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September 19, 2014

Homework Help: Science

Branches of Science

Recent Science Questions

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physical science
On the question...a runner completes exactly 2 laps around a 400 meter track...what is the distance and what is the displacement? Would it be...800m for distance and 0m for displacement? Thanks...
Wednesday, August 20, 2014 at 8:30pm

Life science
Darwin and charles theory on leaves of many desert plants are reduce to thorns
Wednesday, August 20, 2014 at 3:57pm

science
victoria discovered a new way to keep her hands warm on a cold day. what scientific attitude is this an example
Wednesday, August 20, 2014 at 1:27pm

Science
4)What geographic feature marks the last obstacle for Georgia's rivers on their way to the Atlantic Ocean? A)The Floridian Aquifer B)The valley and ridge region C)the Fall Line D)the Marshes of Glynn 7)Which northern Georgia region has relied predominantly on coal mining ...
Wednesday, August 20, 2014 at 12:10pm

Science
which of the following are impacts that the temperature climate has had on Georgia's development? A) encouraging crops with longer growing season B)Drawing immigrants from other locations C)encouraging tourism D)all of the above
Wednesday, August 20, 2014 at 10:45am

Science
A piece of magnesium ribbon weight 24g is burn in air an 40g magnesium oxide is formed. What mass of oxygen combined with the magnesium in this reaction
Wednesday, August 20, 2014 at 8:32am

physical science
what is the density of a cube with mass 50g & volume 2cm x 2cm x 2cm?
Wednesday, August 20, 2014 at 4:08am

Physical Science
I'm having trouble with the question: Critique the phrase "airspeed velocity of a swallow." What is meant by this. I know a swallow is a bird and velocity is the speed of an object and the direction of its motion. Not sure the question is asking. Thanks..
Tuesday, August 19, 2014 at 7:22pm

science
can you please help me find 3 good science experiment? for the science fair....
Tuesday, August 19, 2014 at 6:04pm

Science
Could you make sure I'm correct? What is true of the work of all scientists? scientists ask testable questions and devise ways to answer those questions through experimentation or observation
Tuesday, August 19, 2014 at 5:52pm

science
you have a ball of steel and a ball of iron both of the same volume. The ball of of steel has a larger mass. Is it denser, less dense, or does it have the same density as the ball of iron. Explain.
Tuesday, August 19, 2014 at 4:53pm

Physical science
Calculate the volume(at STP) Of these compounds (a) 1,5 mol oxygen gas (b) 0,01 mol of hydrogen chloride gas (c) 3 mol helium
Tuesday, August 19, 2014 at 2:40pm

Science
Calculate the number of (a) atoms in 50 dm^3 nitrogen gas (b)nucleons in 10 cm^3 fluorine gas
Tuesday, August 19, 2014 at 2:26pm

Science
Justin wants to be the captain of an aircraft carrier when he gets out of school. Which subjects should Justin study to help him prepare for his career? A.biomedical science and meteorology B.oceanography and paleontology C.chemistry and biology D.physics and computer science ...
Tuesday, August 19, 2014 at 2:08pm

science
you have a ball of steel and a ball of iron both of the same volume. The ball of of steel has a larger mass. Is it denser, less dense, or does it have the same density as the ball of iron. Explain.
Tuesday, August 19, 2014 at 2:04pm

Science
Which branches of science do pharmacists need knowledge of to do their job properly? A.physics and chemistry B.biology and chemistry C.chemistry and geology D.physics and computer science Is the answer B?
Tuesday, August 19, 2014 at 1:59pm

science
In the space is there any aliens?
Tuesday, August 19, 2014 at 9:55am

Science
Your younger brother who wishes to be a pilot reads a news article about a search and rescue plane. In this search and rescue operation, an ultra-light aircraft travelling north at 30 km/hr encounters a 40 km/hr crosswind. After explaining to him that a crosswind is wind that ...
Tuesday, August 19, 2014 at 9:45am

Science
Can someone please help me on my science?? I'm kinda new here. Thanks :)
Tuesday, August 19, 2014 at 9:05am

Science
In general, what would a scientist do after forming a testable question? A. Design an experiment B. Develop a hypothesis C. Draw a conclusion D. Analyze data (I think B. is that the right answer)
Tuesday, August 19, 2014 at 8:54am

