Branches of Science
Recent Homework Questions About Science
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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
Earth Science
Develop a presentation on two ways technology has built on scientific knowledge?
Sunday, November 25, 2012 at 3:43am
Science
A 0.500 kg ice puck, moving east with a speed of 3.30 m/s, has a head-on collision with a 0.900 kg puck initially at rest. Assuming a perfectly elastic collision, (a) what will be the speed of the 0.500 kg object after the collision? (b) What will be the speed of the 0.900 kg ...
Sunday, November 25, 2012 at 3:05am
science
what is the density of carbon tetrachloride vapor at 0.975 atm and 125 celsius
Saturday, November 24, 2012 at 11:43pm
Statistics for Social Science
A random sample of 80 students at a largae school shows an average grade of 72 in Algebra with a standard deviation of 4. Find the standar error.
Saturday, November 24, 2012 at 4:25pm
science
what is the heat capacity of iron when a 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and it's temperature changes from 25 degrees celcius to 175 degrees celcius
Friday, November 23, 2012 at 11:34pm
science
Represent this reaction with balanced chemical equation. Disilane gas (Si2H6) undergoes combustion to form solid silicon dioxide and water.
Friday, November 23, 2012 at 9:59pm
Science
A solution of silver nitrate is mixed with a solution of potassium sulphide.Write the molecular,total ionic,and net ionic equations illustrating the reaction.
Friday, November 23, 2012 at 9:52pm
science
you push a friend on a sled your friend and the sled together have a mass of 70 kg if the net force is 33N what is the seld's acceleration?
Friday, November 23, 2012 at 12:03pm
Science
gyazo . com / 2350c4f09d1c4c274e519f9afb639fd4 (USE THE LINK TO ANSWER THESE QUESTIONS. REMOVE THE SPACES TO ENTER INTO THE LINK.) A:What is the genotype of the offspring? B:What is the phenotype of the offspring? C:If two individuals with the same genotype as the offspring ...
Friday, November 23, 2012 at 11:06am
science grade 8
Please, help. I need to create a comic that illustrates and explains what life would be like without 2 organ systems: muscular and digestive. I have an idea for digestive (you can live without gallbladder). I need to explain what is happening inside and outside the body, and ...
Thursday, November 22, 2012 at 7:07pm
computer science
Can you find the reason that the following pseudocode function does not return the value indicated in the comments? // The calcDiscountPrice function accepts an item’s price and // the discount percentage as arguments. It use those // values to calculate and return the ...
Wednesday, November 21, 2012 at 9:55pm
Science
Difference between mass unit and force unit.
Wednesday, November 21, 2012 at 5:44pm
Science
What do you think would happen to the rates of photosynthesis of seagrass and algae if their habitat became muddied when channel clearing caused sediment to stay mixed in with the water? Explain.
Wednesday, November 21, 2012 at 4:44pm
science
The temperature of an electronic oven is 160 °C. The temperature at the outer surface of the oven in the kitchen is 50 °C. The oven (surface area = 1.6 m2) is insulated with material that has a thickness of 0.020 m and a thermal conductivity of 0.045 J/(s m C°). ...
Wednesday, November 21, 2012 at 1:04pm
Science.
A car travels 5km to east. Then it goes 3km to north and then 2km to west. What is the displacement the car has traveled?
Wednesday, November 21, 2012 at 1:31am
science
How are mammals and fish alike
Tuesday, November 20, 2012 at 9:25pm
Science 8R - help
What's the difference between kinetic and potential energy?
Tuesday, November 20, 2012 at 9:16pm
science
a toy car is traveling .5 meters per second.It goes 3.5 seconds. how far did it travel.
Tuesday, November 20, 2012 at 8:36pm
social studys
1. 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 ...
Tuesday, November 20, 2012 at 2:51pm
Science
6. Absolute dating provides an age in years for the rocks tested. True False
Tuesday, November 20, 2012 at 1:16pm
science
which household items contain acids?
Tuesday, November 20, 2012 at 11:33am
EARTH SCIENCE
You are given a 6-month assignment by your employer to work at a remote location in Australia. In order to pack as lightly as possible, you try to research the climate of a small town in Australia. There is little data since no major cities are located within 300 miles of the ...
