Homework Help: Science

Branches of Science

Recent Homework Questions About Science

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

science
Are there enough resources in the world for 8 or 10 billion people to live decent, secure, happy lives?
Thursday, April 26, 2012 at 3:49pm

science
The lock-and-key model holds that?
Thursday, April 26, 2012 at 11:50am

math
One night Angel spent 2 hours and 41 minutes doing homework. She spent 43 minutes on math, 37 minutes on language arts, and half an hour on science. The rest of her time was spent on social studies. How much time did she spend on social studies?
Thursday, April 26, 2012 at 10:26am

Enviro Science
28. Good experiments have 2 key characteristics; they are a. an experimental group and a confirmed hypothesis b. analysis of the control group and an accurate prediction of the outcome c. conducting the actual experiment and reporting the results d. testing a single variable ...
Wednesday, April 25, 2012 at 6:20pm

Science
I'm so confused please help when the kidneys secrete hydrogen ions, does the pH of the urine drop? and when the kidneys secrete hydrogen ions, it lowers the pH of the blood also? I really appreciate any help you can give Thank you
Wednesday, April 25, 2012 at 5:41pm

Science
Which stage occurs in the life cycle of both plants and animals? A.Mature adult B.Adolescent C.Larva D.Seedling A?
Wednesday, April 25, 2012 at 5:33pm

Earth Science
Which of the following is true: -Relative dating tells us how long ago something existed -Disconformities are less common but usually far more conspicuous because the strata on either side are essentially -Estimates indicate that the North American continent is being lowered ...
Wednesday, April 25, 2012 at 5:32pm

science
what would be the complementary strand of DNA be for the following sequence of bases? C T T A G G C T T A C C A I'm stuck please help! my guess was ATTGCCATTGCCA
Wednesday, April 25, 2012 at 5:32pm

Physical Science
A cylinder contains a gas with the pressure of 125kpa at a temp. of 200k. What is the temp. of the gas at a pressure of 100kpa?
Wednesday, April 25, 2012 at 2:15pm

science
The force which is required to move an object of mass 500g to a distance of 4m
Wednesday, April 25, 2012 at 1:56pm

computer science
The owner of the super supermarket would like to have a program that computers the monthly gross pay of their employees as well as the employee's net pay. The input for this program is an employee ID number, hourly rate of pay, and number of regular and overtime hours ...
Wednesday, April 25, 2012 at 9:49am

science
What is the difference between 'cell' and 'battery'?
Wednesday, April 25, 2012 at 6:26am

Science
Three negatively charged spheres, each with a charge of 4*10^-6C are fixed at the vertices of an equilateral triangle wise sides 20cm. Calculate the size and direction of the net force on each sphere.
Tuesday, April 24, 2012 at 8:16pm

science
What are the UV ray statistics from 2002-2012?
Tuesday, April 24, 2012 at 8:04pm

Science
Three negatively charged sphere, each with a charge of a 4*10^-6C, are fixed at the vertices of an equilateral triangle whose sides are 20cm long. Calculate size and direction of the net electric force on each sphere.
Tuesday, April 24, 2012 at 8:00pm

Science
Just to see, how do you measure inches from your hands to the ground with a ruler? Is it like how many inches are left from hands to ground?
Tuesday, April 24, 2012 at 5:45pm

science
Use this reaction to answer the question: 2KClO3 -> 2KCl + 3O2 If I start with 65g KClO3, how many mol O2 will be formed? How many g O2? If I need to produce 299g KCl, how many mol of KClO3 do I need to start with? How many g KClO3?
Tuesday, April 24, 2012 at 3:53pm

science
Use this reaction to answer the question: 2KClO3 -> 2KCl + 3O2. If I start with 65g KClO3, how many mol O2 will be formed? How many g O2? If I need to produce 299g KCl, how many mol of KClO3 do i need to start with? How many g KClO3?
Tuesday, April 24, 2012 at 3:34pm

Enviro Science
23. Which of the following does NOT describe an effect of the Industrial Revolution? a. Fossil fuels became more important energy sources b. The amount of land and labor needed to produce food increased c. Artificial substances replaced some animal and plant products d. ...
Tuesday, April 24, 2012 at 2:54pm

