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April 24, 2014

Homework Help: Science

Branches of Science

Recent Science Questions

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Science
What is the origin of volcanism?
Monday, March 3, 2014 at 4:05am

Science please help
Draw Bohr diagrams of a magnesium atom bonding with fluorine atoms. Draw atoms then electron transfer and finally the ions that form. What type of bonding occurs? Draw Bohr diagrams of 2 hyrdogen atoms bonding with an oxygen atom by sharing electrons to form a water molecule. ...
Monday, March 3, 2014 at 12:36am

Science to: DrBob222
1. Explain why the melting points of ionic compounds and molecular compounds differ? 2. A.) What laboratory procedure allows you to test a compound is ionic or molecular? b.) what results would you expect? 3. A.) What do we call the smallest particle of an element? b.) what ...
Sunday, March 2, 2014 at 10:09pm

College Chemistry - Science
In an acid-base experiment at 25.0°C, a sodium hydroxide solution was standardized against KHP. The average value for the concentration of the sodium hydroxide solution was calculated to be 0.0125 M. This solution was used to titrate the phosphoric acid present in coke. ...
Sunday, March 2, 2014 at 9:25pm

Science help
For each of the following what type of smallest particle would exist? explain your reasoning? a.) strontium B.) CaCl2 C.) CCl4 D.) SO2 E.) helium F.) bromine G.) MgO Thanks :):):):)
Sunday, March 2, 2014 at 8:49pm

Science urgent
1. Explain why the melting points of ionic compounds and molecular compounds differ? 2. A.) What laboratory procedure allows you to test a compound is ionic or molecular? b.) what results would you expect? 3. A.) What do we call the smallest particle of an element? b.) what do...
Sunday, March 2, 2014 at 8:47pm

College Chemistry - Science
At room temperature (25°C), 45 mL of a 0.002 M acid solution reacts with 30 mL of a NaOH (aq) solution (pH = 11.95), determine (through calculations) whether the acid is phosphoric acid (H3PO4), acetic acid (CH3COOH), or carbonic acid (H2CO3).
Sunday, March 2, 2014 at 7:54pm

Chemistry - Science
In an acid-base experiment at 25.0°C, a sodium hydroxide solution was standardized against KHP. The average value for the concentration of the sodium hydroxide solution was calculated to be 0.0125 M. This solution was used to titrate the phosphoric acid present in coke. ...
Sunday, March 2, 2014 at 7:49pm

Science
A gas has a volume of V1 = 550 mL. If the temperature is held constant, what volume would the gas occupy if P2 = 22 P1? Answer in units of mL
Sunday, March 2, 2014 at 6:00pm

Science
1 cup has 6/4 of water in it cup 2 has half of cup 1. What is cup 2?
Sunday, March 2, 2014 at 3:36pm

Science
In an effort to reduce global warming, individuals and companies have been buying __________________ to fund restorative projects Can someone please help me I am thinking Carbon Filters but i think that might be wrong
Sunday, March 2, 2014 at 3:17pm

Science
which property of nutrients shows that they are a type of matter? A. Nutrients are colorful B.Nutrients can do work C. Nutrients contain energy D. Nutrients have mass
Sunday, March 2, 2014 at 2:58pm

Physical Science
The air temperature on a certain day is 86 degrees F A)Convert to Celsius? B) Calculate the sound of speed in air? C)When a 653Hz tornado siren is turned on, the sound takes 2.3s to reach an observer. How far is the observer from the main siren, and what is the wavelength of ...
Sunday, March 2, 2014 at 2:34pm

Physical Science
An ultrasonic wave in water is a compression wave that travels at 1,400 m/s A) An ultrasonic wave from a ship travels to the bottom of a lake and back in 0.16s. How deep is it at this point? B) If an ultrasonic wave is emitted in the ocean where the ocean's depth is 3.5km...
Sunday, March 2, 2014 at 2:31pm

science
A copper calorimeter of mass 150g, was half filled with water of mass 300g and temperature 0 degrees celcius. 5g of ice at 0 degrees celcius was added to the content, later some quanity of steam was passed into the mixture and the temperature rose by 20 degrees celcius. ...
Sunday, March 2, 2014 at 12:44pm

science
An airplane pilot sets a compass course due west and maintains an airspeed of 225km/h . After flying for a time of 0.520h , she finds herself over a town a distance 122km west and a distance 15km south of her starting point. Part A Find the magnitude of the wind velocity. v = ...
Sunday, March 2, 2014 at 6:23am

