Science

Recent Questions

Science disscussion
What form of pollution, if any, does each energy source cause How does the economy influence energy source choices How does location influence energy source choices

Science
Sodium is a medal and chlorine is a poisonous gas. Neither is safe to eat. However, when sodium and chlorine is combine, it produces edible table salt. What can be concluded? 1) Table salt has similar physical properties of both reactants. 2)Table salt is a metalloid with ...

Science
Which of the following equations is balanced correctly? A. 3 H20 = H2 + 3 O2 B.2 C2H2 + 5 O2 = 4 CO2 + 2 H2O C.Cl2 + 2 KBr = KCI + Br2 D. 2 C3H3 + O2 = 2 CO2 + H2O

Science
Can you help me? what iss 42.1 pounds eqaul to?

Science
Which factor impacts the possible number of ways in which different atoms can be put together? An atoms inability to share neutrons and protons. The ability of atoms to combine in unlimited ways. An atoms inability to react with all elements the same way. ***** The inability ...

English
Fill a glass with water. Cover the glass with paper. Turn the glass upside down. The water stays in the glass. 1. The outside air pressure is greater than the inside air pressure. ------------------------------------ This is about a simple science experiment. Q1) Why is 'the' ...

science
Which combination of sex chromosomes results in a male human being? 1 XX 2 YY 3 XY 4 either XX or YY is it a?

Science
The pressure P at the bottom of a swimming pool varies directly as depth of water. If the pressure is 125 paacal when the water is 2m deep ,find the pressure when it 4.5 meters deep.

Science
What is the main difference between mechanical and electromagnet waves? a)Mechanical waves involve transfer of energy; electromagnet waves do not. b)Mechanical waves require a medium to travel in; electromagnet waves do not. c)Mechanical waves have amplitude and wavelength; ...

Language Arts
7. in the biography nolan bushnell which of the following descriptions best reflects the authors feelings towards the impact of the computers on society A. computers hinder the academic performances of many students B. computers and technology promote exercise for the mind C. ...

Science
Please help check my answers 1. On a weather map, the center of the mid-latitude cyclone is labeled as an area (high/low) __________pressure. 2. On a weather map, a mid-latitude cyclone usually forms between these latitudes: A. 90 degrees and 180 degrees B. 0 degrees and 30 ...

Science please help
Most Female frogs lay their eggs in water. male frogs release their sperm into the water to fertilize the eggs, this is an example of? A) internal fertilization B) external fertilization C) metamorphosis *** D) Alternation of generation Male bowerbirds spend much of there time...

Science
Calculate the kinetic energy of a 78kg sheep moving at 23m/s

Science (Plz help)
So, the question is, what environmental pressures from the past were most important in shaping the human species as it exists today?? Oddly, for this, my teacher only gave us one link, and i've gone over it a number of times, and haven't found where it talks about this.... ...

science
As a reseacher and as a student of Malthus' theory, you would be surprised to discover that as the standard of living increases: (A) the birth rates remains stable (B) birth and death rats fluctuate, sometimes increasing and sometimes decreasing. (c) birth rates decline for ...

science
when corporations speak of ___ they are refusing to take responsibility for water pollution, air pollution, and other kinds of ecological damages. (a) externalities (b) operational contingencies (c) social contingencies (d) externalization

chemistry (science)
The addition of 50mL of 2.02 M NaOH to 50 mL of 2.00 M HNO3 at 22.0 degree celsius resulted in maximum temperature of 36.1 degree celsius with a total mass of the solution of 100.0 g. calculate molar heat of neutralization and compare it to the results calculated from hess's ...

5th grade science
Can you check this question? 7. Which of the following is an instinctive behavior that an organism can inherit from its parents? a. a raccoon taking lids off trash cans to find food. b. a dog barking loudly when doorbell rings c. a seal balancing a ball on the end of its nose...

