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Homework Help: Science

Branches of Science

Recent Homework Questions About Science

Post a New Question | Current Questions

4th grade science
What kind of heat transfer cause Earth's najor wind pattern?
Saturday, November 7, 2009 at 8:35pm

gr9science
how do u convert g/ml to Kg/m^3 ?
Saturday, November 7, 2009 at 5:44pm

science
Name three freshwater resources and 3 ocean water resources and their descriptions
Saturday, November 7, 2009 at 5:25pm

science
what are the four major fields of earth science? please help and thank you
Saturday, November 7, 2009 at 4:33pm

science
how does adding copper to gold change the economic value of the gold and the properties of the gold?
Saturday, November 7, 2009 at 4:02pm

science
If a cube of Jello is cut into two pieces, what property of the pieces did not change?
Saturday, November 7, 2009 at 11:26am

science
please list out 6 functions of the blood and please write the reference of it
Saturday, November 7, 2009 at 4:51am

science
what is the connection between native americans and federal government
Friday, November 6, 2009 at 11:15pm

Science
how is a caldera formed
Friday, November 6, 2009 at 9:29pm

Science
why does high silica magma tend to form volcanic domes with steep sides
Friday, November 6, 2009 at 8:41pm

Science
what is the silica content of magma that has low velocity
Friday, November 6, 2009 at 8:37pm

Science
what is the silica content of magma that has low velocity
Friday, November 6, 2009 at 8:35pm

science
Can someone please tell me when a chromosome is a chromosome and when it is called a chromatid. For ex/ after anaphase the chromatids are now each called a chromosome,etc
Friday, November 6, 2009 at 5:23pm

SCIENCE/MATH
Land growing continuous grain corn as a cash crop loses soil at a rate of 14.0 metric tonnes ha-1 yr-1. This is a fertile soil, which has an organic matter content of 3.8% and nitrogen content of 0.35% (both by mass). a)Calculate how long it will take to erode the entire Ah ho...
Friday, November 6, 2009 at 12:17pm

Grd.10 Science
So i did a science lab today, and i am supposed to come up with the skeleton equation for it The chemical reaction is decomposition (starting with one compound that will break off into 1 or more compounds after reaction) This is what i have so far : Cu (CO3) ---> CO2 + ____...
Thursday, November 5, 2009 at 8:39pm

Marine Science
Clownfish Mating: Can you compare and contrast reproductive strategies employed by other animals?
Thursday, November 5, 2009 at 8:13pm

To Gunjan
Your posts have been removed. In the future, please remember these things: 1. This is a homework help website; please put your subject (math, science, English, or ??) in the subject line to make it faster for each teacher to find those questions in his/her areas. An even bette...
Thursday, November 5, 2009 at 12:48pm

Science
where can i find a good site that will show me the change's of the earth's atmosphere?
Thursday, November 5, 2009 at 12:04pm

science
Arrange the following from the most work to the least. For each instance, calculate the total amount of work done. Show all calculations, including units of measure. 1. pushing a box of math books weighing 600 newtons a distance of 20 meters -12000J 2. pulling a television wei...
Thursday, November 5, 2009 at 10:46am

science
respected teachers, i need brief biography about 1. Charles Darwin 2. Galileo Galilee 3. Louis Pasteur and 4. Marie curie thanks your sincerely x-y-z
Thursday, November 5, 2009 at 9:59am

Science
the cause is xylem dries up and dies, what is the effect? this is for my chapter of plant transport system
Thursday, November 5, 2009 at 12:16am

science grade 10
how to you say FeSO4(aq) in words
Thursday, November 5, 2009 at 12:07am

science
what is a group of atoms having a net electrical charge
Thursday, November 5, 2009 at 12:02am

finding online article
I need help finding an article online. It has to be on biomedical engineering related or science related. And the article has to talk about 3D or 2D or 2.5D imaging methods. I found a 2D and 3D article. But I can't find one about a 2.5D imaging sensor or machine. please help
Wednesday, November 4, 2009 at 9:51pm

5TH GRADE SCIENCE
where in nature could you find a source of the same energy as that provided by batteries?explain
Wednesday, November 4, 2009 at 8:59pm

