Saturday
May 23, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

language arts
When Louise Meyer was five years old, her mother took her to a science museum. That day, young Louise encountered her first snakes, and she's been fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to ...
Tuesday, December 2, 2014 at 12:23am

Science
Both a father and mother have dimples. Their son has dimples, but their daughter does not. Which genes, DD, Dd, or dd, does each family member have? Father and Mother= DD Son= Dd Daughter=dd
Monday, December 1, 2014 at 11:23pm

Language Arts
When Louis Meyer was five years old, her mother took her to a science museum. That day, young Louis encountered her first snakes, and she's be fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to schools...
Monday, December 1, 2014 at 8:51pm

Language Arts
When Louis Meyer was five years old, her mother took her to a science museum. That day, young Louis encountered her first snakes, and she's be fascinated with the reptiles ever since. Meyer now breeds snakes for educational programs. She takes her slinky friends to schools...
Monday, December 1, 2014 at 8:37pm

science
What is the difference between sexual reproduction and asexual reproduction?
Monday, December 1, 2014 at 7:17pm

Science.. Need help ASAP!
How is an area's topography determined? a.By using an area's longitude and latitude b.By using an area's scale c.By using an area's elevation, relief, and landforms * d.By using an area's elevation, longitude, latitude How are lakes and ponds similar? a. ...
Monday, December 1, 2014 at 6:56pm

Science
Suppose that you heated a sample of a hydrated ionic compound in a test tube. What might you expect to see inside the test tube, near the top of the test tube? Explain please i really am stumped on this question...
Monday, December 1, 2014 at 6:38pm

Science.. Need help ASAP!
How is an area's topography determined? a.By using an area's longitude and latitude b.By using an area's scale c.By using an area's elevation, relief, and landforms d.By using an area's elevation, longitude, latitude How are lakes and ponds similar? a. ...
Monday, December 1, 2014 at 6:30pm

Science.. Need help ASAP!
How is an area's topography determined? 1.By using an area's longitude and latitude 2.By using an area's scale 3.By using an area's elevation, relief, and landforms 4.By using an area's elevation, longitude, latitude How are lakes and ponds similar? 1. ...
Monday, December 1, 2014 at 5:50pm

Science IPS
A mass of 10 g of sodium nitrate is dissolved in 10cm3 of water at 80 degrees (c). As the solution is cooled, at what temperature will a precipitate first appear?
Monday, December 1, 2014 at 5:22pm

science
A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one jet right after the ...
Monday, December 1, 2014 at 5:03pm

science
can we predict when a hurricane will occur? explain. I have tried so man website and still no answer.. please help
Monday, December 1, 2014 at 4:08pm

