Branches of Science
Recent Homework Questions About Science
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science
What is the wavelength of waves transmitted by an AM radio station operating at a frequency of 840 kilohertz? Calculate the energy of a photon whose frequency is 2450 megahertz What is the difference in energy for a photon of ultra-violet radiation, wavelength 319 nm and a ...
Wednesday, December 5, 2012 at 10:42pm
7th grade science Ms. Sue please
Hi I am writing a paper for school about cancer cells. I can't seem to get a good introductory paragraph going. Can you give me some ideas? Thanks!
Wednesday, December 5, 2012 at 9:15pm
Science
The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 1.091×10−3 M−1s−1. What is the initial rate of reaction in a reactor ...
Wednesday, December 5, 2012 at 9:12pm
Science
A radioactive substance is found to register 1000 counts per second on a Geiger counter. Twenty-four hours later it registers 125 counts per second. What is its half-life?
Wednesday, December 5, 2012 at 9:09pm
physical science help please!
If a sample emits 1000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 2 meters from the sample?
Wednesday, December 5, 2012 at 8:55pm
Science HELP PLEASE
A mouse pushes a piece of cheese with a mass of 6.4 g for a distance of 75 cm over a frictionless surface. He exerts a constant 0.5 N force as he does so. If the cheese starts from rest, what is it's final velocity?
Wednesday, December 5, 2012 at 8:30pm
Science ~conversions~
On my physics home work i have a question that puts the weight in grams, and i need to find the acceleration. I know that the formula is F=ma, and Force is in newtons, mass is in kg and acceleration is in m/s^2. but can you still find the acceleration by using grams with out ...
Wednesday, December 5, 2012 at 5:31pm
Science
If a 20 gram sample of a radioactive substance has a half-life of 6000 years, how many grams would be present after 18000 years?
Wednesday, December 5, 2012 at 4:21pm
Physical Science- Help Please!
Suppose that you are given a 100 gram sample of a radioactive substance with a half-life of 32 days. How many grams will be left after 192 days?
Wednesday, December 5, 2012 at 4:13pm
science
three ways objects can move are
Wednesday, December 5, 2012 at 4:11pm
science
three forces that can be used to move an object are
Wednesday, December 5, 2012 at 4:08pm
phsical science
what is the period of a string that vibrates with a frequency of 20 times per second
Wednesday, December 5, 2012 at 2:55pm
Science
Why is "I have to lose weight" not an accurate statement?
Wednesday, December 5, 2012 at 12:57pm
Science
Stacy has .55kg water sample at 1 atm pressure and 40 degrees celsius. She heats it to 90 degrees Celsius, maintaining constant pressure. How much heat was absorbed by the solution during the course of this operation? (CP of H2O (l) = 4.18 J/g )
Wednesday, December 5, 2012 at 10:20am
science
at what altitide(height above earth's surface) would temperatures be 22 degrees C?
Wednesday, December 5, 2012 at 9:58am
science
Which example describes a method of relative dating? A. using fossils to determine the oldest rock layer in a canyon B. using radioactive isotopes to calculate the age of a rock C. measuring the depth of tree bark D. examining historical records to determine when a volcano ...
Tuesday, December 4, 2012 at 10:27pm
Science
How can I compare the terms rotation and revolution by creating a Venn diagram? How does the diagram look like?
Tuesday, December 4, 2012 at 10:06pm
Science
A garden contains 20 different species of plants. Five of these plants are ferns. What percent of the garden is made up of ferns?
Tuesday, December 4, 2012 at 10:04pm
Science
In one or two sentences, summarize what happens during each of the two stages of cellular respiration?
Tuesday, December 4, 2012 at 7:22pm
Basic Engineering2. Materials Science
Boron is used to dope 1 kg of germanium (Ge). How much boron (B) is required to establish a charge carrier density of 3.091e7/cm^3. One mole of germanium has a volume of 13.57 cm^3 and weighs 72.61 gram. Give answer in grams of boron? I have no idea how to solve this problem. ...
Tuesday, December 4, 2012 at 7:02pm
Science
In one or two sentences, summarize what happens during each of the two stages of cellular respiration?
