Homework Help: Computers: Computer Science

Recent Homework Questions About Computer Science

Science- Chemistry
A test tube containing a mixture of compounds X, Y, and a small amount of Z weighs 25.4886 g. The tube is emptied into a beaker and the empty tube is reweighed, giving a value of 10.2586 g. The mixture is separated into two components by dissolving in water, filtering off the ...
Saturday, October 13, 2012 at 5:51pm

physical science
A 0.50 kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 8.0 N for a distance of 7.5 m. What is the velocity of the block in m/s?
Saturday, October 13, 2012 at 4:55pm

science-physics
A machine gun of mass 10 kg fires 20g bullets at the rate of 10 bullets per second, with the speed of 500 m/s. What is the force necessary to hold the gun in position?
Saturday, October 13, 2012 at 3:13pm

SCIENCE
Why might there be different kinds of thermometers for measuring temperature?
Saturday, October 13, 2012 at 9:01am

science
Explain how to measure the volume of a rock by water displacement?
Friday, October 12, 2012 at 8:09pm

science
40 centimeters cubed of dry sand is added to a graduated cylinder containing water, the level of the liquid rose 15 centimeters cubed on the scale. What is the volume, in centimeters cubed of air in the sand?
Friday, October 12, 2012 at 8:08pm

science
A 10 centimeters cubed sample of salt having a mass of 8 grams is added to 20 centimeters cubed of water having a mass of 15 grams. What is the mass of the mixture?
Friday, October 12, 2012 at 8:07pm

Physical Science
You submerge 100 grams of steel in 200 grams of water. If the steel has an initial temperature of 80°C and the water has an initial temperature of 10°C, what is the final temperature of the system? The specific heat capacity of the steel is 0.15 cal/g•°C
Friday, October 12, 2012 at 5:19pm

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?
Friday, October 12, 2012 at 5:09pm

physical science
suppose you want to heat 40g of water by 20c.how many joules of heat are required
Friday, October 12, 2012 at 4:24pm

Physics, science,
I'm desperate Please help 2. A bird, starting from rest, accelerates at 3 m/s2 north for 5 seconds. It then sees the rest of its flock and turns due east accelerating from its previous speed to 20 m/s in 2 seconds. A. What is the velocity of the bird after the initial leg...
Friday, October 12, 2012 at 4:14pm

Computer Science(python)
Service Price Basic Lawn Mowing $20 Trimming and Sweeping $25 Pool Cleaning $50 Watering Plants $10 Prompt the user to input whether or not they want each of the services. You can assume the input will be a character that is either a 'y' or an 'n'. Print out ...
Friday, October 12, 2012 at 4:02pm

science
Suppose that the 1.3 km span of the Golden Gate Bridge had no expansion joints. Calculate how much longer the bride would be if the temperature of the bridge increases by 35°C.
Friday, October 12, 2012 at 3:28pm

pysical science
an object who's mass is 5.20kg has a gravitational potential energy of 10.30kJ. How highh above the ground is the object
Friday, October 12, 2012 at 3:18pm

Science
How much heat is necessary to heat 100 g of water at 10°C to 95°C?
Friday, October 12, 2012 at 2:51pm

Physical Science
A 100 kg sample of a metal is cooled from 100°C to 20°C by removing 20 kcal of heat. Calculate the specific heat capacity of the metal.
Friday, October 12, 2012 at 2:39pm

Science/C
A 250 gram sample of metal is warmed from 50°C to 90°C when 100 calories of heat are added. What is he specific heat capacity of the metal?
Friday, October 12, 2012 at 2:34pm

Physical Science
A 100 kg sample of a metal is cooled from 100°C to 20°C by removing 20 kcal of heat. Calculate the specific heat capacity of the metal.
Friday, October 12, 2012 at 2:24pm

science
decomposing 0.00153 moles cholesterol will release what volume of hydrogen atoms?
Friday, October 12, 2012 at 2:21pm

Science
calculate the solubility of NaCl in a solution which contains 0.1 M CaCl2
Friday, October 12, 2012 at 11:02am