Science
A science teacher was curious to see whether offering money for good grades would increase student peformance on a test. The teacher offered half of the students in the class $5.00 if they got an A on their next test. The other half of the class was not offered any money. What...
Tuesday, August 19, 2014 at 8:52am

science
If it takes more than a few experiments to find the answer to a particular problem, it means that the scientist has failed and is not a very good researcher.
Tuesday, August 19, 2014 at 8:18am

Science
What is the formula used for finding the gravitational pull of a particular mass in physics?
Monday, August 18, 2014 at 10:55pm

Environmental Science
Answer the questions about the following processes in the space provided below. You only need to indicate a process by its number. For each question list as many processes as apply. Process 1: 6 CO2 + 6 H2O → C6H12O6 + 6 O2 Process 2: C6H12O6 + 6 O2 → H2O + 6 CO2...
Monday, August 18, 2014 at 7:06pm

physical science (chemistry)
calculate the number of atoms in 50 dm3 nitrogen gas
Monday, August 18, 2014 at 4:35pm

life science
why do desert plants have thorns instead of leaves ?Explain the answer according to theories of Charles Darwin and Jean Baptiste de Lamarck
Monday, August 18, 2014 at 12:42pm

Science
A car weighing 15,000N rounds a curve of 60m at an angle of 30 degrees. Find the friction force acting on the tires when the car is travelling at 100kph. The coefficient of friction between tires and the road is 0.90
Monday, August 18, 2014 at 3:54am

dav science
a machine gun fires 25 g bullets at the rate of 600 bullets per minute with a speed of 200 m/s. calculate the force required to keep the gun in position.
Sunday, August 17, 2014 at 9:52pm

science(biology)
state three secondary functions of roots,stems and leaves
Sunday, August 17, 2014 at 6:32pm

history, life science, cat, maths lit
What career path can I follow with these subjects?
Sunday, August 17, 2014 at 1:46pm

history, life science, cat, maths lit
What career path can I follow with these subjects?
Sunday, August 17, 2014 at 8:32am

science cbse school
a force of 10 newton gives a mass m1 an acceleration of 2m/s2 and a mass m2 an acceleration of 4m/s2.what acceleration would it givr if both the masses are tied together?
Sunday, August 17, 2014 at 4:16am

Science
In the early 1900s, Alfred Wegener noticed that some of the Earth's continents looked like they might fit together like a jigsaw puzzle. He also observed that the continents that looked like they fit together had similar plants, animals, and rock formations. From this ...
Friday, August 15, 2014 at 11:29am

Science
Is the unit of measurement for a particle beam FLUX - the femtobarn ??? Thanks
Friday, August 15, 2014 at 7:19am

science
the melting point of pure benzoic acid and pure naphthol are 122.5 and 123 degree Celsius respectively. you are given a pure sample that is known to be either pure benzoic acid or 2- naphthol. describe a procedure you will use to determine the identity of the sample.
Thursday, August 14, 2014 at 6:51pm

science (chemistry)
filter paper is a poor material on which to powder a solid before introducing it into a melting tube .explain why?
Thursday, August 14, 2014 at 6:35pm

Science
The upper layer of the ocean contains an abundance of microorganisms that carry out photosynthesis, such as algae. Why would this make the upper layer rich in oxygen?
Thursday, August 14, 2014 at 4:05pm

fundinjobo high science
a mass of 80 grams of hydrogen gas is heated with nitrogen gas to produce ammonia gas .what is the mass of ammonia that will be produced
Thursday, August 14, 2014 at 12:29pm

science
what do sporangia, cone and flowers have in common? how do they differ?
Wednesday, August 13, 2014 at 8:06pm

science help
where are the science helpers is this a connection for math help only
Wednesday, August 13, 2014 at 4:19pm

Earth Science
A scientific hypothesis can become a theory if? a- the entire scientific community accepts it b- the hypothesis is tested extensively and competing hypothesis are eliminated c- there are no other competing hypothesis d- the hypothesis can be tested at least once My answer is B
Wednesday, August 13, 2014 at 2:49pm

science
What do sporangia, cones, and flowers have in common? How do they differ?
Wednesday, August 13, 2014 at 2:27pm

Science
If a nuclide has a decay constant of 10^-6 s-1 what is its half life ??? I think it is 0.693 / 10^-6 = 693000 or 6.93 x 10^5 Is this right ...
Wednesday, August 13, 2014 at 11:51am