Tuesday, December 4, 2012 at 6:44pm
science
Assume that the hereditary information carried in genes and DNA is responsible many differences observed in humans and other living things. How could just four different bases in DNA strands be responsible for the almost endless variety found in nature?
Tuesday, December 4, 2012 at 6:38pm
Science
What objects are located between the orbits of Mars And Jupiter? :I
Tuesday, December 4, 2012 at 6:35pm
Science
What object(s) are located between the orbits of Mars and Jupiter
Tuesday, December 4, 2012 at 6:09pm
Science
What is Pluto mainly composed of?
Tuesday, December 4, 2012 at 6:03pm
Science
Are dwarf planets located in the Kuiper Belt?
Tuesday, December 4, 2012 at 5:57pm
Science
Which planet has the strongest winds in the solar system and the Great Dark Spot?
Tuesday, December 4, 2012 at 5:38pm
Science
How are Jupiter and Saturn similar?
Tuesday, December 4, 2012 at 5:37pm
Science
Write a paragraph explaining why a color-blind man who has three daughters and one son with normal color vision might have two grandsons who are color-blind. Use the terms in the vocabulary box in your answer. Underline each term. genotype recessive phenotype dominant allele ...
Tuesday, December 4, 2012 at 4:19pm
Science
A car traveled at an average speed of 60 mph for two hours. How far did it travel? A. 30 miles B. 60 miles C. 120 miles D. 150 miles
Tuesday, December 4, 2012 at 12:53pm
Science
Which property can be used to help identify an unknown substance? Specific Heat combustion temperature Tyndall effect
Tuesday, December 4, 2012 at 12:21pm
science
the frequency of a source is 20KHz. THE FREQUENCIES OF SOUND WAVE PRODUCED BY IT IN WATER AND AIR WILL BE.
Tuesday, December 4, 2012 at 9:24am
science
Sandy walked to school this morning because it was nice and warm outside.When school let out, a cold front was moving through. What was the weather most likely as she walked home? A)warmer C)the same B)cooler D)it is unpredictable my answer is A),am i right if not please tell ...
Monday, December 3, 2012 at 9:03pm
EOG science
Javier lives on the west coast of the U.S near San Francisco. What are the temperatures most likely like where he lives? A)the temperature is always hot. B)the temperature is always below freezing. C)the temperature is moderate and doesn't change much. D)the temperature ...
Monday, December 3, 2012 at 8:32pm
Math (trigonometry)
MONDAY December 3, 2012 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th...
Monday, December 3, 2012 at 8:14pm
Science
What would be a good conductor for a closed circuit?
Monday, December 3, 2012 at 7:12pm
science
Draw conclusion. Tasha had a foam cup of hot cocoa The cocoa stayed hot and the cup didn't get too hot to hold explain why
Monday, December 3, 2012 at 7:02pm
science
Grapic organizer.show details that support this main ideals.thermal energy moves through solids liquid, gases and space
Monday, December 3, 2012 at 6:59pm
science
Fast help Please Hurry!!!!!!!!!!!!!!!!!!!!!! A bicyclist is in a 50-km race. He says he had an average velocity of 35. What is missing in the cyclist’s velocity? A. units only B. units and distance C. direction only D. units and direction
Monday, December 3, 2012 at 5:54pm
science
im blank today please help thanks!!!!!!!!!!! It takes a car 1.75 h to go from mile marker 10 to mile marker 115. What is the average speed of the car? A. 1.6 mph B. 60 mph C. 65 mph D. 183 mph
Monday, December 3, 2012 at 5:45pm
science
Hurry!!!!!!!!!!!!!!!!!!! If you are asked to determine an object’s speed, what information must you have? A. distance and period of time B. distance and change in position C. period of time and direction D. distance and direction
Monday, December 3, 2012 at 5:41pm
english
17. Few people know about the complex science behind the construction of elevators. (1 point) demonstrative adjective interrogative adjective indefinite adjective proper adjective
Monday, December 3, 2012 at 5:27pm
Science
How did plate tectonics affect the evolution of dominant animal life during the Mesozoic era?