Science
What would happen if all the clocks in the world were to stop for seventy-two hours.
Wednesday, November 4, 2009 at 7:53pm

science
What does meiosis produce?
Wednesday, November 4, 2009 at 7:50pm

science
explain how the nucleus can control what happens in a lysosome?
Wednesday, November 4, 2009 at 7:05pm

physical science 8th grade
Copper has 2 known isotopes: ^63CU atomic mass= 62.9298 and ^65 CU atomic mass=64.9278. The average atomic mass of copper is 63.546 amu. Calculate the fraction(percent) of each of the 2 isotopes of copper
Wednesday, November 4, 2009 at 5:34pm

science
A truck is stopped at a stoplight. When the light turns green, the truck accelerates at 2.2 m/s2. At the same instant, a car passes the truck going 12 m/s. Where and when does the truck catch up with the car?
Wednesday, November 4, 2009 at 5:12pm

science
How much work will be necessary for the band members to move the new 120 kilogram amplifier to the garage where they practice, if they were to slide the amplifier a distance of 35 meters on a frictionless surface at an acceleration of 2 meters/second? Show all calculations, in...
Wednesday, November 4, 2009 at 2:06pm

science
For each of the activities listed below: 1. Describe one way in which work is done (Reminder: For work to be done, the force and the distance must be in the same direction.). 2. List two simple machines used in each task. 1. making a meal oven, microwave 2. traveling to school...
Wednesday, November 4, 2009 at 2:05pm

science
Arrange the following from the most work to the least. For each instance, calculate the total amount of work done. Show all calculations, including units of measure. 1. pushing a box of math books weighing 600 newtons a distance of 20 meters 12000J 2. pulling a television weig...
Wednesday, November 4, 2009 at 1:50pm

Earth Science
Earth is always changing. What are two forces that cause the earth's surface to constantly change and what are their effects on the planet? Please answer within a few minutes.
Wednesday, November 4, 2009 at 1:08pm

science
For a machine with an efficiency of 80%, what is the work output of the machine if its work input is 2,000 joules? would i divide 2000/.80? which gives me 2500? Also, If a machine requires an effort force of 750 newtons applied over a distance of 2 meters, over what resistance...
Wednesday, November 4, 2009 at 1:06pm

science
For a machine with an efficiency of 80%, what is the work output of the machine if its work input is 2,000 joules? would i divide 2000/.80? which gives me 2500?
Wednesday, November 4, 2009 at 12:34pm

science
Select the choices in which work is done by recording "yes" or "no": 1. Reese completing her chemistry homework. NO? 2. the movers carrying Catalina's amplifier from the moving truck to her house. NO? 3. Li pushing his motorcycle down his driveway. YES?...
Wednesday, November 4, 2009 at 12:21pm

science
what is the speed needed to launch a space crop in outer space?
Wednesday, November 4, 2009 at 7:45am

science
what is the wavelength of radiation with a frequency of 1.50 times 10^13s-1? Does this radiationhave a longer or shorter wavelength than red light? also... What is the energy of a photon of microwave radiation with a frequency of 3.20 times 10^11 s-1?
Tuesday, November 3, 2009 at 10:17pm

Science (7th Grade)
My science teacher is really mean. And if I don't have the following questions done, I have a suspention! Please help!! 1) What discovery demonstrated that atoms are not the smallest particles? 2) Dalton did what to his theory that Democritus did not? 3) It is important fo...
Tuesday, November 3, 2009 at 8:07pm

science
What is an axis?
Tuesday, November 3, 2009 at 7:41pm

Science
Thanks Bob Pursley!!
Tuesday, November 3, 2009 at 7:08pm

science
a snowball rolls off the edge of a horizontal roof at a velocity of 7 m/s. what is the speed of the snowball 3 s later?
Tuesday, November 3, 2009 at 7:00pm

science
The gravitational force of the Earth in relation to the gravitational force of everything else on Earth represents a(n) _____ that causes everything to all toward the center of the earth. Is the answer unbalanced force; balanced force; centrifugal force; or centripetal force?
Tuesday, November 3, 2009 at 6:58pm

Computer Science-Java
Hi, I am writing an application class for a Lunar Calendar I created in a service class and I have to make sure it is able to detect that the year entered is not in the range of values(I have done this in the service class using a switch statement) and be able to detect if the...
Tuesday, November 3, 2009 at 5:45pm

science
How does the concentration of salts in a soil affect potatoes? I need to know a liitle a bit about this to be able to create a hypothesis for my lab report. Thanks
Tuesday, November 3, 2009 at 5:39pm

science 275
Where can I find information on how to mitigate a plan for ethanol effect on Atmospheric issues? Just tell me how to do it not do it for me Thank you
Tuesday, November 3, 2009 at 3:40pm