science
when do huricanes happen??
Monday, December 1, 2014 at 3:50pm

Science
~~~~~~~~~~~~~~~~~~~~~~~~~Choices *Extra Words In The Word Box (Will Be Leftovers)* -Landfills -Limiting Factor -Non~point Source -Habitat Destruction -Stop -Migration -Biodiversity -Carbon Dioxide -Reverse -Carrying Capacity -Commensalism -Selective Cutting -Extinction -...
Monday, December 1, 2014 at 2:58pm

science
Wood fragments from the floor of a palace in Syria - Syro-Hittite period. Date: 675 ± 50 years BCE?
Monday, December 1, 2014 at 9:33am

science
An electron of mass 9.11 × 10-31 kg and charge 1.6 × 10-19 C passes through a cathode ray tube with a velocity of 3.7 × 107 m/s. It enters a magnetic field of flux density 0.47 mT at a right angle. What is the radius of curvature of the path in the magnetic ...
Monday, December 1, 2014 at 4:52am

check my science hw please.
31. Which of the following is an example of a global environmental choice? A. a student deciding to ride a bicycle to school B. a family deciding to recycle their newspapers C. a town meeting about a new nature refuge. D. nations meeting to discuss the ozone layer. I got C as ...
Sunday, November 30, 2014 at 11:12pm

check my science hw please.
30. Laws can help endangered species by prohibiting A. Captive breeding B.habitat preservation C diversity of genes D. products made from the species I got D, I have a feeling that this may be wrong.
Sunday, November 30, 2014 at 11:08pm

check my science hw please.
26. In the last few centuries, the number of species becoming extinct on Earth has A.decreased dramatically B. decreased slightly. C. increased slightly. D.increased dramatically I think it should be C.
Sunday, November 30, 2014 at 11:04pm

check my science hw please.
25. All of the following factors affect an area's biodiversity EXCEPT A. areas B.number of endangered species C. climate D. diversity of niches. I got C for my answer.
Sunday, November 30, 2014 at 10:55pm

check my science hw please.
24. can provide an economic benefit to A. drug companies B. tourists C.hikers D.endangered species I got A for my answer.
Sunday, November 30, 2014 at 10:48pm

check my science hw please.
18. Which of the following would be a cost of drilling for oil in Antarctica? A. The supply of heating fuel would be increased. B.There would be a greater opportunity to study wildlife there. C. An oil spill could harm food sources for penguins. D. Many new jobs would be ...
Sunday, November 30, 2014 at 10:46pm

science
10. One group of gases that is responsible for destroying ozone in the ozone layer is A.car exhaust fumes B.CFCs C.nitrogen oxides and sulfur oxides D. Carbon monoxide and carbon dioxide I got B for my answer.
Sunday, November 30, 2014 at 10:41pm

Physical Science
Complete and balance the equation for the following single-replacement reactions. (Use the lowest possible coefficients. Omit states-of-matter from your answer.) Ni + Cu(NO3)2(aq)-->
Sunday, November 30, 2014 at 10:12pm

science
A jellyfish can propel itself with jets of water pushed out of its bell, a flexible structure on top of its body. The elastic bell and the water it contains function as a mass-spring system, greatly increasing efficiency. Normally, the jellyfish emits one jet right after the ...
Sunday, November 30, 2014 at 6:01pm

Religion/ Social Studies/ Science
Please, someone tell me who was it that made the world. Thank you.
Sunday, November 30, 2014 at 6:00pm

science
what is pollution
Sunday, November 30, 2014 at 3:36pm

Science
A 40.0 g block of ice at -15 degrees C is dropped into a calorimeter (of negligible heat capacity) containing water at 15 degrees C. When equilibrium is reached, the final temperature is 8.0 degrees C. How much water did the calorimeter contain initially? Specific heat of ice ...
Saturday, November 29, 2014 at 10:25pm

Science
The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the total force on a(n) 94 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 60 m/s in 8.2 s? Answer in units of kN
Saturday, November 29, 2014 at 5:30pm

science
a rectangle steel block of dimension 10m multiple by 3m multiple by 2m, has mass 45kg calulate the density of the block.
Saturday, November 29, 2014 at 3:28pm

Science
For my science (biology) coursework i am doing an experiment involving photosynthesis- the cabomba experiment. I need to know 1- the variables that are controlled and why 2- what equipment is used and why PLEASE HELP... THANK YOU
Saturday, November 29, 2014 at 1:55pm

English
1. I have to do scince and math homework tonight. 2. I have to do my science and math homework. ------------ Are both grammatical? Which one is commonly used? Do you have other way of expressing?
Saturday, November 29, 2014 at 1:49am

science
