Homework Help: Science

Branches of Science

Recent Homework Questions About Science

Science
What do the hairlike structures on a cell do? Please don't give me a link to another website. Thank you!
Friday, April 5, 2013 at 8:01pm

Science
What are the responsibilities of humans toward natural resources? Describe three of the environmental challenges humans face today.
Friday, April 5, 2013 at 7:29pm

Science
Describe the geomorphic processes that shape the Earth’s surface. Use the Yosemite Valley to explain one or more of those processes.
Friday, April 5, 2013 at 7:03pm

World Geography
REVIEW 1.An area in which a single culture or cultural trait is dominant is called a ____________. A. culture B. cultural landscape <<<<<<<, C. norm D. culture region 2.Cultures often develop along with science and ____________. A. tools <<<<&...
Friday, April 5, 2013 at 3:27pm

science
Calculate the work done by lifting a stack of books 0.5 m onto a table. The force you exerted eas 150N. Please help I am lost as how to do this
Friday, April 5, 2013 at 1:01pm

computer science
draw a level 0 diagram as well as a context diagram for the following scenario When renting a car from Banz Car Rental Agency, persons renting a car from the agency will be given a brochure of the type of vehicle, insurance on vehicle and the rental conditions of the vehicle, ...
Friday, April 5, 2013 at 10:58am

building science
how do we calculate the equilibrant if the upward force is 450N and the downward force is 750N acting on the same line?
Friday, April 5, 2013 at 2:13am

science computer
accept input age, height and weight for some people. The loop will stop when the user enters value 0 for age. Calculate average for age, height and weight, and print the number of people and average age, height and weight.
Thursday, April 4, 2013 at 10:28pm

Science
How does heart rate increase? Does it double? Does it increase with the intensity of the workout? I already know the background of heart rate but have trouble with the questions above.
Thursday, April 4, 2013 at 9:35pm

science
A ________ biome is a cold, dry area where the sun barely rises during the winter. a. coniferous forest b. temperate deciduous forest c. grassland d. tundra this is a 7th grade question and can a science teacher help me out on this please so i can study for a make up test ...
Thursday, April 4, 2013 at 6:03pm

science
what are the answers to the ecosystems packet for 7th grade in science? I need the answers asap because i need to finish getting all of the answers to the packet so i can study it tonight because i need to make up the test to that packet and it is because the day my teacher ...
Thursday, April 4, 2013 at 5:35pm

chemistry/science
What are the groups of atoms inside iron called?
Thursday, April 4, 2013 at 4:46pm

science
if aluminum has the density of 2.7g what would the mass be?
Thursday, April 4, 2013 at 3:35pm

science
Does a rollercoaster have its greatest GPE at the top of the tallest hill or the bottom of the lowest dip?
Thursday, April 4, 2013 at 2:35pm

science
Convert 32 newton-meters to Joules. Please help!
Thursday, April 4, 2013 at 1:45pm

science
Pls how can I carry out qualitative analysis on iron 11 ammonium sulphate hexahydrate (NH4)2SO4.FeSO4.6H2O in a secondary school laboratory?
Thursday, April 4, 2013 at 12:25am

Science
A jet aircraft is traveling at Mach 2.5 through air at 1 °C. What is the jet's speed in m/sec? I can do the equation myself, I just need to know what equation I need to do in order to find the answer.
Wednesday, April 3, 2013 at 10:42pm

ON SCIENCE!!
How many pairs of homologous chromosomes would be in an offspring? Please give me an answer not a link to another website. Thanks.
Wednesday, April 3, 2013 at 9:29pm

science
going 80 km/h how far can you travel in 30 minutes?
Wednesday, April 3, 2013 at 8:02pm

Science
Why does changing the shape of an object have no effect on the density of that object? Because it's still the same item all you did is change how it looks. The mass and matter stays in the object. Is this correct
Wednesday, April 3, 2013 at 7:09pm