Monday, December 3, 2012 at 3:43pm
6th grade science
Which is a method of relative dating? A. examining historical records to determine when a volcano erupted B. using fossils to determine the oldest rock layer in a canyon C. measuring the depth of tree bark D. using radioactive isotopes to calculate the age of a rock I think ...
Monday, December 3, 2012 at 3:03pm
science
what are the forces on two charges of +0.60 C and +2.0 C, respectively, if they are seperated by a distance of 3.0 m?
Monday, December 3, 2012 at 1:52pm
Science
What in soda generates electricity? What about in water?
Monday, December 3, 2012 at 12:59pm
science
what is the effect if not property handeld in soap.
Monday, December 3, 2012 at 6:09am
science
Whatis the effect if not handeld the cough syrup?
Monday, December 3, 2012 at 6:02am
science
how much heat is required to heat 500 g of copper from 20 degree celsius to 80 degree celsius? specific heat of copper is 0.093 cal/g- degree celsius
Sunday, December 2, 2012 at 9:39pm
Science
Express mass of the Earth in unit of M. Take ME = 6 x 1024kg.
Sunday, December 2, 2012 at 8:37pm
Science
Express mass of the Earth in unit of M. Take ME = 6 x 1024kg. The apparent magnitude of the sun is £¡ 26.81 and that of another star is£¡1.81. How much brighter the sun is with respect to that star ?
Sunday, December 2, 2012 at 8:28pm
science
if a DNA virus infects a cell, why must it produce RNA?
Sunday, December 2, 2012 at 6:39pm
science
how does the retrovirus obtain its envelope?!?
Sunday, December 2, 2012 at 6:38pm
Applied behavioral Science
Of those below, the most important factors insecndary aging are porbly 1 race and culture income and education amount of secual activit and STIs race adn ethnicity Answer: race and culture
Sunday, December 2, 2012 at 5:15pm
Science
What is mantenrep?
Sunday, December 2, 2012 at 4:53pm
Science
Based on the following information: A series of chemicals were added to some AgNO3(aq). NaCl(aq) was added first to the silver nitrate solution with the end result shown below in test tube 1, NH3(aq) was then added with the end result shown in test tube 2, and HNO3(aq) was ...
Sunday, December 2, 2012 at 4:50pm
English
(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and ...
Sunday, December 2, 2012 at 2:35pm
Computer Science (Programming Logic And Design)
Create a program that outputs a letter grade for a student based on the following table: From To Grade 90 100 A 80 89 B 70 79 C 0 69 F I dont understand how to do this. Would you mind helping me get the answer to this Program?
Sunday, December 2, 2012 at 2:18pm
Computer Science (Programming Logic And Design)
Create a program that outputs a letter grade for a student based on the following table: From To Grade 90 100 A 80 89 B 70 79 C 0 69 F I dont understand how to do this. Would you mind helping me get the answer to this Program?
Sunday, December 2, 2012 at 2:18pm
Computer Science (Programming Logic And Design)
How do i Create a program that determine the shipping cost for an order based on the following chart: From To Price $0.00 $19.00 $2.95 $20.00 $49.99 $3.95 $50.00 $74.99 $4.95 $75.00 $1000.00 $Free
Sunday, December 2, 2012 at 1:41pm
Science
______ is a major component of bones and the proteins that build muscles.
Sunday, December 2, 2012 at 12:56pm
Science
The process of changing free nitrogen gas into a usable form of nitrogen is called?
Sunday, December 2, 2012 at 12:55pm
Science: Physics
A force of 50 N directed at an angle of 45 degrees from the horizontal pulls a 70 kg sled across a frictionless pond. The acceleration of the sled is most nearly (sin 45 degrees = cos 45 degrees = 0.7).
Saturday, December 1, 2012 at 10:12pm
science
A wolf us chasing a rabbit.Graph the wolf's motion using the following data: 15 m\s at 0 s,10 m\s at 3 s,1 m\s at 4 s,and 0 m\s at 5 s.What does the graph tell you???
