Homework Help: Computers: Computer Science

Recent Homework Questions About Computer Science

Science
3. Which of the following conditions would likely cause the activation energy to be high? A.atoms are close together B.the temperature is hot C.atoms are not close together * D.a catalyst is present 4. Which of the following materials will burn the fastest in open air? A.a log...
Sunday, March 3, 2013 at 12:30am

physical science
Hypothesize how the pH of white vinegar would change if an ammonia solution was added to it a drop at a time. White vinegar has a pH of 3.1
Saturday, March 2, 2013 at 4:33pm

chemistry
Determining Chemical Formulas? This was on my test a few days ago for Basic Chemistry, I received 8/20 and I'd really like to see how to work these problems out. *PLEASE SHOW WORK*. Their are four parts to this, If anyone could answer all four with easy explanations and ...
Saturday, March 2, 2013 at 3:35pm

Science
Calculate the wavelength of a proton with energy 2.45 eV. Enter the numerical value in m
Saturday, March 2, 2013 at 1:30pm

Science
Calculate the wavelength of a photon with energy 2.45 eV. Enter the numerical value in m
Saturday, March 2, 2013 at 1:29pm

Science
An electron in Li2+ falls from n = 2 to the ground state. Calculate the wavenumber, (νˉ), of the emitted photon.
Saturday, March 2, 2013 at 1:27pm

Science
Calculate the wavelength, λ, in meters of a photon capable of exciting an electron in He+ from the ground state to n = 4.
Saturday, March 2, 2013 at 1:27pm

Science
Determine the minimum electric potential difference (in volts) that must be applied to accelerate an α-particle so that on interaction with a hydrogen atom, a ground state electron will be excited to n = 6.
Saturday, March 2, 2013 at 1:27pm

Science
A photon with a wavelength (λ) of 3.091 x 10–7 m strikes an atom of hydrogen. Determine the velocity (in meters/second) of an electron ejected from the excited state, n = 3.
Saturday, March 2, 2013 at 1:26pm

Science
Which atom or ion would you expect to have the smallest radius? Ne F- Na+ Ne-
Saturday, March 2, 2013 at 1:24pm

science
information on sicled cells disease how they work,how do you get it etc
Saturday, March 2, 2013 at 12:34pm

windows 7
A ________is software that installs and sets up programs to run on your computer. A.intitator B.installer c.downloader d.applicator
Saturday, March 2, 2013 at 12:09pm

computer
Using pseudocode, write a program on how you turn a corner in an automobile. Note that there is a stop sign in the intersection. Determine the logical steps involved and write the pseudocode. Consider the following questions when completing your assignment: • What are ...
Saturday, March 2, 2013 at 12:54am

physical science
You wish to heat 30 kg of water from 60°C to 80°C. How many kcal of heat are necessary to do this? To how many kJ does this correspond?
Saturday, March 2, 2013 at 12:26am

science
Suppose that the 1.3 km span of the golden gate bridge had no expansion joints. Calculate how much longer the bridge would be if the temperature of the bridge increases by 35 degrees celsious
Friday, March 1, 2013 at 7:43pm

science
a cheetah runs at a speed of 30.0m/s. How long does the cheetah take to run 90.0m
Friday, March 1, 2013 at 5:43pm

Physical Science
ok so i keep getting one wrong on a 4 question test and failing so can someone tell me what im getting wrong 1. What causes an electric current in a wire? A. Electric fields cause atoms to move in the wire. B. Electrons flow because of electrical attraction and repulsion. C. ...
Friday, March 1, 2013 at 5:03pm

science
Which of the following is true about an object that floats in water? (1 point) The object is less dense than frozen water. The mass of the object is less than that of water. The density of the object is less than that of water. The volume of the water is greater than the ...
Friday, March 1, 2013 at 4:32pm

science
3. Atmospheric pressure at the top of Mt. Everest is about 150 mm Hg. That is why climbers always bring oxygen tanks. If a climber carries a 12.0 liter tank with a pressure of 35,000 mm Hg, what volume will the gas occupy if it is released at the top of Mt. Everest?
Friday, March 1, 2013 at 4:08pm

science
1. Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why in your own words.
Friday, March 1, 2013 at 4:08pm

