Wednesday
June 29, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

8th grade science
I'm not sure what's the correct answer: 9)Which of these characteristics can only be attributed to a wave of red light? A)The energy of the wave travels in the same direction as the wave travels. B)The wave travels by vibrating the particles of the medium at a high ...
Monday, March 7, 2016 by Alexis

science
the oxide of which one of the following shows acidic properties?
Monday, March 7, 2016 by Subham Biswal

Science
The trees leaves make a kind of cover that cover over the other plants in the rain forest. What is this part of the rainforest called?
Monday, March 7, 2016 by Lily

Science
Are air masses that form over land moist
Monday, March 7, 2016 by Genesis

science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?
Monday, March 7, 2016 by cuz im not too smart.

science
A machine raises a load of 600N through a height of 1.5m when an effort of 100N moves a total distance of 20m.(a) calculate the work done in raising the load.(b) what is the mechanical advantage of the machine?(c) calculate the efficiency of the machine.
Monday, March 7, 2016 by Anonymous

English
I thought it was C for this Victor Frankenstein recounts the influences that lead to his great experiment: I feel exquisite pleasure in dwelling on the recollections of childhood, before misfortune had tainted my mind and changed its bright visions of extensive usefulness ...
Sunday, March 6, 2016 by Henry

science fair
will a heavy metal spring launch a baseball 7 feet in the air with 5 pounds of preasure
Sunday, March 6, 2016 by bill

Science
When two hydrogen atoms bond with one oxygen atom to form water, what happens to the electrons? A. Each hydrogen atom donates its electron to the oxygen atom. B. The oxygen atom donates an electron to ach hydrogen atom. C. A pair of electrons is shared at each of the hydrogen-...
Sunday, March 6, 2016 by Plz Help!

Science
Name each compound by ionic, hydrogen, or molecular compound and name the following? Im stuck on these! help please!! 1- Al2S3 2- SrI2 3 - CL2O5 4 - FeCl2 5 - BeH2
Sunday, March 6, 2016 by Julie

life orientation
Identity three courses or study field associated with science and give 2 reasons for each
Sunday, March 6, 2016 by maria

math science algebra geography
vvhat r hoes
Sunday, March 6, 2016 by hoez342

science
Gold(at weight 197gmol-1) crystallizes in a cubic closest packed structures ( the face centred cubic ) and its density is 19.3 gcm-3 .calculate its atomic radius.?
Sunday, March 6, 2016 by Anonymous

life science
A suitable aim for investigation 1 to test glocose
Sunday, March 6, 2016 by molepo sj

Science
What is the balanced chemical equation for "solid calcium hydrogen carbonate reacts with hydrochloric acid solution producing carbon dioxide,water and calcium ions in solution?"
Sunday, March 6, 2016 by Anonymous

math
Here is bob's test score math 65 arts 86 science 84 social studies 78 if his average score is 80 ,how many marks did he make in gramma
Saturday, March 5, 2016 by cherise

geography, history, life science and maths literacy
what courses can I do at university( NWU )
Saturday, March 5, 2016 by mpho

Social science
According to Justice William O. Douglas, where can zones of privacy (the right to privacy) be found in the Constitution? Question 2 options: throughout the Constitution in the penumbras of the Bill of Rights in the First Amendment in the writings of the Founders I think it'...
Saturday, March 5, 2016 by Gates

Social science
The Second Amendment continues to be a controversial issue. One of the main questions is whether it was meant as a _______ freedom or _______ freedom. Question 4 options: individual; group absolute; conditional temporary; permanent good; bad
Saturday, March 5, 2016 by Gates

political science
The Lilly Ledbetter Fair Pay Act was passed by President Obama in 2007 in order to address what issue?
Saturday, March 5, 2016 by sammie

political science
The former Soviet Union cannot be considered a democracy because A. it did not regularly hold elections B. it permitted no acts of conventional participation C. it had no legislature D. there was only one political party
Saturday, March 5, 2016 by Anonymous

political science
Which of the following conditions was NOT a part of the Lemon Test, as established by the Supreme Court? A. They must not entangle the government exclusively with religion B. The primary effect must not be to advance or inhibit religion C. There must be a secular purpose D. ...
Saturday, March 5, 2016 by Anonymous

political science
According to Justice William O. Douglas, where can zones of privacy (the right to privacy) be found in the Constitution? A. throughout the Constitution B. in the penumbras of the Bill of Rights C. in the First Amendment D. in the writings of the Founders
Saturday, March 5, 2016 by Anonymous

science
How can we measure the Gravitational field intensity of any place on earth ?
Saturday, March 5, 2016 by Sabbu..

science-math
A pharmacist has an 18% alcohol solution. How much of this solution and how much water must be mixed together to make 10 liters of a 12% alcohol solution?
Saturday, March 5, 2016 by wonka

science
Calculate the wavelength of a wave of frequency 40 MHz propagating in a medium Speed of light-(3*10to the power 5. )
Saturday, March 5, 2016 by Anonymous

Science
What is the charge on 500 mg of electron?
Saturday, March 5, 2016 by Shahkar