Life Science
By living in areas where other organisms inhabit,humans change the environmental conditions for those organisms. Describe two ways humans impact the environment and what the effects are on the earth? Thesse can either be positive or negative. Please answer in a few minutes.
Tuesday, November 3, 2009 at 11:55am

Introduction Enngineering
For what reason did the French Academy of Science create the metric system
Tuesday, November 3, 2009 at 10:16am

Computer Science
Given that main memory is composed of three page frames for public use and that a program requests pages in the following order. dcbadcedcbae a.) using the FIFO range removal algorithm, do a page trace analysis indicating page faults with asterisks (*). then compute the failu...
Tuesday, November 3, 2009 at 9:05am

science
how does weight affect the amount of kinetic energy a moving object has?
Monday, November 2, 2009 at 9:41pm

Science,Ecology
What do iterlocking food chains make up?
Monday, November 2, 2009 at 9:03pm

chemistry, science
Carbon is also removed from the atmosphere during the process of weathering. carbon dioxide combines with water to form carbonic acid. this reacts with calcium silicate (in rocks) to produce calcium ions, bicarbonate ions and silicon dioxide (silica) the chemical equation for ...
Monday, November 2, 2009 at 8:51pm

general science
If a graph shows time on the horizontal axis and speed on the vertical axis, a stright horizontal line across the graph would indicate?
Monday, November 2, 2009 at 6:55pm

11th grade Physical Science
How fast must a 1,000 kg car be moving to have a kinetic energy of: (a) 2.0 x 10^3, (b) 2.0 x 10^5, (c) 1.0 kW x h? How high would you have to lift a 1,000 kg car to give it a potential energy of: (a) 2.0 x 10^3, (b) 2.0 x 10^5, (c) 1.0 kW x h?
Monday, November 2, 2009 at 6:07pm

science
true or false the force of friction acts in the SAME direction as the direction of the sliding object
Monday, November 2, 2009 at 5:56pm

science
Indacate whether each item below is an example of primary or secondary succesion. Give your reasons for each choice. a) Lichen grows on barren rock in the tudra.
Monday, November 2, 2009 at 3:50pm

science
when you look you cannot see me if you see me you cannot see anything else i can make you walk when you can't sometimes i tell the truth and sometimes i lie
Monday, November 2, 2009 at 2:40pm

Science
A biologist is studying the epithelial cells in a variety of plants and animals. She counts the chromosomes in the epithelial cells of several organisms and finds the following numbers: Organism A: 32 chromosomes Organism B: 26 chromosomes Organism C: 24 chromosomes Organism D...
Sunday, November 1, 2009 at 9:21pm

6th grade(science
how is ignous rock formed
Sunday, November 1, 2009 at 7:59pm

Natural science
short myths associated with Eclipse
Sunday, November 1, 2009 at 5:30pm

science
i couldnt figure this one out. Materials, such as water, that become gaseous easily at room temperature are called volatiles. How does the complete lack of volatiles in lunar rocks support the impact theory of moon's formation? please help and thank you
Sunday, November 1, 2009 at 5:10pm

science
how does the size of the moon's core support the impact theory of the moon's formation? please help and thank you
Sunday, November 1, 2009 at 4:47pm

space science
how does the size of the moon's core support the impact theory of the moon's formation? please help and thank you
Sunday, November 1, 2009 at 3:42pm

science
bounce gruond based microwaves off of rain and snow.used to track the direction and speed of storms?
Sunday, November 1, 2009 at 1:22pm

science
why is high pressure so important in plant oil extraction
Sunday, November 1, 2009 at 11:59am

science
a change in size, shape or form is what kind of change?
Sunday, November 1, 2009 at 11:50am

Science
Respected teachers, I have got assignment that i have to write about 7 scientists i am in class 6 and we have to write 1 page for 1 scientist we have to write about their life style and what they invented and how they were great and i know names of some scientists .... Albert ...
Sunday, November 1, 2009 at 5:06am

Physical sciences
How do u calculate the oxidation numbr of an unspecified atom?
Friday, October 30, 2009 at 7:44pm

