Saturday
May 18, 2013

# Homework Help: Science

Branches of Science

math
It certainly pays to check your work! I just took a HUGE science test. I checked it over twice before I turned it in, and got an A! My score was 94 out of 100! I figure that each time I checked it, I found half of the mistakes that were there at the time. What would my score ...
Monday, May 21, 2012 at 7:36pm

science
Hello. Please, help me do this. I would be really thankful! Find the mass of triacetate, which you can get from 1.62 ton of wood waste. The yield of process is 75% and there are 50% of cellulose in wood.
Monday, May 21, 2012 at 9:01am

SCIENCE
WHAT IS THE FUNCTION OF GUARD CELLS?
Sunday, May 20, 2012 at 4:06pm

Science
Sunday, May 20, 2012 at 3:38pm

Science
Where can we see the result of plate movement?
Sunday, May 20, 2012 at 3:22pm

Science
why does a 5p sink but a heavier piece of wood floats?
Sunday, May 20, 2012 at 8:06am

political science
Both California State Senators and US Senators are elected to six year terms.? true or false?
Saturday, May 19, 2012 at 10:37pm

the purpose of including a control in an experiment is to provide_______. can someone please help me solve what the blank/____ is???
Saturday, May 19, 2012 at 9:56pm

science
John folded a wet washcloth in four. Mary spreads hers out. Which washcloth dried the quickest???And please explain.
Saturday, May 19, 2012 at 9:19pm

science
in shell and tube type of condenser, the flue gas mixture of acetaldehyde,oxygen and nitrogen at 17391.17Kg/hr enters to the condenser at 75 degree celcius and leaves at 20 degree celcius,while the cooling water enters at 17 degree celcius and leaves at 37 degree celcius....
Friday, May 18, 2012 at 2:38pm

science (physics)
A chairlift carries skiers to the top of a ski hill. If the chairlift does 180 kJ of work in 15s, what is the power of the chairlift?
Friday, May 18, 2012 at 12:50pm

Science
Ethene gas (C2Ha) reacts with oxygen to form carbon monoxide and water. Write a balanced equation for this reaction, then find the mole ratios of substances on each side of the equation.
Friday, May 18, 2012 at 11:24am

Computer Science
Design a program that will ask the user to enter the amount of a purchase. The program should the compute the state and county sales tax. Assume the state sales tax is 4 percent and the county sales tax is 2 percent. The program should display the amount of the purchase, the ...
Thursday, May 17, 2012 at 9:28pm

science review
since tomorrow is my test. Please check: seed coat- skin covering the seed to protect the inner parts Hilum- ? cotyledon- where nutritient is stored inside the seed embryo- part of a seed that grows into a plant. it include roots, leaves, and stem?
Thursday, May 17, 2012 at 9:01pm

science
a passenger in a ferris wheel rates 3m/s in a vertical circle of radius 5m. find the apparent the ratio of his apparent weight to his true weight at the top and bottom of the circle
Thursday, May 17, 2012 at 1:54pm

science
a u-tube is partially filled with water.oil which does not mix with water is next poured into one side until water rises by 2.5cm on the other side.if the density of oil be 0.8 ,the oil level will stand higher than the water level by how much?
Thursday, May 17, 2012 at 4:27am

science
the janitor exerted 80 newtons of forse to push the meter-long hall against the forse of friction. then he lifted the box weighing 220 newtons onto the second shelf, which was 1 meter off the floor. How much work did the janitor do?
Wednesday, May 16, 2012 at 7:02pm

Enviro Science
4. Which of the following issues hinders efforts to achieve sustainability? a. who will solve environmental problems b. who is responsible for environmental problems c. who pays the costs of implementing solutions d. all of the above D 8. Which of the following factors does ...
Wednesday, May 16, 2012 at 1:19pm

Enviro Science
4. Which of the following issues hinders efforts to achieve sustainability? a. who will solve environmental problems b. who is responsible for environmental problems c. who pays the costs of implementing solutions d. all of the above D 8. Which of the following factors does ...
Tuesday, May 15, 2012 at 8:29pm

Science
1. An electric space heater draws 15.0 A from a 120 V source. It is operated, on average, for 5.0h (hours) each day. a) How much power does the heater use and b) At \$.10 per kWh, what does it cost to operate the heater for 30 days? 2. Suppose each person in the United States ...
Tuesday, May 15, 2012 at 7:09pm

science
how does the moon move through space ?
Tuesday, May 15, 2012 at 6:04pm

Science 7R - Question
What is platelets??? My teacher mention it in class just that I forgot and I want to include it in my notes for me to study for the test. Please no big definition with big words.
Tuesday, May 15, 2012 at 5:21pm