an object has an electric charge of +12. it loses 10 electrons. what is the new electric charge on the object?
Friday, November 28, 2014 at 8:42am

SCIENCE
We did a radioactive decay and half life lab with m&ms and I do not understand these conclusion questions: 1. how many half lives would it take for 500 nuclei to decay to 6.25% of the original number of nuclei? My ans: 3125?- do not think that's right! 2. Is there any way ...
Thursday, November 27, 2014 at 10:15pm

Science
What volume of 0.050M sodium hydroxide is needed to react with 25cm3 of 0.068M ethanoic acid?
Wednesday, November 26, 2014 at 2:21pm

environmental Science
the entire area of land that a river drains is called
Wednesday, November 26, 2014 at 12:16pm

Environmental Science
what did Thomas Malthus believe
Wednesday, November 26, 2014 at 12:12pm

Science Help Please
Which of the following is not among the advantagees of generrating nuclear energy? A.it does not release carbon dioxide into the atmosphere B. it does not require a specialized process or involve any risk C. it does not release chemicals that cause acid rain D. it releases ...
Tuesday, November 25, 2014 at 10:52pm

science
explain how mutations in dna affect the traits of an individual
Tuesday, November 25, 2014 at 9:23pm

SCIENCE BUT I REALLY NEED HELP
genes are specific sections of ___ To pass its traits on to the next generation, organisms must ____
Tuesday, November 25, 2014 at 7:44pm

Science
This will help explain another question I have. So,what is the pattern that occurs when magnetic waves are spread out through the visible spectrum?
Tuesday, November 25, 2014 at 7:17pm

Science 1 easy question!!!!
If new information about the behavior of atoms is discovered and verified, then revisions will need to be made to the current___ My answer: Atomic model?
Tuesday, November 25, 2014 at 4:46pm

Science 1 easy question!!!!
One way the modern atomic model differs from Thomsons atomic model is that electrons are no longer scattered throughout an atoms positive matter like chocolate chips in cookie dough, instead each electron is outside of the nucleus occupying a specific ______. My answer: Orbital?
Tuesday, November 25, 2014 at 4:41pm

Science 1 easy question!!!!
Is K^+1 and F^-1 an ionic bond? My answer: yes
Tuesday, November 25, 2014 at 4:29pm

Science!
An index fossil must be? a) older than 1 billion years. b) smaller than other fossils around it. c)larger than other fossils around it. D) unique in its appearance. pleases help someone i don't really know but my best guess is a)
Tuesday, November 25, 2014 at 10:38am

science
what cause sea floor spreading
Monday, November 24, 2014 at 10:10pm

Science
2 ml of stock antibiotic (64 mg/ml) was diluted into a test tube containing 2 ml of broth (final volume is 4). A series of 2-fold SERIAL DILUTIONS were performed by transferring 2 ml to three other tubes, consecutively (final volumes now 2 ml in each tube). The final ...
Monday, November 24, 2014 at 9:27pm

science
how many moles of oxygen gas are necessary to form 0.737 moles of carbon dioxide
Monday, November 24, 2014 at 5:56pm

int.science
The earth can be considered a heat engine because it receives heat from the sun and converts it into mechanical energy to produce winds and evaporate water. True False
Monday, November 24, 2014 at 10:52am

chem/science
A piece of an aluminum can was cut into small pieces. Then 0.422 g of the chips from the can was used to prepare potassium alum according to the procedure we used. Calculate the theoretical yield (in g) of potassium alum that could be obtained in the reaction. (Alum MW=474.41 ...
Monday, November 24, 2014 at 10:09am

Int.Science/laws of thermodynamics
Watch the heat engine animation in the lesson text above. Does this animation illustrate a "new and improved" heat engine? yes no
Monday, November 24, 2014 at 8:55am

Earth Science
Describe the difference in evolution between a supercell that develops in an environment with unidirectional wind shear and a supercell that develops in an environment with veering winds. What is causing this difference in evolution? THANKS!!
Monday, November 24, 2014 at 5:47am

science
An athlete executing a long jump leaves the ground at a 27.7∘ angle and travels 7.60m.If this speed were increased by just 5.0%, how much longer would the jump be?
Sunday, November 23, 2014 at 8:05pm

Science
Which of the following electromagnetic waves is not used for communication?
Sunday, November 23, 2014 at 4:05pm

science
just being curious, why does hurricane occur?? thanks
Sunday, November 23, 2014 at 1:57pm

chemistry
The National Institute of Science and Technology (NIST) kinetics database lists the rate constant, k, of a particular gaseous reaction as 8.56× 10–10 cm3·molecule–1·s –1 at 298 K. convert to units of M-1 s-1. convert rate constant to units of...