Science
The slevator starts at 1st floor and accelerated 1m/s^2 for 6 seconds and continues at a constant velocity for 12 seconds more and is then stopped in 4 seconds with constant deceleration. If the floors are 3 meters apart at what floor does the elevator stops?
Sunday, March 2, 2014 at 5:51am

science
A man stands on the roof of a building of height 15.8m and throws a rock with a velocity of magnitude 25.2m/s at an angle of 32.7∘ above the horizontal. You can ignore air resistance. Part A Calculate the maximum height above the roof reached by the rock. y = 9....
Sunday, March 2, 2014 at 5:20am

Science
Why do you think the human brain has more convolutions than a pig brain?
Saturday, March 1, 2014 at 10:36pm

Science
In order to prevent a mass erosion event, like we experienced in 1930's Dust Bowl event, which of the following should farmers do? A.) remove worms, ants, and other organisms that live in the soil B.) Keep the land irrigated C.) remove native grasses D. plant the same crop...
Saturday, March 1, 2014 at 10:33pm

Science
What is a mountain's origin?
Saturday, March 1, 2014 at 7:16pm

Science
What would happen if you moved the bar magnets further away from the armature when the St.Louis motor was running? Please help! I have been searching for r The answer for days and can't find it anywhere Thank you
Saturday, March 1, 2014 at 6:36pm

Science
What Would Happen If We Hunted Deer Population Use Three Vocab Words HELP Ms.sue :) btw this is about the food chain
Saturday, March 1, 2014 at 2:41pm

Science
Why are generators not allowed in Niagara Falls? I am assuming that it has something to do with environment but I can't find the exact answer anywhere ?
Saturday, March 1, 2014 at 12:26pm

science
unscramble rorpsfgnloaedeasi
Saturday, March 1, 2014 at 11:39am

Science
A long jumper leaves the ground at an angle of 20 degrees above horizontal and at a speed of 11m/s..how far does he jump?
Saturday, March 1, 2014 at 3:56am

science
2. when the speakers refers to pausing " enjoyed the view / of the trees and the folwers," he really is about ( 1point ) A .looking down at the view from the mountain b. giving up the struggle to just focus on his past successes c. begin inspired by the beauty of ...
Saturday, March 1, 2014 at 12:09am

Science
What three things can be done to increase the speed and power of a St.Louis electric motor?
Friday, February 28, 2014 at 11:27pm

science
2. which of the following happens when a low - mass star runs out of fuel ? choose all that apply . ( 3points ) A ITS CORE BECOMES A WHITE DWARF B ITS OUTER LAYERS FORM a nebula , or vast cloud of gas and dust c its outer layers expand , and the star becomes a red giant d. gas...
Friday, February 28, 2014 at 10:51pm

science
.What happens to the endometrial tissue if the egg does not get fertilized ?
Friday, February 28, 2014 at 10:44pm

science
3.what hormone stimulates the thickening of the endometrial tissue? 4.Describes what occurs to the follicle around day 13 and 14 ? what is this process called ?
Friday, February 28, 2014 at 10:44pm

science
1.Approximately how long (in days)is the female reproductive cycle?? Describe the structure that is 2.illustrated at the bottom of the diagram .What is it called ?
Friday, February 28, 2014 at 10:43pm

science
Explain the difference between the ovarian cycle and the menstrual cycle ??
Friday, February 28, 2014 at 10:34pm

science
4. a scientist exams a sample of an object from the solar system . there is evidence that the object included ice . the sample most likely comes from a(n) ( 1point ) a . Asteroid b. comet c dwarf planet d meteroroid
Friday, February 28, 2014 at 9:34pm

science
Which statement is true regarding the cost of climate change adaptation discussed in the text? (Points : 1
Friday, February 28, 2014 at 9:19pm

Science
2. Which step in the nitrogen cycle is accelerated at the beginning of the eutrophication process? (1 point) A) denitrification B) nitrogen fixation C) producer uptake of nitrogen*** D) consumer decomposition Am I correct?
Friday, February 28, 2014 at 7:39pm

Science
A scientist is trying to determine the identity of an element. It is highly reactive in water and forms an ionic bond with chlorine. It is also very shiny. The element is most likely 1. from group 17 2. from group 1 3. from group 15 4. a noble gas 3?
Friday, February 28, 2014 at 2:02pm