Monday, November 19, 2012 at 11:36pm
science
how much of naoh is required to neutralize 1500 ml of 0.1 N hcl
Monday, November 19, 2012 at 11:27pm
Earth-Space Science
what factors might affect the length of the rays after an impact?
Monday, November 19, 2012 at 10:17pm
science
Broad areas of folded rock layers that resemble a bowl turned right-side up are called _____. domes basins horsts monoclines
Monday, November 19, 2012 at 9:18pm
Google Search
Dear all, If you do not understand a science, math, writing, grammar, history, etc. problem, you can easily find the explanation of the concept you are struggling in on the internet or Google.
Monday, November 19, 2012 at 8:54pm
SCIENCE
At 35°C, K = 1.6 10-5 mol/L for the following reaction. 2 NOCl(g) 2 NO(g) + Cl2(g) Calculate the concentrations of all species at equilibrium for each of the following original mixtures. (a) 3.8 mol of pure NOCl in a 2.0-L flask NOCl ___ M NO ___M Cl2 __ M (b) 2.4 mol of ...
Monday, November 19, 2012 at 12:27am
science
A car travels 5km to east. Then it goes 3km to north and then 2km to west. What is the displacement the car has traveled?
Monday, November 19, 2012 at 12:10am
retail pharmacy assistant
1)a customer's first impression is based on the pharmacy assistants ? a)overall appearance b)grammar c)tone of voice d)vocabulary my answer is b 2)besides the dispensing of drugs,the main purpose of pharmacy today is to ? a)sell a variety of retail products b)compete with ...
Sunday, November 18, 2012 at 9:45pm
math-5
Which choice is the answer? Show me please. Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a. multiply 1/8 by 3 b. ...
Sunday, November 18, 2012 at 8:50pm
Science
as you push a lawn mower , the horizontal force is 300n, if you push the mower a distance of 500m, how much work do you do?
Sunday, November 18, 2012 at 8:49pm
math-5
Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Which method would provide the most reasonable estimate of the totaltime Tara spent on her math and science homework? a. multiply 1/8 by 3 b. multiply 1/2 by 3 c. multiply 1/3 by 3 and ...
Sunday, November 18, 2012 at 8:44pm
Science
What is the Frosted Eflin's role in the food chain?
Sunday, November 18, 2012 at 8:16pm
math-5
Tara spent 3 hours doing homework. She spent 1/3 of her time on math and 1/5 of her time on science. What is the total time Tara spent on her math and science homework?
Sunday, November 18, 2012 at 8:09pm
math
Tara spent 3 hours doing homework. She spent 1/3 of her time on math, and 1/5 on science. Estimate the total time she spent on her math and science homework?
Sunday, November 18, 2012 at 7:51pm
Science
I am studying waves and doing a project. Is the line of origin the same as a waves midpoint?
Sunday, November 18, 2012 at 5:20pm
7th grade science
Q: An igneous intrusion cuts through three layers of sedimentary rock. which rock is the youngest? and why? A: A) the igneous intrusion B) the top layer of sedimentary rock C) the middle layer of sedimentary rock D) the bottom layer of sedimentary rock
Sunday, November 18, 2012 at 1:56pm
science, chemestry
Identify which concepts/topics you believe that you will need to apply to solve the problem below. Select all that apply. Covalent Bond Energy Ionic Bond Energy Single-electron Atom Ionization Energy Multi-electron Atom Ionization Energy Electronegativity Limiting Reagent ...
Sunday, November 18, 2012 at 12:18pm
Science
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 87.0 kg of TiCl4 and 20.0...
Sunday, November 18, 2012 at 10:49am
Science
Give the value of the 1st ionization energy of beryllium (Be). Express your answer in Joules (J/atom).
Sunday, November 18, 2012 at 6:52am
Math
neha scored 75% in science,95% in maths and 70% in english. If the max. marks in these subjects were 80,100and 70,respectively. find her aggregate percentage.
Sunday, November 18, 2012 at 2:20am
physical science
a track and field athlete is running forward with a javelin at a velocity of 4.2 m/s. If he throws the javelin at a velocity relative to him of 10.3 m/s,then what is the velocity of the javelin relative to the ground? please help quick!! thanks :)
Saturday, November 17, 2012 at 11:48pm
science/math
width of a normal sheet of paper is 8.5inches. Convert this length to kilometers
Saturday, November 17, 2012 at 10:10pm
SCIENCE URGENT!!!!