Science
what is solubility of NaOH at pH 5.5 and 8.0 when Ksp for NaOH is 5x 10^-10
Friday, October 12, 2012 at 10:59am

Science
Please,can anybody answer this question? How osmosis and diffusion explain why cell size is small ?
Friday, October 12, 2012 at 1:55am

science
Two mineral samples have the same mass. Which of the following statements is Ture? A. They don't have same density. B. They have the same volume. C. They are the same material.
Thursday, October 11, 2012 at 10:24pm

science
X needs to find the density of a cube. Each side of the cube measures 3 cm and the mass of the cube is 12 g. What is the approximate density of the cube.
Thursday, October 11, 2012 at 10:13pm

science
Why does the sun and moon appear to be the same size when viewed from earth.My answer is because the sun is bigger than the moon. Am I correct
Thursday, October 11, 2012 at 10:02pm

science
A sample containing .347 moles of an element has a mass of 39.00 g. What is the element?
Thursday, October 11, 2012 at 9:01pm

Enviromental Science
What effect could an uncontrollable grass carp population have on the energy pyramid of an lake environment?
Thursday, October 11, 2012 at 8:25pm

Physical Science
After a sled has passed several times over a snowy path on a hill, the grass or dirt under the snow may begin to show through where the sled has traveled. Why?
Thursday, October 11, 2012 at 8:20pm

Science
When a car slams on its brakes what provides friction that helps the car stop? What kind of energy is produced?
Thursday, October 11, 2012 at 8:03pm

physics
A science student is riding on a flatcar of a train traveling along a straight, horizontal track at a constant speed of 12.8 m/s. The student throws a ball into the air along a path that he judges to make an initial angle of 67.0° with the horizontal and to be in line with...
Thursday, October 11, 2012 at 7:20pm

Physical Science
if you tear a piece of material in haft, how is the density affected? sorry i repost it, just the title
Thursday, October 11, 2012 at 7:10pm

Physical Science
What is the force of an 18kg object accelerating at 4m/a squared?
Thursday, October 11, 2012 at 6:36pm

Science
332 dg = how many mg?
Thursday, October 11, 2012 at 6:25pm

science
82 liters plus 3.876 liters is what?
Thursday, October 11, 2012 at 6:12pm

Science 8R - help!!!!
if you tear a piece of material in haft, how is the density affected?
Thursday, October 11, 2012 at 6:05pm

science
substance a has a boiling point of 80% C and a density of 3.5 g/cc what is it and why
Thursday, October 11, 2012 at 5:57pm

science
A point object is acted upon by forces of 4N, 5N and 6N is in equilibrium. IF=f the 6N force is removed, what is the resultant force on the object now? I really want to know how tow find relationship between 3 forces, and is there anything to do with cos rule??? HELPPPPP-.-
Thursday, October 11, 2012 at 5:10pm

Math
A certain computer can perform 10 to the 5th power calculations per second. How many calculations can it perform in 10 seconds?
Thursday, October 11, 2012 at 5:06pm

Economics
You have opened your own word processing service. You have already bought a special computer needed for word processing and paid $5,000 for it. However, due to the cost changes in the computer industry, the current price of an equivalent machine is $2,500. You could sell any ...
Thursday, October 11, 2012 at 2:52pm

science
A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 5.3 m waterfall. The spy’s speed is 16 m/s and the officials’ speed is ...
Thursday, October 11, 2012 at 1:20pm

science
The volume of a 500 g sealed packet is 350 cm cube . Will the packet float or sink in water if density of water is 1 g cm raised to -3 ? What will be the mass of water displaced by this packet ?
Thursday, October 11, 2012 at 10:21am

science
How would I use the particle theory of matter to explain air having mass? I can't figure out a way to put it into words
Thursday, October 11, 2012 at 1:09am

7th grade science help Ms.Sue please help
1. A behavioral adaptation in which animals undergo a period of greatly reduced activity in winter is _____. (1 point) clusters hibernation burrows estivation 2. Climatologists use a classification system developed in 1918 by _____. (1 point) Köppen Einstein Galileo ...
Wednesday, October 10, 2012 at 10:33pm