Enviro Science
4. The Earth's tectonic plates and earthquakes are related because a. most earthquakes take place at or near tectonic boundaries b. during an eruption, the plates slip past one another c. of the measure of energy released by the earthquake, called magnitude d. an ...
Tuesday, April 24, 2012 at 2:04pm

science
A straight highway leads to the top of the base of a 50 meter tall tower. Frm the top of the tower, if yhe angles of depression of two cars on the road are 30° and 60° , then the distence between the tow cars is ................meter.
Tuesday, April 24, 2012 at 1:00am

Enviro Science
Describe the diversity of species on Earth, relating the difference between known numbers and estimated numbers Thanks -MC
Tuesday, April 24, 2012 at 12:49am

science
On vernier scale of vernier calliper there are 25 lines and on main scale smallest division is 1 mm then least count of vernier calliper is
Tuesday, April 24, 2012 at 12:46am

science
For ........... the graph of current and voltage is not a straight line and value of resistance is not constant.
Tuesday, April 24, 2012 at 12:39am

science
What will be the final temperature if 1600 cal of heat is given to an ice block of mass 20 grams?
Tuesday, April 24, 2012 at 12:32am

science
What will be the final temperature if 1600 cal of heat is given to an ice block of mass 20 grams?
Tuesday, April 24, 2012 at 12:29am

Science
what happens when you increase the thermal energy of water
Monday, April 23, 2012 at 9:04pm

Math
I have trouble with math, I'm very good at science and when I grow up I want to be a zoologist, the problem is that. MATH I try to pay attention at school but the teacher is very boring and I'm one of those people that can't pay attention when bored. Any tips?
Monday, April 23, 2012 at 8:26pm

Science
Which of the following organisms would most likely be found gazing at a meadow? deer owls cougars mosquitoes deer?
Monday, April 23, 2012 at 5:50pm

Science
Roger made a mixture of salt and sand.Which of the following procedures explains the easiest way to separate the mixture? A.Pour the mixture into a glass of water and stir it until the salt dissolves.Pour the micture through a filter.Evaportate the water. B.Pour the mixture ...
Monday, April 23, 2012 at 5:42pm

Science
Water pollution is harming an ecosystem.Many of the organisms that once lived in the ecosystem moved to a new area.The organisms have moved because if they stayed they would most likely- A.thrive B.become ill or perish C.reproduce more frequently D.create more pollution B?
Monday, April 23, 2012 at 5:34pm

Science
Light that passes through a pair of eyeglasses is- a.transmitted b.absorbed c.reflected d.refracted D?
Monday, April 23, 2012 at 5:26pm

science
identify and describe one environmental problem that causes ill health,accidents,crises.
Monday, April 23, 2012 at 10:10am

science
CO3 2- +MnO4- ---->??
Monday, April 23, 2012 at 7:50am

Science HW Check
D. Name the joint shown in each picture 1. Elmbow answer - Antecubital fossa. 2. wrist answer - carpal 3. shoulder answer - glenohumeral 4. neck vertebras answer - ????????????????? what is the joint in your neck vertebrae called?????????? can you check to see if im correct
Sunday, April 22, 2012 at 9:47pm

science
what are temporary magnets and permanent magnets?
Sunday, April 22, 2012 at 8:45pm

Science
Effects of global warming due to methane gases from land fills and animals? Effects of global warming due to carbon dioxide from cars and factories?
Sunday, April 22, 2012 at 7:47pm

Science
Effects of global warming due to methane gases from land fills and animals? Effects of global warming due to carbon dioxide from cars and factories?
Sunday, April 22, 2012 at 7:24pm

science 6th grade
do you know where I can find in abc order all of the STATES AND THEIR CAPITALS MAYBE A LINK. THIS IS FOR MY HOMEWORK TOMORROW.....THANK YOU IN ADVANCE FOR YOUR HELP!
Sunday, April 22, 2012 at 6:58pm

To Ms. Sue
Ms. Sue I'm REALLY having trouble with those question in my science homework. b. A man has a blood clot in his Femoral artery. Where is the clot? c. Where would a nurse take your radial pulse? E. How is the structure of a bone related to its function? Use one example in ...
Sunday, April 22, 2012 at 5:35pm