Saturday, December 1, 2012 at 9:36pm
science
To 90.0mL of a solution that contains 0.100M Cr(NO3)2 and 0.490M HNO3 is added 30.0mL of 0.170M K2Cr2O7. The dichromate and chromium(II) ions react to give chromium(III) ions. Write a balanced net ionic equation for the reaction.
Saturday, December 1, 2012 at 1:42pm
Science
You may have heard "Nothing is Free" explain why this is true
Saturday, December 1, 2012 at 11:31am
English
(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and ...
Saturday, December 1, 2012 at 10:26am
political science- PHL
is it a comprehensive answer? Machiavelli (in terms of political philosophy) Machiavelli was an Italian philosopher. A famous book he wrote is ‘The Prince’ which still have impact to today’s politics. It is about the rise and fall of states and what the leader ...
Saturday, December 1, 2012 at 8:37am
political science- PHL
how Hobbes, Machiavelli and Rousseau are relevant? little guidance please
Saturday, December 1, 2012 at 7:35am
political science- PHL
hello can u help me please? write a few words about Machiavelli, Locke and how they are relevant today? John Locke is another philosopher who is considered as relevant today for some of his ideas he expressed. His writings were a great influence to the founders of United ...
Saturday, December 1, 2012 at 7:32am
Science
A 5kg stone is lifted by a rope. its acceleration is 3m/s^2. the tention of the rope is ...
Saturday, December 1, 2012 at 5:50am
Science
A box of 5 kg mass slides horizontally on the floor for along a distance 9m in 3s due to a constant force. The magnitude of the constant force is ...
Saturday, December 1, 2012 at 5:41am
Science
A hirozontal force F works on a body of mass m1 and accelerates it by 5m/s^2. The same magnitude of horizontal force is exerted to another body of mass m2, which accerelates it by 2m/s^2. If m1 and m2 are combined, the acceleration provided by the force F is ...
Saturday, December 1, 2012 at 5:24am
science
what is the meaning of fertilization?
Saturday, December 1, 2012 at 2:00am
programming
There are several types of room in a hotel. The HotelRoom Class of Previous Programming Problem was not specific regarding the type of room. Assume that a hotel has guest rooms and meeting rooms. Modify the HotelRoom class as follows: remove the capacity and status instance ...
Friday, November 30, 2012 at 4:21pm
science, chemistry
Separate this redox reaction into its component half-reactions. O2+2Cu---->2CuO thought it was: Oxidation 2e-+O2---->2O(-2) Reduction Cu---->Cu(2+)-2e- but this is wrong
Friday, November 30, 2012 at 2:34pm
science
1.Leeuwenhoek’s invention of the _____ made the development of the cell theory possible. * telescope * microscope * cork * magnified glass 2. Chlorophyll can be found in organelles called______. * amino acids * chloroplasts * Golgi bodies * ribosomes Here Is My Answer: By...
Friday, November 30, 2012 at 2:21pm
SAT Essay
Mainly directed to Mr. Pursley and Write Teacher but feel free to critique! Thank you so much. Assignment: Do you think that ease does not challenge us and that we need adversity to help us discover who we are? Plan and write an essay in which you develop your point of view on...
Friday, November 30, 2012 at 9:49am
science
speed=frequencyxwavelengthc=f please explain
Thursday, November 29, 2012 at 10:43pm
SAT Essay
Please critique and let me know how it is and what I can improve. Thank you! Assignment: Do you think that ease does not challenge us and that we need adversity to help us discover who we are? Plan and write an essay in which you develop your point of view on this issue. ...
Thursday, November 29, 2012 at 10:13pm
7th grade science
How are cancer cells different from normal, healthy cells? How many different types of cancers are there and what causes them? What is the history of cancer? When was it first identified? What were the first treatments? What types of doctors work with cancer patients and what ...
Thursday, November 29, 2012 at 9:02pm
Physical science
A solution that contains a small amount
Thursday, November 29, 2012 at 8:52pm
Science
I need help with 2 questions please. 1.What are the three parts of the law of conservation of mass/matter? Do not need the definition but the 3 laws please. Wikipedia and other sites just gives me the definition of the law of conversation. 2. How are velocity, speed, and ...
