Science

Recent Questions

Science
Which sequence of process must occur for an atom of carbon to go from a car to a tree? A. respiration, decomposition B. combustion, photosynthesis C. fossilization, decomposition D. fossilization, photosynthesis

Rocket Science
Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth

science
What is the hook's law?

science
A 10 meter long seesaw has a boy of mass 20 kg sitting on one end . How far away from him should a girl of mass 30kg sit to balance the seesaw?

earth science
the Julian calendar is the calendar we currently use. True or false. my guess is true

earth science
one reason the moon might be a better place than earth to study the universe is there is almost no atmosphere. True or False MY guess is false

earth science
During the summer _________ in India, wet air from the Indian ocean brings heavy rain to India.

earth science
air pollution in pennsylvania causes ______ in new england because the wind blows the pollution into new England. can someone please help, I cant find this anywhere.

science
How can radioactive dating help determine the absolute age of a rock (or rock layer)?

science
Explain why the boiling point of ethyl alcohol (C2H5OH, 78.4 oC) is higher than the boiling point of methyl alcohol (CH3OH, 64.7 oC).

science
Consider the following reaction: CaCO3(s) --> CaO(s) + CO2(g) A mixture of calcium oxide (CaO) and calcium carbonate (CaCO3) had a mass of 15.08 g and was heated to above 840 oC. After heating, 9.83 g of solid was left. What is the mass percentage of CaCO3(s) in the ...

science
Is it bad to shave the pubic hair? Why or why not? How does shaving affects the growth of pubic hair?

science
Research suggests that American students lack a sufficient education in math and science to compete globally. How does the controversy about teaching evolution affect and reflect this problem?

Science
Name a way in which our government dictates the administration of vaccines to children.

science
Name a way in which our government dictates the administration of vaccines to children

science
1)Name one way in which our government dictates the administration of vaccines to children. 2)What were the three major outbreaks of influenza during the 20th century and how did governments understand and respond to these outbreaks?

science
How much heat in kcal must be added to 0.77 kg of water at room temperature (20°C) to raise its temperature to 50°C?

science
A 2 kw&22 heater works on domestic voltage main supply. What should be the current rating of fuse explain

life science,geography,maths lit,business studies
im going to grade11 next year and im doing those subject.Im confused! i don't know where the subject taking me to.Please help me,which jobs are related with my subjects?

science
A wire of resistance 12 ohm per metre is bent to form a complete circle of radius 10 c.m.the resistance between its two diametrically opposite point A and B

science
how are relative dating and absolute dating different

SCIENCE
The burning of fossil fuels cause the earth to get warmer by putting carbon dioxide in the atmosphere and the carbon dioxide traps heat. MY GUESS: TRUE

EARTH SCIENCE
Smog is the worst in.. A. Chicago B. New York C. Los Angles MY GUESS: C. LOS ANGLES

Earth science
TRUE OR FALSE The burning of fossil fuels cause the earth to get warmer by putting carbon dioxide in the atmosphere and the carbon dioxide traps heat. MY GUESS: TRUE Isobars help meteorologists find fronts on weather maps. MY GUESS: FALSE A CLOUD IS A COLLECTION OF WATER ...

science
15 ml of satuated solution of potassium chloride in water at 50 degrees celecius is raised to 70 degrees celecius. How much more kcl will dissolve

Science - MIT
Which of the following is a possible set of n, l, mi, and ms quantum numbers for the last electron added to form a gallium atom (Z=31)? 4,1,1,1/2

science
Blank is a major component of bones and the proteins that build muscles

science
A running back has 3500 J of kinetic energy and is running at a speed of 8 m/s. Calculate his mass.

science
is this correct? what I just sent you?

science
The various groups who make up the US public have different expectations of science. How do these differing expectations of science affect the ways groups place trust in science? Describe one example of a controversial expectation that the author gives. Resnik, D. (2011). ...

Science
If 1 J of energy is applied to lift an object of 500 kg how high will it rise?

Science
The work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h is?

Science
A ball is thrown up and attains a maximum height of 1000 m.It's initial speed was?

Science
WHY PUMICE STONE FLOAT IN WATER

physical science
For questions #14 – 16, write an equation for the reaction of magnesium oxide with sodium chloride to produce magnesium chloride and sodium oxide. 14. Show the formulas of the reactants. 15. Show the formulas of the products. 16. Write the balanced the equation for this ...

Maths lite, business, geography, life science
What carreer can I choose after matric with these subjects?

Science
How have humans observed heredity over time and how has that perception changed as major paradigm shifts in the discipline took place?