Cardiovalscular
Phonology refers to the science which treats A. vocal sounds B. heart rhymths C.nutrional deficiencies D. blood disorders my answer is (C) can someone check my answer
Sunday, April 22, 2012 at 4:26pm

Science 7R - Worksheet (Q5)
********* Sorry I post too much question but these are the questions I'm having trouble with, the other questions on my science worksheet i done it by myself This is the last one I need help with and that's it E. How is the structure of a bone related to its function? ...
Sunday, April 22, 2012 at 3:50pm

Science 7R - Worksheet (Q4)
c. Where would a nurse take your radial pulse? PLEASE help!!!
Sunday, April 22, 2012 at 3:49pm

Science 7R - Worksheet (Q3)
b. A man has a blood clot in his Femoral artery. Where is the clot? please help!!!!
Sunday, April 22, 2012 at 3:48pm

Science 7R - Worksheet (Q2)
C. Where is it located? a. The secretary went to the doctor complaining about Carpal tunnel syndrome. What is hurting her? PLEASE help!!!!
Sunday, April 22, 2012 at 3:27pm

Science 7R - Worksheet
Title of the worksheet - What is the structure and function of our skeletal system? B. Identify three bones that protect internal organs ******** There is this chart on the left it says "bone" and on the right it says "Internal Organ Protected" (there are 3...
Sunday, April 22, 2012 at 2:48pm

FACS - Reading Assignment Help!
I have this reading assignment for Family and Consumer Science. She gave us this packet for notes and to read to answer questions she gave us (that's our reading assignment which she is grading). So we answer the questions and to find the answers we look in the packet (the...
Sunday, April 22, 2012 at 2:47pm

science
A mass,m of water at 100degree celcius is added to another mass of water ,m at a temperature,t. The reslting temperature of the mixture is T. If the specific heat capacity of water is 4.2J/gk. Drive an expression for L terms of other quantities.
Sunday, April 22, 2012 at 7:51am

Science
A ball of mass 0.2kg falls from a height of 45m. On striking the ground it rebounds in 0.1s with two-thirds of the velocity with which it struck the ground. Calculate i the momentum change on hitting the ground, ii the forcn on the ball due to the impact.
Sunday, April 22, 2012 at 5:35am

science
Which techniques would you use if you were trying to detect the presence of a protein? Which techniques would you use to detect gene expression? How would you determine whether a tissue or cell was producing a steroid hormone? How would you confirm that a bioactive molecule ...
Sunday, April 22, 2012 at 12:22am

PSSA
when is the science PSSA test. also if you taken the science PSSA test, what would be on it?
Saturday, April 21, 2012 at 9:00pm

Physical Science
Could use some help. I don't get this: The maintenance department of a botanical garden is monitoring the displacement of statues that have moved by the process of creep. The statues must be straightened when the displacement reaches 15cm to prevent toppling. By measuring ...
Saturday, April 21, 2012 at 5:12pm

Physical Science
Please help me with this. I just don't get it. The average rate of chemical weathering of carbonate rock in an urban area is 2.1 x 10^-3 mm/yr. The depth of lettering of the tombstones shown in the table below was measured in 2010: Date on Tombstone Age (yr) 1910 100 1921 ...
Saturday, April 21, 2012 at 5:08pm

Physical Science
Can't figure this out, HELP!: What is the velocity (v) of a stream with a discharge (Q) of 8.53 x 10^3 m 3/s and a cross-sectional area (A) of 5.27 x 10^3 m2?
Saturday, April 21, 2012 at 5:05pm

Physical Science
Trying to figure this out and can't: The elevation of a streambed is surveyed near a bridge to be 2,367m. At another bridge 12.2km downstream the elevation is 2,232m. What is the gradient of this stream?
Saturday, April 21, 2012 at 5:02pm