I had posted these questions before but no one helped me so ill repeat the questions: Please Help Me :) 1. would karyotypes from the same family look similar? Explain. 2. Provide one reason as to why it would be useful to compare karyotypes of family
Saturday, November 17, 2012 at 7:38pm
science
what do oxygen and sugars do in photosynthesis
Saturday, November 17, 2012 at 6:05pm
Science URGENT!
I relly need help on these questions please help me :) 1. would karyotypes from the same family look similar? Explain. 2. Provide one reason as to why it would be useful to compare karyotypes of family members. 3.
Saturday, November 17, 2012 at 4:30pm
Physics
In Larry Niven’s science fiction novel Ringworld, a ring of material of radius 1.54 × 1011 m rotates about a star with a ro- tational speed of 1.38 × 106 m/s. The inhab- itants of this ring world experience a normal contact force ~n. Acting alone, this normal ...
Saturday, November 17, 2012 at 11:02am
intergrated science
Explain why ionic compounds are formed when a metal from the left side of the periodic table reacts with a nonmetal from the right side. Give two examples of such compounds
Saturday, November 17, 2012 at 7:37am
science
Sulfur vapor is analyzed by photoelectron spectroscopy (PES). Measurements determine that photoelectrons associated with the 1st ionization energy of sulfur move with de Broglie wavelength λ=3.591 A˚. What is the maximum wavelength (in meters) of radiation capable of...
Saturday, November 17, 2012 at 7:24am
science
Titanium (Ti) can be produced by the reaction of metallic sodium (Na) with titanium tetrachloride vapor (TiCl4). The byproduct of this reaction is sodium chloride (NaCl). Calculate the amount of titanium produced (in kg) when a reactor is charged with 61.0 kg of TiCl4 and 14.0...
Saturday, November 17, 2012 at 7:23am
science
Give the value of the 1st ionization energy of beryllium (Be). Express your answer in Joules (J/atom).
Saturday, November 17, 2012 at 7:20am
science (physics) IV
anton plan that he can throw at a dart board from a distance of 2 meters and hit the 5 centimeters wide bull's eye if he throw the dart horizontally with a speed of 20 meters per second. he start the throw at the height as the top of bull's eye ,will anton hit the bull...
Saturday, November 17, 2012 at 6:36am
science
Find the depth in an ocean at which a bubble of air have one forth the volume as it have on the surface of osean
Saturday, November 17, 2012 at 3:57am
science
A bullet with a mass of 7.11 g and a speed of 774 m/s penetrates a tree horizontally to a depth of 1.85 cm. Assume that a constant frictional force stops the bullet. Calculate the magnitude of this frictional force. Try energy considerations. Answer in units of N
Friday, November 16, 2012 at 11:10pm
science
An outfielder throws a 1.88 kg baseball at a speed of 57 m/s and an initial angle of 10.2. What is the kinetic energy of the ball at the highest point of its motion? Answer in units of J
Friday, November 16, 2012 at 10:48pm
science
It takes 3.38 J of work to stretch a Hooke’s-law spring 5.63 cm from its unstressed length. How much the extra work is required to stretch it an additional 4.22 cm? Answer in units of J
Friday, November 16, 2012 at 10:38pm
science
Estimate the 4th ionization energy of beryllium (Be). Express your answer in Joules (J/atom).
Friday, November 16, 2012 at 10:11pm
phy science
A wave has a speed of 230 m/s and a frequency of 25 Hz. What is its wavelength?
Friday, November 16, 2012 at 7:56pm
Science
How do I balance a combustion equation? (PLEASE TELL ME ANY SHORTCUTS)
Friday, November 16, 2012 at 4:22pm
science
According to the principle of superposition, in a stack of undisturbed sedimentary rocks, the oldest rocks are _____. Gaps in rock layers are called ____. Which of the following is not a type of unconformity?
Friday, November 16, 2012 at 11:05am
Science
What is the power of a 900 n force applied over a distance of 40 m for 45 sec? What is the horsepower?
Friday, November 16, 2012 at 9:59am
physical science
if 34,560 j of work was done with a force of 960 n, how far was the object moved?
Friday, November 16, 2012 at 9:58am
Science Math
2) How much force was used to move a box 42m if 13,734 J of work was done on it? 3)If the same amount of work was dodne as in problem #2, and the force on the box was 121 N, how far would the box be moved?