Science
Why is it cooler at the earth survice on cloudy days?
Thursday, October 29, 2009 at 7:26pm

Environmental Science
Take the greatest care with your significant digits. If you don¡¦t, this question is not ¡§do-able¡¨. Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru has a ...
Thursday, October 29, 2009 at 6:46pm

Environmental Science
In a measurement of precipitation (rainfall), a raingauge with an orifice (collector) area of 30.50 in2 collects 1.30 litres of water over a period of 26 minutes and 45 seconds. Calculate: a. The depth (amount) of rain that fell (in mm). b. The intensity (mm h-1) at which the ...
Thursday, October 29, 2009 at 6:44pm

science
how far will a stone travel if its thrown off a 78.4 meter cliff at 5 meters per second
Thursday, October 29, 2009 at 6:21pm

science/physics
A fisherman yanks a fish out of the water with an acceleration of 4.5m/s2 using very light fishing line that has a ''test'' value of 100N. The fisherman unfortunately loses the fish as the line snaps. What can you say about the mass of the fish? (please help)
Thursday, October 29, 2009 at 1:25pm

science
the _____ equator is at the 0 degrees latitude. the _______ equator is an imaginary line marking the tempeture equilibrium between the hemispheres
Wednesday, October 28, 2009 at 8:20pm

science
what do you call a 3D triangular shape that bends light when it passes through
Wednesday, October 28, 2009 at 6:33pm

science
what is the word for the straight light travels in?
Wednesday, October 28, 2009 at 6:23pm

8th grade
Please Help Me. I'm doing a Science Fair Project, and I need help with finding simmilar experiments to mine. My experiment is: Which saliva is cleaner: Cat, Dog, or Human???
Wednesday, October 28, 2009 at 6:22pm

marine science
how does the earth redistribute the uneven amount of solar energy recieved by earths surface
Wednesday, October 28, 2009 at 4:29pm

science
how much force is needed to move a 10000kg airplane at 12.0 m/s
Wednesday, October 28, 2009 at 4:26pm

last one! science!
A typical high school lab activity involves building a model rocket with a small canister, antacid, and water. The water and antacid are combined in the canister, which is then tightly closed and turned upside down. The reaction of these materials in the canister causes gas to...
Wednesday, October 28, 2009 at 3:49pm

science
John loads a collapsed inflatable boat into a two wheel "grocery type" handcart and wheels it down to the lake. While the cart is being wheeled it is tipped at about a 45-degree angle (in other words, about halfway between horizontal and vertical). John finds this ti...
Wednesday, October 28, 2009 at 3:01pm

science
Arrange the amount of momentum of these objects from the most momentum to the least momentum. When placing the objects in the correct order, record the value of their momentum. 1. A 0.4 kg baseball thrown by a major league pitcher at 120 m/s. 48kg*m/s 2. A 0.04 kg bullet trave...
Wednesday, October 28, 2009 at 3:00pm

science
How would i set these up? like what is the equations? # A tennis player hits a tennis ball with a force of 330 N, and it accelerates at the rate of 5,500 m/s2. What is the mass of the tennis ball? # Li is pedaling his bike with a force of 220 N. The combined mass of Reese and ...
Wednesday, October 28, 2009 at 2:45pm

science
# a quarterback throwing the football unbalanced # a pickup truck cruising at a constant velocity balanced # two teams in a tug of war at a standstill balanced # a math book sitting on top of a table balanced # Reese and Li moving Catalina's amplifier a short distance bala...
Wednesday, October 28, 2009 at 2:37pm

SCIENCE
WHICH PROCESS PRODUCES MOST OXYGEN IN ATMOSPHERE PHOTOSYNTHESISI OR TRANSPIRATION WHICH GAS DOES PHOTOSYNTHESISI PRODUCE OXYGEN OR CARBON DIOXIDE GRAS--GRASSHOPPER-SNAKE-HAWK IF APART OF A FOOD WEB WOULD MORE MORE ARROWS POINT TOWARD OR AWAY FOR THE SECOND LEVEL CONSUMER WHY
Wednesday, October 28, 2009 at 6:52am

Political Science-PLEASE HELP
What are the American Government system's strengths and weaknesses?
Wednesday, October 28, 2009 at 3:04am