7th grade science weather Ms.Sue help please
1. Which of the following facts might be related to polar climates? (1 point) Solar energy hits these regions at a low angle. Year-round temperatures are always hot. These regions lie between latitudes 23° north and 23° south. Temperatures in these zones are moderate. ...
Wednesday, October 10, 2012 at 10:23pm

science
if 25 ml of sugar is mixed with 299 ml of water and then 50 ml of water is poured out, how much sugar remains in the 150 ml of wtare?
Wednesday, October 10, 2012 at 9:52pm

science
Who was One of the first people to state that matter is made up of atoms was A. Democritus B. Rutherford C. dalton D. Aristotle
Wednesday, October 10, 2012 at 9:16pm

science
I had to I an experiment where a balloon was tied to each end of a meter stick which was balanced on a pencil over two cans. I had to pop one balloon which caused the pencil, stick and other balloon to fall off the cans. I need to use particle theory to explain what happened ...
Wednesday, October 10, 2012 at 9:02pm

***PLEASE SCIENCE****
I have this question: Which is the smallest unit of measurement for temperature? One Celsius degree: one Kelvin:one Fahrenheit. I think it is Kelvin but I can't find anywhere in my book where it refers to that. When I google all three it says Celsius & Kelvin is the same. ...
Wednesday, October 10, 2012 at 8:09pm

Science
Why are aboriginal clan systems considered a human social system?
Wednesday, October 10, 2012 at 6:53pm

Science
What products is formed when zinc is added to dilute hydrochloric acid?
Wednesday, October 10, 2012 at 6:45pm

AP Environmental Science
Consider the following heats, copper: 0.384J/g degrees, glass:0.502J/g degrees, water: 4.18J/g degrees, and lead:0.159J/g. Which substance once warmed, would be more likely to maintain its heat and keep you warm through a long party on a cold night?
Wednesday, October 10, 2012 at 4:31pm

earth science
according to the condensation theory the most important factor for the formation of our planet was
Wednesday, October 10, 2012 at 1:09pm

earth science
Astonomers think planets formed from interstellar dust and gases that clumped together in a process called
Wednesday, October 10, 2012 at 11:43am

Science
In a constant-pressure calorimeter, 70.0 mL of 0.330 M Ba(OH)2 was added to 70.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.27 °C to 25.77 °C. If the solution has the same density and specific heat as water, what is ÄH ...
Wednesday, October 10, 2012 at 9:45am

science
An aircraft travels through the air with a velocity of 200m/s due east. It is found to be travelling over the ground with a velocity of 220m/s in a direction of 20(degree) south of east.The difference between the two is due to thw wind velocity. What is the wind velocity?
Wednesday, October 10, 2012 at 7:32am

I.T
What are some similarities between computer science and information technology?
Wednesday, October 10, 2012 at 6:21am

Political Science
What are the factors that keep an ideology alive? How does an ideology survive through decades? Is it because of the people, economic structure of a state or simply that once an ideological concept has been developed that it cannot truly disappear?
Wednesday, October 10, 2012 at 4:15am

Science
24.62 g of nickel heated and then immersed in 200ml of water. the temperature of the water rose 22.50c to 32.20c.The specific heat of NI is .470J/g*C. What is the temperature of the Ni before it is immersed in the water?
Wednesday, October 10, 2012 at 12:27am

Science
In the early 20th century, some scientists were reluctant to accept the conclusion that DNA could be the genetic material because it is so_________________.
Tuesday, October 9, 2012 at 11:01pm

Science
We have to build a catapult that can launch a marshmallow at least 10 feet. Can anyone give me any ideas?
Tuesday, October 9, 2012 at 10:28pm

Science
Are hydrogen bonds weak or strong?
Tuesday, October 9, 2012 at 10:13pm

Math
Movies A survey of 350 customers was taken at Regal Cinemas in Austin, Texas, regarding the type of movies customers liked. The following information was determined. 196 liked dramas. 153 liked comedies. 88 liked science fiction. 59 liked dramas and comedies. ...
Tuesday, October 9, 2012 at 9:45pm