Friday, November 16, 2012 at 9:53am
Science
How much force was used to move a box 42m if 13,734 J of work was done on it?
Friday, November 16, 2012 at 9:51am
science
At temperatures above 930 degrees Celsius, lead oxide (PbO) reduces lead sulfide (PbS) to form metallic lead (Pb) and sulfur dioxide (SO2). Write out the balanced chemical equation, using the smallest whole-number coefficients.
Friday, November 16, 2012 at 8:25am
science
ICl2F+2: Calculate the maximum wavelength of electromagnetic radiation that is capable of breaking the weakest bond. Express your answer in meters. Bond energies (kJ/mol) are: I-I (150) F-F (160) Cl-Cl (240)
Friday, November 16, 2012 at 8:23am
science
for the emission spectrum of Be3+, calculate the lowest wavenumber νˉ (in inverse meters) of light produced by electron transitions between n=2, n=3, and n=4.
Friday, November 16, 2012 at 6:35am
science
estimate the change in energy when solid rubidium reacts with gaseous diatomic chlorine molecules. Express your answer in units of kJ/mole
Friday, November 16, 2012 at 6:21am
help me pls :(
1. m – 7 < 6 (1 point)m < –13 m < 1 m < –1 m < 13 2. n – 8 > 5 (1 point)n > 13 n > 3 n > –3 n > –13 3. p + 5 < 10 (1 point)p < –15 p < 5 p < 15 p < –5 4. The science class is taking a trip to ...
Thursday, November 15, 2012 at 10:44pm
science
Jai-Anna, who has a mass of 45 kilograms, climbed 3 meters up a ladder to rescue her cat from a tree. How much work against gravity did she do?
Thursday, November 15, 2012 at 10:04pm
Science 7 HELP!!!!
1. violent storms usually form along? 2. areas of low pressure usually have? 3.what does figure 5-2A show? ps Connexus quiz!! 4. which of the following explains what is happening in figure 5-2B? 5.tornadoes can form when wind at different ? blows in a different directions and...
Thursday, November 15, 2012 at 7:50pm
science
what will cold air moving over a warm body of water create? A)a rain shadow affect B)lake effect snow C)an urban heat island D)higher temp. My answer is B, am i right of not please tell me your answer
Thursday, November 15, 2012 at 7:47pm
7th grade science Ms. Sue please
1. What steps in meiosis are similar to steps of mitosis? (1 point) meiosis I prophase meiosis I anaphase meiosis I metaphase all of the above 2. A cell that has two of every kind of chromosome is _____. (1 point) haploid diploid an egg a sperm 3. Haploid numbers of ...
Thursday, November 15, 2012 at 6:23pm
science
Imagine the bird is sitting on the post in the water. If the portion of the wave bewteen 2 crests passes the post every scond what is the speed of the wave ?
Thursday, November 15, 2012 at 5:42pm
Last science question
2. 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__________. cindercone volcano composite volcano shield volcano all of the above
Thursday, November 15, 2012 at 5:24pm
Science growth
Which of the following statements best describes the response of finches to drought on the Galapagos Islands? During drought, individual finches saw that large, hard seeds were the only available food. To crack these harder seeds, individual finches grew their beaks larger, ...
Thursday, November 15, 2012 at 5:18pm
Science
Maddy hits a golf ball up into the air with an initial velocity of (20m/s, 49m/s). Record the horizontal velocity, & vertical velocity at each second for 10 seconds.
Thursday, November 15, 2012 at 5:02pm
Science questions
A few questions I have about darwin and evolution/fossils. Thx!! Why did Darwin call species like the coelacanth living fossils? On a branching tree diagram, where would the coelacanths be placed? What can animals... no species like the coelacanth tell people about the past? ...
Thursday, November 15, 2012 at 2:59pm
Science
Before the test, I had a 97 average. I got a 92 on the test. What would my average an my grade be?
Thursday, November 15, 2012 at 1:52pm
science
What is the acceleration of a 50kg person is pushed with a force of 4N
Thursday, November 15, 2012 at 12:20pm
science
My apology. I posted the previous question in correctly. Here is the question again: To bring 100cc of water from 20C to 75C, in 1min 25 sec, with 650Watt of energy input, what is the temperature required?
