Tuesday
September 1, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

Science
When Marie Curie Isolated uranium from pitchable, she realized that the [itchable was more radioactive than the uranium she had extracted. What did she conclude about her observations? pitchblende itself is a radioactive element the pitchblende sample contained an unknown ...
Wednesday, January 7, 2015 by jeje

Science
What was Henri Becquerel studying when he accidentally discovered radioactivity? Photography Properties of black light Properties of X-rays *** Solar energy
Wednesday, January 7, 2015 by jeje

Science
IF the medium is changed, THEN the refraction of light will increase*** decrease
Wednesday, January 7, 2015 by jeje

Science
How does a change in medium affect light?
Wednesday, January 7, 2015 by jeje

Physical Science HELP
What and how do I balance this if it needs to be done? Help please Balance the equation, if necessary, for the reaction between zinc and iodine. Zn + I2 „_ 2ZnI2
Wednesday, January 7, 2015 by tracey

Physical science
a mass of 10g of sodium nitrate is dissolved in 10ml of water at 80 degrees celsius, at what temperature will it start to precipitate?
Tuesday, January 6, 2015 by Abraham

science
Does the temperature of the water affect the reaction of a lava lamp? Does the size of the bottle affect how many blobs are produced of a lava lamp? Does the effect still work if the cap is put on the bottle of a lava lamp? Does the size of the tablet pieces affect the number ...
Tuesday, January 6, 2015 by eduarda

Science
I'm kinda in a rush but take your time!Thx! 1.What was Henri Becquerel studying when he accidentally discovered radioactivity? A.photography B.properties of black light C.properties of X-rays D.solar energy 2.When Marie Curie isolated uranium from pitchblende, she realized...
Tuesday, January 6, 2015 by I am awesome

Science
How would a scientist determine the absolute age of a fossil?
Tuesday, January 6, 2015 by Chloe

science
describe a process that could cause an uncomformity
Tuesday, January 6, 2015 by anonymous

Science
Find the amount Atoms and the total amount of elements for each formula C4H10 2 elements 14 atoms H4Mg3Si2O9 4 elements 18 atoms C6H7O2(OH)3 3 elements 18 atoms Pb(NO3)2 3 elements 9 atoms
Tuesday, January 6, 2015 by M

Science
Find the amount Atoms and the total amount of elements for each formula HCl 2 elements and 2 atoms H2SO4 3 elements 7 atoms KI 2 elements 2 atoms H2O 2 elements 3 atoms
Tuesday, January 6, 2015 by M

Science
A mass extinction is a catastrophic event because _______?
Tuesday, January 6, 2015 by Alex

Science
How to find how many atoms are in a formula such as H20
Tuesday, January 6, 2015 by M

science
3 examples of objects of high kinetic and 3 examples of low kinetic
Tuesday, January 6, 2015 by ser

Science/earth
How does money and politics affect the public claims about global warming? Pick on news source (news company, think tank, or university) and investigate its credibility.
Tuesday, January 6, 2015 by John

science
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
Monday, January 5, 2015 by Kyle

science
a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.
Monday, January 5, 2015 by Kyle

science
Jan calculations of the talantola found that the spider able to cover 20 cm. in 5 seconds.What was the speed of the spider?
Monday, January 5, 2015 by hana

science
if castr raises his chevy down highway 37 for 2,560 m. in 60 seconds. what is his speed
Monday, January 5, 2015 by dorothy

computer science check
Which of the following examples correctly describes the order in which these parts of a program should be written? (Select the best answer.) A- The import command, then function definitions, then function calls B- Function definitions, then the import command, then function ...
Sunday, January 4, 2015 by Skye

Science
Would there be as much variety to living things if meiosis did not occur?
Sunday, January 4, 2015 by 8th grade Science

science
What is an experiment I could do that investigates the effect of different forces on an objects motion? I need some suggestions please!
Saturday, January 3, 2015 by Help