Science 7R
Tomorrow I have a science test on circulatory system and is there a practice test THAT IS ON 7TH GRADE SCIENCE REGENTS LEVEL!?!? please i really want to do well on the test if take a pre-test thanks ;) btw --- i'm going over my notes for the test just that i want to take a...
Tuesday, May 15, 2012 at 5:20pm

science
A monkey that weighs 270 newtons is hanging from a branch of a tree. What is the size and direction of the mobkeys force on the tree branch ? why? explain?
Tuesday, May 15, 2012 at 5:13pm

science
can one of you little monsters help me by answer my question that i am just dying to ask!!! Here is the question little monsters: List all the colors of visible light.( WATCH OUT LITTLE MONSTERS: Note that there are 7 colors)
Tuesday, May 15, 2012 at 4:35pm

science
Mount Everest stands at 8,850 meters high. Every year it grows 1cm. How many meters high will this mountain be in 50,000 years
Tuesday, May 15, 2012 at 3:15pm

science
When a Gila monster uses a rock for shade from the noonday sun, it is interacting with _____. (1 point) an abiotic factor another organism an ecosystem its community
Tuesday, May 15, 2012 at 11:18am

earth science
A different side of the moon faces the earth at different times of the month. True or false?
Tuesday, May 15, 2012 at 11:05am

science
how does the moon move through space ?
Tuesday, May 15, 2012 at 8:54am

science
commercially available boric acid is in the form of salt.i want to know how to prepare a boric acid solution from boric acid salt?
Tuesday, May 15, 2012 at 6:01am

Science 7R - HELP!
Active in blood clot formation?
Monday, May 14, 2012 at 9:25pm

Science
How do plants reproduce?
Monday, May 14, 2012 at 8:50pm

science
If you watch a movie scene in which a loud explosion occurs in the space. What do you conclude about the accuracy of the scene?
Monday, May 14, 2012 at 8:03pm

Science 7R - HW Check (plzzz read!)
Directions - Match each phrase with the correct term from the list of Key Science Words. 1. filters microorganisms Answer - capillary Am I correct plzzzz hurry I have a school's concert 2nite.
Monday, May 14, 2012 at 4:47pm

Science
I have 5 minute presentation on any thing. I like talk about space travel or space exploration. I do not know where to find and other websites they have too much informtion. can you please give me any websites?
Monday, May 14, 2012 at 3:15pm

Science
Eight bricks 6 cm thick with mass 1.5kg lie flat on a table.how much work is required to top them one on another?
Monday, May 14, 2012 at 2:37pm

Enviro Science
20.People are exposed to pollutants on a daily basis in the a. food they eat b. air they breathe c. water they drink d. all of the above D 24. the 5 major pollutants to both the environment and human health are pesticides, lead, particulate matter, coal dust, and bacteria in ...
Monday, May 14, 2012 at 12:52pm

Science
What is the nostril
Monday, May 14, 2012 at 8:18am

Science
A boy exerts a force of 15N to push a motor bike which has flat tyre for a distance at 30m.calculate the mass of the motor bike. Calculate the density of the motor bike.calculate the work done by the boy.[take g=10m|sm2
Monday, May 14, 2012 at 3:38am

Science
A boy exerts a force of 15N to push a motor bike which has flat tyre for a distance at 30m.calculate the mass of the motor bike. Calculate the density of the motor bike.calculate the work done by the boy.[take g=10m|sm2
Monday, May 14, 2012 at 3:36am

science
convert 25 liter into SI unit
Monday, May 14, 2012 at 2:07am

Science
What is a galaxy with no definite shape or size called?
Sunday, May 13, 2012 at 10:41pm

science
if i use 30 ul from a total volume of 600ul to get 40ug/ml. So to get the total ug only, do i take 40ug/ml*.030ml*(600ul/30ul)=total ug
Saturday, May 12, 2012 at 9:26pm

Information Literacy
1-To determine the best place to begin your online research, you should first A. identify keywords and search terms. B. formulate your research question. C. choose several verbs and modifiers to help define your search. D. settle on a single, concise search term or phrase. My ...
Saturday, May 12, 2012 at 7:20pm