Enviro Science
4. Which of the following is NOT a threat that impacts biodiversity? a. use of land for agriculture and housing b. dam construction c. overuse of water d. helping endangered species D 10. If exponential growth occurs in the population of a species of predator, the population ...
Saturday, April 21, 2012 at 1:39pm

science
A doctor advises a patient to change home from the midst of a city to the city outskirts where lichens are found more.what could be the reason behind this advice?
Saturday, April 21, 2012 at 12:00pm

science
scientists often use----to better see how something work? a) models b)data c) procedures d) hypothesis
Friday, April 20, 2012 at 11:51pm

Question (plz read!)
What is Equine Science????
Friday, April 20, 2012 at 10:29pm

Science
Why are x-rays uneffected my electric and magnetic fields. Please help me to understand this. I think that x-rays are unefected because each has a different wavelength of radiation. These different wavelengths cause no effect.
Friday, April 20, 2012 at 8:57pm

science
fill in the blanks with these worsd: galaxies gunpppowder guns hubble space telescope mummy sealed tomb the invention of 1990 of the led to the 1996 discovery of new .
Friday, April 20, 2012 at 5:16pm

science
A rectangular container measuring 28 cm 43 cm 58 cm is filled with water. What is the mass of this volume of water in kilograms and grams? (Take the density of water to be 1000 kg/m3.) kg g
Friday, April 20, 2012 at 9:11am

science
Define the main goals and strategies of green intelligence. Do you think market-based approaches could save the planet? Why or why not?
Thursday, April 19, 2012 at 11:31pm

political science
A _______________ is the best example of an informational benefit provided by many interest groups. a) travel discount b) free T-shirt c) health insurance program d) newsletter e) consciousness-raising workshop
Thursday, April 19, 2012 at 10:29pm

political science
When membership in an organization allows for a reductions in the price of museum tickets, it is called a a) purposive benefit b) bribe c) promotion offer d) material benefit e) solidary benefit
Thursday, April 19, 2012 at 10:27pm

political science
when paid staff conduct most of the daily business of a group, that group is best described as a a) PAC b) free-rider group c) 527 committee d) staff organization e) lobbyist
Thursday, April 19, 2012 at 10:25pm

science
do you know the word galaxy shaped like a wheel whithout cured arms
Thursday, April 19, 2012 at 8:03pm

science
what is the word for high energy body on outer edge of space
Thursday, April 19, 2012 at 7:51pm

Science
A group of trees are on a hillside The trees will most likely compete with one another for- A.carbon dioxide B.soil C.water D.oxygen I think it's C I know that plants take in carbon dioxide and give out oxygen
Thursday, April 19, 2012 at 7:33pm

Physical Science
The conversion of water to ice is considered a physical change, whereas the conversion of iron to rust is considered a chemical change. Why?
Thursday, April 19, 2012 at 7:22pm

Health Science
What is the pulse deficit if an apical pulse is 112 and the radial pulse is 88?
Thursday, April 19, 2012 at 5:44pm

science of sound
a violin string’s length from nut to bridge is 33 cm, and on the open string A=440 Hz is played. What is the wavelength of the sound?
Thursday, April 19, 2012 at 5:15pm

Science
Trees will most likely compete with one another for- A.carbon dioxide B.soil C.water D.oxygen I know trees take in carbon dioxide and release oxygen. But im not sure which is the answer. Is it C?
Thursday, April 19, 2012 at 5:09pm

Science
Which of the following objects can reflect light? A.camera B.telescope C.tinted window D.eyeglasses C?
Thursday, April 19, 2012 at 5:01pm

Science
Which of the following is a star? Earth Sun Moon a Comet? Sun?
Thursday, April 19, 2012 at 4:42pm

Science
A bear is an omnivore.Which of the following would be an example of items a bear could eat that would prove the bear is an omnivore? A.nuts and berries B.fish and berries C.fish and meat D.berries and honey B?
Thursday, April 19, 2012 at 4:29pm

science
An aluminum bar is 2m long at a temperature of 20 degrees C What will be the length of the bar at a temperature of 100 degrees C
Thursday, April 19, 2012 at 1:23pm

science
what are the different methods of helping people to hear again if they have something wrong with the cochlea, eardrum and ear canal.
Thursday, April 19, 2012 at 12:52pm