Science
Explain the concept of public trust as the author uses it. Resnik, D. (2011). Scientific Research and the Public Trust. Science & Engineering Ethics, 17(3), 399-409

Writing/Environmental science
I'm writing a thesis/research paper on how all animals play an important role on the environment. I'm trying to narrow my paper down on an endangered species but I'm having trouble deciding/thinking of a species that play IMPORTANT roles (ie.- honeybees). Except I cannot ...

science
Explain the concept of public trust as the author uses it.

Physical Science
Balancing Decay Reactions. Fill in the blank with the correct piece to balance the decay equation. 1. (184/74) W (4/2) He + _____ 2. (210/82) Pb______+ (206/80) Hg 3. (35/16) S  (0/-1) e + _______ 4. ________  (0/-1) e + (60/28) Ni My work: 5. (...

science
How have humans perceived heredity over time and how has that perception changed as major paradigm shifts in the discipline took place.

Science
In a sample of 0.65L of H2O contains 2.5×10^50 molecules.What is the density of sample of H2O?

Science
How are respiration and fermentation similar? How are they different?

Science
Can an egg or sperm be formed through mitosis?

Science
Check my answers please? Imagine that you remove all the atoms from a chair. What remains? 1. nothing 2. a pile of dust I choose 1. Which of the following is not made of atoms? 1. heat 2. a solid 3. a gas I choose 1. What about matter is true? 1. atoms are not matter but they ...

Science
What allows small particles to move through cell membranes? Is it diffusion?

Science
Which term describes a type of trait that is usually expressed only when an organism has two identical alleles for the trait? A- homozygous B- dominant C- heterozygous D- recessive My guess is A.

science
Calculate the weight of gold having specific heat capacity 0.13 joule which is heated from 25 degree c to 300 degree c, where the heat absorbed is 1500 joule?

science
NaOH + HSO -+ Which of the following is the number of moles of NaOH required to neutralize 1 mole of H2SO4 in the equation above?

science
A circular disk is rotating in a horizontal plane with a time period 3.14 second.At what distance from the center a coin of mass 10 gram may be kept so that the coin coin may remains stationary the coefficient of friction is 0.52?

Science Please Check!
Which term describes a type of trait that is usually expressed only when an organism has two identical alleles for the trait? A- homozygous B- dominant C- heterozygous D- recessive My guess is D. Please help!

science
Which of the following best describes the process of diffusion?

HEALTH
Phonology refers to the science which treats

HEALTH
Phonology refers to the science which treats A. blood disorders. B. vocal sounds. C. heart rhythms. D. nutritional deficiencies.

Science
Assume that you have 15ml of 2.5M potassium hydroxide but only have concentrated bottle of 16M strength. How would you obtain this

Math
The mean of Susan's math and science scores is 74 points. The mean of her math and English scores is 83 points. How many more points did Susan score in English than in science?

science
In the course of a short race a car does 50,000 j of work in 7s what is the power of the car during the race

Science Please Help
an illness caused by fungus

Science-Physics
A mover is pushing a crate across the floor. He exerts a force of 500 Newtons and pushes the crate a distance of 5 Meters. How much work did the mover do on the crate?

Graph Theory/ Algorithms / Computer science
I am working on this problem from the book, Data Structures & Algorithm Analysis in C++. The problem is: 9.40 Give a polynomial-time algorithm that finds ceil(V /2) vertices that collectively cover at least three-fourths (3/4) of the edges in an arbitrary undirected ...

science
uncertainties for... grams? digital balance cm? minutes? 5 minutes? milliliter (ml)?

Science
Why are liners laid down at the bottom of a landfill before waste is deposited in the landfill ?

Science
Express your opinion about dealing with antibiotic resistance you think are most important to pursue.

science 8
Waht is the reason for the seasons experiment?

science
why is it rare for the soft parts of an organism to become a fossil? a) the soft parts take a long time to decay b) the soft parts can be eaten by animals***** c) the soft parts cannot be buried in sediment d) the soft parts form petrified fossils which of the following terms ...

Science
Why are there variations in atmospheric pressure how was this proven? Why do your ear pop when trebling to different altitudes?

science 1 question
which of the following is an example of an effect of natural selection? All of the children of two parents are male. Carbon cycles through ecosystem. Favorable environmental conditions cause an increased food supply. Polar bears have white fur. Is the answer C?

Science help
1.Some plastics are made from corn. These plastics are biodegradeable. This means that plastics made from corn will (blank) than regular plastic My answer decompose faster 2. In the ocean, there are areas where there are very few living things. (Blank) is the term that ...

Science help
A (blank) is a tool used to capture the energy in sunlight. My answer Photochemical Am I right?

Science
9. If the following graph represents the decay of strontium-90 in an igneous rock, what event occurred at 0 years on the horizontal axis? There is a picture but I cant upload it. Please help me!