Thursday, November 29, 2012 at 8:45pm
Science
The ripples in a certain groove 12.7 cm from the center of a 33-rpm phonograph record have a wavelength of 1.75 mm. What will be the frequency of the sound emitted?
Thursday, November 29, 2012 at 8:42pm
SCIENCE
I have 2 questions that I need help with please. 1.What are the three parts of the law of conservation of mass/matter? Do not need the definition but the 3 laws please. 2. How are velocity, speed, and acceleration related? I know how they are different only. Thank you
Thursday, November 29, 2012 at 8:06pm
Science
d) the density of gasoline is 0.703g/ml
Thursday, November 29, 2012 at 7:49pm
7th grade social studies Ms. Sue please
1. While Earth's orbit around the sun takes roughly 365 days, a single rotation of Earth takes about (1 point) 8 hours. 24 hours. 1 month. 12 months. 2. During the summer solstice in the United States, the ______ _______ is tilted farthest toward the sun. (1 point) ...
Thursday, November 29, 2012 at 6:44pm
science
what needs to go out of a cell
Thursday, November 29, 2012 at 6:22pm
science
15.0g of potassium acetate is added to 500.0mL of 0.50M solution of acetic acid. What is the pH and the pOH of the solution?
Thursday, November 29, 2012 at 4:29pm
science
How much sugar must be added to 50g of water to make a saturated solution at 0 degrees?!
Thursday, November 29, 2012 at 4:02pm
earth science
what would be the chart to use for carbon 14 whcih has a half life of 5730 years and a piece of wood which originally has 12 grams pf radioactive isotope; If the half lives occurred and now has 0.75 grams left?
Thursday, November 29, 2012 at 3:46pm
earth science
if carbon 14 has a half life of 24 days how much would be left of 220 gram sample after 168 days
Thursday, November 29, 2012 at 3:43pm
earth science
if carbon 14 has a half life of 24 days how much would be left of 220 gram sample after 168 days
Thursday, November 29, 2012 at 3:43pm
earth science
if carbon 14 has a half life of 24 days how much would be left of 220 gram sample after 168 days
Thursday, November 29, 2012 at 3:43pm
science
A tall volcano, sometimes as high as 10,000 feet, composed of lava, ash, and other volcanic material and that can have explosive eruptions is best known as a ___________________.?
Thursday, November 29, 2012 at 2:55pm
science
What does it mean to be a successful organism? Is bacteria the most successful organisms on earth?
Thursday, November 29, 2012 at 1:56pm
science
Which example below provides a complete scientific description of an object in motion? A. The marble changed position quickly. B. The car traveled north. C. The marble moved 30 cm north in 6 seconds. D. The ball rolled 20 cm in 5 seconds.
Thursday, November 29, 2012 at 11:20am
science
HELP FAST!!!!!!!!!!!!!!!! If you see that a hot-air balloon is rising above the top of a hill, what is the top of the hill called? A. delta point B. distance system C. coordinate system D. reference point
Thursday, November 29, 2012 at 11:11am
science
Help fast please!!!!!!!!!!!!!!! Which of these is the best example of translational motion? A. a coin spinning on a desk B. a leaf blowing across the field C. a car in a parking lot with its engine running D. a ballerina standing on one foot
Thursday, November 29, 2012 at 11:01am
science
Illnesses such as malaria, yellow fever, and sleeping sickness are transmitted by
Thursday, November 29, 2012 at 10:00am
Physics
A science student riding on a flatcar of a train moving at a constant speed of a 9.70 m/s throws a ball toward the caboose along a path that the student judges as making an initial angle of 45.0◦ with the horizontal. The teacher, who is standing on the ground ...
Thursday, November 29, 2012 at 8:56am
SCIENCE HELP ME
CAN ANYBODY EXPLAIN A VIRUS IN ACTION TO ME CHLAERLY LIKE THE STEPS PLZ I REALLY WOULD LVE THAT ;)
Thursday, November 29, 2012 at 5:37am
science
How many grams of citric acid is needed to titrate 20ml NaOH 0.05M their mole ratio is 1:3 respectively
Wednesday, November 28, 2012 at 11:17pm
science
A 2.24 kg mass on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.45 N/m. The mass is displaced 3.06 m to the right from its equilibrium position and then released, which initiates simple harmonic motion. What is the ...