Science/ Evolution
According to the authors, (Hewlett, Martinez & Peters, Ted), why should the Christian commitment to truth lead Christians to support Darwinian and neo-Darwinian scientific research?
Saturday, January 3, 2015 by Linda

Science
Please explain what the authors, (Hewlett, Martinez & Peters, Ted), mean when they write that the neo-Darwinian model is very fertile? Please explain one of their three examples of this fertility.
Saturday, January 3, 2015 by Linda

Science
Please explain what the authors, Hewlett, Martinez & Peters, Ted, mean when they write that the neo-Darwinian model is very fertile? Please explain one of their three examples of this fertility.
Friday, January 2, 2015 by Anonymous

Science
According to the authors, Hewlett, Martinez & Peters, Ted, why should the Christian commitment to truth lead Christians to support Darwinian and neo-Darwinian scientific research?
Friday, January 2, 2015 by Anonymous

Science
What is an example of population. A. all the animals in a forest B. All the trees in a forest C. All the maple trees in a forest D. all the weeds in a forest Please help!!!
Friday, January 2, 2015 by Sarah

science
Calculate the moment of inertia of a uniform disc of mass 200g and radius 5cm about an axis passing through its edge and perpendicular to its plane?
Friday, January 2, 2015 by jagdeep

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
Friday, January 2, 2015 by Mo

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
Thursday, January 1, 2015 by Karen

science
What is the hook's law?
Thursday, January 1, 2015 by Zahra ferdous

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?
Thursday, January 1, 2015 by Zahra ferdous

earth science
the Julian calendar is the calendar we currently use. True or false. my guess is true
Thursday, January 1, 2015 by Elena

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
Thursday, January 1, 2015 by Elena

earth science
During the summer _________ in India, wet air from the Indian ocean brings heavy rain to India.
Tuesday, December 30, 2014 by Elena

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.
Tuesday, December 30, 2014 by Elena

science
How can radioactive dating help determine the absolute age of a rock (or rock layer)?
Tuesday, December 30, 2014 by Anonymous.

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).
Tuesday, December 30, 2014 by CHAN

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 ...
Tuesday, December 30, 2014 by CHAN

science
Is it bad to shave the pubic hair? Why or why not? How does shaving affects the growth of pubic hair?
Tuesday, December 30, 2014 by ZACHARY

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?
Monday, December 29, 2014 by cooksthe1

Science
Name a way in which our government dictates the administration of vaccines to children.
Monday, December 29, 2014 by cooksthe1

science
Name a way in which our government dictates the administration of vaccines to children
Monday, December 29, 2014 by cooksthe1

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?
Sunday, December 28, 2014 by cooksthe1

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?
Friday, December 26, 2014 by jenny

science
A 2 kw&22 heater works on domestic voltage main supply. What should be the current rating of fuse explain
Friday, December 26, 2014 by sanjay

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?
Friday, December 26, 2014 by Lettie

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
Friday, December 26, 2014 by sanjay

science
how are relative dating and absolute dating different
Thursday, December 25, 2014 by susan

science
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. C. A living thing dies and its skeleton is left exposed to ...
Tuesday, December 23, 2014 by SkatingDJ

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
Monday, December 22, 2014 by Elena

EARTH SCIENCE
Smog is the worst in.. A. Chicago B. New York C. Los Angles MY GUESS: C. LOS ANGLES
Monday, December 22, 2014 by Elena

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 ...
Monday, December 22, 2014 by Elena

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
Monday, December 22, 2014 by karen

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
Monday, December 22, 2014 by Samboni

science
Blank is a major component of bones and the proteins that build muscles
Monday, December 22, 2014 by johanna

science
A running back has 3500 J of kinetic energy and is running at a speed of 8 m/s. Calculate his mass.
Sunday, December 21, 2014 by steve

science
is this correct? what I just sent you?
Sunday, December 21, 2014 by Linda

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). ...
Sunday, December 21, 2014 by Linda