A lamp connected to a battery lights up. If a second, identical lamp is connected to the battery in parallel, the current drawn from the battery will _____ , and compared to the original brightness of the first lamp, both lamps will be _____ . will the current increase and ...
Saturday, May 12, 2012 at 4:52pm

Science!
Always forms virtual images at the same distance behind the optic as the object is in front of it. I thought it was concave but im not sure if concave lens form a virtual images when its infront of the optic
Saturday, May 12, 2012 at 11:10am

science-biology
can anyone help me by finding which enzymes are present in carbohydrates? is it salivary amylase(tyalin)
Saturday, May 12, 2012 at 1:39am

science
if i use 30 ul from a total volume of 600ul to get 40ug/ml. So to get the total ug only, do i take 40ug/ml*.030ml*(600ul/30ul)=total ug
Saturday, May 12, 2012 at 1:37am

Science
Table salt has a solubility of 36 g of salt in 100 g of water at 40°C. If 15 g of the salt are added to 50 g of water at the same temperature, is the resulting solution saturated or unsaturated? Explain your answer
Friday, May 11, 2012 at 4:06pm

science
Explain the concepts of phyletic gradualism and punctuated equilibrium. What predictions about the fossil record does punctuated equilibrium make? In this model, what are the processes that produce rapid evolution? Which evolutionary factors are responsible for the periods of ...
Friday, May 11, 2012 at 2:28pm

science
How many moles of oxygen in a litre of air which has 21% oxygen by volume?
Friday, May 11, 2012 at 6:22am

writing
find information about a hurricane that occurred within the last week? A newspaper science journal science magazine encyclopedia
Thursday, May 10, 2012 at 12:31pm

computer science
Promotion time is coming around the corner. In the last board meeting, your supervisor has asked someone to create a list of tables for a Fernandos Skate Shop customer orders. Use the following preliminary field list and list of subjects to get started. Realize that the lists ...
Thursday, May 10, 2012 at 11:42am

Science
1) A block of mass 0.5 kg is placed at the highest point of a fixed smooth sphere of radius 0.5m. The block is gently pushed to one side. Calculate: 0 the 3 o (1) force exerted by the block on the sphere when it makes an angle with the vertical. (ii) At what angle does it ...
Thursday, May 10, 2012 at 10:46am

science
sugar concentration os 10g/100ml given a teaspoon weighs 4 g calculate how many teaspoons of sugar you would consume if you drank a 600ml bottle of soft drink
Thursday, May 10, 2012 at 10:10am

Science
By how much does the total partition function (excluding electronic) increase when 20 m^3 of Neon at 1.00 atm and 300 K is allowed to expand by 0.0010% at constant temperature?
Thursday, May 10, 2012 at 12:47am

NATURAL SCIENCE
Does a train traveling at 20 mph on a curved track have a constant velocity?
Wednesday, May 9, 2012 at 10:46pm

Science 7R - Hw Qs. Check (plzzzz read!!!!)
1. Arteries branching away from the heart become Answer -larger and larger? am I correct?
Wednesday, May 9, 2012 at 8:59pm

Science 7R - Hw Qs. Check Q2 (plzzzz read!!!!)
2. Veins leading back in the heart become Answer - smaller and smaller? am i correct?
Wednesday, May 9, 2012 at 8:58pm

Science 7R - Hw Qs. Check Q3 (plzzzz read!!!!)
3. Most of our blood vessels are Answer - capillaries? am i correct?
Wednesday, May 9, 2012 at 8:58pm

Science 7R - Hw Qs. Help!!!!!!! (plzzzz read!!!!)
Word Scramble 1. UCATLOCNIRI _____________________ 2. NIVE VEIN 3. ILYCARLAP _______________________ 4. THERTA HEART 5. RATYER ____________________ I'm having trouble with three of them. Please Help!!!!!
Wednesday, May 9, 2012 at 8:58pm

science
A room has large windows without curtains. The sunlight makes the room bright, but no one can see in. Is the glass opaque, translucent, or transparent?
Wednesday, May 9, 2012 at 5:34pm

Science
Do homologous structures have the same function in different organisms?
Wednesday, May 9, 2012 at 5:27pm

science
Please help. Concentrated hydrochloric acid is a 38% w/w solution of HCL in water and has a density of 1.18g/ml. How many millilitres of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 w/v HCL solution? My answer is 2.12ml. I'm not sure if its correct...
Wednesday, May 9, 2012 at 4:02pm