Science
If there was zero change in Earth’s eccentricity, how might that affect the possibility of an ice age?
Friday, March 1, 2013 at 12:52pm

science
A substance has a mass of 12.5 grams and a volume of 9.8 ml.Will the object sink or float in water?
Friday, March 1, 2013 at 11:51am

Science
How do mutations lead to cancer?
Thursday, February 28, 2013 at 11:30pm

SCIENCE
what bicycle parts help the downhill race bike and road race bike and why are they different from normal bikes?
Thursday, February 28, 2013 at 10:23pm

Science
what is similar about a dead load and a live load and what is different? please help
Thursday, February 28, 2013 at 9:22pm

Science ASAP
1. Why is mining important to the economy of the United States? It employs many workers. Gold is expensive. Minerals are shipped to Canada. Industries use minerals. 2. What did the British North American Act accomplish? It divided Canada. Canada became an independent nation. ...
Thursday, February 28, 2013 at 8:48pm

science
Two students play in a drumb band. Explain how the students make sounds on the drums. Then explain how one student can make a soft sound while the other student makes a loud sound
Thursday, February 28, 2013 at 7:17pm

Science
can you please tell me what is the answer to the When the parrot is hungry it makes this noise? thanks
Thursday, February 28, 2013 at 7:09pm

Science
How do you balance this equation? Fe2O3+C=Fe+CO2
Thursday, February 28, 2013 at 5:44pm

NJHS Letter Check (plz read it's really important)
I'm writing a letter to the adviser of the NJHS in my school. Please read to see if it's good. If your confused about my post, just read the letter and you'll understand why I'm writing a letter to the adviser and why I post this post. Dear Ms. L, I'd been ...
Thursday, February 28, 2013 at 5:43pm

science
10. A balloon has a volume of 0.5 L at 20°C. What will the volume be if the balloon is heated to 150°C? Assume constant pressure and mass.
Thursday, February 28, 2013 at 4:43pm

science
7. A helium balloon has a pressure of 40 psi at 20°C. What will the pressure be at 40°C? Assume constant volume and mass.
Thursday, February 28, 2013 at 4:38pm

science
1. Boyle’s law states that if you squeeze a fixed amount of a gas into a smaller volume, the pressure will increase. Explain why in your own words.
Thursday, February 28, 2013 at 4:35pm

Science!! please help me could you write it to me
Two students play in a drumb band. Explain how the students make sounds on the drums. Then explain how one student can make a soft sound while the other student makes a loud sound
Thursday, February 28, 2013 at 3:46pm

science
are carbon particles and sugar an element, compound,solution, or heterogeneous mixture?
Thursday, February 28, 2013 at 2:49pm

science
how to calculate 10,000 PE in peson equivalent?
Thursday, February 28, 2013 at 11:28am

Physical Science
what will have a greater effect on the intensity of a sound, doubling its power or halving its distance? Explain your answer.
Thursday, February 28, 2013 at 11:25am

science
The relationship between a fungus and a green organism is an example of a. neighbors. b. mutualism. c. parasitism. d. saprophytes. In a lichen,does the organism with chlorophyll provides the food?? and is Reindeer moss a lichen??
Thursday, February 28, 2013 at 10:42am

physical science
You are at a concert and you are located 91.2-m from the speakers. The frequency belting from the speakers are 291-Hz, if it takes 0.230-sec for the sound to reach your location what is the sounds wavelength?
Thursday, February 28, 2013 at 9:37am

physical science
You are at a concert and you are located 95.9-m from the speakers. The frequency belting from the speakers are 257-Hz, if it takes 0.503-sec for the sound to reach your location what is the sounds wavelength?
Thursday, February 28, 2013 at 9:36am

physical science
You are at a concert and you are located 97.5-m from the speakers. The frequency belting from the speakers are 216-Hz, if it takes 0.181-sec for the sound to reach your location what is the speed of sound in this facility?
Thursday, February 28, 2013 at 9:35am