Wednesday, November 28, 2012 at 8:50pm
science
i still don't know what to do for my science fair please help thank you justin
Wednesday, November 28, 2012 at 6:57pm
science
can you please tell me which catergory these belong in chemical or physical property? 1. arrangement of particles have changed 2. absorb or release. energy(endothermic/exothermic reactions) 3. change in appearance only. 4. cant be undone. 5. size and shape may change
Wednesday, November 28, 2012 at 6:16pm
science
PLEASE HELP I NEED A GOOD SCIENCE FAIR PROJECT. PLEASE HELP THANK YOU JUSTIN
Wednesday, November 28, 2012 at 5:29pm
sciene taking the G.E.D.
I study my science for The test but I am only score 39 what can I do to bring up my pooint I fell it twice.
Wednesday, November 28, 2012 at 3:49pm
Physical science
A cross country runner runs 12km in 41 minutes. What is his average speed?
Wednesday, November 28, 2012 at 3:06pm
science
can you unscramble the following letters to name a six legged animal pergorsaph
Wednesday, November 28, 2012 at 11:08am
science
unscramble pergorsaph to make a six legged animal
Wednesday, November 28, 2012 at 9:49am
science
0.042g of Magnesium was reacted with excess HCl at S.T.P. A. Write the equation for the reaction B. How many moles of Mg were used? C. What volume of Hydrogen is produced in this reaction?_
Wednesday, November 28, 2012 at 9:30am
Science
A boat is sailing 42 km/hr upstream on a river that is moving at 16 km/hr downstream. What is the velocity of the sailboat.....can you show me the formula too...not understanding this
Wednesday, November 28, 2012 at 12:50am
science/math
write and solve an algebraic equation to find the original mass of the sample of the radioactive isotope uranium -235, which has a half-life of 704 million years your sample is about 700 million years old and weighs 120 grams
Tuesday, November 27, 2012 at 11:55pm
To Ms. Sue or any other teachers on Jiskha
Can some one please help with with my science post because I'm struggling.
Tuesday, November 27, 2012 at 9:05pm
science
what is the alelles for 3 tall plants and 1 short plant that are offsprings and have both tall parent plants?
Tuesday, November 27, 2012 at 8:41pm
science
what is the alelles of a tall plant.
Tuesday, November 27, 2012 at 8:40pm
Science 8R - help
How does the Law of conservation of energy compared to the conservation of matter? please help
Tuesday, November 27, 2012 at 8:22pm
science
What is the alleles of pea pot parents and the possible allele combinations of the offspring. Both parents are tall and 3 offsprings are tall while the other one is short. I don't get this! Please help! Thanks!!
Tuesday, November 27, 2012 at 8:10pm
science
In cattle, red hair and white hair are codominant. Cattle with both white hair and red hair are what? please help! thanks!
Tuesday, November 27, 2012 at 8:07pm
science
Mendel realized that the principles of probability could be used to _______ the results of genetic crosses. What's the blank? please help! thanks a bunch!
Tuesday, November 27, 2012 at 8:04pm
science
If you toss a coin five times and it lands heads up each time, can you expect the coin to land heads up on the sixth toss? Explain. Please help! Thanks!
Tuesday, November 27, 2012 at 8:01pm
science
3. Describe each stage of the flow of information starting with DNA and ending with a trait
Tuesday, November 27, 2012 at 6:04pm
science
The force that every mass exerts on every other mass is called _________. A. gravity B. pull C. matter D. weight
Tuesday, November 27, 2012 at 5:34pm
Science
What fraction of the thickness of the thickest continental crust is the thickness of the oceanic crust? Give your answer as a reduced fraction.
Tuesday, November 27, 2012 at 5:24pm
science
what happens to a liquid when it releases enough energy?
Tuesday, November 27, 2012 at 5:18pm
Science
Can you explain tectonic plates?