Earth Science
what is the driving force for the movement of the lithospheric plates? a- heat from the sun b- unequal distribution of heat within Earth c- heat in the atmosphere d- unequal distribution of heat from the oceans My answer is B
Tuesday, August 12, 2014 at 1:41pm

math lit, life science, geography and cat
Hi im a Matric learner and would really like to know what careers I could possibly look into with my subjects listed above Thank you
Tuesday, August 12, 2014 at 1:22pm

Science
What is Biological adaptation. Please explain in plain words.
Monday, August 11, 2014 at 1:46pm

physical science
calculate the number of molecules in 30g water
Monday, August 11, 2014 at 10:39am

Science
*Cement is 70% CaO by mass *Concrete is 17% cement by mass *Concrete masses 150lbs. per cubic feet *There are 27 cubic feet in a cubic yard *15 cubic yards required for house of concrete. CaCo3(s)---CaO(s)+CO2(g) 1.) How many kg. of carbon dioxide were liberated to make your ...
Saturday, August 9, 2014 at 10:55pm

science
What are the six types of simple machines?
Saturday, August 9, 2014 at 12:16pm

science
Why will foot print stay on the moon forever?
Saturday, August 9, 2014 at 4:22am

science
Which is the biggest flower of all?
Saturday, August 9, 2014 at 4:18am

Science
Why carbon brushes is used in machinary, while carbon z a non metal?
Saturday, August 9, 2014 at 3:15am

Science
A car converts 1000 J of energy from a sample of fuel. 750 J of heat (thermal energy) is produced by the engine, 150 J of heat is produced in the transmission, drive train, etc., and 100 J of work is done to move the car. How efficient was the process of burning fuel for the car?
Friday, August 8, 2014 at 11:06pm

life science
why these fossils important discoveries?
Friday, August 8, 2014 at 12:09pm

science
I answered this already. Should you multiply the answer in letter b to 2? QUESTION: Phil Younghusband is a sensational striker of the Philippines National Football team Azkals. An avid fan of his claims that Phil can kick the football and give it an initial speed of 50 m/s. If...
Friday, August 8, 2014 at 7:50am

science
Two students perform a simple experiment. One flicks a dime from the edge of a table. At the same instant, the other student drops a quarter from the same height. Ignoring air resistance, which coin strikes the floor first? Explain why. My own answer.. is this right? "in ...
Friday, August 8, 2014 at 7:48am

Environmental Science
H.B.D. Kettlewell observed that peppered moths in the forests of England were becoming darker in color over time. In addition, he observed that pollution had turned the tree trunks black. He thought it would be easy for birds to spot and capture light-colored moths resting on ...
Thursday, August 7, 2014 at 9:43pm

Science
Imagine that you are part of a research team that is working to control the spread of the Japanese beetle. This is an insect pest from Japan first discovered on the east coast of the United States in 1916. Since that time it has been spreading slowly south and west. The grubs ...
Thursday, August 7, 2014 at 9:11pm

Psyc, statistics
Introduction to Hypothesis Testing In an article entitled “Science and ethics in conducting, analyzing, and reporting psychological research” in the journal Psychological Science (1994), psychologist Robert Rosenthal examines the relationship between a researcher&#...
Wednesday, August 6, 2014 at 5:41pm

Life Science, Geography, BSTD's and Mathematics
im in GRADE10, im doing those subjects: maths, lyf science, geog and bstd's. So I need help about which job i can get for doing those subjects?
Wednesday, August 6, 2014 at 1:03pm

science
how to measure length accurately using meter scale?
Wednesday, August 6, 2014 at 12:37pm

SCIENCE
A 1.5 kg book on top a shelf has a PE (Potential Energy) of 29.4 J. How high is the shelf?
Wednesday, August 6, 2014 at 10:16am

SCIENCE
A 1.5 kg book on top a shelf has a PE of 29.4 J. How high is the shelf?
Wednesday, August 6, 2014 at 10:00am

science
doing a biology project and they want us to figure out how long it takes to cook 6 different foods at 5 different temperatures and gather 30 seperate data points. They want us to identify an x(independent) and a y(dependent) variable that can be recorded on a table. Would x be...
Tuesday, August 5, 2014 at 7:17pm