Science SMI181Q
What volume of hydrogen chloride gas is produced by the reaction of 40 cm3 of chlorine with hydrogen? (First write a balanced equation).
Thursday, February 28, 2013 at 8:21am

science
if a sample of rock starts out with 32 atoms of carbon-14 how much carbon-14 would be left after 5,700 years
Thursday, February 28, 2013 at 1:01am

Physical Science
Find the change in the force of gravity between two planets when their masses remain the same but the distance between them is increased by 10 times.
Wednesday, February 27, 2013 at 11:19pm

Science
In the following reaction, how many liters of oxygen will react with 270 liters of ethene (C2H4) at STP? C2H4(g) + 3O2(g) ---> 2CO2(g) + 2H2O(g) The volume of one mole of gas at STP is 22.4 liters.
Wednesday, February 27, 2013 at 9:39pm

math
Lee buys a computer and a printer for $2,028. The printer costs 30% of the price of the computer. What is the price of the computer?
Wednesday, February 27, 2013 at 9:13pm

science
Imagine that you fill a bucket to the top with water and then place the bucket outside in freezing weather. Which of the following describes what will happen when the water in the bucket freezes? A. The level of the water and the bucket itself will not be changed by becoming ...
Wednesday, February 27, 2013 at 9:07pm

science
What is an automatic nerve response?
Wednesday, February 27, 2013 at 9:00pm

Science
What are the types of ploughing?
Wednesday, February 27, 2013 at 8:38pm

SCIENCE
what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by copper? PLEASE HELP ME ON...
Wednesday, February 27, 2013 at 7:38pm

Chem
The National Institute of Science and Technology (NIST) kinetics database lists the rate constant, k, of a particular gaseous reaction as 5.78× 10–10 cm3·molecule^–1·s^50;1 at 298 K. Convert this constant, k, to torr^-1 X S^-1.
Wednesday, February 27, 2013 at 5:59pm

Science
George walks 3 km on Monday and 4 km of Tuesday and 2.5 km on Thursday. On Monday, he walks 25 mins., Tuesday 40 mins., and Thursday 30 mins. What is his average speed? d= t= help please
Wednesday, February 27, 2013 at 5:17pm

science/math
Kelly hiked a total of 4 miles in 80 minutes. How fast was Kelly walking.
Wednesday, February 27, 2013 at 4:45pm

Science
The two objects shown are the same size. However, one object is made of wood, and the other object is made of plastic. Which of the following properties of the objects will be the same?
Wednesday, February 27, 2013 at 3:35pm

science
: how much work is done by 0.020 meters squared of gas if its pressure increases by 2.0 multiplied by 10 to the 5th power Pa and the volume remains constant ?
Wednesday, February 27, 2013 at 10:50am

Science
Describe how you would prepare 25.0ml of a 1.00 M NaOH solution.
Wednesday, February 27, 2013 at 10:09am

quantitative rsearch
A manufacterer of computers designed to aid social scientists in analyzing rsearch data claims that are operational for at least 80% of the time . during the course of the year one computer was operational for 270 days. test, at the 1% CONFIDENCE LEVEL, whether the ...
Wednesday, February 27, 2013 at 9:44am

science
why should nucleotides be in proper sequence during protein synthesis?
Wednesday, February 27, 2013 at 9:39am

statistics
A professional employee in a large corporation receives an average of = 45 e-mails per day. Most of these e-mails are from other employees in the company. Because of the large number of e-mails, employees find themselves distracted and are unable to concentrate when they ...
Wednesday, February 27, 2013 at 9:35am

science
calculate the change in entropy when 1.00g of oxygen at 27 degree celsius is expanded from 1 dm 3 to 4 dm3
Wednesday, February 27, 2013 at 5:59am

economics
šPlease explain these question in words! š How will demand and supply curve shift? 1. Labor market for math and science teachers when wages available in private industries utilizing these skills rise. 2. Labor market for university professors when college...
Wednesday, February 27, 2013 at 1:28am

science
What is the highest and lowest temperature in the exosphere? or just the highest temperature.
Tuesday, February 26, 2013 at 11:18pm

science
You are standing stationary along the side of the railroad tracks. A toy cannon shoots a baseball at 9 m/s. The cannon is mounted facing forward on the handlebars of a bike. Your friend is riding the bike from the front toward the back of a train car at 5 m/s. The train is ...
Tuesday, February 26, 2013 at 8:35pm