Science 8R
What is matter? (I LOOKED in my textbook it's not there and plus I forgot what it was)
Tuesday, October 9, 2012 at 9:38pm

Science
I can't find this answer in my book but can someone tell me if its right please? When you remove electrons from a metal cup, the cup becomes: negatively charged - positively charged or ionized? I think it is negatively charged. Thanks
Tuesday, October 9, 2012 at 9:17pm

Science
What does sleep do for the body?
Tuesday, October 9, 2012 at 8:55pm

Science
Large deposits of salt get into lakes in Utah due to what?
Tuesday, October 9, 2012 at 8:54pm

Science
How do fruit seeds help fertilize plants and help them grow?
Tuesday, October 9, 2012 at 8:50pm

Science
a 25 kg object moving at 15 m/s collides with at 15 kg object that is standing still. They stick together and keep moving, what is their final velocity?
Tuesday, October 9, 2012 at 8:36pm

Science
If 1/10 of 1 percent of the population gets a flu vaccine what will the ratio of people treated be?
Tuesday, October 9, 2012 at 8:11pm

Science 8R - Volume Lab
I doing this lab for my science class about volume. In class today I collected my data. I measure the regular solid (LxWxH) and as for the irregular solid I use water displacement by putting the irregular solid (that is small) in the graduated cylinder full of water and you ...
Tuesday, October 9, 2012 at 8:04pm

Science 8R
How do you determine the volume of an irregular solid?
Tuesday, October 9, 2012 at 7:42pm

science fair
I need to do a project for the science fair but I don't know what to do. My science teacher says it has to be like the water dancing on a penny, everything has to be the same but you have to change one thing. What can I do?????? HELP ME PLEASE :/
Tuesday, October 9, 2012 at 7:08pm

6th grade science
I know how to do the expiriment but I need help with the essay this about the glass cup over the candle and it sucks water.this is what I've got"When you put a cup on top of a lit up candle warm air gets trapped under the glass. Once the glass cools it contracts, ...
Tuesday, October 9, 2012 at 6:57pm

Science
Q-How does room temp. affect student performance? H-If the amount of room temp. increase,then........ Q-question H-hypothesis
Tuesday, October 9, 2012 at 5:43pm

science
Is venus the 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th or 9th smallest planet?
Tuesday, October 9, 2012 at 4:53pm

For ms sue
i am doing this on my phone not computer plz do you any way to fix it. I am a member
Tuesday, October 9, 2012 at 4:48pm

Science
How many grams of ammonium nitrate is equivalent to 1 gram of calcium nitrate
Tuesday, October 9, 2012 at 4:46pm

something
I am doing it on my phone. It wont let me do it on my computer
Tuesday, October 9, 2012 at 4:42pm

science
Why does air move in the atmosphere/why is there wind?
Tuesday, October 9, 2012 at 4:35pm

science
What is the planet venus best known for?
Tuesday, October 9, 2012 at 4:22pm

science
Is venus the 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th or 9th smallest planet? Also is it the 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th or 9th largest planet?
Tuesday, October 9, 2012 at 4:19pm

science
A golfer tees off and hits a golf ball at a speed of 31 m/s and at an angle of 35 degrees. How far did the ball travel before hitting the ground? Round the answer to the nearest tenth of a meter.
Tuesday, October 9, 2012 at 3:17pm

bookkeeping
Using your computer, you create a file for an existing costumer. When you're finished, you should a. overwrite the existing file by giving the new file the same name. b. use Save as to save the new file under a different name c. coordinate the old and new files b giving ...
Tuesday, October 9, 2012 at 1:47pm

Science
What is the final pressure of the gas relative to its initial pressure when there is an increase in Kelvin temperature of a cylinder of compressed gas by a factor of 2.7?
Tuesday, October 9, 2012 at 1:39pm