Science
To form an oxygen molecule (O2), two oxygen atoms share two pairs of electrons. What kind of bond is shown by this? Select all which apply. Ionic Bond Single Bond Double Bond Covalent Bond Triple Bond C and D?
Friday, February 28, 2014 at 1:38pm

Science
What is true about the element francium (Fr, atomic number 87)? Choose all that apply. A) It has seven valence electrons. B) It is likely to form ionic bonds. C) It is in Period 7. D) It is nonmetal. E) It is a metal. I think it is B, C, and E?
Friday, February 28, 2014 at 12:36pm

Science please help
what do we mean when we say that atoms bond? What particles in an atom are responsible for bonding? Table sugar or sucrose is a compound that has the chemical formula C12 H22 and O11 would another chemical made of the same elements still be considered to be sucrose? why or why...
Friday, February 28, 2014 at 10:25am

science
the astronauts can live for long periods of time in a space station? my answers is yes.
Friday, February 28, 2014 at 7:53am

SCIENCE
Will someone please help me find information on facial reconstruction?
Friday, February 28, 2014 at 7:42am

Science
What would happen to an electric motor if the direction of the electric current in the armature did not change directions? Explain. I have read my textbook and googled it and I dint understand what would happen. Please help. Thank you
Friday, February 28, 2014 at 12:52am

Science 3 quick questions
what do we mean when we say that atoms bond? What particles in an atom are responsible for bonding? Table sugar or sucrose is a compound that has the chemical formula C12 H22 and O11 would another chemical made of the same elements still be considered to be sucrose? why or why...
Friday, February 28, 2014 at 12:45am

Science
1. Which of these statements is TRUE? A.The nucleus gives the cell its shape. B. Chloroplasts make food for animal cells. C. Animal cells have many different shapes. D. A plant cell can become a blood cell. C
Thursday, February 27, 2014 at 10:16pm

Science
1. Which of these is NOT made of cells? a. a rock b. an ant c. moss d. a piece of wood A
Thursday, February 27, 2014 at 9:56pm

science
why did most scientists reject wegener's theory?
Thursday, February 27, 2014 at 8:33pm

science
Explain how the concentration of hydronium ions and hydroxide ions are related to pH.
Thursday, February 27, 2014 at 7:21pm

Science
#1. Kilometers per hour describes the speed of an object. ture false **** #2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? a) an airplane flying across the sky b) a car traveling next to you at the same speed ...
Thursday, February 27, 2014 at 7:15pm

Science - Please Check my Answer 2
My problem: One runner in a relay race has a 1.50 s lead and is running at a constant speed of 3.25 m/s. The runner has 30.0 m to run before reaching the end of the track. A second runner moves in the same direction as the leader. What constant speed must the second runner ...
Thursday, February 27, 2014 at 5:59pm

Science ~CHECK ANSWERS PLEASE~
#1. Kilometers per hour describes the speed of an object. ture false **** #2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? a) an airplane flying across the sky b) a car traveling next to you at the same speed ...
Thursday, February 27, 2014 at 5:56pm

Science - Please Check my Answer
My problem: A swimmer travels from the south end to the north end of a 30.0 m pool in 15.0 s and makes the return trip to the starting position in 19.0 s. What is the average velocity for the second half of the swim? My answer: 1.60 m/s to the south Please check! I will really...
Thursday, February 27, 2014 at 5:49pm

science
true or false. Astronau eat a lot of freeze-dries food because it is lighter and takes up lees room. my answer is true.
Thursday, February 27, 2014 at 5:07pm

Science - Please Help!
How can you tell the similarity between displacement and average velocity? It is for a part of a science problem. The lesson did not tell me how to do this. I have been stuck on that problem for a while. I also had my sister help me, and I looked things up for the problem. I ...
Thursday, February 27, 2014 at 5:05pm

Science
How can you tell the similarity between displacement and average velocity? I really do not know. Please help, and I will appreciate it. :)
Thursday, February 27, 2014 at 4:26pm

PHYSICAL SCIENCE
A pound of body fat stores an amount of chemical energy equivalent to 3500 Cal. When sleeping, the average adult burns or expends about 0.45 Cal/h for every pound of body weight. How many Calories would a 179 lb person burn during 10 hours of sleep? (Note that 1 Cal = 1 kcal.)
Thursday, February 27, 2014 at 3:55pm

