanced with a partially filled glass of water on one side. Will the balance be upset (and if so how?) if you put your finger carefully into the water without touching the glass? What happens if the beaker is filled with air instead of water?
Thursday, February 13, 2014 at 10:37am

Science
Here is a site that does a much better job than I can do on this site. An atom that has one or more electrons too many or too few for the neutral atom is an ion.
Wednesday, February 12, 2014 at 10:47pm

Science
how do you draw a bohr diagram of a atom and a ion and how are they different????
Wednesday, February 12, 2014 at 10:22pm

physical science
a. Fap-Ff = m*a = m*0 Fap - Ff = 0 The velocity is constant. Therefore, the acceleration is zero. Fap = Force applied. Ff = Force of friction. b. Fap - Ff = 0 100 - Ff = 0 Ff = 100 N.
Wednesday, February 12, 2014 at 9:28pm

Science
idk
Wednesday, February 12, 2014 at 8:59pm

Science Mixture
No. Sugar dissolves in H2O and the sugar in solution goes through the filter paper with the H2O. However, if you had a saturated solution of sugar (it would take a lot of sugar because of the high solubility), you could separate by filtration that part that was not dissolved
Wednesday, February 12, 2014 at 8:35pm

Science Mixture
Could you use the filtration method to separate a sugar water solution? Why or why not?
Wednesday, February 12, 2014 at 7:19pm

physical science
2
Wednesday, February 12, 2014 at 2:20pm

science(please check answers)
When I do some research I will try to find some of the answers
Wednesday, February 12, 2014 at 1:52pm

science
14 is ok but 15 still is wrong.
Wednesday, February 12, 2014 at 1:39pm

science
refraction, diffraction, and interference can all be explained using Huygens' principle, see: http://farside.ph.utexas.edu/teaching/30​2l/lectures/node150.html Polarization on the other hand requires electromagnetic principles. (E cross H)
Wednesday, February 12, 2014 at 1:36pm

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