SCIENCE URGENT HELP
what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the names of any organisms that are affected and how they are affected by copper? pLEASE HELP ME ON...
Tuesday, February 26, 2013 at 8:14pm

Science!! please help me could you write it to me
Name one similarity and one difference between pitch and loudness
Tuesday, February 26, 2013 at 8:14pm

Science
i need to unscramble a phrase about Plate Tectonics with these letters: rorpsfgnlsadeeasi
Tuesday, February 26, 2013 at 8:06pm

science
Name one similarity and one difference between pitch and loudness.
Tuesday, February 26, 2013 at 7:56pm

Science
what are some health risks of copper to humans? what are the environmental riks of copper? what are the benefits of copper to the industry, economy, and society? what are all the organisms that are affected by copper? what is meant by the term Bioaccumulation? Include the ...
Tuesday, February 26, 2013 at 7:53pm

Science 8R - HELP!
what is the difference between weathering and erosion???
Tuesday, February 26, 2013 at 7:44pm

science
Why do manufacturing industries have more problems controlling pollution then other kinds of businesses have?
Tuesday, February 26, 2013 at 7:41pm

science
50 ml of water in a beaker will exert what pressure on the beaker than 50ml of water in a 350ml beaker
Tuesday, February 26, 2013 at 7:34pm

science
Expain why deep sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?
Tuesday, February 26, 2013 at 5:51pm

science
Expain why deepa sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?
Tuesday, February 26, 2013 at 5:35pm

science
why is viscosity such an important property of matter?
Tuesday, February 26, 2013 at 4:57pm

Science
Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that is, you ...
Tuesday, February 26, 2013 at 4:51pm

Science ASAP
Can you tell me the Main Idea(s)? There’s an old saying that oil and water don’t mix. But sometimes they do — especially when a chemical called a surfactant brings the two together. Once blended, oil and water become tough to pull apart. Unless, that is, you ...
Tuesday, February 26, 2013 at 4:16pm

Grammar-Check answers
While I was researching skateboards, I found an interesting old newspaper story. In the June 29, 1999 edition of the Mercury, there was an article on skateboarding. Some scientists in San Francisco, California filmed skateboarders in action. As they studied the film, they ...
Tuesday, February 26, 2013 at 12:20pm

economic and management science
discuss the development of money
Tuesday, February 26, 2013 at 11:35am

Science
What is the momentum of a 50 kg carton that slides at 2 m/s across an icy surface? The sliding carton skids onto a rough surface and stops in 3 s. Calculate the force of friction it encounters.
Tuesday, February 26, 2013 at 10:43am

science
find the theoreticval value of the period of a pendulum of length 0.9 meters located on the surface of the earth.
Tuesday, February 26, 2013 at 10:18am

science
7750 Joules of energy is added to a 325 grams stone at 24.0 degrees centigrade. The temperature increases by 75.0 degrees centigrade. What is the specific heat of the stone?
Tuesday, February 26, 2013 at 9:37am

science
what are human factors that causes illhealth,accidents and disasters
Tuesday, February 26, 2013 at 2:39am

science
what is the structural formula for a) 3,3,4-trimethyloctane B) 2-methyl-1-pentene
Tuesday, February 26, 2013 at 12:04am

science
What is the term used to describe making older buildings more resistant to earthquakes?
Monday, February 25, 2013 at 10:36pm

math
Ted made a scale model of a submarine for his science class. a. What is the volume of Ted’s model? b. If 1 inch in the model represents 20 feet in the actual submarine, what is the volume of the actual submarine? front round is 3 inch radius/length 3 inch cylinder is ...
Monday, February 25, 2013 at 8:45pm

science
While rearranging a dorm room, a student does 287 J of work in moving a desk 2.5 m. What was the magnitude of the applied horizontal force?
Monday, February 25, 2013 at 8:33pm