Thursday, November 15, 2012 at 3:48am
Science
if 500Watt of energy is supplied, how long does it take to heat up 100 cc of water from 20C to 75C? Thank you for your assistance,
Thursday, November 15, 2012 at 3:40am
Science
How do connective tissue cells differ from nerve cells
Thursday, November 15, 2012 at 12:56am
science
15. Two 5 dm3 flasks are connected by by a narrow tube of negligible volume. Initially the two flasks are both at 27 oC and contain a total of 2 moles of an ideal gas. One flask is heated to a uniform temperature of 127 oC while the other is kept at 27 oC. Assuming their ...
Wednesday, November 14, 2012 at 10:34pm
Science
What is the scientific name of tiger
Wednesday, November 14, 2012 at 10:06pm
Science 8R - help!!!!!!!!!!!!!!!!! (anyone????)
Homework - Draw a graduated cylinder with different liquids in it (different colors) and different densities. Write the densities next to the liquid. What kind of liquid???? How will I know the densities???? What's the color of the liquid???? please help me *****look I'...
Wednesday, November 14, 2012 at 8:32pm
science
what is a form of energy that is always transferred from a warmer substance to a cooler one?
Wednesday, November 14, 2012 at 8:31pm
Science
How can knowing about the chemical properties of different elements help a society become more sustainable?
Wednesday, November 14, 2012 at 8:20pm
science
How to do a analogy of a cell compared to tissue.
Wednesday, November 14, 2012 at 8:15pm
Science 8R - Ms. Sue Please Help!!!!
Homework - Draw a picture of an atom is there any pictures of an atom I can easily draw, please help
Wednesday, November 14, 2012 at 7:53pm
Science 8R - help
Homework - Draw a graduated cylinder with different liquids in it (different colors) and different densities. Write the densities next to the liquid. What kind of liquid???? How will I know the densities???? What's the color of the liquid???? please help me
Wednesday, November 14, 2012 at 7:50pm
Science and Math Combined
Can someone please help me understand how I figure out how much electricity I used when using a small appliance (lets say 300 watts. For the duration of 3 hours? Does anyone know the formula to figure this out?
Wednesday, November 14, 2012 at 7:33pm
Science
Intensity of the HeNe laser (lambda = 632nm) was measured at 2 distances: 1m and 200m from the laser. The meter reading was 10W and 1W correspondingly. How many photons/sec will enter your eye if you look into the laser from 1m? From 2m? Assume that radius of the pupil was 2....
Wednesday, November 14, 2012 at 6:33pm
Science
Chl has an absorbance peak at 435nm (Soret band) and a peak at 665nm (Qytransition). Calculate the energy gap (in Joules) between the ground and excited states of these two transitions.
Wednesday, November 14, 2012 at 6:31pm
Science
Why are pi and pi* (anti-pi) transitions on conjugated double bonds such good absorbers of visible light?
Wednesday, November 14, 2012 at 6:29pm
Science
A car of mass 1190 kg is on an icy driveway inclined at an angle of 28◦ If the incline is frictionless, what is the acceleration of the car?
Wednesday, November 14, 2012 at 6:27pm
Science
Does boron react with anything?
Wednesday, November 14, 2012 at 5:58pm
Science
If a dog chases a cat and the cat ran faster up a flight of stairs, can you conclude that the cat has more power.
Wednesday, November 14, 2012 at 4:39pm
Science
Use the terms atom and element to explain what makes silver and gold different
Wednesday, November 14, 2012 at 4:17pm
science
A cart rolling down an incline for 5.0 seconds has an acceleration of 4.0 m/s. If the cart has a beginning speed of 2.0 m/s, what is its speed?
Wednesday, November 14, 2012 at 6:41am
science
if a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? formula
Wednesday, November 14, 2012 at 6:40am
science
if a car can go from 0 to 60 mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? formula
Wednesday, November 14, 2012 at 6:40am
Science 8R - help
Homework - Look around your house and give an example of each phase of matter phase of matter is gas, liquid, and solid????? right???
Tuesday, November 13, 2012 at 8:38pm
Science
I need help with static electricity and generating current electricity.
Tuesday, November 13, 2012 at 7:46pm
Science Help!
A light beam has a frequency of 5 x 1015 Hz. What is its wavelength?