Plz help me... one science Q!
18. A pebble drops straight down into a tub of water, setting off ____________________ waves that travel at the boundary between the water and air. (1 point)
Thursday, April 19, 2012 at 11:31am

science
Which of the following statements is not correct about reference frames?
Thursday, April 19, 2012 at 2:23am

Science
Explain the relationship between force needed, gravity, and inertia that scientists have to think about when trying to launch something in space.
Wednesday, April 18, 2012 at 10:11pm

general science
calculate the density of a cork of mass 24g and volume 100 cm3. what would its density be if its volume increases to 200 cm3?
Wednesday, April 18, 2012 at 6:18pm

science
Which of the following scales use the concept of absolute zero? I. C II. F III. K IV. R
Wednesday, April 18, 2012 at 3:05pm

science
Thermal energy is different from temperature because thermal energy depends on the _____.
Wednesday, April 18, 2012 at 3:04pm

Physical science
A wave travels along a string at a speed of 1,5m 1s.if the frequency of the source of the wave is 7,5hz,calculate:(a)the wavelength of the wave..(b)the period of the wave
Wednesday, April 18, 2012 at 2:52pm

science
A trash can is rolling down the street at 5 m/s. If the trash can has a mass of 23 kg, what is its momentum?
Wednesday, April 18, 2012 at 2:48pm

Physical science
Anyone working on Sound Investigation lab
Wednesday, April 18, 2012 at 1:39pm

science
Brandon throws a flying disc with a force of 8 N. If the disc has an acceleration of 4 m/s2, what is the mass of the disc?
Wednesday, April 18, 2012 at 8:49am

MATHS
The entrance fees to the Science centre is as follows: Adult :$ 10 Child :$7 A group package of 1 adult and 2 children can be bought at a discounted price of $21. One day, 234 adults and 456 children visited the Science Centre. What is the minimum amount of entrance fees that ...
Wednesday, April 18, 2012 at 3:27am

recyclying
i need help writting a report on recycling for my science class and i dont know how to start please help
Tuesday, April 17, 2012 at 8:03pm

science
need help writing a a short report on recycling im in the sixth grade
Tuesday, April 17, 2012 at 7:58pm

math
There are 25 books in a bookcase. The books in the bookcase are all math, science, and history books. Seven of the books are math books. There are 4 fewer science books than history books. How many science books are in the bookcase?
Tuesday, April 17, 2012 at 7:49pm

science
My son had this assignment and it is totally confusing to me. This is the info provided: 4.5-V lightbulb and 3 batteries that are 1.5 V each Knowing Ohm's law: voltage (in volts) =current (in amps) x resistance (in ohms) or V=IR. Determine in which circuit the voltage was ...
Tuesday, April 17, 2012 at 6:21pm

Science
The science teacher gave each group in the science lab a pair of wires for an investigation on electrical current.Susan noticed that the wires were made of metal,but they were covered with plastic.The wires were covered in plastic because A.plastic is a good conductor and ...
Tuesday, April 17, 2012 at 5:18pm

Science
Michael dropped a 1 inch cube of wood and a 1 inch cube of laed into an aquarium filled with water.The cube of wood floated and the cube of lead sunk quicklu to the bottom. The cube wood floated because it A.is less dense than the cube of lead B.weighs more than the cube of ...
Tuesday, April 17, 2012 at 5:09pm

Science
What does a penguin,whale,and a seal have in common? A.They all breath underwater B.They all eat while on land C.They are all protected from the cold by thick layer of fat D.They are all mammals C?
Tuesday, April 17, 2012 at 4:56pm

Science
Which of the following best describes the relationship between a cheetah and a zebra? A.The cheetah is the predator of the zebra. B.Both the cheetah and the zebra are predators of one another C.The zebra is the predator of the cheetah. D.Both the cheetah and the zebra are ...
Tuesday, April 17, 2012 at 4:40pm

Science
Changing the current changes the ___ of an electromagnet. Choices are: A. strength B. direction C. charge D. both a and b
Tuesday, April 17, 2012 at 2:39pm

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 Answer
Tuesday, April 17, 2012 at 2:13pm