Science
Define mass How much something weighs Define volume The amount of space in something Define density and show the formula for calculating density The amount of mass or matter in an object D=M/V
Wednesday, April 3, 2013 at 6:53pm

science
A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?
Wednesday, April 3, 2013 at 6:12am

science
a 20 meter flag staff casts a shadow of 12 meter.what is angle of sunrays to the tree
Wednesday, April 3, 2013 at 4:11am

science
can you simply explain what happens to ice that breaks off a glacier that lands in the water
Tuesday, April 2, 2013 at 11:54pm

science
if a ball that has a density of 1.17 g cm3 placed in the beaker, where will the ball come to rest
Tuesday, April 2, 2013 at 11:38pm

Science
How many grams of CaCl2 are required to prepare 2.00 liters of 7.00 M CaCl2?
Tuesday, April 2, 2013 at 11:11pm

Math
1.During the last 5 shifts, Gary delivered 9,8,14,17, and 12 pizzas. What is the mean number of pizzas delivered during a shift? 12 2.Stephie's science experiment produced the following results:183,204,179,191,186.What is the range? 26 3.What is the mode of the city league...
Tuesday, April 2, 2013 at 6:28pm

Earth science
Earth’s troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?
Tuesday, April 2, 2013 at 6:02pm

Earth science
Waste produced by people along the East Coast of the United States has been dumped into the Atlantic Ocean where it is distributed by surface ocean currents. Which coastal area is most likely to become polluted by this waste?
Tuesday, April 2, 2013 at 5:55pm

Science
Abiotic means non living Biotic means living The following list is to enter into a Venn Diagram where the circles are labeled Abiotic and biotic whale is biotic clock is abiotic water is abiotic fish is biotic paper is both glass is abiotic aluminum is abiotic wooden ruler is ...
Tuesday, April 2, 2013 at 5:34pm

SCIENCE/ECOLOGY
I NEED HELP IN PREPARING A DEMOPRAPHIC AND ENVIRONMENTAL TIMELINE WHICH INCLUDES DEATH RATES, BIRTH RATES, POPULATION CHANGES, AND MAJOR HISTORY CHANGES
Tuesday, April 2, 2013 at 4:00pm

science
Calculate the de Broglie wavelength of a 0.44 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).
Tuesday, April 2, 2013 at 3:31pm

science "Genetics" Mendel
You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sex-linkage. That is, male chickens have two copies ...
Tuesday, April 2, 2013 at 9:11am

physical science 2nd semester
what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)
Tuesday, April 2, 2013 at 12:09am

Science ASAP
1. Angiosperms have organs such as ______________ and produce seeds. The are described as _________________plants. (1 point) flowers; vascular stems; pollinated rhizoids; vascular leaves; non-vascular 4. Of the following, which is NOT a characteristic of vascular plants? (1 ...
Monday, April 1, 2013 at 9:07pm

science
What are 4 examples of physical systems designed by people?
Monday, April 1, 2013 at 8:57pm

science help ASAP please
1. Angiosperms have organs such as ______________ and produce seeds. The are described as _________________plants. (1 point) flowers; vascular stems; pollinated rhizoids; vascular leaves; non-vascular 4. Of the following, which is NOT a characteristic of vascular plants? (1 ...
Monday, April 1, 2013 at 8:22pm

Science
Okay, I need help with balancing equations. It's so frustrating for a 7th grader! -_- My problem is: _Na3PO4 + _KOH = NaOH + _K3PO4
Monday, April 1, 2013 at 5:36pm

science
If a scale model of the planets are built with Earth's diameter set to 10 centimeters, how big would the model of Jupiter have to be in centimeters?
Monday, April 1, 2013 at 5:18pm

science need help
2 H2 + O2 = 2H2O 2 grams + 32 grams=_ _ _ _ _grams how would the mass of water formed in the reaction compare to the mass of oxygen and hydrogeb that reacts. in your response be sure to: include they type of change illustrated in the balanced eqaution explain the conservation ...
Monday, April 1, 2013 at 11:15am