Science
Is planet X a Large asteroid?
Thursday, February 27, 2014 at 1:43pm

Science
Planet X is now consider a Kuiper belt object. True or False
Thursday, February 27, 2014 at 1:41pm

SCIENCE
20 . referring to the following chart , describe how the height of the tides changes from monday to the thursday 
Thursday, February 27, 2014 at 12:01pm

science
1.   Which statement is true about the following molecule?  (1 point)The molecule is composed of four atoms.The molecule contains oxygen atoms.The molecule is water.The molecule represents an element. 2.   A(n) _____________ is made up of two or ...
Thursday, February 27, 2014 at 10:29am

SCIENCE
14. under which of the following circumstances do neap tides occur? ( 1point ) A. during the new moon phrase b. when the sun’s pull is in the same direction as the moon’s pull c when the sun’s pull is at a right angle to the moon’s pull d. during the full ...
Thursday, February 27, 2014 at 9:10am

science
- Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard learning session in ...
Thursday, February 27, 2014 at 7:00am

science
1. What is the half-life of Strontium-90? Explain your answer. Honestly I don't know how to get this answer. I've looked it up and stuff, but I just found the answer not how to know what it is. A link or explanation would be greatly appreciated. Thanks.
Thursday, February 27, 2014 at 1:08am

political science
what civil liberties are protected by the Georgia Constitution?
Thursday, February 27, 2014 at 12:52am

physical science
A motorcycle starts from a standstill. In 15 seconds it reaches a velocity of 20 m/s. What is the motorcycle's average acceleration?
Wednesday, February 26, 2014 at 9:17pm

Science - Please Check This Answer
My problem is: When Christy takes her pet dog for a walk, the dog walks at a very consistent pace of 0.45 m/s. There are 20.1 m between the front of Christy’s house to the nearest dog park. How far will Christy’s dog have walked toward the park after 25 s? My answer ...
Wednesday, February 26, 2014 at 5:35pm

Science
1.   Which of the following is an example of matter?  (1 point) leaves shadows light from the sun sound 2.   Which of the following is an example of a chemical property of matter?  (1 point) ability to melt ability to freeze ability to ...
Wednesday, February 26, 2014 at 4:56pm

science
how does early operant conditioning strategies shape a person’s adult personality and if so, how
Wednesday, February 26, 2014 at 2:44pm

Environmental Science
In order to have positive or negative environmental impacts included in the GDP countries must place value on natural capital. Identify and describe one way to estimate the non-use value of natural capital.
Wednesday, February 26, 2014 at 2:21pm

SCIENCE
1. which of earth’s spheres contain most of its mass? A. atmosphere b. hydrosphere c. geosphere d. biosphere
Wednesday, February 26, 2014 at 2:13pm

Science
One gram of platinum has 3.09 × 1021 atoms, and each platinum atom has 78 electrons. How many electrons are contained in 4.00 g of platinum? The elemental charge is 1.6 × 10−19 C. Answer in units of electrons
Wednesday, February 26, 2014 at 12:49pm

Science
whats is a structure that was built with keeping costs low as the primary concern?Also, what is a structure (with the same function as the one above) that was built with no regard to cost: What are the difference between the two?
Tuesday, February 25, 2014 at 10:35pm

Science - Please check my answer
This is my problem: When Christy takes her pet dog for a walk, the dog walks at a very consistent pace of 0.45 m/s. There are 20.1 m between the front of Christy’s house to the nearest dog park. How far will Christy’s dog have walked toward the park after 25s? This ...
Tuesday, February 25, 2014 at 9:47pm

Science
Calculate the temperature found when 10kg of water at 100°C is mixed with 20kg of water at 40°C.
Tuesday, February 25, 2014 at 9:04pm

science
Vanadium has several oxidation states. write correct formulas for vanadium oxide and vanadium oxide.
Tuesday, February 25, 2014 at 8:45pm

science
Vanadium has several oxidation states. write correct formulas for vanadium (iii) oxide and vanadium (v) oxide.
Tuesday, February 25, 2014 at 8:45pm

Science
Calculate the heat required to raise the temperature of 10kg of copper from 20°C to 30°C (S.H.C. of copper = 400J/kg k).
Tuesday, February 25, 2014 at 8:26pm