HELPPP
I printed out a summer activite to test my skill on science and i found some that i stumbled upon and couldnt figuire out so help? If im wrong then please correct me. 2.A 3.B 4.B 5.A 6.B 2.Giraffes have long necks that allow them to eat leaves in trees. What is this an example...
Tuesday, August 5, 2014 at 12:01am

Science(check answers)
I printed out a summer activite to test my skill on science and i found some that i stumbled upon and couldnt figuire out so help? If im wrong then please correct me. 2.A 3.B 4.B 5.A 6.B 2.Giraffes have long necks that allow them to eat leaves in trees. What is this an example...
Monday, August 4, 2014 at 10:06pm

science (physics)
A projectileis given an initial velocity of icap + 2jcap . The catesian equation of its path
Monday, August 4, 2014 at 12:50pm

science (physics)
A projectileis given an initial velocity of icap + 2jcap . The catesian equation of its path
Monday, August 4, 2014 at 11:33am

science
1.) what energy transformation are taking place when a ball is dropped from 1.0 m, bounces and tries to 0.80 m, bounces again and rises to 0.64m? What is the efficiency of the energy transformations of ball during a bounce?
Monday, August 4, 2014 at 5:58am

Science (Physics)
Two resistors 3ohms and 6ohms are connected in parallel across a 6V battery, what is the current flow through the 3ohms resistors? Just the formula please.
Sunday, August 3, 2014 at 10:37pm

Science
3 resistors having the same resistance value are wired in parallel, how does the equivalent resistance compare to the resistance value of a single resistor? 1) The equivalent resistance is thrice the value of a single resistor. 2) The equivalent resistance is the same as the ...
Sunday, August 3, 2014 at 10:35pm

earth science
The greenhouse effect is a result of A. absorption and radiation of energy in the atmosphere. B. consumption and radiation of energy in the atmosphere. C. absorption and radiation of energy in the hydrosphere. D. consumption of fruits and vegetables that produce a biofuel. i ...
Sunday, August 3, 2014 at 12:53pm

statistics
The trends in international mathematic and science study (TIMSS) in 2007 examined eighth grade proficiency in math and science. The mean mathematics scale score for the sample of eighth grade students in the US was 508.5 with a standard error of 2.83. Construct a 95% ...
Saturday, August 2, 2014 at 7:14pm

science
Calculate the buoyant force in air on a kilogram of gold (whose density is about 19 grams per cubic centimeter). The density of air is 1.3 ✕ 10-3 grams per cubic centimeter. Remember that the buoyant force is equal to the weight of a volume of air that is equal to the ...
Saturday, August 2, 2014 at 4:33pm

agriculture,maths literacy,life science,geography
which career im going to enter in with?
Friday, August 1, 2014 at 4:30pm

science
Consider a rotating platform such as you used in lab. Imagine that it is initially rotating at some angular velocity. You drop a disk, that is not rotating, onto the top of the rotating platform so that it sticks to the rotating platform and begins rotating along with the ...
Friday, August 1, 2014 at 8:55am

science
a mixture of gases contains 64g of methane, 64g of oxygen and 64g of sulphur dioxide. The pressure of the mixture is 210 kpa. what is the partial pressure (in kpa) of the methane expected to be?
Thursday, July 31, 2014 at 11:29pm

science
forces of 20N to the south,40N to the northeast, and 10N to be east act on the object.the magnitude of resultant force is a)10N b)39 N c)20 N d)46 N
Thursday, July 31, 2014 at 11:09pm

science
The mass of an object is 217.5g and its volume is 192mL. What is the density of the object?
Thursday, July 31, 2014 at 10:33pm

life science
1.why are fossils important discoveries? 2. Why are fossils kept in a glass box in the museum? 3.What feature does australopithecus sediba share with humans? 4.What feature does australopithecus sediba share with apes? 5.Explain the scientific interpretation of the fossils ...
Thursday, July 31, 2014 at 3:53pm

Science/Physics
Andee has a mass of 68.5 kg on earth. What is his weight on Earth? What should his mass be in order to have the same weight at the surface of the moon?
Thursday, July 31, 2014 at 7:23am

science
The greenhouse effect is caused by the burning of fossil fuels and deforestation
Wednesday, July 30, 2014 at 7:16pm