Science 8
Why is sugar more soluble in water than in canola oil?????????plz help

Science
When a car is driving forward on a horizontal road what is the direction of the frictional force on the tires?? The answer is forward on all tires, but how is this correct?

Computer science
Show that L2 = {a^n b^m c^max(n,m) d^min(n,m)} | m, n ≥ 0} ∈/ Context Free

Science
Who came first the egg or the hen? Please Justify

science
What is the energy of light (in J) emitted by a hydrogen atom when an electron relaxes from the 7 energy level to the 5 energy level?

Science
Is isometric the crystal of magnetite????? How else do I say that? Someone please answer because I need it for my poster and nobody answered it last time

science URGENT!!
The diagram that was given was really confusing. I need help with the following questions: 1)Polar Easterlies in the Northern Hemisphere blow from? a.)west to east b.)east to west c.)north to south d.)south to north 2) Westerlies in the Northern Hemisphere blow from? a.)west ...

Science
Is isometric the crystal type in magnetite? How else can I say that because I don't trust Wikipedia and I can't find anything much there

Science
What type of crystals does magnetite have? What fracture does magnetite have?

science
A stones drops from the edge of the roof .it passes a window2.5m high in 0.1s.how far is the roof above the top of the window?

Science
How can you purify a water using only materials at home? How will you know if it is purified or not?

Science
Suppose a mutation occurs in the gene for a particular aminoacyl-tRNA synthetase. The mutation changes which amino acid is recognized, without affecting which tRNA molecule is recognized. How is this likely to affect protein synthesis?Find all that apply. It will change the ...

Science/ Math
A person watching the race noticed that at exactly 10:05 am a ant wandered onto the snails 94-cm mark, and reached the 50-cm mark at exactly 10:06 am. What was the velocity of the ant? Is the answer 44 cm? Because v= d/t

Science
is a jellyfish bilateral symmetry? I have no idea what bilateral symmetry is, so can someone link a website where it explains what it means?

Science Help Please
Giants and dwarfs are believed to be _________ stars. a) old b) young Please help!

Science
A person who has cystic fibrosis A.inherited two normal alleles from a parent B.inherited one mutated allele and one normal allele from each parent C.inherited two mutated alleles, one from each parent D.inherited two mutated alleles from a parent

Science
A drop of oil of volume 10^10m spread out on water to make a circular film of radius 10^1m. What is the thickness of the film

Science, need help please!!
Please help me with this science, thank you!! The sun is a mid-sized, main sequence star. What stage is next in the life cycle of the sun? A red giant B blackhole C white dwarf D neutron star ------------------------ Astronomers study many different kinds of objects in our ...

science
plants that have reproductive structures called cones are

Computer Science
If a file named "myfile" has -r--r--r-- permissions.  Write the command to change it to -rwxr-xr-- permissions using both the octal and symbolic modes of the appropriate command (octal mode was included in the instructor's lecture and published on this web site in the files ...

science
a carrier is a person who has

Science
Which tool would you use to measure how long it takes a toy car to go down a ramp?

Science - Physics
A student with a mass of 66kg is rollerblading at a velocity of 7.8m/s[W] when the trail suddenly becomes very rough and as a result the student stops pushing and comes to a stop in 0.95s. Determine the net force and acceleration of the student on the rough trail. Calculate ...

Science
12. How do the cherries on a cherry tree help the plant reproduce? A. Cherries develop into seeds, which are young, undeveloped plants. B. Animals eat the cherries, which helps disperse the plant’s seeds. C. Pollen inside the cherries fertilizes ovules, which produce seeds. ...

Science
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Science
1.Which item is made from a basic ingredient? soda** wine leafy vegetables toothpaste 2.Which substances will make a salt when combined? vinegar and soda soda and wine ** detergent and ammonia ferilizer and vinegar

computer science
Which of the following statements does not contain an error? 1. string firstName= in.next(); 2. string lastName= in.nextline(); 3. system.out.print("\n"); a. 1 only b. 2 only c. 3 only d. 1 and 3 only e. 2 and 3 only is the answer 1 and 3

science
Describe how you think the length of a pendulum affects the number of swings per minute (frequency). *

Science
what will my space instruments need to do? its basically asking me what instruments I need and what they need to do for space travel, help anyone ?