Science help
In the ocean, there are areas where there are very few living things. (Blank) is the term that described when this happens to a natural gas. My answrer Aquaculture Am I right?

Science help
A homeowner determined that he used 114 gallons of oil every month to heat his home in the winter. This information would be considered part of his My answer Carbon footprint Am I right?

Science help
(Blank) are nonrenewable resources that are used around the world because they are relatively inexpensive. My answer Fossil fuels Am I right?

Science Help!!!!
To solve the problem of a polluted stream a scientist traced where the pollution was coming from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of (blank) pollution ...

Science
During exercise your body's blood pressure increases as it cool down the body's blood pressure slowly returns to its normal state this is know as?

Physics
Instructions: Read the following paragraph carefully. Then use what you know about momentum, work, and energy to answer the following questions. Be sure to show your work. You are a traffic accident investigator. You have arrived at the scene of an accident. Two cars of equal ...

Science
Creativity is always discouraged in scientific endeavors. True or False. I thinks its true.

Science
The speed of light is 3 x 10 to the 8th power meters per second. If the sun is 1.5 x 10 to the 11th power meters from earth, how many seconds does it take light to reach the earth?

Science Help!!!!
1. Which of the following types of pollution cannotbe attributed to car and truck emissions? A. Acid rain B. Sedimentation C. Ozone D. Photochemical smog 2. In which of the following places is it more difficult to determine if there is pollution? A. Aquifer B. Stream C. Air D...

Science Help!!!!
1. Running the dishwasher only when it is completely full is an example of A. Increases resource use B. Using nonrenewable resources C. Using renewable resources D. Reducing resource use 2. Cotton is a plant used to make clothing. Cotton would best fit into which of the ...

Science Help!!!!
How does using coal to generate electricity affect the enviroment? A. Using more coal reduces the amount of pollution from using oil. B. Using coal improves the quality of nearby water. C. Using coal, instead od wood from trees, helps improve the inviroment. D. Using coal ...

Physical science
What is the formula of magnesium sulfate and ammonia? My work:MgSO4 + 2NH4OH --> (NH4)2SO4 + Mg(OH)2 Correct/Balance the equation below. MgSO4 + NH4OH → (NH4)2SO4 + Mg(OH)2

Science Help!!!!
Solar,wind,nuclear,and hydorelectric energy sources are similar in which of the following ways? A. They are all nonrenewable energy sources. B. They all require an indirect use of sunlight in order to make electricity. C. They are all considered alternative energy sources. D. ...

Science Help!!!!
In which of the following places is it more difficult to determine if there is pollution? A. Aquifer B. Stream C. Ajr D. Pond Is the answer d?

Science Help!!!!
Which of the following energy sources is relativelyexpensive to set up, but has a low cost once it is in place? A. Natural gas B. Coal C. Nuclear power D. Solar power Is the answer D?

Science Help!!!!
Which of the following is used to make biomass fuel? A. Coal B. Natural gas C. Plants and animal waste D. Petroleum Is the answer C?

Science Help!!!!
Which of the following is a source of photochemical smog. A. Fossil fuels B. Wind energy C. Biomass fuels D. Nuclear energy Is the answer A?

Science
I am having a very had time completing this question What and how does the cell membrane regulate? What three factors influence this process?

Science
15 ml of saturated solution of potassium chloride in water at 50 degress Celsius is raised to 70 degress Celsius. How much more kcl will dissolve?

Science
Can someone actually help me with this...? Instead of telling me to use my books... (My school does NOT give us books.!) How is incomplete dominance different than dominance? Explain why incomplete dominance only occurs in this genotype?

Science 😭
How is incomplete dominance different than dominance? Explain why incomplete dominance only occurs in this genotype?

science
how many cell divisions would it take to produce at least 1000 cells from one Cell?

science
An experiment is set up to test whether a particular insect prefer a dark or a bright environment. A chamber with a gradient in light intensity from one end (dark) to the other (bright) has been made. The experimental hypothesis is: “There will be a large difference between ...

Science
How to find Electron Configuration

Grade 9 Science
why does a planet's orbital radius represents that planet's average distance from the sun and not its exact distance?

Science
An airplane with a speed of 27.4 m/s is climbing upward at an angle of 48° counterclockwise from the positive x axis. When the plane's altitude is 860 m the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...

art
which of the following was true of the age of reason? a. people justified their faith using scientific principles b. people valued science over faith c. people debated the raison detre

science
A polo player hits a ball with a mass of 0.42 kg with a force of 7.35 Newtons. How does the force the polo player's mallet exerted on the ball compare to the force the ball exerted on the mallet? A. The force of the mallet on the ball is equal in magnitude and opposite in ...

science
example of a change in state in state that releases energy

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