Physical Science
How much heat in joules is needed to raise the temperature of 5.5 L of water from 0 degrees Celsius to 78 degrees Celsius?
Tuesday, October 9, 2012 at 1:27pm

Science
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 15.2 g of biphenyl in 29.5 g of benzene?
Tuesday, October 9, 2012 at 12:52pm

Physical Science
A strong magnet attracts a paper cup to itself with a certain force. Does the paper cup exert a force on the strong magnet?
Tuesday, October 9, 2012 at 11:13am

Science
Predict what would happen to the weather in the north-eastern united states if the polar jet stream dipped to the south. How would the weather change if the jet stream moved to the north?
Tuesday, October 9, 2012 at 8:16am

Bachelor in Science
If I takeB achelor in Science How many years it will take and what field it relates to?
Monday, October 8, 2012 at 6:57pm

principles of management
Imagine that you were the CEO of Apple computer. Recognizing the importance of developing strategies to adapt to environmental and economic uncertainty, what steps would you take to scan your business environment? Can you keep track of all aspects of the environment? If not ...
Monday, October 8, 2012 at 6:49pm

science
I dissolved two different white solids into water. One solid dissolved and gave off heat and the other became cold. Reading various texts online, I was not sure if these were physical or chemical changes. Some texts say if these solids are salts then these are physical changes...
Monday, October 8, 2012 at 5:33pm

science
A truck whose bed is 2.5m long, 1.5m wide,and 1m high delivering sand fro a sand-sculpture competition. How many trips must the truck make to deliver 7 cubic meters of sand?
Monday, October 8, 2012 at 4:14pm

science
why do plants cell have rigid cell walls while animals cells dont have
Monday, October 8, 2012 at 8:24am

Science
In black and white photography, a photon energy of about 4.00 x 10 to the negative 19th power I is needed to bring about the changes in the silver compounds used in the film. Explain why a red light used in a darkroom does not affect the film during developing.
Monday, October 8, 2012 at 2:14am

Science
How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?
Monday, October 8, 2012 at 2:03am

Science
How much time is required for reflected sunlight to travel from the Moon to Earth if the distance between Earth and the Moon is 3.85 x 10 to the 5th exponent?
Monday, October 8, 2012 at 1:58am

National Junior Honor Society - HELP!
Since I'm in the NJHS, last Wednesday was my first meeting. We discuss the expectations, blah blah blah. Then we also discuss leadership positions. Like President, Vice President, Secretary, Reporter, Treasurer, and Committee Chairpersons. In the packet is said "If ...
Sunday, October 7, 2012 at 10:57pm

Social science
Social conflict, empowerment theory and feminist theory. How are the theories similar? How are the theories different? What are the implications for interventions and community development?
Sunday, October 7, 2012 at 8:30pm

Computer studies
Draw a flowchart for a program that will accepts 30 intergers and print the number of positive and negatives numbers and the sum of the positive number
Sunday, October 7, 2012 at 8:24pm

science-physics
A swimmer, capable of swimming at a speed of 1.97 m/s in still water (i.e., the swimmer can swim with a speed of 1.97 m/s relative to the water), starts to swim directly across a 2.77-km-wide river. However, the current is 1.13 m/s, and it carries the swimmer downstream. (a) ...
Sunday, October 7, 2012 at 5:40pm

science- please check my work.
Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3), and acetic anhydride (C4H6O3): C7H6O3 + C4H6O3 ¨ C9H8O4 + HC2H3O2 How much salicylic acid is required to produce 2.0 102 kg of aspirin, assuming that all of the salicylic acid is converted to aspirin? for ...
Sunday, October 7, 2012 at 3:50pm

Science
Please list breeds of pigs found in the caribbean thank you.
Sunday, October 7, 2012 at 12:48pm