Tuesday, November 27, 2012 at 4:20pm
Social Studies
Who organized trade in medieval cities and towns? (2 points) guilds clergy knights journeymen 2. What is a fief? (2 points) a ruler of the Franks a ruler in Charlemagne's empire land given in exchange for loyalty a Viking warrior 3. Christians and Muslims wanted to control...
Tuesday, November 27, 2012 at 3:09pm
science
The major advantage provided by worms to a lawn is
Tuesday, November 27, 2012 at 10:38am
Science
In a hydrate, what source or error would cause the value of x to be lower than its actual value?
Monday, November 26, 2012 at 10:08pm
science
What is energy flow? Why is it important? (Use the cow as your example)
Monday, November 26, 2012 at 9:49pm
Science
A car speeds over the top of a hill. If the radius of curvature of the hill at the top is 14.27 m, how fast can the car be traveling and maintain constant contact with the ground?
Monday, November 26, 2012 at 8:53pm
Science 8R - help (please read!!!)
Homework - Pick 4 out of the 6 forms (types) of energy and gives an example of each from your house. Types/Forms of Energy 1. Mechanical Energy 2. Electrical Energy 3. Electromagnetic Energy 4. Heat Energy 5. Chemical Energy 6. Nuclear Energy I'm picking heat and ...
Monday, November 26, 2012 at 8:39pm
science
a glass contains 200cm3 what is the mass in the glass
Monday, November 26, 2012 at 8:31pm
Science
You are holding the axle of a bicycle wheel with radius 30 cm and mass 1.07 kg. You get the wheel spinning at a rate of 79 rpm and then stop it by pressing the tire against the pavement. You notice that it takes 1.11 s for the wheel to come to a complete stop. What is the ...
Monday, November 26, 2012 at 8:23pm
Science
At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 15.3 m, the bottom of the wheel is 3.37 m above the ground and its rim is moving at a speed of 1....
Monday, November 26, 2012 at 7:50pm
science
what is a gradient
Monday, November 26, 2012 at 7:21pm
science
Carnival mirrors make reflections look very odd. What makes the reflections in these mirrors so strange?
Monday, November 26, 2012 at 6:38pm
science
Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?
Monday, November 26, 2012 at 6:29pm
science
Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?
Monday, November 26, 2012 at 6:21pm
science
Carnival mirrors make reflection look very odd. What market the reflections in these mirrors so strange?
Monday, November 26, 2012 at 6:06pm
science
What is the molar concentration of 25cm3 hydrogen peroxide when potassium permanagate(vii) has a concentration of 0.02 mol/dm3
Monday, November 26, 2012 at 1:24am
Physical science
Physical science a 2.0g metal ball that carries a charge of 10 uC is placed into an electric field. the ball at rest at point A is accelerated to point B with a speed of 1.0 m/s. what is the electric potential difference between point A and point B?
Sunday, November 25, 2012 at 8:17pm
science
please help me i am in 4th grade and i need help on my science project. my science project is, is smiling contagious and i have no idea what to do for research and data
Sunday, November 25, 2012 at 7:59pm
science
Electrophillic addition of HCl to 2-methyl-2-propene?
Sunday, November 25, 2012 at 6:06pm
unified science
1) a bus drove 65 km/h. how far did it travel in 3 hours? 2) a bird fly at 8 m/s. how far can it travel in 10 seconds? 3) a snail can creep along at 5 cm/min. how can it travel in an hour? 4)an narrow flying at 94 m/s struck the target in 1.8 s. how far away was the target? 5...
Sunday, November 25, 2012 at 5:23pm
Science
What is the definition of Clarity?
Sunday, November 25, 2012 at 12:27pm
COMPUTER SCIENCE
Write a program that calculates and displays the total travel expenses of a businessperson on a trip. The program should have functions that ask for and return the following: The total number of days spent on the trip The time of departure on the first day of the ...
Sunday, November 25, 2012 at 10:58am
science physics 2
Sharlyn walks 5km/hr, how long will it take her to travel 15km?
Sunday, November 25, 2012 at 7:39am
science,physics
A ship is heading due north at 12km/h in a tide moving 5km/h westward. Determine the magnitude and direction of the resultant velocity of the ship?
Sunday, November 25, 2012 at 6:20am
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