Reading/English
Question 1 of 20 5.0 Points Critical Reading Identify the letter of the choice that best completes the statement or answers the question. What is Mr. Gradgrind’s opinion of horse riders? A. He does not approve of them. *B. He is fascinated with them. C. He believes they ...
Tuesday, April 17, 2012 at 1:59pm

science 3
11. The freezing point of a substance is ____ the melting point of the same substance. (1 point)greater than less than equal to unrelated to 12. For most substances, the distance between particles is smallest when the substance ____. (1 point)exists as a gas exists as a liquid...
Tuesday, April 17, 2012 at 1:34pm

science
1. The ability of an apple to change color when exposed to air is a ____. (1 point)physical property chemical property physical change chemical change 2. Which of the following is NOT a possible sign of a physical change? (1 point)a change in appearance a change in volume the ...
Tuesday, April 17, 2012 at 1:33pm

science-biology
I am in 10th grade and can you please help me by defining what is bio-catalysts?
Tuesday, April 17, 2012 at 1:21pm

English 12
Question 1 of 20 5.0 Points Critical Reading Identify the letter of the choice that best completes the statement or answers the question. What is Mr. Gradgrind’s opinion of horse riders? A. He does not approve of them. B. He is fascinated with them. C. He believes they ...
Tuesday, April 17, 2012 at 9:33am

engineering science
a bale of weight 200 newtons hanged at the end of a rope.find the acceleration of the bale if the tension in the rope is 200 newtons,150 newtons,300 newtons.
Tuesday, April 17, 2012 at 5:23am

science
Does adding boiled, deionized water to the titrating flask to wash the wall of the erlenmeyer flask and the buret tip increase, decrease, or have no effect on the Ksp value of the Ca(OH)2?
Tuesday, April 17, 2012 at 5:00am

science
what is matter?
Tuesday, April 17, 2012 at 1:10am

Science
What does the A stand for in LBA plates?
Tuesday, April 17, 2012 at 1:00am

to ms.sue
this is what i flunked. SCIENCE for magnets and electricity!
Monday, April 16, 2012 at 5:42pm

Health Science
Implementation of informatics has shown to be effective in many areas of health care. Perform a brief literature review and discuss one area that has shown significant savings in the operating budget.
Monday, April 16, 2012 at 1:54pm

science
How many moles are in a 12.0 g sample of iron (II) oxide
Monday, April 16, 2012 at 11:10am

science
what is buffer (ing) solution and its application with one example? and buffer system in blood?
Monday, April 16, 2012 at 9:35am

engineering science
The spherical side mirror on a car is convex and has a radius of curvature of 25 cm. Another car is following, 20 m behind the mirror. If the height of the car is 1.6 m, how tall is its image?
Monday, April 16, 2012 at 4:56am

Science
Why are space telescopes able to make better observations in the ultraviolet and infrared ranges than ground-based telescopes? A)space telescopes are closer to the objects that they are observing B) the atmosphere absorbs or reflects much of the UV and IR radiation C) space ...
Sunday, April 15, 2012 at 7:17pm

Earth/Space Science
Earth's axis tilts at an angle of 23.5 degrees relative to its orbit. Analyze the climate conditions that would exist at the poles and the equator if the axis were parallel to the orbit.
Sunday, April 15, 2012 at 6:43pm

science
A 1.4 kg ball and a 3.0 kg ball are connected by a 1.0 m long rigid, massless rod. The rod is rotating cw about its center of mass at 24 rpm. What torque will bring the balls to a halt in 4.2 s?
Sunday, April 15, 2012 at 4:45pm

Environmental Science
7. Which of the following terms is used to describe a linear sequence in which energy is transferred from one organism to the next as each organism eats another organism? a. trophic level b. food web c. energy pyramid d. food chain D 10. Which of the following is an example of...
Sunday, April 15, 2012 at 4:29pm

Physics Question
Pulsed lasers used in science and medicine produce very short bursts of electromagnetic energy. If the laser light wavelength is 1062 nm (this corresponds to a Neodymium-YAG laser), and the pulse lasts for 40 picoseconds, and 1.1 x 104 wavelenghs are found in the laser pulse, ...
Sunday, April 15, 2012 at 7:06am

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