Science
If 5.6 mol of CuCl2 reacts with 10.2 mol of NaNo3, what is the limiting reagent?
Wednesday, May 9, 2012 at 3:58pm

Earht Science
To bobpursley, the half life is 40.(potassium 40)
Wednesday, May 9, 2012 at 1:25pm

science
During the shot put competition at a track and field meet, a shot putter transfers 245J of energy to a 7200g steel ball he is throwing. What is the velocity of the ball?
Wednesday, May 9, 2012 at 12:28pm

Physical Science
What is a nine letter word for the size of a measurement.. and the last letter of the word ends in "E".. Thanks, Priscilla
Wednesday, May 9, 2012 at 11:15am

Earth Science
How long will it take for Potassium to have a 25% of oringinal radioactive product left?
Wednesday, May 9, 2012 at 9:35am

Science
An astronaut is walking in space and his jetpack runs out of fuel. How can he use his empty pack to get back to the space station?
Tuesday, May 8, 2012 at 8:19pm

Science 7R - Help!!!!
2. Explain the pathway of blood through the heart. Answer - The blood begins its journey through arteries, capillaries, and veins. I need a bit more details (about 2 more sentences), please help
Tuesday, May 8, 2012 at 7:32pm

English
In "The Second Coming," what is Yeats' prophecy for modern civilization? a. World War II will kill millions of civilians and soldiers b. The United States will become the dominant world power c. Western civilization will enter a period of decline d. Science will ...
Tuesday, May 8, 2012 at 3:56pm

science(physics)
what is the distinction between magnitude of displacement over an interval of time and the total length of path covered by a particle over the same interval
Tuesday, May 8, 2012 at 2:08pm

Science
Will water in a pipe be the same level at both ends if one end of the pipe is 1 foot higher than the other end?
Tuesday, May 8, 2012 at 11:14am

science
A hockey puck moving at 28 m/s is caught by an 80.00 kg man who was at rest. The man and puck move together after the collision. The puck's mass is 0.16 kg. What is the final velocity?
Tuesday, May 8, 2012 at 9:31am

science, chemistry
2Al(s)+ 3Cl2(g)=2AlCl3(s) For the above reaction calculate: A) delta H, then state whether the reaction is endothermic or exothermic B) delta s, then whether the reaction becomes more or less disorder. C) delta G, the state whether the reaction is spontaneous or non-spontaneous
Monday, May 7, 2012 at 8:52pm

Science 7R - HW Qs. Help!!! (Q3)
19. What things can you do now to help prevent bone fractures when you're older? I really need help in this question. Please Help!!!!
Monday, May 7, 2012 at 8:32pm

physical science
To what Celsius temperature must a gas sample initially at 20 degrees Celsius be heated if its volume is to double while the pressure remains the same?
Monday, May 7, 2012 at 8:24pm

Science 7R - HW Qs. Help!!!! (Q2)
How do you know that bone is a living material? My Answer (and think) - it contains cells I need a bit help on this qs. My teacher won't accepted this so I have to add more details.
Monday, May 7, 2012 at 8:05pm

Science 7R - HW Qs. Help!!!
17. Itis is the suffix that means swelling. What do you think tendonitis means? Would you expect tendonitis to be painful? Why? My Answer - ?????????????? What does tendonitis means? I'm having a but trouble in this question. Please Help!
Monday, May 7, 2012 at 7:45pm

Science 7R - HW Qs. Check!
16. Coaches advise athletes to warm up or exercise a few minutes before beginning a sports activity. Explain why warming up is important. My Answer - Warming up helps reduce our risk of injury and the aches and pains that come with exercise. It also prepares your muscles for ...
Monday, May 7, 2012 at 7:39pm

Science 7R - HW Qs. Check
14. Which muscle is responsible for bending the elbow joint? a) masseter b) trapezius (it can't be this answer cuz that's is the back) c) triceps d) biceps My Answer (and also think) - C am i correct????
Monday, May 7, 2012 at 6:52pm

science
what causes grains of sand to stick together
Monday, May 7, 2012 at 3:29pm

Science
Based on your knowledge of the relationship between photosynthesis and CO2, explain why CO2 concentrations cycle throughout the year.
Monday, May 7, 2012 at 3:04pm