Science Physics
An object weighs 12 N on earth. When it is brought to Mars, it has a weight of 4.8 N. What is the acceleration due to gravity on Mars? (Taking the acceleration due to gravity on earth is 10 m/s²)
Monday, April 1, 2013 at 10:17am

science need help
2 H2 + O2 -> 2 H2O 2 grams + 32 grams -> _ _ _ _ _ grams how would the mass of water formed in the reaction compare to the mass of oxygen and hydrogen that reacts? include types of change illustrated in the balanced equation. explain the conversation of matter and ...
Monday, April 1, 2013 at 9:54am

Science Check Answer
5. Acceleration is a change in position and speed. True or false I think False
Sunday, March 31, 2013 at 9:41pm

SCIENCE 8R - HELP!
...G.....g G..GG...Gg g..Gg...gg G - Blue g - Black G - Dominant g - recessive Homozygous - ????????? Heterozygous - ??????? Please help ..... I need to find the percentage of Homozygous and Heterozygous and find which on is Homozygous and Heterozygous! (I have to make up a ...
Sunday, March 31, 2013 at 5:21pm

science
2 H2 + O2 -> 2 H2O 2 grams + 32 grams -> _ _ _ _ _ grams how would the mass of water formed in the reaction compare to the mass of oxygen and hydrogen that reacts? include types of change illustrated in the balanced equation. explain the conversation of matter and ...
Sunday, March 31, 2013 at 4:37pm

science
when 1 gram of water evaporated the volume of the water vapor increases but the mass remains constant. why does the water remain constant i think because the number of atoms remain constant
Sunday, March 31, 2013 at 1:21pm

science
why the tilt of axis causes summer to be warmer than winter in the northern hemisphere i put because the rays of the sun strike the northern hemisphere more directly in the summer. but it could also be because northern hemisphere is closer to the sun in the summer.
Sunday, March 31, 2013 at 12:43pm

Gr 10 science
I can't find a picture to build a model of calcium sulphate using styrofoam ball pls help
Sunday, March 31, 2013 at 12:25pm

science
reasons for the increase or dissipation of hurricane strength
Sunday, March 31, 2013 at 11:02am

electronic,physical,science
A circuit that combines two or more signals is called a mixer. In this lab, your goal is to build a mixer that combines the signals generated by two voltage sources, V1 and V2, where: V1 is a 1 kHz square wave that varies between 0V and +1V, and V2 is a 5 kHz sine wave that ...
Saturday, March 30, 2013 at 10:58pm

science
1. genetic _______ (1 point) 2. are formed by _________ (1 point) 3. can be changed by natural ___________ (1 point) 4. can be changed by _________ (1 point) 5. can be changed by selective ____________ (1 point) 6. which leads to _____________ (1 point) PLEASE HELP!!!
Saturday, March 30, 2013 at 4:40pm

Science
What pumps blood
Saturday, March 30, 2013 at 10:22am

Intro to Logic
10. A strongly supported claim in science should be regarded as
Saturday, March 30, 2013 at 6:54am

Science
A tin can is filled with water to a depth of 37 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 32 degrees above the horizontal. Find the range of this stream of water. x=? Find the maximum height of this stream of water...
Friday, March 29, 2013 at 11:52pm

language arts Ms. Sue please
5. Which of the following sentences is punctuated correctly? (1 point) I'd like to go outside but I need to finish my homework first. Since Bobby's birthday is in July he isn't able to celebrate with his classmates. Even if I have to do it myself I will fix the gym...
Friday, March 29, 2013 at 7:06pm

science
a guitar string is 75cm long,calculate the wavelength of its fundamental note
Friday, March 29, 2013 at 4:52pm

Science check answer
1. Acceleration involves a change in ____. speed velocity displacement direction I think its b.
Friday, March 29, 2013 at 4:02pm

Science Plz help
1. Acceleration involves a change in ____. speed velocity displacement direction 2. Which of the following statements about acceleration is true? Like velocity, acceleration has a direction. Your acceleration is positive when you speed up. Your acceleration is negative when ...
Friday, March 29, 2013 at 1:42pm

science
1mole of liquid water at 25 c and 1 atm forms 1 mole of steam at 100 c and 1 atm. the molar heat capacity of water 373 k is 40.79kj/mol and the molar heat capacity of water is 75.3 J. assume ideal gas behavior for steam. Calculate delta U, delta H and delta S
Friday, March 29, 2013 at 10:21am

science
science is very important for us because what
Friday, March 29, 2013 at 9:35am

