Sunday
April 19, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

science 1 question
In a cladogram, a branch point represents a(n) _______ and a branch that ends without leading to a living species represents _______? a. common ancestor; extinction b. mutation; punctuated equilibrium c. extinct species; common ancestor d. common ancestor; speciation I think ...
Saturday, January 10, 2015 at 9:08pm

science
ways to help farmers increase agricultural productivity
Saturday, January 10, 2015 at 7:04pm

science
if .38 kJ of heat is added to 19.6 grams of ice at -12.0 degrees celsius, what will be the final temperature?
Saturday, January 10, 2015 at 5:03pm

Maths lit,History,Life Science and B.S.
What career should I take with these subjects. Maths Lit, Business Studies , Life Science and History?
Saturday, January 10, 2015 at 12:26pm

political science
Do you think Indian middle class has strengthened or undermined democracy process in India?justify?
Saturday, January 10, 2015 at 5:18am

science
A quantity of steam (750 g) at 122°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?
Friday, January 9, 2015 at 5:13pm

science
1 which of earths spheres contains most of its mass? A atmosphere B hydrosphere C geosphere* D biosphere 2 erosion and weathering are examples of which types of forces? A constructive forces B destructive forces* C gravitational forces D inertia-related forces 3 which of the ...
Friday, January 9, 2015 at 12:07pm

Science - Please answer as soon as possible
Which of the following systems is not directly involved in the body's regulation of water. a. digestive b. muscular c. urinary d. integumentary
Friday, January 9, 2015 at 11:14am

science
Which of the following is true? ( a ) when plant is kept in sunlight ,photosynthesis and cellular respiration occurs. ( b ) when plant is kept in sunlight ,only photosynthesis occurs (c ) when plant is kept in dark place ,photosynthesis &cellular respiration don't occur
Friday, January 9, 2015 at 8:42am

science
Is there any stars between the Earth and the Moon?
Friday, January 9, 2015 at 1:45am

science
Which among the following is obtained by reduction of ethanol (a) ethanol (b) co2& O2 (c) methanol (d) all
Friday, January 9, 2015 at 1:22am

science
An inverted image of a candle is formed when kept in front of a convex mirror .If half lens is covered by an op equestrian material than how will the image be?
Friday, January 9, 2015 at 1:03am

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 ...
Thursday, January 8, 2015 at 8:20pm

Science
Is this equation balanced or unbalanced? H3PO4 and H4P2O7+H2) The first equation has 3 Hydrogen, 1 Phosphorus, and 4 Oxygen. HOw do you find the second equations Oxygen?
Thursday, January 8, 2015 at 8:20pm

SCIENCE
CH4+O2>CO2+H2O
Thursday, January 8, 2015 at 4:41pm

SCIENCe
Consider a wetland ecosystem similar to the one shown in the image below. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor.Suppose that the local ...
Thursday, January 8, 2015 at 4:38pm

SCIENCe
Consider a wetland ecosystem. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor. Suppose that the local temperature changes in favor of greater oxygen ...
Thursday, January 8, 2015 at 4:33pm

General Chemistry Project Ideas?
Hi I'm a high school science teacher and I teach General Chemistry when we learn how chemistry relates to our everyday lives. Right now were learning about some common compounds. I need projects ideas regarding some common compounds relating to their everyday lives.
Thursday, January 8, 2015 at 4:09pm

science
which one of these are not used to power generators? A- wind B- moving water C- hot rocks under earth's surface D- static electricity
Thursday, January 8, 2015 at 4:01pm

science
Question 1 of 20 5.0 Points Which statement is correct? A. Both protists and fungi are eukaryotic. B. Both animals and fungi lack cell walls. C. Both plants and fungi undergo photosynthesis. D. Like some prokaryotes, fungi are autotrophic. any help??
Thursday, January 8, 2015 at 3:45pm

Useless Science Question
a bicyclist is in a 50-km race. She says she had an average velocity of 35. What is missing in the cyclist's velocity?
Thursday, January 8, 2015 at 2:13pm

science
what is the Half-life of strontium 90. Explain your work. Okay well I already know the answer is 28yrs but I just don't know how to explain it on how I got the answer... can you guys help me please! I need this done in 30 seconds..
Thursday, January 8, 2015 at 1:25pm

Science help please
Use the word bank below to answer the questions that follow: conservation carbon footprint decompose slower renewable biodegradable desertification fossil fuels aquaculture hydroelectric geothermal ozone land reclamation point decompose faster nuclear photochemical ...
Thursday, January 8, 2015 at 12:59pm

science
1. The Cenozoic Era is also referred to as the? A. Age of Mammals. B. Age of Fish. C. Age of Dinosaurs. D. First Era. 2. When new clay sediment is deposited on top of old beach material, it's known as? A. Transgression. B. Regression. C. Progression. D. Aggression. 3. ...
Thursday, January 8, 2015 at 12:34pm

science
home / homework help / questions and answers / science / physics / the temperature of an ideal gas at an initial pressure ... Question The temperature of an ideal gas at an initial pressure P1 and volume V1 is increased at constant volume until the pressure is doubled. The ...
Thursday, January 8, 2015 at 8:39am

science
Daniel is riding the giant drop at great america if Daniel free falls for 2.6 seconds?
Wednesday, January 7, 2015 at 10:06pm