Science
If you have a 12M container of HCl avaliable. How much of this solution is needed to make up a 5.0L solution of 0.10M concentration?
Monday, May 7, 2012 at 11:50am

Science
If you have a 500 mL of a 0.4M Nacl solution. How much water is needed to make is 0.1M solution?
Monday, May 7, 2012 at 11:48am

science
What plants live in the Serengeti Ecosystem?
Sunday, May 6, 2012 at 11:41pm

Topics in Physical Science
Find the net electrostatic in N or Q2 due to Q1 + Q2
Sunday, May 6, 2012 at 8:34pm

Science
Two similar ballon are filled with gas. One with hydrogen and the other with oxygen. Which one will go down first and why?
Sunday, May 6, 2012 at 11:41am

Physical Science
On a hot summer day (30 degrees Celcius), a pesky little mosquito produced its warning sound near your ear. The sound is produced by the beating of its wings at a rate of about 600 wing beats per second. What is the frequency in Hertz of the sound wave? What is the wavelength ...
Sunday, May 6, 2012 at 10:20am

science
a metallic cube of mass M and dencity D is kept on a table .find the pressure on table.
Saturday, May 5, 2012 at 9:00am

Psychology
Please check my answers and let me know if they are right or wrong. 1. Behaviorism as a means of studying the mind emerged due to the limitations of Introspection. Behaviorists examine: >subjective behavior. >covert behavior. >overt behavior.x (My Choice) >...
Friday, May 4, 2012 at 10:01pm

physical science
a 30 kg girl and a 25 kg boy face each other on friction-free roller blades.the girl pushes the boy,who moves away at a speed of 1.0 m/s.the girl,s speed is _ m/s.
Friday, May 4, 2012 at 7:28pm

physical science
a 30 kg girl and a 25 kg boy face each other on friction-free roller blades.the girl pushes the boy,who moves away at a speed of 1.0 m/s.the girl,s speed is _ m/s.
Friday, May 4, 2012 at 7:13pm

How did earthquakes contribute to the destruction of over seventy villages in Tibet? What does a concave scar on a hillside reveal about the formation of the landscape? How can erosion form new land? Please help me. I don't have any answers and I really need help. Thank ...
Friday, May 4, 2012 at 4:22pm

bio
Would you agree that it is valuable for a nation to have a citizenry that is reasonably well versed in science? Give reasons for your answer. Would you say this need has become especially urgent in the last two decades? Why or why not? Evaluate
Friday, May 4, 2012 at 3:07pm

science
a 110 kg person dives off a cliff and hits the water at 17 m/s. how high is the cliff?
Friday, May 4, 2012 at 10:19am

science
If the mass of solute 9.0 and the volume of solution is 250 mL, what is the solute's percent?
Friday, May 4, 2012 at 12:44am

science
If the mass of solute 9.0 and the volume of solution is 250 mL, what is the solute's percent?
Friday, May 4, 2012 at 12:16am

Science
Living organisms animals
Thursday, May 3, 2012 at 5:07pm

physical science
a skydiver steps from a helicopter and falls for 5 seconds before reaching her terminal velocity.during this 5 second interval, her acceleration;
Thursday, May 3, 2012 at 4:43pm

science
Draw a free body diagram to show the relationship of forces on a 200 kg boulder resting on a 15degree incline. Include the magnitude of the force applied by an aadvark as it holds the boulder in place.
Thursday, May 3, 2012 at 4:34pm

Science
A simple machine with a wedge at one end, an inclined plane wrapped around an axle in the middle, and a wheel at the other end is a -----?
Wednesday, May 2, 2012 at 10:37pm

Science
A simple machine with a wedge at one end, an inclined plane wrapped around an axle in the middle, and a wheel at the other end is a -----?
Wednesday, May 2, 2012 at 10:37pm

science
what makes up a watershed
Wednesday, May 2, 2012 at 10:30pm

Earth & Space Science
Could someone please tell me what do you do in this class. I'm going to be a senior next year [High School] , & thinking of taking this class. And also if someone could tell me where to find notes for that class. THANK YOU!
Wednesday, May 2, 2012 at 9:43pm

science
what principle would you be applying if you found a hair on a filing cabinet
Wednesday, May 2, 2012 at 8:55pm

science
Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 136 mL of solution.
Wednesday, May 2, 2012 at 7:13pm