Science
Explain why .100 m NaCl in water does not have a freezing point equal to a) -0.183 degrees Celsius b) -0.366 degrees Celsius
Thursday, March 28, 2013 at 7:07pm

Science Grade 8
Siberian tigers originated in the far northern continent of Asia. The climate is extremely cold, since much of the land is within the Artic Circle. They were forced south over time and now reside in Southeast Asia, such as India, Thailand and Cambodia. They still have thick ...
Thursday, March 28, 2013 at 6:22pm

science
can you describe the process of cellular respiration.include the words:sugar,energy,carbon dioxide,and water
Thursday, March 28, 2013 at 4:42pm

science
1. For the three cubes shown below, determine their surface area, volume and surface area to volume ratio. Then, circle the one you believe would be the most efficient and write a summary stating why.
Thursday, March 28, 2013 at 11:30am

science
32g of KCI OR KCIO3 IN 100ML OF WATER, AT WHAT TEMP WOULD IT BECOME SATURATED.. WHAT IF IT IS 37g? Thank you
Wednesday, March 27, 2013 at 11:43pm

Science
How is playing on a seasaw an example of the scientific definition of work
Wednesday, March 27, 2013 at 9:50pm

Science ASAP please
1. Which of these sources of energy is NOT renewable? (1 point) wind solar power hydroelectric power natural gas 2. Air can be polluted by ____. (1 point) tiny particles of soot carbon monoxide sulfuric acid all of the above 3. Which of the following can cause acid ...
Wednesday, March 27, 2013 at 8:23pm

science
What is the formula for friction force
Wednesday, March 27, 2013 at 7:19pm

science
On a clear night, Ram correctly identified some clouds among the stars as the Milky Way. What part of the Milky Way was MOST visible to Ram? a]asteroids b]dust c]planets d]stars I think it is ethier b or d. Please help. Appreciative. ;]
Wednesday, March 27, 2013 at 5:28pm

Science due tmrw
Which simple machine does not change the direction of a force?
Wednesday, March 27, 2013 at 4:25pm

Science
A plane is flying 500mph east.The wind is blowing 50mph west.What is the netforce.Please help i need this question awensered by March 2013,31.
Wednesday, March 27, 2013 at 1:36pm

science
how do ear defneders work
Wednesday, March 27, 2013 at 10:09am

computer science
This week you will determine the time complexity for a game of your choice. You should select a game that can be played in algorithmic steps and determine the maximum time (in notation) it will take to play the game. Use the guidelines below in your report. Include the ...
Tuesday, March 26, 2013 at 10:51pm

Science
When hot magma rises toward the crust the process is called what
Tuesday, March 26, 2013 at 6:08pm

Physical Science
Which part of an electric circuit resists the flow of charge when it changes electrical energy into other forms of energy? A. battery B. copper wires C. switch D. light bulb i've posted this before but it's getting buried. i dont think its A or B.
Tuesday, March 26, 2013 at 6:06pm

Science
What are the four main gases in our atmosphere? Carbon dioxide oxygen nitrogen? I searched it up and it says argon is the other one but we haven't learned about that yet Would hydrogen be a main gas?
Tuesday, March 26, 2013 at 5:53pm

Science
Which part of an electric circuit resists the flow of charge when it changes electrical energy into other forms of energy? A. battery B. copper wires C. switch D. light bulb
Tuesday, March 26, 2013 at 5:44pm

Science
7. Which of the following changes gives no evidence that a chemical reaction has taken place? A cube of solid forms a puddle of liquid. A certain liquid is added to a solid, and bubbles of gas form. Two liquids are mixed, and a precipitate forms. Heating a blue solid turns the...
Tuesday, March 26, 2013 at 5:25pm