Science
To lift an object weighing 21,000 N, how much force is needed on a piston with an area of 0.060 m2 if the platform being lifted has an area of 3.0 m2 ? If the weight is 21,000 N which is also a force and to find Buoyancy force then 3.0 m2 + .06 m2 = 3.6 m2 21,000/3.6 Im pretty...
Wednesday, January 7, 2015 at 9:25pm

Physical Science
An 80.00 kg man playing hockey catches a puck moving at 20 m/s. The man is initially at rest. The man and puck move together after the collision. The puck's mass is 0.16 kg. What is the final velocity? A. 13.6 m/s B. 0.04 m/s C. 1.36 m/s D. 4.0 m/s
Wednesday, January 7, 2015 at 9:22pm

Science
H2SO4. It's asking for the number of atoms and the total atoms. Do I just put 7 atoms for both questions?
Wednesday, January 7, 2015 at 9:09pm

Science
H2SO4. It's asking for the number of atoms and the total atoms. Do I just put 7 atoms for both questions?
Wednesday, January 7, 2015 at 5:35pm

Science quiz - Check answers?
1. Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this? a. The antibiotic mutated the bacteria, which allowed resistance to develop...
Wednesday, January 7, 2015 at 5:26pm

Science
1. Name the components of the respiratory system in the order incoming air would encounter them during breathing. trachea, pharynx, larynx, alveoli, bronchi bronchi, larynx, alveoli, trachea, pharynx larynx, trachea, bronchi, pharynx, alveoli pharynx, larynx, trachea, bronchi...
Wednesday, January 7, 2015 at 5:20pm

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 at 5:11pm

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 at 5:08pm

Science
IF the medium is changed, THEN the refraction of light will increase*** decrease
Wednesday, January 7, 2015 at 4:49pm

Science
How does a change in medium affect light?
Wednesday, January 7, 2015 at 4:48pm

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 at 12:49pm

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 at 9:10pm

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 at 9:09pm

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 at 7:18pm

Science
How would a scientist determine the absolute age of a fossil?
Tuesday, January 6, 2015 at 7:08pm

science
describe a process that could cause an uncomformity
Tuesday, January 6, 2015 at 7:06pm

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 at 6:55pm

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 at 6:50pm

Science
A mass extinction is a catastrophic event because _______?
Tuesday, January 6, 2015 at 6:44pm

Science
How to find how many atoms are in a formula such as H20
Tuesday, January 6, 2015 at 6:38pm

science
3 examples of objects of high kinetic and 3 examples of low kinetic
Tuesday, January 6, 2015 at 4:55pm

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 at 10:14am

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 at 11:46pm

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 at 10:58pm

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 at 4:02am

science
if castr raises his chevy down highway 37 for 2,560 m. in 60 seconds. what is his speed
Monday, January 5, 2015 at 3:59am

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 at 7:32pm

Science
Would there be as much variety to living things if meiosis did not occur?
Sunday, January 4, 2015 at 2:49pm

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 at 2:25pm

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 at 10:55am

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 at 10:52am

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 at 11:24pm

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 at 11:21pm

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 at 4:53pm

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 at 3:55pm

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 at 1:08pm

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 at 8:13pm

science
What is the hook's law?
Thursday, January 1, 2015 at 7:16am

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 at 7:05am

earth science
the Julian calendar is the calendar we currently use. True or false. my guess is true
Thursday, January 1, 2015 at 2:34am

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 at 2:27am

earth science
During the summer _________ in India, wet air from the Indian ocean brings heavy rain to India.
Tuesday, December 30, 2014 at 11:14pm

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 at 11:06pm

science
How can radioactive dating help determine the absolute age of a rock (or rock layer)?
Tuesday, December 30, 2014 at 3:15pm

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 at 12:25pm

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 at 12:25pm

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 at 11:07am

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 at 6:24pm

Science
Name a way in which our government dictates the administration of vaccines to children.
Monday, December 29, 2014 at 10:58am

science
Name a way in which our government dictates the administration of vaccines to children
Monday, December 29, 2014 at 12:33am

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 at 9:20pm

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 at 9:46pm

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 at 11:40am

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 at 10:42am

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 at 12:39am

science
how are relative dating and absolute dating different
Thursday, December 25, 2014 at 12:52pm

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 at 7:04pm

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 at 6:34pm

EARTH SCIENCE
Smog is the worst in.. A. Chicago B. New York C. Los Angles MY GUESS: C. LOS ANGLES
Monday, December 22, 2014 at 6:23pm

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 at 6:12pm

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 at 6:03pm

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 at 2:45pm

science
Blank is a major component of bones and the proteins that build muscles
Monday, December 22, 2014 at 7:04am

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 at 11:42pm

science
is this correct? what I just sent you?
Sunday, December 21, 2014 at 7:38pm

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 at 5:21pm

Science
If 1 J of energy is applied to lift an object of 500 kg how high will it rise?
Sunday, December 21, 2014 at 10:32am

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 at 10:25am

Science
A ball is thrown up and attains a maximum height of 1000 m.It's initial speed was?
Sunday, December 21, 2014 at 10:19am

Science
WHY PUMICE STONE FLOAT IN WATER
Sunday, December 21, 2014 at 8:58am

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 at 8:43pm

Maths lite, business, geography, life science
What carreer can I choose after matric with these subjects?
Saturday, December 20, 2014 at 2:23am

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 at 2:14pm

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 at 1:18pm

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