Computer (Programming with Python)
Problem 1: Multiplication Drill Computers can perform calculations extremely quickly and accurately, but it's often handy to calculate with the computers we carry around inside our heads. Write a program to drill you in multiplication tables. Your program should read a ...
Sunday, October 7, 2012 at 4:17am

science
Q10 A hunter aims his gun and fires a bullet directly at a monkey. At the instant the bullet is fired, the monkey drops. The minimum speed for the bullet to hit monkey is
Sunday, October 7, 2012 at 12:49am

science
a star has a size of 0.1 solar radius. How many times larger is the sun than this star
Saturday, October 6, 2012 at 9:50pm

science
what are some physical properties of stars
Saturday, October 6, 2012 at 9:40pm

Social science
What are the implications for interventions and community development?
Saturday, October 6, 2012 at 9:35pm

physical science
An object which is 0.52m tall is located 1.13m in front of a plane mirror. How tall is the image as seen in the mirror?
Saturday, October 6, 2012 at 5:01pm

science
Explain why the temperature of water might increase when a solution forms.
Saturday, October 6, 2012 at 11:54am

science
What happens when you burn magnesium metal using the big idea of energy?
Saturday, October 6, 2012 at 8:53am

science
Hi, create one of the following weather instrument:we would like anemometer.please tell me which one is the best
Friday, October 5, 2012 at 10:57pm

science
determine the period of motion when a ball dropped from a height of 4.40m makes a perfectly elastic collsion with the ground without any mechanical energy lost
Friday, October 5, 2012 at 10:53pm

science
please tell me if you agree with the following: Which Brand of popcorn hs the least amount of unpooped kernels after 3 minutes. Brand 1 has 1 Brand 2 has 15 Brand 3 has 16 Brand 4 has 5 Brand 5 has 25 the answer is Brand 1 BUT is the: independent variable the different brands ...
Friday, October 5, 2012 at 7:29pm

science
what is the control in the following experiment - which brand of popcorn has the least amount of un-popped kernels after 3 minutes?
Friday, October 5, 2012 at 7:18pm

Science-Biology
why do plants grow better under certain lighting conditions than others?
Friday, October 5, 2012 at 5:36pm

Science
How does the inner core differ from the outer core?
Friday, October 5, 2012 at 5:33pm

science
a puppy runs a distance of 20m to its mother ina time 5s.what is the puppy's speed?
Friday, October 5, 2012 at 3:20pm

math
A certain computer can perform 105 calculations per second. How many calculations can it perform in 10 seconds?
Friday, October 5, 2012 at 9:22am

science
A prisoner that is funny would be what periodic table element?
Friday, October 5, 2012 at 2:38am

Advanced physical science
An astronaut drops a golf ball to the surface of the moon from a height of 1.5m. The golf ball has a velocity of 2.24 m/s right before it lands on the moon (assume this height to be zero). What is acceleration due to gravity on the moon?
Thursday, October 4, 2012 at 11:20pm

Advanced physical science
At the top of the Washington monument, a bird drops an acorn into the reflecting pool 169m below. If the acorn has a massof 1.0 kg, with what velocity would it hit the water?
Thursday, October 4, 2012 at 11:17pm

Advanced physical science
A fiery ball of wood is loaded into a medieval catapult to be thrown into a castle. Unfortunately, the attacking heathens are not very smart and since geometry and physics were not studied in their time, they launched the ball straight up into the air. The catapult launcher ...
Thursday, October 4, 2012 at 11:13pm

Science
An elevator lifts a person weighing 625 newtons a distance of 7 meters. If the elevator uses 875 watts of power to lift the person, how long does it take?
Thursday, October 4, 2012 at 10:28pm

science
for many years pellagra was believed to be an infectious disease promoted by unsanitary conditions. it was common in sanatoriums and orphanages but only among the patients and not the staff. a study of the diets showed that suffers of pellagra rarely ate high quality proteins...
Thursday, October 4, 2012 at 10:27pm

physical science
A Weather balloon carries instruments that measure temperature, pressure, and humidity as it rises through the atmosphere. Suppose such a balloon has a volume of 1.2 m3 at sea level where the pressure is 1 atm and the temperature is 20oC. When the balloon is at an altitude of ...
Thursday, October 4, 2012 at 8:44pm