MATH/SCIENCE
Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru(Ich) has a catchment area of 1250 km2. The Aeron(Iae) has a catchment area of 2.400 * 106 ha. The outflow stream, the Afon Rhondda (Orh) has a...
Wednesday, October 28, 2009 at 1:14am

physical science
What is the force between two balloons with negative charge of 2.3 x 10^-12 C if the balloons are 46 cm apart?
Tuesday, October 27, 2009 at 9:27pm

Environmental science
Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru(Ich) has a catchment area of 1250 km2. The Aeron(Iae) has a catchment area of 2.400 * 106 ha. The outflow stream, the Afon Rhondda (Orh) has a...
Tuesday, October 27, 2009 at 9:01pm

science
At its highest point, the pendulum is 1.2m above the ground and as a gravitational potential energy of 62J. If the gravitational potential energy is 10J at its lowest point, what is the pendulum's kinectic energy at this point?
Tuesday, October 27, 2009 at 7:11pm

social science
What are some issues that might cause the president to call a joint session of Congress?
Tuesday, October 27, 2009 at 7:02pm

Science
When the insect travels to another flower, it transfers pollen to ________, helping the plant to reproduce.
Tuesday, October 27, 2009 at 6:46pm

Political Science-PLEASE HELP
What are the system's greatest strengths and weaknessess? Please help fast.
Tuesday, October 27, 2009 at 6:16pm

SCIENCE
IN ORDER TO MAKE EXPERIMENTS MORE ACCURATE WE TAKE MEASURMENTS'COMPLETE THE TABLE BELOW USING YOU'R KNOWLEGE OF SCIENTIFIC INTSTREMENTS ' MESERMENTS AND UNIT'S
Tuesday, October 27, 2009 at 5:33pm

ENVIRONMENTAL SCIENCE ( math/science)
Llyn y Gweision (a Welsh lake) has a surface area of 10 km2. It is fed by two rivers: the Afon Chwefru and the Nant Aeron. The Chwefru(Ich) has a catchment area of 1250 km2. The Aeron(Iae) has a catchment area of 2.400 * 106 ha. The outflow stream, the Afon Rhondda (Orh) has a...
Tuesday, October 27, 2009 at 3:58pm

science
Mitosis: Number of chromosomes in cells production Meiosis: Number of chromosomes in cells production.
Tuesday, October 27, 2009 at 3:46pm

Environmental Science
If you were an environmental researcher and were given funding to assist with one environmental issue, which of the following topics would you choose to spend your funds on? • Energy Conservation What influenced your choice? What would the ultimate goal of your research be?
Tuesday, October 27, 2009 at 1:29pm

science
hurricanes in the northern hemisphere always travel north while hurricanes in the southern hemisphere always travel south. This is due to the earths _______ and is called the ________ ________. can you help me fill in the blanks
Tuesday, October 27, 2009 at 1:20pm

physical science
What is the change in thermal energy of water in a pond with a mass of 1,000kg and a specific heat of 4,184j(kgdegreesc) if the water cools by 1 degree c
Tuesday, October 27, 2009 at 1:17pm

Science
Does anyone know the scientific names for palm leaves or rose leaves? Thanks.
Tuesday, October 27, 2009 at 9:10am

pre-algebra
mr conner's students made kites in science class. he brought a 500-yd bolt of twine to tie to the kites. if he wants to give each student a piece of twine 331/3 yards long. what is the maximum number of pieces of twine mr. conner will be able to make from the bolt of twine?
Tuesday, October 27, 2009 at 12:19am

science 8th
give an example of a chemical formula.
Tuesday, October 27, 2009 at 12:14am

Science
A ball is thrown from a cliff at a horizontal speed of 3m/second and at the same time a second ball is dropped straight down from the cliff. How fast will the dropped ball be going after 2 seconds?
Monday, October 26, 2009 at 8:46pm

Science
In a measurement of precipitation (rainfall), a raingauge with an orifice (collector) area of 30.50 in2 collects 1.30 litres of water over a period of 26 minutes and 45 seconds.[10] Calculate: 1) The depth (amount) of rain that fell (in mm). 2) The intensity (mm h-1) at which ...
Monday, October 26, 2009 at 8:27pm

social science
why does the constitution specify different ways to determain the number of members for the House and for the Senate?
Monday, October 26, 2009 at 8:16pm

science
what type of cell is mitosis? what type of cell is meiosis?
Monday, October 26, 2009 at 7:54pm

science
How are elements represented on a periodic chart?
Monday, October 26, 2009 at 7:38pm