Science
A vaccine can protect you against a disease because it (1)destroys toxic substances from bacteria before they can make you sick\ (2) stimulates your immune system against the pathogens (3) kills any pathogenic bacteria in your body (4) changes pathogenic bacteria into harmless...
Wednesday, May 2, 2012 at 5:37pm

Science
Who and when was the electric light bulb invented? 1879 by Thomas Edison
Wednesday, May 2, 2012 at 5:23pm

science
How do you think objects will fall when there is no air
Wednesday, May 2, 2012 at 3:52pm

decision science
The university computer lab has 10 computers which are constantly being used by students. Users need help from the one lab assistant fairly often. Students ask for help at a Poisson rate of an average of 4 requests per hour for any one computer. the assistant answers questions...
Wednesday, May 2, 2012 at 12:49pm

science
Suppose you drop a ball into the ocean in a place where there is no current. Will waves move the ball quickly away, or will it bob in place? Explain.
Tuesday, May 1, 2012 at 7:57pm

Science
Help / Research with my science fair project ? what type of music best stimulates plant growth,classical or pop music ?
Tuesday, May 1, 2012 at 6:30pm

Science
What are 2 disadvantages and advantages of a free range or extensive system?
Tuesday, May 1, 2012 at 5:33pm

Science
Really need help with my science homework Name and briefly define each of the three energy roles organisms can play in an ecosystem. Thank You
Tuesday, May 1, 2012 at 4:16pm

science
A 20 N object displaces 2,000 mL of water. What is the buoyancy? Hint: 1 mL of water = 1 cm3 of water = 1 g of water (Remember to convert g to kg) Will it float? (yes/no)
Tuesday, May 1, 2012 at 3:42pm

science
how might a blockage of the lymph vessels affect the function of the cardivascular system?
Tuesday, May 1, 2012 at 3:30pm

Science
Why do all goldfinches have some yellow feathers? A. Goldfinches change their feather color to fit their habitat B. Goldfinches inherit their feather color from their parents C. Goldfinches learn their feather color from other goldfinches
Monday, April 30, 2012 at 8:23pm

Science
Jessica and David spotted birds at the neighborhood park where they had a bird feeder set up. Why are the birds a consumer in this habitat? A. They are eaten by other animals B. They need food to survive C. The birds make food of their own
Monday, April 30, 2012 at 8:19pm

Science
One example of a tissue is- A.heart B.nucleus C.muscle D.mitochondria C?
Monday, April 30, 2012 at 5:29pm

Science
What is the function of a cell's nucleus? cell reproduction?
Monday, April 30, 2012 at 5:09pm

phi 103
strongly supported claim in science should be regarded as?
Monday, April 30, 2012 at 4:22pm

science
how is the Maunder minimum and the little ice age related events?
Monday, April 30, 2012 at 12:18pm

Science
Vanessa pushes a box with 50 N of force. The box accelerates 2 m/s2 for 10 seconds. What is the mass of the box?
Sunday, April 29, 2012 at 10:51pm

Enviro Science
2. The water resources of Earth are located in a. salt water found in the ocean b. freshwater found in icecaps and glaciers c. fresh water found in rivers, lakes, and streams d. all of the above C 4. Weather is the state of the atmosphere at a moment in time and at any ...
Sunday, April 29, 2012 at 8:45pm

Computer science
A. Given a = 5, b = 1, x = 10, and y = 5, create a program that outputs the result of the formula f = (a b)(x y) using a single printf() function. B. Create a program that uses the same formula above to output the result; this time, however, prompt the user for the values a, b...
Sunday, April 29, 2012 at 6:34pm

science
how can concentration of Cl- in mixture of two chlorides be calculated given concentration of the chlorides
Sunday, April 29, 2012 at 4:49pm

Science
A diver standing on the diving board has a mass of 89.0 kg and has a gravitational potential energy of 2.50 x 103 J. Determine how high the diver is above the water surface. (Assume the water is at ground level).Use 9.81 m/s2 as the value for gravity.
Sunday, April 29, 2012 at 4:38pm

science-chemistry
a bicycle tire that has a volume of 0.85L is inflated to 140 pounds per square inch. What will be the pressure in the tire if the number of moles of gas is doubled?
Sunday, April 29, 2012 at 3:46pm