Science
How would you figure the number of protons or electrons in an atom?

Agriculture
1; What is advertising 2; 5 media mean s of advertising 3; roles of science and technology in advertising 4; 5 benefits of advertising.

Science
Two identical copper spheres are separated by 1 meter in vacuum . How many electrons would have to be removed from one sphere and added to other sphere so that they now attract each other with a force 0.9 Newton?

Science+Help
Please help I don't understand how to find my calculations and this is due today The length of a football field is 100 yards. When you compare geologic time (4.6 billion years) to the length of a football field, you will find that each yard on the field will equal 46 million ...

science
Why does Earth get more energy from the sun than from all the other stars in the universe combined? BTS ARMY

science
You are given the melting points of three unknown substances and are asked to predict which one is an ionic compound. You would select the compound with the ---------- meting point. My answer is highest

computer science
Which of the following statements does not contain an error? 1. string firstName= in.next(); 2. string lastName= in.nextline(); 3. system.out.print("\n"); a. 1 only b. 2 only c. 3 only d. 1 and 3 only e. 2 and 3 only is the answer 1 and 3

Computer science
Which of the following statements does not contain an error? 1. string firstName= in.next(); 2. string lastName= in.nextline(); 3. system.out.print("\n"); a. 1 only b. 2 only c. 3 only d. 1 and 3 only e. 2 and 3 only is the answer 1 and 3

Computer Science
Which of the following statements contains an error? 1. system.out.print("/tab Age in Minutes: " + ageInMinutes +"/n"); 2. system.out.print("t/ Age in Minutes: " + ageInMinutes + "n/"); 3. system.out.print("/t Age in Minutes: " + ageInMinutes + "/n"); a. 1 only b. 2 only c. 3 ...

Science
Each mineral group has a distinct chemical feature, such as A sulfides are a metal combined with sulfur and oxygen B oxides are a metal combined with oxygen C halides are a salt combined with a metallic atom D phosphates are made of phosphate polygons

SCIENCE HELP
How long is a fish DNA?

Science
Why does pressure change with elevation and depth

Computer Science
Please suggest corrections to this code: why isn't the loop continuing ANY help is appreciated! #include <iostream> #include <iomanip> using namespace std; int main () { double slope; int yint; int x; double cord; double coordinate(int x, double slope, int yint); ...

Science
why would a piece of wood float on water and sink in methylated spirit

Science
Economic importance of noctiluca

Science
Explain how a mutation in an individual's DNA occurs, and describe the effect it may have on the individual's traits.

science
Which of the following statements describe acceleration? 1.) an object is speeding up 2.) an object is slowing down 3.) an object changing direction 4.) an object that is at rest -1 and 3 -1,2, and 3*** -all statements

science
Why are the oldest rocks on earth on continental crusts?

Science
What is the function of a cell wall? 1.to protect and sopport the cell****** 2.To perform different functions I’m each cell 3.To prevent water from passing through the cel 4.to prevent oxygen from entering the cell

Science
Which of the following distinguishes living things from nonliving things? A) Living things are made up of cells;nonliving things are not B) Living things are made up of atoms;nonliving things are not. C) Living things are made up of elements;nonliving things are not D) Living ...

Science (PLEASE ANSWER SOON)
Most bacteria are: A) Unicellular eukaryotes B) Unicellular proaryotes C) Multicellular eukaryotes D) Multicellular proaryotes

Science
2. Suppose that you swat at a bee, and it stings you. Jerking your hand away from the bee is a 1.motor neuron 2.reflex**** 3.stimulus 4.Voluntary motion

Science
If an animal is an ectotherm, it has 1.a skeleton on the outside of its body. 2.a skeleton on the inside of its body. 3.a body that regulates its own internal temperature.****** 4.a body that does not produce much internal heat.