Childhood Education
Learning to make candy from a recipe would relate most directly to which two of the 13 activity areas? A Math and science B Social studies and science C Cooking and math D Social studies and cooking . I belive the C is the correct answer
Monday, October 26, 2009 at 6:42pm

Science
How many stars form the bowl of the Big Dipper and What part of a carrot plant could be considered a wedge?
Monday, October 26, 2009 at 6:08pm

science 7thgrade
in an organism containig many cells how is th work of the cell performed
Monday, October 26, 2009 at 5:47pm

Science 8th grade
What is the mass of a piece of aluminum that has a volume 100.0^3?
Monday, October 26, 2009 at 4:27pm

Computer Science - Java
Hi, For an assignment I am doing, we have to have 2 service classes and one application class. One service class is already written (i.e. DiceGame1) and I am writing another one (i.e. Player) that is supposed to use the previous service class an instance variable. I was just w...
Monday, October 26, 2009 at 4:15pm

science
how does mass differ from weight what is law of universal gravitation
Monday, October 26, 2009 at 4:14pm

Childhood Education
Learning to make candy from a recipe would relate most directly to which two of the 13 activity areas? A Math and science B Social studies and science C Cooking and math D Social studies and cooking
Monday, October 26, 2009 at 4:10pm

science
What are the physical features of niagra falls.
Monday, October 26, 2009 at 12:50pm

Science
What is a gel, and what is a sol (as in aerosol, hydrosol,etc.)?
Monday, October 26, 2009 at 8:20am

English
I want to improve the flow of this sentence. I would greatly appreciate any insight, minor or major. Here is the sentence, which is intended as a thesis: L. Ron Hubbard, in founding Scientology, has created a dangerous contemporary cult that suppresses free speech, mistreats a...
Monday, October 26, 2009 at 2:26am

Science
Who studies the biosphere?
Sunday, October 25, 2009 at 7:45pm

Science
How many electron are in each electron shell in an atom of argon?
Sunday, October 25, 2009 at 6:31pm

Science
FeS + HCl yields FeCl2 + H2S Balanced Equation & Type of Reaction
Sunday, October 25, 2009 at 5:11pm

science
what are the chemical properties of scandium
Sunday, October 25, 2009 at 4:38pm

science
what is gravitational potential energy and what is kinetic energy?
Sunday, October 25, 2009 at 4:36pm

Physical Science
An object travels 6m in the first second of travel, 6m again durning the second second of travel, and 6m again druning the third second. It acceleration in meters per second per second(M/S2) is
Sunday, October 25, 2009 at 1:20pm

psydag-science
thankyou for the websites you found the last one was perfect it helped alot thankyou again :)
Sunday, October 25, 2009 at 12:46pm

SAT essay
Most of us tend to accept the opinions of the authority because we believe that those who are in the position of authority are more likely to know the truth and make wise decisions. However, the people in authority can sometimes make mistakes. If we stick to their ideas withou...
Sunday, October 25, 2009 at 11:48am

science
a 49 newton rock is lifted in 5 seconds A. how much work is done? B.what power is used? How do you write this question out
Sunday, October 25, 2009 at 11:08am

science
please could someone hep me. for my assignment i need to write a newspaper article about cane toads in australia. i need to include what they eat ,where they originate,how big they are and other info. thankyou!:)
Sunday, October 25, 2009 at 2:36am

environmental science
1. Checkpoint: Population Size • View the Ch. 7 Alien Invasion VLR located under the Week Four Materials section of your student Web page. • Post a 200- to 300-word response to the following: o Explain the four factors that produce changes in population size. o Which...
Saturday, October 24, 2009 at 10:41pm

science
a womans lifts a 300 newton child a distance of 1.5 meters and carries her forward for 6.5meters. how much work does the woman do in lifting the child? b.how much work does the child do?
Saturday, October 24, 2009 at 8:59pm

science
a teacher pushed a 98 newton desk acrosss a floor for a distance of 5 meters she exerted a horizontal force of 20 newton How much work was done?
Saturday, October 24, 2009 at 8:55pm