Science
About 10 percent of the earth’s surface are covered with glaciers today. Where are most of these glaciers found
Tuesday, March 26, 2013 at 4:01pm

physical science
what is the electric force of attraction (in newtons) between a proton and an electron? assume the distance between them is 5*10 negetive11 meter
Tuesday, March 26, 2013 at 2:01pm

physical science
during a race a runner runs at a speed of 6 m/s. 2 seconds later she is running at a speed of 10 m/s. what is runners acceleration? show your work.
Tuesday, March 26, 2013 at 11:19am

science
should'nt i use the equation mgh+half mv^2before=mgh+half mv^2aftr?.
Tuesday, March 26, 2013 at 11:04am

science
should'nt i use the equation mgh+half mv^2before=mgh+half mv^2aftr?
Tuesday, March 26, 2013 at 11:03am

science
at a construction site a crane lifts a block of mass,m,vertically upwards through a height of 70 m at constant speed by means of a strong cable.The block experiences a force of magnitude 8 N as a result of air friction as it is lifted vertically upwards. The cable does 377 860...
Tuesday, March 26, 2013 at 10:08am

science
Monique heated the black substance with some corbon. Copper was formed. what are all the elements in the blue crystals ?
Tuesday, March 26, 2013 at 5:56am

Science
Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol
Monday, March 25, 2013 at 9:32pm

Science
Are the following examples physical changes or chemical changes. Mixing yeast and sugar Dissolving sugar in water Slicing bread Baking bread Melting cheese
Monday, March 25, 2013 at 8:30pm

science
after 30s, a runner is spriting at 3m/s. But, 10s later, the runner is sprinting at 3.8m/s. What is the runner's acceleration during this time?
Monday, March 25, 2013 at 8:22pm

science
For a given area of land, the average rate of creep is 14 mm per year. How long will it take the area to move 1 m?
Monday, March 25, 2013 at 7:57pm

Science
1. To a scientist, a river is a kind of stream. True or False. 2. All streams carry sediment. T/F. 3. A delta keeps growing. T/F. 4. Heavy rain always cause flooding. T/F. 5. A river bank is at the end of a river. T/F.
Monday, March 25, 2013 at 6:52pm

science
During condensation, what must be changed, temperature or heat energy?
Monday, March 25, 2013 at 3:55pm

math please help
Anneke's science class measured 10 inches of rainfall during the month of May what was the average rainfall per day?(Round your answer to the nearest hundredth.) Please answer and explain.
Monday, March 25, 2013 at 3:40pm

Science help
Which of the following technologies is a result of space research and development? A.improved pacemakers B. equipment to allow police to change traffic signals C. cochlear implants to help deaf people hear D. all of the above
Monday, March 25, 2013 at 3:30pm

math
Anneke's science class measured 10 inches of rainfall during the month of May what was the average rainfall per day?(Round your answer to the nearest hundredth.) Please answer and explain.
Monday, March 25, 2013 at 3:30pm

science
What caused by matter that has an electric charge?
Monday, March 25, 2013 at 3:14pm

Science
What is Earth's surface (sea level)? Its pressure is 14.7 psi. That is what is the number of ft.
Monday, March 25, 2013 at 2:02pm

Science
All forms of energy can do work. A.true B.false I think this is true..?
Monday, March 25, 2013 at 10:28am

Science
Please help me with matching the stages of the meiosis to its proper description. Sentences: 1. Members of each homologous pair separate from each other (chromatids) still remain together). 2. Homologous chromosomes pair up with each other and chromosomes 'cross over' ...
Monday, March 25, 2013 at 6:56am

Science
A thermally insulated 50ohm resistor carries a current of 1A for 1s. The initial temperature of the resistor is 10degree, its mass is 5g, and its specific heat capacity is 850j/kg/k. Calculate the change in entropy of the resistor and what is the change in entropy of the ...
Sunday, March 24, 2013 at 11:33pm