Sunday, November 23, 2014 at 12:43pm

Science PLEASE HELP
How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
Sunday, November 23, 2014 at 12:21pm

science
What r 4 alkali's that u would find in the house????? Luv Sara xxxx
Sunday, November 23, 2014 at 12:01pm

Science
How does Exothermic and Endothermic reactions affect the rate of a reaction? Please help. I need something that will be easy for me to understand and adopt into my own words. Thank You :)
Sunday, November 23, 2014 at 11:09am

science
Rates of Reactions  I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips.  Variables:-  -Independent: the mass of marble chips  -Dependent: The volume of ...
Sunday, November 23, 2014 at 4:59am

Social Science
Where can I find information on the difference between English policing and American policing, without using wikipedeia? I found some information but is not showing a difference. Thank you
Saturday, November 22, 2014 at 9:42pm

Science
changes in the carbon cycle cause global temperatures to rise how might this affect the water cycle
Saturday, November 22, 2014 at 9:38pm

science
If there is a block of cheese with a volume of 1200 cm, and a mass of 2 kg (2000 g) what would be its mass-to-volume ratio be in g/cm3?
Saturday, November 22, 2014 at 9:12pm

science
which of the following is a characteristic of karst topography? a. caverns b. glaciers c. alluvial fans d. dunes
Saturday, November 22, 2014 at 7:30pm

computer science
What are the Control Identifiers, Domain, in the Layered Security Solution Report?
Saturday, November 22, 2014 at 7:03pm

Science
uncertainty for a tenth of a mm?
Saturday, November 22, 2014 at 12:27pm

Science
what is an uncertainty? From reading the internet, is it a way to express potential error and that the actual value is between +/-#? what would be the uncertainty for this: electronic balance measuring to the tenth of a gram? is it +/- 0.05?
Saturday, November 22, 2014 at 12:21pm

science
an object's resistance to change in motion is called is A. Density B. Inertia C. Mass D. Degrees
Friday, November 21, 2014 at 8:18pm

science
As an object get farther from earth is A. its weight increase B.it weight decrease C. it mass decrease D. it weight remains the same I am not sure but is it A(or b)
Friday, November 21, 2014 at 8:01pm

science
which of the following shows the path followed by nerve impulses in a reflex motor neurons,interneurons in brain,sensory neurons or sensory neurons,interneurons in brain, motor neurons
Friday, November 21, 2014 at 7:36pm

Science Help
Which of the following is not a goal of the clean water act? A. Controlling water pollution from point sources B. Encouraging voluntary cooperation by citizens related to nonpoint sources of pollution. C. Educating citizens about the importance of reducing pollution D. ...
Friday, November 21, 2014 at 7:11pm

science
4 answers energy flow in ecosystem?
Friday, November 21, 2014 at 7:04pm

Science Help
Which of the following statements describes the conservation od a natural resource? A. A factory burns coal to run its machines. B. A solar energy company harvests energy from sunlight. C. Lights in a house are turned off when not in use. D. A wind energy company covers a ...
Friday, November 21, 2014 at 6:46pm

Science Help
Renewable resources are considerered better for the enviorment because A. They are less expensive to harness. B. Once they are harnessed, they can be replaced. C. They do not cause any pollution. D. Using renewable resources encourages people to plant more trees. Is the answer...
Friday, November 21, 2014 at 6:36pm

Science Help
The process of desertification can occur when A. Plants usually found in the desert replace trees that have been cut down. B. Farmers use contour farming techniques. C. An area of forest is clear-cut. D. An area of forest is selectively cut. Is the answer C? Thank you
Friday, November 21, 2014 at 6:27pm

Science Help
Which of the following is not a nonrenewable resource? A. Oil B. Petroleum C. Corn D. Gasoline Is the answer A? Thank you
Friday, November 21, 2014 at 6:16pm

Science Help
Using coal for fuel releases pollution into the atmosphere. Why do people continue to use coal if it causes pollution? A. Using more coal reduces the amount of pollution from using oil. B. Using coal is realtivly inexpensive. C. Mining coal helps scientists unconver fossils. D...
Friday, November 21, 2014 at 6:13pm

Science Help
Selectively cutting down trees on an area of land can best be describes as A. Cutting down certain trees while leaving other trees standing. B. Cutting down all of the trees and smaller plants. C. Cutting down none of the trees on the land. D. Cutting down ass of the trees ...
Friday, November 21, 2014 at 6:04pm

Science- Skin