Science
1. Do you think there is very much practical chemistry in today's world? Can you give any examples? 2. When you use different materials, what are they most likely to be made from: Elements, compounds, or mixtures? Which of the three is most rare. please help... I dont get ...
Thursday, October 4, 2012 at 8:06pm

science
On Earth, the ratio of the force (newtons) to the mass (kilograms) of an object is always the same
Thursday, October 4, 2012 at 6:52pm

Science
How was the process of natural selection helped to produce organisms which possess specific adaptations to help them survive in their environment?
Thursday, October 4, 2012 at 6:36pm

general science
a 210 Newton force is applied to a piston, the force produced is 320 kPa of pressure, what's the area of the piston?
Thursday, October 4, 2012 at 1:49pm

Science
A fire breaks out and increases the Kelvin temperature of a cylinder of compressed gas by a factor of 1.4. What is the final pressure of the gas relative to its initial pressure?
Thursday, October 4, 2012 at 12:50pm

Earth Science
Renewable resources can be replaced as fast as they are consumed? It is true or false?
Thursday, October 4, 2012 at 12:49pm

science
A quantity of steam (200 g) at 126°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?
Thursday, October 4, 2012 at 12:39pm

science
how has the process of natural selection helped to produce organisms which posses specific adaptions to help them survive in their environment?
Thursday, October 4, 2012 at 12:29pm

science
i have a work sheet to do it gives me the atomic number and the mass number of elements i have to fill in the missing electrons protons neutrons
Thursday, October 4, 2012 at 11:34am

physical science
How do we add forces that act at an angle?
Thursday, October 4, 2012 at 11:20am

Physics 1
The hard disk in a laptop computer contains a small disk that rotates at a rate of 5000 rpm. If this disk has a radius of 2.3 cm, what is the centripetal acceleration of a point at the edge of the disk?_____m/s^2
Thursday, October 4, 2012 at 11:18am

world civilization
what was the relationship between politics and science in the early modern world?
Thursday, October 4, 2012 at 8:24am

Computer Science
Where can I find college grants and scholarships for men 2 deviations below standard in height?
Thursday, October 4, 2012 at 3:51am

science
Your airplane just ran out of gas. Your plane is falling at a velocity of 80m/sec down. At that velocity, how long will it take your airplane to reach the ground?
Thursday, October 4, 2012 at 3:40am

Science
What is the molarity of a solution prepared by dissolving 60 gm of Glucose in 500 gm of water
Thursday, October 4, 2012 at 2:23am

Science
(1)Suppose a lava flow was found between two sedimentary rock layers. How could you use the lava flow to learn about the ages of the sedimentary rock layers?
Wednesday, October 3, 2012 at 11:28pm

science
Sediment can be directly turned into which of these types of rock? Select all that apply. A. igneous B. sedimentary C. metamorphic i think its all of them correct?
Wednesday, October 3, 2012 at 10:15pm

science
how does a change in wavelength affect the speed of a photon.
Wednesday, October 3, 2012 at 9:44pm

science
how many days would it take to fly to Jupiter (from Earth) in a space shuttle at 45,000 miles per hour? The minimum distance between the Earth and Jupiter is 365 million miles.
Wednesday, October 3, 2012 at 9:44pm

science
how many days would it take to drive from the earth to the moon at a speed of 75 miles per hour? the average distance from the earth to the moon is 380,000km. 1 km=0.62 miles
Wednesday, October 3, 2012 at 9:42pm

science
What is the relationship between a mineral and a rock? A.They are the exact same thing. B.A mineral is a building block of rocks. C.Minerals are only silicates while rocks are nonsilicates. D.A rock is always man-made while a mineral is naturally occurring. I think the answer...
Wednesday, October 3, 2012 at 8:39pm

7th grade math - can't figure this out!
A certain computer can perform 10^5 calculations per second. How many calculations can it perform in 10 seconds? I just cannot seem to solve this problem can somebody explain how to do this step by step?
Wednesday, October 3, 2012 at 8:11pm

Science
What is the basic unit for volume?
Wednesday, October 3, 2012 at 7:07pm

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