Math
You have 34 math and science problems for homework. You have 10 more math problems then science, how many of each do you have?
Monday, February 25, 2013 at 6:38pm

science
A 75-N sack is dragged along the floor with a horizontal force of 100N. The frictional force is 30N. What is the direction of net force
Monday, February 25, 2013 at 5:25pm

management science
definitions of marketing,the author and the year
Monday, February 25, 2013 at 2:31pm

science
Describe the events that take place in the movement of fluid in the capillary beds. What forces are involved in the movement of fluid out of the capillaries and back in again? Where in the capillary does movement take place? What is the role of the lymphatic system in the ...
Monday, February 25, 2013 at 1:51pm

science
if solubility of ammonium chloride is 55 at 60 degree celsius,.What is the amount of ammonium chloride dissolved in 40 gram of saturated solution at that temperature ?
Monday, February 25, 2013 at 12:12pm

science
A car with a mass of 700 kg moves at 18 m/s. What braking force is needed to bring the car to a halt in 10 s?
Monday, February 25, 2013 at 11:37am

math probability
maria thinks she has a 7 out of 10 chance of getting an A in Science, and an 85% chance of getting an A in math. Assuming these are independent events, what is her proability of getting an A in both classes?
Monday, February 25, 2013 at 9:21am

SCIENCE
THE VALUE OF KC=6.2 AT 750K FOR THE REACTION CO+H20 <--> CO2.IF INITIALLY THE QUANTITIES OF CO AND H2O ARE 2 MOLES IN 1L.WHAT COULD BE THE EQUILIBRIUM CONCENTRATIONS FOR ALL CHEMICALS?
Monday, February 25, 2013 at 1:41am

calc 2
A computer takes 2 seconds to compute a particular definite integral accurate to 4 decimal places. Approximately how long does it take the computer to get 12 decimal places of accuracy using each of the LEFT, MID, and SIMP rules? Round your answers to one decimal place. (a) ...
Monday, February 25, 2013 at 12:05am

science
Using the equation: work = force x distance tell me how much work is done when a boy applies 5 Newtons of force over a distance of 2 meters. A)10 Watts B)10 Joules C)10 Amps D)10 Newtons
Sunday, February 24, 2013 at 9:28pm

science
A 65.7 kg person jumps from a window to a fire net 21.0 m below, which stretches the net 1.14 m. Assume that the net behaves like a simple spring, and calculate how much it would stretch if the same person were lying in it.
Sunday, February 24, 2013 at 7:44pm

science
What is the gram formula mass of NaC2H3O2 multiplied by 10H2O
Sunday, February 24, 2013 at 6:44pm

Science
What is convection?
Sunday, February 24, 2013 at 6:27pm

Science
Solution preparation: 500ml's of .2M Sodium Cacodylate Buffer with a pH of 7.4 I don't even know where to start, could someone please tell me how to do this problem.
Sunday, February 24, 2013 at 6:24pm

management science
10 definitions of what marketing is, the authors and year
Sunday, February 24, 2013 at 9:25am

management science
can you please give me 10 good definitions of what a marketing is, the authors and the date it was defined
Sunday, February 24, 2013 at 7:58am

physics
Explain the changes in frequency with respect to changes in mass, length tension on sonometer bridge.
Sunday, February 24, 2013 at 4:39am

computer science
Im trying to create an arraylist that's sorted but I have no idea how to sort the numbers. I cant use the array.sort method here is my code: public class Testing { private int [] data; private int count; private static int defCapacity = 10; public Testing (){ count = 0; ...
Sunday, February 24, 2013 at 1:19am

physical
A computer is reading data from a rotating CD-ROM. At a point that is 0.036 m from the center of the disc, the centripetal acceleration is 120 m/s2. What is the centripetal acceleration at a point that is 0.056 m from the center of the disc?
Sunday, February 24, 2013 at 1:03am

science
what are three opposites or non-examples of fossil records?
Saturday, February 23, 2013 at 10:50pm