Tuesday, November 13, 2012 at 7:23pm
science
summerize how isostatic adjustments affect isostasy
Tuesday, November 13, 2012 at 7:13pm
science
what is an artery thattakes the oxygen rich blood to the rest of the body from the heart
Tuesday, November 13, 2012 at 6:10pm
Science
1. A certain radar installation transmits electromagnetic radiation with a wavelength of 2.5 cm. What is the frequency of this radiation? 2. For the radar above, how many seconds will it take for a signal to reach an airplane 15 km away, and return to the radar installation
Tuesday, November 13, 2012 at 5:20pm
Physical Science Need Help Please!
A light beam has a frequency of 5 x 1015 Hz. What is its wavelength?
Tuesday, November 13, 2012 at 5:15pm
science
FORGET IT I WILL ASK SOMEONE ELSE:(
Tuesday, November 13, 2012 at 4:50pm
science
whats silicons biggest isotope and which one is the smallest?
Tuesday, November 13, 2012 at 4:33pm
science
1.)A sample of ammonium nitrate contains 70 g of nitrogen.what is the mass of the sample? 2.)no. of gram atom of ca in 100 g of caco3(mol.wt. of caco3=100g)
Tuesday, November 13, 2012 at 2:42am
Science
I have been thinking of something to do for my schools science fair for weeks and my teacher keeps telling me that i can't do my idea because its too easy for an honors student. I'm all out of ideas and I need help! Please!
Monday, November 12, 2012 at 9:37pm
science
What are two organisms interacting with abiotic factors in the mono lake ecosystem?
Monday, November 12, 2012 at 7:54pm
science
How would your results have differed if you had over-titrated, i.e. added NaOH beyond the endpoint?
Monday, November 12, 2012 at 7:45pm
Education
Which of the following statements about the field of child development is correct? A. It’s devoted to understanding human constancy and change over the lifespan. B. It’s part of a larger, interdisciplinary field known as developmental science. C. It focuses primarily...
Monday, November 12, 2012 at 7:13pm
English 8R - Homework Check
Last week in class we watch this movie Stand and Deliver (I hope most of you are familiar with this movie), it's base on a true story. For homework I have pick one of the following questions she gave us and write a well developed response that fully develops my ideas and ...
Monday, November 12, 2012 at 5:48pm
elementary
Hi, please help me .i don't have how to prepare that science project.how to make dolphins.how to prepare that project.can u please suggest me.
Monday, November 12, 2012 at 12:33pm
science
3. Which is a model of feeding relationships? (1 point) protein building food map food web sugar molecules
Monday, November 12, 2012 at 11:58am
science
why are some foods spicyer than others?
Monday, November 12, 2012 at 11:16am
science
Explain the Nitrogen cycle
Sunday, November 11, 2012 at 9:46pm
statistics
For which of the following situations would a repeated-measures research design be appropriate? a. comparing mathematical skills for girls versus boys at age 10 b. comparing pain tolerance with and without acupuncture needles c. comparing self-esteem for students who ...
Sunday, November 11, 2012 at 9:13pm
science
What is meant by depassivation of reinforcement? State the two main chemical attacks that lead to depassivation
Sunday, November 11, 2012 at 8:56pm
Earth Science
Explain the Earth's Cabon Cycle
Sunday, November 11, 2012 at 7:21pm
science
how much skin covers 1 of your alveoli?
Sunday, November 11, 2012 at 2:08pm
science
How much heat must a gram of water at 15°C lose to turn into ice at 0°C?
Sunday, November 11, 2012 at 1:00pm
science
What does chlorophyll do for plants?
Saturday, November 10, 2012 at 9:21pm
physical science
A birthday candle 4 cm high is 10 cm from a converging lens whose focal length is 15 cm. Use a ray diagram on a suitable scale to find the location of the image, its height, and whether it is erect or inverted, real or virtual.
Saturday, November 10, 2012 at 5:14pm
science
About 70% of the human population can taste the bitter chemical phenylthiocarbamide (PTC), which is found in foods like broccoli. The allele, T, for tasting PTC is dominant over the allele, t, for not tasting it. Calculate the allele frequencies using the Hardy-Weinberg ...
Saturday, November 10, 2012 at 1:58pm
Science
Is this correct? In pea plants, the allele for green pods is G. The allele for yellow pods is g. In the offspring 27 (75 percent) had green pods and 9 (25 percent) had yellow pods. What are the parents genotypes? How do you know? The parents genotypes are GG and gg. Because ...