science
a 49 newton rockis lifted 2meters in 5 seconds How much work is done? b what power is used?
Saturday, October 24, 2009 at 8:53pm

science
a mr wikinson backpack weighs 45 pounds if there are 453.7grams in one pound what is the mass of his backpack?
Saturday, October 24, 2009 at 8:41pm

science
mrs rossow ran the Yakima river cayons marathon the course is 27.2 miles long and it took her 2 hours and 15 minutes to finish if she weighs 135pounds calculate the work and power she used. A.work B.power
Saturday, October 24, 2009 at 8:39pm

science
Mr beck gigantic gas guzzling exhaust spewing urban assault vehicle suburban weighs 10000ponds it takes mr becck 2 minutes to drive 1.5 kilometers to west valley fitness so he can ride the stationary exercise bike for a half hour How much work and power did the suburban do? A....
Saturday, October 24, 2009 at 8:34pm

science
a box pushed across the floor for a dis tance of 5 meters with a force of 50 newtons in 5 second how much work is done? what is the power?
Saturday, October 24, 2009 at 8:25pm

science
mr mcmurry taked 4327 sips of mountain dew each day. each time he takes a drink he moves the bottle 45cm to his mouth and another 45cm to his mouth and another 45cm back to the table .If the bottle has a massof 567 grams (5.1newtons)how much work does Mr Mcmurry do during the ...
Saturday, October 24, 2009 at 8:16pm

earth science
Why are some crystals large and perfect, while others are small and irregular? The only answer in my book that seems close is : The crystal shape, hardness, cleavage and density of a mineral are determined by the internal arrangement of its atoms or ions. I don't see anyth...
Saturday, October 24, 2009 at 6:49pm

science
Napolweon pencil has a mass of 3 grams (0.27Napoleon ) when he lifts his pencil from the desk to his paper he moves it an average of 20cm (o.20m) He then returns it to his desk moving it another 20cm How much work did he do on his pencil? w=FXD
Saturday, October 24, 2009 at 12:58pm

science
Mrs leuenberger ran the same marathon but since her husband was hunting and she couldn"t find a babysitter she had to carrY her two daughter in her arms they weighs 40pounds and 55 pounds mrs leuenberger weights 145pound (butyou didnt hear that from me) How much work and ...
Saturday, October 24, 2009 at 12:55pm

science
Mr.wilinson carried his backpack 12kilometers and set up camp on the edge of cutthroat lake it took him 3 hours to get there from the trailhead how much work did he do on his backpack on the hike in?(1pound=453.7grams=4.1newtons)EXPAIN
Saturday, October 24, 2009 at 12:45pm

science
Napolweon pencil has a mass of 3 grams (0.27Napoleon ) when he lifts his pencil from the desk to his paper he moves it an average of 20cm (o.20m) He then returns it to his desk moving it another 20cm How much work did he do on his pencil? w=FXD
Saturday, October 24, 2009 at 12:39pm

Science
Mass= 48g; volume=24 cm3 . What is the density of this substance ?
Saturday, October 24, 2009 at 1:51am

science report card
What does '% of Spread' mean?
Friday, October 23, 2009 at 9:36pm

Political Science-PLEASE HELP
Consider the following scenario: You are a criminal defense attorney, and your client has just been found guilty by a U.S. district court in Illinois. in 200-300 wors What are your options for appeal? Describe the appeals process all the way to the U.S. Supreme Court. What is ...
Friday, October 23, 2009 at 8:42pm

science
some facts about the marine biome
Friday, October 23, 2009 at 8:10pm

MATH/SCIENCE HELP
1. In a measurement of precipitation (rainfall), a raingauge with an orifice (collector) area of 30.50 in2 collects 1.30 litres of water over a period of 26 minutes and 45 seconds.[10] Calculate: a. The depth (amount) of rain that fell (in mm). b. The intensity (mm h-1) at whi...
Friday, October 23, 2009 at 1:43pm

environmental science
Sorry I forgot to add the rest of my question to my post I wanted to know what is a good way to teach myself mitigation strategies and solutions about energy conservation?
Thursday, October 22, 2009 at 11:50pm

enviromental science
what is a good way to educate myself on mitigation strategies and solutions?
Thursday, October 22, 2009 at 11:46pm

science
is chlorophyll needed for cellular respiratin
Thursday, October 22, 2009 at 10:31pm

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