Finite Math
6. A computer company has two manufacturing plants, one in Rochester and one in Queens. Transporting a computer from Rochester to the retail outlet takes 15 hours and costs $15, while transporting a computer from Queens to the retail outlet takes 20 hours and costs $30. The ...
Saturday, February 23, 2013 at 10:08pm

science
name three examples of a fossil record
Saturday, February 23, 2013 at 10:01pm

Math
In a computer lab there are two dierent printers. From 1pm-2pm Printer1 receives on average 12 print jobs and Printer2 receives on average 5 print jobs. Assume the number of print jobs requested on Printer1 and on Printer2 are independent of each other. (a) Defi ne random...
Saturday, February 23, 2013 at 8:45pm

Science
A race car, moves at a constant speed around an oval track. Is the car accelerating? Why or why not?
Saturday, February 23, 2013 at 8:12pm

science
Create a SOAP note using five medical words from the urinary or male reproductive system
Saturday, February 23, 2013 at 7:24pm

Science
What did Oprah Winfrey do for 152 exceptional girls in South Africa? Select one: a. She gave each of them college scholarships. b. She helped them attend school in the United States. c. She invited them to attend her new school. d. She convinced them to leave South Africa. ...
Saturday, February 23, 2013 at 7:14pm

science
Using either or both chapters (6 and/or 7) create a SOAP note using five medical words discussed in this week’s reading. urinary and male reproductive system
Saturday, February 23, 2013 at 7:10pm

science
The atmospheres of Mars and Venus are mostly carbon dioxide. Earth’s atmosphere contains only a fraction of a percent of carbon dioxide. Why is Earth’s atmosphere so different from those of Mars and Venus?
Saturday, February 23, 2013 at 7:03pm

science
How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?
Saturday, February 23, 2013 at 5:07pm

Science
Would the function of the lung be affected if the alveoli were surround by walls made of several layers of cells rather than a single layer of cells? How?
Saturday, February 23, 2013 at 4:56pm

Science
a sample of an unknown metal has a mass of 21.6g and a volume of 8.00cm^3 . calculate the density of the unknown metal
Saturday, February 23, 2013 at 3:17pm

Earth Science
Which organism evolved before the others in geologic time? mammals amphibians reptiles **fish Which type of organism evolved later than the others? **mammals amphibians reptiles fish
Saturday, February 23, 2013 at 2:39pm

Science
What units of measurement do you use to measure the earth to... 1. Moon 2. Galaxy 3. Sun 4. Communication satellite 5. Pluto 6. Proxima Centauri
Saturday, February 23, 2013 at 1:07pm

Science
in what ways do you think earth's moon may be similar to mercury
Saturday, February 23, 2013 at 9:26am

science
The acceleration of gravity on the surface of Venus is 8.9m/s^2. Would a ball thrown upward on Venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?
Friday, February 22, 2013 at 11:32pm

science
A force of 20 N gives an object an acceleration of 5m/s^2. (a) What force would be needed to give the same object an acceleration of 1m/s^2? (b) What force be needed to give it an acceleration of 10m/s^2?
Friday, February 22, 2013 at 11:29pm

Marine science
A cylindrical container is 30cm in diameter. If is filled at rest by 20 cm of fresh water, and then spun at 30 rpm. after state of solid body rotation is achieved, what is the difference in level between the rim and the center
Friday, February 22, 2013 at 7:49pm

Science
Proteins found on the outside of cells and viruses are called ____________ , these are used by the body to _______________ pathogens. antigens; help antibodies; make antigens; identify antibodies; reproduce Identify the response below that summarizes the correct sequence of ...
Friday, February 22, 2013 at 7:43pm

science
A toyota engine has an efficiency of 45% and produces 3010J of work. How much heat does the engine reject?
Friday, February 22, 2013 at 3:45pm

science
In seed plants, what is an important difference between gymnosperms and most angiosperms? A)Gymnosperms rely on animals to carry pollen from the female gametophyte to the male gametophyte, while angiosperms rely on wind. B)Gymnosperms require water for sperm to travel from the...
Friday, February 22, 2013 at 2:35pm