Applied Behavioral Science
Recognizing Culture Gaps As a leader, how might a leader recognize a culture gap? What are some techniques leaders might use to influence and change cultural values when necessary?
Sunday, March 24, 2013 at 9:17pm

science 207
chronic asthms when caused by air p[ollution is ,most likely due to: short term pollutant exposer long term pollutant exposer thbe weather during an episode of pollutant expossure exposure to a cerain kind of pollutant
Sunday, March 24, 2013 at 7:16pm

science 297
chronic asthma when caused by air pollution is most likely due to
Sunday, March 24, 2013 at 7:10pm

science
What will eventually occur if in deep space an astronaut's wrench is outside the spacecraft moving with the same velocity as the spacecraft?
Sunday, March 24, 2013 at 6:18pm

cycles of matter (life science)
How does the Laws of Conservation of Matter and Energy relate to the Cycles in Nature?
Sunday, March 24, 2013 at 12:00am

Earth and Space Science
which is closer to earth a moon or galaxy?
Saturday, March 23, 2013 at 10:09pm

Earth and Space Science
Put the following astronomical bodies in order from largest to smallest: a. Universe b. Galaxy c. Moon d. Planet e. Solar System f. Comet
Saturday, March 23, 2013 at 9:47pm

Science
Which would you measure in millimeters , a capacity of a juice box or the capacity of a water pitcher?
Saturday, March 23, 2013 at 5:15pm

Science
if you start with 150g of co-60 and 40 g remain, how much time has passed? co-60 has a half lie of 5 yrs
Saturday, March 23, 2013 at 3:04pm

Science
If the half-life of a radionuclide is 1 month, is a sample of it completely decayed after 2 months?
Friday, March 22, 2013 at 11:07pm

physical science
What physical quantities are governed by the quantum numbers of an atomic electron?.
Friday, March 22, 2013 at 11:05pm

Forces (Science)
Describe 2 contact and 2 non-contact force examples. Please and thank you very much. :)
Friday, March 22, 2013 at 7:52pm

Forces (Science)
What slope would a person have on a distance-time graph if they were speeding, slowing down, or not moving at all?
Friday, March 22, 2013 at 7:41pm

Physical science
Help Please . Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate? A.increasing water temperature B.decreasing water temperature C.using more water
Friday, March 22, 2013 at 6:49pm

physical science
Help please. Aisha drops an antacid tablet in water and times how long it takes to dissolve. Which of the following will decrease the reaction rate?
Friday, March 22, 2013 at 6:29pm

Science
Are compounds chemical or physical changes of matter?
Friday, March 22, 2013 at 11:48am

Science 8th grade
what gets hot and cold faster, solid or gas and why?
Friday, March 22, 2013 at 11:46am

science
If an airplane directly north at 2000 km/hr and there are 50 mph/hr winds blowing west. whis is the actual path of the plane seen from someone on the ground? What is the ground speed of the plane in mph?
Friday, March 22, 2013 at 1:59am

Math
Annie's math test scores are 68 82 82 88 92 98 Her median test score is.. A.30 B.82 C.85 D.88 C? The high temperature for the last 5 days were 28,28,32,55,77 What is the range? A.28 B.32 C.44 D.49 D? The high temperature for six days in August were 93,98,100,102,102,105 ...
Thursday, March 21, 2013 at 10:53pm

science
whats a change of dna in an organism?
Thursday, March 21, 2013 at 10:30pm

science
Who made the first light bulb?
Thursday, March 21, 2013 at 9:30pm

Science
Name 3 ways screws are used?
Thursday, March 21, 2013 at 9:26pm

Physical Science (Ms. Sue)
Why does some friction occur with seemingly smooth surfaces?
Thursday, March 21, 2013 at 9:05pm

Physical Science
How is friction involved in sledding and skiing?
Thursday, March 21, 2013 at 9:01pm

science
what is the gravitational attraction between the sun and the other planets?
Thursday, March 21, 2013 at 7:48pm

Earth Science
If a sample contains 70g of Carbon 14 and 70g of Nitrogen 14, how many half lives has it undergone? (show all of your work)
Thursday, March 21, 2013 at 7:41pm

SCIENCE
HOW CAN YOU USE 2 LAMP BATTRIES AND THREE SOCKETS TO MKE A LIGHT ENERGY BUT ALSO STATIC ELECTRICITY
Thursday, March 21, 2013 at 7:29pm

science
Most nekton ____ the ocean? A.swim in B. drift at the surface of C. attach to the bottom of D. all of the above
Thursday, March 21, 2013 at 7:09pm

physical science
A hot air balloon is rising upwards at a constant velocity of 5 m/s . When the balloon is 60 m above the ground , a sand bag is released from it and allowed to free fall . Ignore the effect of air resistance and assume that the balloon continues to move with the same constant ...
Thursday, March 21, 2013 at 3:07am