Science
If 1 J of energy is applied to lift an object of 500 kg how high will it rise?
Sunday, December 21, 2014 by Shubham

Science
The work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h is?
Sunday, December 21, 2014 by Shubham

Science
A ball is thrown up and attains a maximum height of 1000 m.It's initial speed was?
Sunday, December 21, 2014 by Shubham

Science
WHY PUMICE STONE FLOAT IN WATER
Sunday, December 21, 2014 by Anish

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 ...
Saturday, December 20, 2014 by Maria

Maths lite, business, geography, life science
What carreer can I choose after matric with these subjects?
Saturday, December 20, 2014 by Sisipho Mbeleni

Science
How have humans observed heredity over time and how has that perception changed as major paradigm shifts in the discipline took place?
Friday, December 19, 2014 by Linda

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
Friday, December 19, 2014 by Linda

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 ...
Friday, December 19, 2014 by abby

science
Explain the concept of public trust as the author uses it.
Friday, December 19, 2014 by Linda

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. (...
Friday, December 19, 2014 by DFD

science
How have humans perceived heredity over time and how has that perception changed as major paradigm shifts in the discipline took place.
Friday, December 19, 2014 by Linda

Science
In a sample of 0.65L of H2O contains 2.5×10^50 molecules.What is the density of sample of H2O?
Friday, December 19, 2014 by Vats

Science
How are respiration and fermentation similar? How are they different?
Thursday, December 18, 2014 by Humanoid

Science
Can an egg or sperm be formed through mitosis?
Thursday, December 18, 2014 by Anon

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 ...
Thursday, December 18, 2014 by Mayflower

Science
What allows small particles to move through cell membranes? Is it diffusion?
Thursday, December 18, 2014 by Humanoid

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.
Thursday, December 18, 2014 by Skye

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?
Thursday, December 18, 2014 by mayank

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?
Thursday, December 18, 2014 by Jasmine

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?
Thursday, December 18, 2014 by Arave karn

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!
Thursday, December 18, 2014 by Skye

science
Which of the following best describes the process of diffusion?
Thursday, December 18, 2014 by Anonymous

HEALTH
Phonology refers to the science which treats
Wednesday, December 17, 2014 by MARCUS

HEALTH
Phonology refers to the science which treats A. blood disorders. B. vocal sounds. C. heart rhythms. D. nutritional deficiencies.
Wednesday, December 17, 2014 by MARCUS

Science
Assume that you have 15ml of 2.5M potassium hydroxide but only have concentrated bottle of 16M strength. How would you obtain this
Wednesday, December 17, 2014 by Jon

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?
Wednesday, December 17, 2014 by Chris

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
Wednesday, December 17, 2014 by angelo

Science Please Help
an illness caused by fungus
Wednesday, December 17, 2014 by Anonymous

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?
Wednesday, December 17, 2014 by Katie

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 ...
Wednesday, December 17, 2014 by Bobby

science
uncertainties for... grams? digital balance cm? minutes? 5 minutes? milliliter (ml)?
Tuesday, December 16, 2014 by Anonymous

Science
Why are liners laid down at the bottom of a landfill before waste is deposited in the landfill ?
Tuesday, December 16, 2014 by Breyanna

Science
Express your opinion about dealing with antibiotic resistance you think are most important to pursue.
Tuesday, December 16, 2014 by Anonymous

science 8
Waht is the reason for the seasons experiment?
Tuesday, December 16, 2014 by Ken

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 ...
Monday, December 15, 2014 by SkatingDJ

Science
Why are there variations in atmospheric pressure how was this proven? Why do your ear pop when trebling to different altitudes?
Monday, December 15, 2014 by Jennifer

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?
Monday, December 15, 2014 by SkatingDJ

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 ...
Monday, December 15, 2014 by Callie

Science help
A (blank) is a tool used to capture the energy in sunlight. My answer Photochemical Am I right?
Monday, December 15, 2014 by Callie

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