Science
Which of the following is true regarding the organization of laminar structure in cortex? a)The output layers project only to cortical targets b)Only the input layers contain neurons c)The output layers project only to subcortical targets d) The thickness of input areas is ...

Science
A cytoarchitectonic map is a. a representation of the ways that cortical areas are connected to each other b. a map of regional differences in the laminar organization of cortex c. a map of the relation between the cortex and the thalamus d. a 19th century construct that was ...

Science
This is what the chart talks about. A Melt 1 cup of butter chop an onion mix ingredients in a large bowl B Brown the meat in a frying pan boil 6 eggs bake at 350 degrees kendra was looking at recipes in a cookbook. she divided some of the steps of a recipe into two columns. ...

Physical Science
You have a sealed glass jar full of air. If you put it in the freezer, what happens to the gas pressure in the jar??

Science
Scientific _____ involves knowledge and understanding necessary for evaluating information, making personal decisions, and taking part in public affairs. Please help!!

SCIENCE
Kirti kept a metal spoon in a glass jar filled with pickle for a few days. She observed there were holes in the spoon. What could be the reason?

science/chemistry
who understands heat release rate?

science
best way to figure peak of heat release rate

Science
Explain how sexual reproduction increases genetic diversity in many species of plants and animals, make sure to include the importance and function of gametes. PLEASE HELP!!

math.science
what is the heat release rate for a 30-m diameter gasoline pool fire?

earth science
which of the following is NOT a major component of soil a)mineral matter b)air c)humus d)earth worms 2) a soils texture is determined by a) mineral composition B)type of humans c)water content d)particle size 3)the main source of organic matter in soil is a)water b)plants*** c...

science
Lesson 10: Structures and Properties of Matter Unit Test anserws

Science
If given groups of cells, what are the characteristics that will allow us to identify prokaryotic cells from eukaryotic cells?

Science
Which physical properties are characteristic of normal solids? 1)brittle 2)little luster 3)malleable 4)ductile 5)good conductors of heat I think #1 and #2

Living Environment - Science
What are the disadvantages and advantages of individual cells cooperating and forming early multicellular organisms?

Earth Science
What would be the strongest gravitational force if an astronaut is between Earth and the Moon?

Science
How does the amount of substance affect the rate at which temperature changes? I will like someone to explain this to me, please.

science
Why do scientist us liters and milliters instead of gallons and ounces

science
What is food

science
the apparent magnitude of star is how bright they look to us we are on the earth looking up into space which would look brighter Small star Big star I think that is the big star thank you in advance

Science
How do conduction and convection differ? My answer was: Conduction requires objects to have direct physical contact, convection does not.

5th grade Science
How can two containers of water have the same temperature but different amounts of heat energy?

Vet Science
How many Pin bones does a goat have? I think 2

Science
A car of mass 800kg travels at 70km/h for 10 minutes. Find its kinetic energy

Science
Which physical properties are characteristic of metals? Choose all that apply. 1) brittle 2)high luster 3)malleable 4)ductile 5)not very reactive I think #s 2,3 and 4 Thanks

Science
Enzymes are important because they A)Contain Water B)Speed up chemical reactions C)Contain genetic material D)Help the cell maintain its shape

AP Environmental Science-Ecosystems
1. What are the physical products of cellular respiration? a. Oxygen and carbon dioxide b. Nitrogen and carbon c. Glucose and oxygen d. Glucose and water e. Water and carbon dioxide 2. If the biomass of flowers that support the butterflies was known to contain 100,000 units of...

Science
Explain the key factors that make an area a biodiversity hot spot. Include its abiotic and biotic factors

Science
In which part of the plant would you expect to find cells with the most chloroplasts? A.leaves*** B.roots C.xylem D.cambium

Science
Which part of the plant is responsible for absorbing water and nutrients? A.leaves B.stem C.roots*** D.xylem

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