Science
Assume you can heat water with perfect insulation (all the heat from combustion of ethanol is transferred to water). What is the volume of ethanol required to heat 100 mL of water by 10 degrees C? (You will need to look up density of ethanol, specific heat capacity or water, ...
Thursday, March 21, 2013 at 2:08am

Science ASAP
1. Drought, fewer plants, and fewer nesting sites are examples of __________. (1 point) limiting factors biotic factors abiotic factors population density 2. As you move from level to level in an energy pyramid, energy ____. (1 point) decreases increases stays at the same ...
Wednesday, March 20, 2013 at 9:07pm

science
how can understanding matter help in the real world?
Wednesday, March 20, 2013 at 8:36pm

Science
How do the structures of organisms compare and contrast to nonliving structures like construction cranes,ships,airplanes or bridges?
Wednesday, March 20, 2013 at 7:35pm

science
How do organs relate to cells and tissues?
Wednesday, March 20, 2013 at 7:34pm

science
How does the hierarachical organization of organisms work within a system?
Wednesday, March 20, 2013 at 7:33pm

Lang, Arts
1.Which of the following would always require a citation in a research paper? A.Thesis statement B.an anecdotal experience C.a quotation D.a humorous statement I think it is C...? 2. Which of the following shows the correct parenthetical citation for information from page 57 ...
Wednesday, March 20, 2013 at 6:10pm

science
answer check?? 1) What two tissues are found within a vein? Xylem and Phloem. 2) What does the word "Mesophyll" mean? Middle Leaf. 3) What two layers of the plant contain chloroplasts? Palisade layer and Spongy layer. 4) The outermost layer of a cell: Epidermis. 5) ...
Wednesday, March 20, 2013 at 6:07pm

science
How much does it cost to operate a 80-{\rm W} lamp continuously for a week if the power utility rate is 25 {\rm cents}/{\rm kWh}.
Wednesday, March 20, 2013 at 3:46pm

Science
Miguel is skipping rocks across the surface of a lake. After he throws it, each stone goes through the following motions: I. the stone moves toward the water II. the stone hits the surface of the water and bounces off III. gravity pulls the stone back toward the water IV. the ...
Wednesday, March 20, 2013 at 3:32pm

Science
My science fair project is growing bacteria from food that is left out and seeing how much the bacteria increases over time. How would I write my hypothesis?
Tuesday, March 19, 2013 at 11:15pm

Science
Find examples of the golden ratio in nature -- a minimum of 10 examples. Explain how your examples of the golden ratio in nature relates to symmetry found in the animal kingdom.
Tuesday, March 19, 2013 at 9:18pm

Science
The Keq for the equilibrium below is 5.4 × 1013 at 480.0 °C. 2NO (g) + O2 (g) ↔ 2NO2 (g) What is the value of Keq at this temperature for the following reaction? NO2 (g) ↔ NO (g) + 1/2 O2 (g) The Keq for the equilibrium below is 5.4 × 1013 at 480.0...
Tuesday, March 19, 2013 at 4:26pm

Science
Which solution below has the highest concentration of hydronium ions? pH = 9.82 pH = 12.6 pH = 7.93 pH = 3.21 pH = 7.00
Tuesday, March 19, 2013 at 4:25pm

Life science
Investigate the effect of the environment on phenotype
Tuesday, March 19, 2013 at 4:18pm

Science
A construction worker exerts 209N to move a load of bricks a distance of 10m across the parking lot,how much work does he do?
Tuesday, March 19, 2013 at 12:40pm

science
Suppose a laboratory has a 31 g sample of polonium-210. The half-life of polonium-210 is about 138 days. How many half-lives of polonium-210 occur in 966 days? How much polonium is in the sample 966 days later?
Tuesday, March 19, 2013 at 12:19pm

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