Science
What are the types of position-time graphs? I really do not know the types. I have a problem that has a part that wants me to tell which graph the problem uses. Also, they didn't really talk about the types of graphs in the lesson. Please help, and will really appreciate ...
Tuesday, February 25, 2014 at 8:06pm

Science
Calculate the temperature found when 10kg of water at 100°C is mixed with 20kg of water at 40°C.
Tuesday, February 25, 2014 at 7:57pm

Science
How are volcanoes formed?
Tuesday, February 25, 2014 at 6:40pm

Science help ms sue.
Multiple Choice 1. Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) comet asteroid dwarf planet planet 2. Which of the following statements about the solar system&#...
Tuesday, February 25, 2014 at 6:14pm

Science
Which one is longer mts (metre-tonne-second) or km (kilometre)?
Tuesday, February 25, 2014 at 5:15pm

science
which of the following body systems does NOT rely on the autonomic nervous system to stimulate involuntary events? A. Skeletal System B. Digestive System C. Circulatory System D. Respiratory System
Tuesday, February 25, 2014 at 1:22pm

English
What are the subordinate clause in these sentences? 1. Brett, who is a football star, is class president. 2. Bonnie, who is an artist, is also studying computer science. 3. The composer who wrote music comes form Germany. 4. My address book, which is bright red, is gone. 5. ...
Tuesday, February 25, 2014 at 11:48am

science
whats is a structure that was built with keeping costs low as the primary concern?
Tuesday, February 25, 2014 at 11:37am

science
at what altitude the value of g becomes 3/4 of its value on the surface of earth ?
Tuesday, February 25, 2014 at 10:34am

Science
How much 0.1 M KCl is needed to dissolve 10 gm of precipitate?
Tuesday, February 25, 2014 at 1:05am

CHEMISTRY - SCIENCE
What is the molality of a solution of 50g of I2 (iodine) dissolved in 130 mL of propane. Propane density .49g/mol.
Tuesday, February 25, 2014 at 12:12am

Science
Can someone ANSWER what's the difference between exothermic and endothermic reactions?
Monday, February 24, 2014 at 11:54pm

Science Please HELP!!!
This is just a practice. Most sex-linked genes are found on?
Monday, February 24, 2014 at 8:21pm

Science
This is just a practice. Most sex-linked genes are found on?
Monday, February 24, 2014 at 8:02pm

Science
A)Could you add marbles to a beaker filled with sand and get the same results? B)How does the Particle theory model explain that a substance can be solid while having spaces between its particles? C)Why does 50 ml of water and 5oml of sugar NOT produce 100 ml of a solution ...
Monday, February 24, 2014 at 7:00pm

CHEMISTRY - SCIENCE
A solution is 42% NaCl by mass. If 314 mL of H2O was used to create the solution, calculate the , mass of salt that was used.
Monday, February 24, 2014 at 6:08pm

newton law science
A tricycle has a mass of 5.5 kg and the force needed to stop it is 1.65N. What is the acceleration?
Monday, February 24, 2014 at 6:05pm

Science
Which of these statements about saltwater is correct? a. Saltwater freezes at a lowers temperature? b. Saltwater freezes at a higher temperature c. saltwater does not freeze at any temperature d. saltwater freezing point depends on the temperate of ocean floor***
Monday, February 24, 2014 at 3:44pm

history,geograph,life science,life orentation,mathematical literacy,english
1.with my school subjects which careers can i study and the entrance requirement for the particular courses and fees and accommodation cost.
Monday, February 24, 2014 at 3:07pm

science --- grams???
hey, me again... can u please inform me of the following? its important i know this since its very hard to find on google... how long does it take to freeze 1 gram of water? and how long does it take to freeze 2 grams of water? help asap would be greatly appreciated thanx in ...
Monday, February 24, 2014 at 2:23pm

Science One Question! Help ASAP!!!
Discuss your opinion of the consequences of artificial selection and the advantages and disadvantages of using genetic information in society. Use facts from your research to support your opinion. Cite the sources for your facts. HELP ASAP!
Monday, February 24, 2014 at 1:34pm

science
A tractor pulls a tree trunk across a horizontal piece of ground.if the force in the chain is 3000N and the chain forms an angle of 30˚ with the ground,culculate the force with which the tree I'd pulled across the ground
Monday, February 24, 2014 at 8:44am

Science
How would playing a game of soccer, baseball, or basketball be different if inertia didn’t exist?
Monday, February 24, 2014 at 3:07am

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