Science
Adam suffers from severe emphysema. Gas exchange in his lungs is not adequate, and he requires supplemental oxygen. But even though his blood carbon dioxide levels are elevated, his blood pH is close to normal. Considering the urinary system, explain how this can occur.
Wednesday, July 30, 2014 at 6:33pm

Science
A researcher is studying the rate of chemical reactions within living blood cells. When placing the cells into a petri dish with a pH of 2.5, the researcher should predict that the rate of the reactions will A. increase immediately. B. decrease immediately. C. remain the same...
Wednesday, July 30, 2014 at 1:24pm

maths lit,life science,economics,history
what career must i follow
Tuesday, July 29, 2014 at 9:52am

science
two point charges of 5 micro culomb and 20 micro culomb are separated by a distance of 2m find the point on the line joining them at which electric field intensity is zero
Tuesday, July 29, 2014 at 3:18am

Science
In pea plants, the allele for tall (T) is dominant to the allele for short (t). Which of the following is the percent of offspring that will be tall if a heterozygous plant (Tt) is crossed with a homozygous tall plant? A. 100% B. 75% c. 50% D. 25% B?
Monday, July 28, 2014 at 5:52pm

Science summer activity help
I saw a site that had fun summer activites and my mom said each one I pass I get 5 dollars so I want to check my answers. 1.B 3.D 4.A 5.D 1.how do scientists explain the great diversity of life on earth? different characteristics help __ A. young organisms find their parents B...
Monday, July 28, 2014 at 5:36pm

Science
. A researcher wants to develop a new pharmaceutical compound to treat pain. Which of the following strategies will likely be the most effective process? A. Test extracts from newly discovered plants for pain-killing substances. B. Read anthropological studies to discover ...
Monday, July 28, 2014 at 3:35pm

Science
While picking up passengers in a big city, a taxi driver drives 20.0 blocks south, then 15.0 blocks east, and then 6.0 more blocks south. What is the magnitude of the taxi’s resultant displacement? Iv'e been using the equation sqrt(x^2+y^2+z^2) THe answer I get is 25....
Monday, July 28, 2014 at 10:12am

Science
Can you give me a good topic for an investigatory proj. Like "The use of grape extract as an active component for removing ferrous oxide". The example is not from me, so I can't really use it. I need something posible that isn't proven yet.
Monday, July 28, 2014 at 8:41am

physical science
what is observed during an experiment of oxalic acid and sodium hydroxide
Monday, July 28, 2014 at 4:33am

science
In an experiment to determine the solubility of lead chloride (PbCl2), 5.6g of (NH4)2SO4 was added to a 250ml solution containing an unknown amount of dissolved lead chloride (PbCl2) resulting in the formation of Lead sulfate precipitate. The mass of the lead sulfate ...
Sunday, July 27, 2014 at 11:45pm

PHI 208 final exam
1. According to the video “Religion, War, and Violence,” Just War Theory asserts that military intervention 2. According to Glaucon, justice is based on 3. What is palliative care? 4. According to Tom Regan, what is fundamentally wrong with our current system 5. On ...
Sunday, July 27, 2014 at 9:03pm

Science
What do these symbols mean: 8=====> and ({!}) and ({8=!})?
Sunday, July 27, 2014 at 4:19pm

geography,maths lit,life science and agriculture
careers available in the following subjects please
Sunday, July 27, 2014 at 3:35pm

science
commercially available concentrated H CL contains 38% H CL by mass (a) what is the molarity of this solution if the density in 1.19gm/l (b) what volume of concentrated HCL is required to make 1l of 0.1M HCL?
Sunday, July 27, 2014 at 10:21am

science
When the front of a 5.0 m long bus traveling at a constant speed of 20 m/s is 55 m away from an intersection, the traffic light turns yellow. It will take 3.0 s before the traffic light turns red. The driver’s reaction time is 0.25 s. The bus can accelerate up to 2.0 m/s2...
Sunday, July 27, 2014 at 4:05am

science
Why do sulphur and iron form a compound on heating?
Sunday, July 27, 2014 at 3:40am

Life Science
Less-economically developed countries will experience higher birth rates than more-economically developed countries due to A. decreased availability of sanitary water. B. higher infant mortality rate. C. higher literacy rate of women. D. increased availability of contraceptives.
Saturday, July 26, 2014 at 3:25pm

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