Science
If the competing equilibria are ignored, does that mean the value of their equilibrium constant cant be calculated?
Friday, February 22, 2013 at 2:16pm

science
The mean weight of 500 male students at a certain college is 151 pounds (lb), and the standard deviation is 15 lb. Assuming that the weights are normally distributed, find the probability of students weight (a) between 121 and 155 lb (b) more than 185 lb. c) if 4% of the ...
Friday, February 22, 2013 at 7:06am

science
3. In a sample of 64 students given an examination in statistics, it is found that the mean weight is 57 kg with standard deviation 9 kg. Find : ƒÜ i) The proportion of students weight 48-62 kg. ƒÜ ii) The proportion of those less than 72 kg. ƒÜ ...
Friday, February 22, 2013 at 7:04am

Science
Explain how atoms and elements differ from one another.
Thursday, February 21, 2013 at 10:32pm

Finance
1. Firm L has debt with a market value of $200,000 and a yield of 9%. The firm's equity has a market value of $300,000, its earnings are growing at a rate of 5%, and its tax rate is 40%. A similar firm with no debt has a cost of equity of 12%. Under the MM extension with ...
Thursday, February 21, 2013 at 9:49pm

science
what other adaptations might contribute to the bat's success as a predator
Thursday, February 21, 2013 at 8:45pm

Science
Which of the following bonds is polar? A.F—F B.O—H C.O—O D.H—H I think it is B...?
Thursday, February 21, 2013 at 8:38pm

science
why do rubber tires deteriorate more rapidly in polluted areas than in the countryside
Thursday, February 21, 2013 at 6:39pm

Science
Calculate the power that will pull a mass of 210kg at a constant velocity of 3.9m/s down an inclined plane which makes an angle of 17 degrees with the horizontal.The frictional force is 302N
Thursday, February 21, 2013 at 6:17pm

science
The moon is the earth's nearest neighbor in space the radius of the moon is approximately one quarter of the earth's radius and it's mass is one eightieth of the earth's mass.(a)calculate the weight of an object with a mass of 50.0kg on the surface of the moon...
Thursday, February 21, 2013 at 4:21pm

science
__________ do not have tissues and organs A. soft bodied animals b. sponges c. stinging- cell animals is a free-living worm parasitic?? and do tapeworms use food another animal eats???
Thursday, February 21, 2013 at 4:15pm

science
jellyfish are classified as stinging-cell animals because they have a a. hollow body b. segmented body c. shell d. round body is a planarian is a parasite?
Thursday, February 21, 2013 at 3:25pm

science
A ball having a mass of 0.20 kilograms is placed at a height of 3.25 meters. If it is dropped from this height, what will be the kinetic energy of the ball when it reaches 1.5 meters above the ground?
Thursday, February 21, 2013 at 2:26pm

science
While rearranging a dorm room, a student does 286 J of work in moving a desk 1.3 m. What was the magnitude of the applied horizontal force?
Thursday, February 21, 2013 at 2:25pm

Science
Why not chicken lay eggs during nitht time? I want detail explanation.
Thursday, February 21, 2013 at 2:07pm

science
A man has a mass of 80.0kg is standing on the surface of the earth.(a)calculate the magnitude of the attractive force that the earth exerts on the man
Thursday, February 21, 2013 at 2:02pm

science
While rearranging a dorm room a student does 286 J of work to move a desk 1.3 m. What was the magnitude of the applied horizontal force?
Thursday, February 21, 2013 at 1:58pm

science
what is so special about the elements in Group 8 on the Periodic table?
Thursday, February 21, 2013 at 1:43pm

science
What do all the elements in Group 8 have in common?
Thursday, February 21, 2013 at 1:41pm

science
List 3 other elements similar to properties of Flourine. a. Why did you choose these? b. How did you determine their properties were similar?
Thursday, February 21, 2013 at 1:40pm

science
Name 2 elements that would have properties similar to Beryllium with atomic weight higher than 130.
Thursday, February 21, 2013 at 1:36pm

science
What properties did Mendeleyev use to sort the elements in his table?
Thursday, February 21, 2013 at 1:32pm

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