Science-Chemistry
1.)A sample of oxygen took 55 seconds to travel a certain distance. How long would it take for the same number of moles of nitrogen to travel the same distance. 2.) A sample of hydrogen gas traveled 45m in a given amount of time. An unknown gas traveled 7.6m in the same amount...
Sunday, April 29, 2012 at 3:36pm

science-chemistry
please anwser soon, a rigid 4.10L flask contains a mixture of 1.25 moles of H2, 0.250 mole of O2, and sufficient Ar so that the partial pressure of Ar in the flask is 1.00 atm. The temperature is 63.5 degrees C A) Calculate the total pressure in the flask B) calculate the mole...
Sunday, April 29, 2012 at 3:34pm

Discrete Mathematics (computer science)
Find a formula for the nth term of the recurrence K(n) = 13.5K(n – 1) – 2.7 with K(0) = 5.
Sunday, April 29, 2012 at 3:25pm

science
write a skeleton equation for this reaction hydrogen iodide(g)->hydrogen+iodide(G)
Sunday, April 29, 2012 at 12:37pm

Desktop publishing-Elements of Design
Well i took this test and failed. This is the last test and i graduate. I posted [my answers] to the ones i think are right. 1. Study the following sentence, then select the answer that best describes it. THE COW JUMPS OVER THE MOON! A. Italic serifed type B. Bold roman sans ...
Sunday, April 29, 2012 at 11:41am

Maths and science
How drug addiction is a human factor that causes ill health, accidents crises or disasters
Sunday, April 29, 2012 at 11:23am

science
an empty density bottle weighs 25 gram. when completely filled with water, it weighs 55 gram and when completely filled with a liquid, it weighs 52 gram. calculate volume and density of the bottle.
Sunday, April 29, 2012 at 11:23am

FACS Project - POSTERS - Food Safety & Kitchen Saf
I have a project for my Family and Consumer Science class. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~​~~~~~~~~~~~~~~` Directions - Create two (2) posters, one for Food Safety and one for Kitchen Safety. Write a slogan that will express a Food Safety practice and Kitchen ...
Saturday, April 28, 2012 at 4:37pm

basic science
if a force of 140 neaten is applied by a car over a distance of 10 metre within 10 second, calculate. (i) work done by the car. (ii) power of the car.
Saturday, April 28, 2012 at 4:30pm

Science
How can the parent rock or bedrock effect the environment?
Saturday, April 28, 2012 at 5:28am

computer science
XYZ Corporation employs 40,00 people with their own associated IP addresses, and operates over 400 servers, including e-mail (SMTP and POP3), FTP, Web, and DHCP at two locations: one in Muncie, Indiana, the other about 20 miles away in Hartford City. Dual T1 lines, for total ...
Friday, April 27, 2012 at 11:01pm

physical science
two tuning fork are struck at the same time. one tuning fork has a frequency of20 hz while the second tuning fork has frequency of 226 hz. how beats will result?
Friday, April 27, 2012 at 7:56pm

science
A relative density bottle has a mass of 40g when empty, 90g when filled with water and 80g when filled with oil. Calculate the relative density of the oil.
Friday, April 27, 2012 at 4:37pm

Science
I have a few questions if someone could please help with them: Which of the following is true: A.Relative dating tells us how long ago something existed B.Disconformities are less common but usually far more conspicuous because the strata on either side are essentially C....
Friday, April 27, 2012 at 3:20pm

Science
what does it mean that nitrogen is a limiting nutrient in many marine ecosystems?
Friday, April 27, 2012 at 7:18am

science
Create a 12- to 15 slide Microsoft® PowerPoint® presentation for your chosen geologic feature.
Friday, April 27, 2012 at 6:12am

Science
Should humans strive to preserve a representative sample of all biomes or aquatic zones? Why should humans be concerned with the extinction rate?
Thursday, April 26, 2012 at 10:35pm

science..chemistry
given the solubility product;Ksp,of calcium hydroxide is 0.0000064M,caculate its solubility at this temperature in i.water ii.0.1M calciumchloride solution
Thursday, April 26, 2012 at 7:06pm

science fair
I need a science fir project!! I looked on a thousand of websites online but they give no interesting idea. I am in 6th grade and i need something at a 6 grade level that is easy a science fair project that is do in 1 week. i am in 6 grade and i don't need experiments ...
Thursday, April 26, 2012 at 5:18pm

Earth Science
According to the condensation theory, the most important factor for the formation of our planets was _____.
Thursday, April 26, 2012 at 4:41pm

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