Saturday, November 10, 2012 at 10:13am
science
3. The relationship in which one species benefits and the other is unharmed is known as _____. (1 point) a niche commensalism mutualism parasitism 4. Population size is limited by all of the following except _____. (1 point) biotic factors abiotic factors competition none of ...
Saturday, November 10, 2012 at 9:54am
1 question Science check answer
4. Which is NOT a true statement? a. Not all fats are bad for you. b. Fats can increase your risk for heart disease. c. Saturated fats are liquid at room temperature. d. Unsaturated fats come mainly from plant foods. my answer is C. I that right
Friday, November 9, 2012 at 12:15pm
Biology
hi! so for science we have to make an experiment on temperature. we have to base our experiment on the given materials (which include test tubes, aluminum foil, cotton, fan) i chose a fan and I'm thinking of doing an experiment on how the strength of wind affects body ...
Friday, November 9, 2012 at 8:50am
Science
What is the wavelength of a 600Hz sound wave ( assume the speed of sound is 340 m/s )?
Friday, November 9, 2012 at 12:19am
Q&A Check Please, science 7th grade
An impulse is sent from the motor neuron to a(n) _____. sensory neuron? In the part of the inner ear called the cochlea, receptors convert sound vibrations into nerve impulses. true? Involuntary actions are controlled by the ____. spinal cord? The __________ consists of all ...
Friday, November 9, 2012 at 12:07am
7th grade science help Ms. Sue please!
1. Most of the life of any cell is spent in a period of growth called _____. (1 point) interphase prophase telophase anaphase 2. Which of these is the part of the cell that contains hereditary material? (1 point) chromosome interphase mitosis embryo 3. The final stage of ...
Thursday, November 8, 2012 at 8:17pm
physical science
what are contibutions jj tomson made to the atomic theory and the experiment he conducted to find his dicovery
Thursday, November 8, 2012 at 7:15pm
science grade 7
Because pressure sensors are found deep in the dermis, they are not able to feel the difference between a little pressure and a lot of pressure. False?
Thursday, November 8, 2012 at 4:41pm
physical science
how far was a box moved if 558.6 joules of work was done when a force 126Newtons was exerted to move the box?
Thursday, November 8, 2012 at 4:01pm
physical science
how far was a box moved if 558.6 joules of work was done when a force 126Newtons was exerted to move the box?
Thursday, November 8, 2012 at 4:01pm
Science
An echo is heard from a building 6 s after you blow the cars horn. How far away is the building?
Thursday, November 8, 2012 at 3:49pm
Physical Science
Compute the wavelength in air of ultrasound with a frequency of 50 kHz if the speed of sound is 344 m/s.
Thursday, November 8, 2012 at 3:41pm
science-please help due first thing tommorw
the same alkali(sodium hydroxide)can be found in both hair gel and oven cleaner.explain why it is safe to put hair gel on your skin, but not on oven cleaner. plz help!Be as acurate as possible and it has to be an outstanding scientific explanation.
Thursday, November 8, 2012 at 12:11pm
science
when the beaker of water is heated what will happen to the level of water in the tube. this thermometer would be no use to measure the temperature in the freezer.write 2 sentences to explain why
Thursday, November 8, 2012 at 11:39am
Science- Chemistry
How do I figure these out? A solution of sodium thiosulfate, Na2S2O3, is 0.1365 M. 29.28 mL of this solution reacts with 39.79 mL of I2 solution. What is the molarity of the I2 solution? 2(Na2S2O3) + I2↔Na2S4O6 + 2(NaI) 16.77 mL of the I2 solution from above is required...
Thursday, November 8, 2012 at 1:48am
physical science
Johniece jogs 7 feet then turns 90 degrees and jogs 2 feet. What is the distance and the displacement ?
Wednesday, November 7, 2012 at 11:09pm
science
Assume an average human cell has a cell cycle of 20 hours. Calculate how many cells there would be after 80 hours.
Wednesday, November 7, 2012 at 10:44pm
SCIENCE 9 URGENT!!
i wrote these questions before but no one helped me so im writing them again 1. a.) name the structures of the male reproductive system that sperm do not travel through. b.) what is the name given to these structures? 2. Name the other body system that the p e n i s is part of...
Wednesday, November 7, 2012 at 7:46pm
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