How thick is the epidermis as compared to the dermis as compared to the subcutaneous layer? Is there a comparison? If not, then how thick is the epidermis, dermis, and subcutaneous in thick skin?
Friday, November 21, 2014 at 6:02pm

science
A swimming pool measures 10m by 7m by 2m calculate the full force exerted by the water against the bottom. What is the pressure at the bottom due to the water?
Friday, November 21, 2014 at 5:15pm

Int.science
When a motor is turned on, electrical energy is transformed to mechanical energy plus heat energy. True False
Friday, November 21, 2014 at 2:17pm

Int.science/Laws of Thermodynamics
The outward evidence for this transformation can be seen only in the mechanical motion of the motor. True False
Friday, November 21, 2014 at 10:53am

Int.science/Laws of Thermodynamics
The efficiency of the engines in the two previous problems are the same, comparing the input and output temperatures. True False
Friday, November 21, 2014 at 9:20am

Earth Science - NEED HELP QUICK
What is the thickness of the layer from 1000 - 850 mb if the mean temperature of the layer is 2 C? From what it says in my textbook it seems as if mb = hPa so all you do is 850 - 1000 = -150 hPa but I am pretty sure that is wrong because what do you do with the temperature?? ...
Friday, November 21, 2014 at 8:41am

Science
2 vectors have same magnitude.The magnitude of the resultant vectors is same as either of both vectors.What is the angle between 2 vectors?
Friday, November 21, 2014 at 7:37am

science
i have BaCl2.2H2O ,how can i get BaCl2.6H2O from it. or i have CuCl2.2H2O how can i get CuCl2.6H2O from it. actually i am working in the field of nanotechnology. trying to prepare nano-ferrites. now am trying to prepare copper doped barium hexaferrites.help me if u can
Friday, November 21, 2014 at 3:08am

Earth Science
Use angular momentum arguments to describe why a parcel of air moving from the equator towards the North Pole will be deflected to the east. It may be helpful to show equations in your response. THANKS
Thursday, November 20, 2014 at 8:44pm

Science
50 ml of ethyl alcohol amd 40ml of water combined in a beaker add up to 90ml of liquid why is this? (Particle theory)
Thursday, November 20, 2014 at 8:42pm

Science/Math Question
So in school, I am doing a " planet paper roll comparison " So the scale of the diameter of one planet is 0.943cm or something.. How do I measure it on paper?
Thursday, November 20, 2014 at 8:14pm

Science
What would happen if cells didn't have the following? : -Nucleus -Ribosomes -Endoplasmic Reticulum -Cell Wall
Thursday, November 20, 2014 at 6:45pm

science
Two train cars are connected to a locomotive as shown. Wach train has a force of kinetic friction equal to 50,000N. The locomotive pulls the two freight cars at a constant speed of 4.0m/s. Find the force of tension at each of the coupling points A & B.
Thursday, November 20, 2014 at 5:13pm

Earth Science
Use angular momentum arguments to describe why a parcel of air moving from the equator towards the North Pole will be deflected to the east. It may be helpful to show equations in your response.
Thursday, November 20, 2014 at 4:58pm

5th grade science
what does the statement "the properties of salts are different from the properties of the elements"mean.
Thursday, November 20, 2014 at 4:51pm

Science help URGENT
Muscles located in the walls of the small intestine help push digested material along. Muscles located in the walls of arteries help push blood along. Based on this information and your understanding of muscle types, which of the following statements is correct? Both sets of ...
Thursday, November 20, 2014 at 4:48pm

science
any science projects??? please help!!!
Thursday, November 20, 2014 at 3:47pm

int.science gtg in 8 min.
How much heat is contained in 100 kg of water at 60.0 °C? Be mindful of significant figure rules for both multiplication and addition. 30 kcal 2.10 x 104 kcal 2.40 x 104 kcal 2.77 x 104 kcal
Thursday, November 20, 2014 at 2:22pm

Int.Science
How much energy is needed to heat and melt 3.0 kg of copper initially at 83°C? Be mindful of significant figure rules for both multiplication and addition. 450 kcal 430 kcal 280 kcal 130 kcal
Thursday, November 20, 2014 at 2:08pm

Science Help!!!!
One reason people around the world use coal as an energy source is A. It is nonrenewable B.it can be found many places C.it is a fossil fuel D. It cannot be used up Is the answer C?
Thursday, November 20, 2014 at 12:52pm

science
How do you peel a boiled egg with the shell sticking ?
Thursday, November 20, 2014 at 12:48pm

Earth Science
What two types of air masses collide to form a dry line? On which side of this boundary would you expect to see rising motion, and why?
Thursday, November 20, 2014 at 12:03pm

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