Science
How does lustre affect the amount of heat being absorbed by a black can
Friday, March 4, 2016 by Sarah

science
A example of negative feedback a. elevated free t4 resulting in elevated trh b. elevated free T4 resulting in elevated tsh c low free T4 resulting in elevated tsh d. low free t4 resulting in low tsh i think its B. not sure.
Friday, March 4, 2016 by sara

Science
What caused the ten years war
Friday, March 4, 2016 by Grace

Physical science
A 11-kg box is dragged across a frictionless surface by a force F=55N. the box travels 4.0ft. what is the work done by the applied force F and the work done by the normal force?
Friday, March 4, 2016 by barbara

Science Problem Plz Help
A charge q1=7.00 x 10^-6 is placed 0.300m from a second charge q2=-5x10^-6 C. Find the magnitude the force between the two charges.
Friday, March 4, 2016 by Student Lexi

Science
When two hydrogen atoms bond with one oxygen atom to form water, what happens to the electrons? A. Each hydrogen atom donates its electron to the oxygen atom. B. The oxygen atom donates an electron to ach hydrogen atom. C. A pair of electrons is shared at each of the hydrogen-...
Friday, March 4, 2016 by Plz Help!

snowmobiles/science
What other things would be used to make a snowmobile accelerate?
Friday, March 4, 2016 by Brandy

Science
Does the tilt of the earth cause one hemisphere to be closer to the sun? True or false False.
Friday, March 4, 2016 by LOVE

Maths literacy ,life science,history,geography
Which university or college take the subjects that iam doing
Friday, March 4, 2016 by Lauren

maths,geography,life science,history
explain in a short paragraph what can trgger spectator aggressive in sport
Friday, March 4, 2016 by masabata

math lit,life science,geo and history
which careers require these subjects?
Friday, March 4, 2016 by aviwe

Science
A charge q1=7.00 x 10^-6 is placed 0.300m from a second charge q2=-5x10^-6 C. Find the magnitude the force between the two charges.
Friday, March 4, 2016 by Lexi

Science
A cord of negligible mass is wound around the rim of a flywheel of mass 20 kg and radius 20 cm. Steady pull of 25 N is applied in tue cord. The flywheel is mounted on a horizontal axis with frictionless bearings. Compute the angular acceleration of the wheel. Find the work ...
Friday, March 4, 2016 by Rabeena faizal

Science
An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.5 A, how much electrical energy is used by the bulb in 15 minutes?
Friday, March 4, 2016 by April

Science
What is the force that results from a 3,000 kg car accelerating at 20.00 m/s2? A. 150.0 N B. 3,000 N C. 3,020 N D. 60,000 N** I think D
Thursday, March 3, 2016 by Esther

Science
How many valence electrons does magnesium (Mg) have? A. 12 B. six C. three D. two
Thursday, March 3, 2016 by Plz Help!

Science
A 55 kilogram person and a 65 kilogram person climb 8 meters up a flight of stairs in 10 seconds. Compare power used by each person
Thursday, March 3, 2016 by abdul

Weight Is Force! Science
A space ship has a mass of 9000kg. the space ship is launched from Earth and lands on a distant planet where it has a mass of 390000 N. What is the acceleration of the gravity on this planet?
Thursday, March 3, 2016 by Anonymous

physical science
a symmetric projectile spends a total of 20 seconds in the air. it reaches a peak height of 8 meters. how long does it take to reach its peak height? the projectile has a range of 80 meters. what is its horizontal velocity? what is the projectile's horizontal acceleration...
Thursday, March 3, 2016 by anita

physical science
a flower pot is dropped out a twentieth story window. how fast will it be moving after 7 seconds? how much is the acceleration 3 seconds after it falls?
Thursday, March 3, 2016 by anita

Weight Is Force! Science
A space ship has a mass of 9000kg. The spaceship is launched from the Earth and lands on a distant planet where it has a weighted of 39000 N. What is the acceleration of gravity on this planet?
Thursday, March 3, 2016 by Cheetah Veite

physical science
a piece of metal has a mass of 85 cg and a volume of 450L. What is its density in g/cm^3? What would be the mass of 300cm^3 of this metal? What would be the volume of 200 ounces of this metal?
Thursday, March 3, 2016 by anita

physical science
how many centimeters long is the proverbial "10 foot pole?" show work
Thursday, March 3, 2016 by anita

Science
A girl standing on a bridge throws a stone vertically downward with an intial velocity of 15.0 m/s into the river below. If the stone hit's the water 2.00 seconds later what is the height of the bridge above the water?
Thursday, March 3, 2016 by Tyler

science help pls pls
The table below shows the average annual precipitation over a period of five years in three locations of Florida. Locations | Amount of precipitation 1 between 45- 65 inches 2 more than 96 inches 3 less than 8 inches Which of these statements is correct for the three locations...
Thursday, March 3, 2016 by Oscar

science help pls pls
Which of these is an example of how the ocean plays an important role in climate change? The warm Gulf Stream helps maintain moderate temperature in coastal regions in southern Florida. Aquatic animals produce carbon dioxide during respiration which causes warming of ocean ...
Thursday, March 3, 2016 by Oscar

science help pls pls
A student designed an experiment to demonstrate the interaction between Earth systems. The steps of the experiment are given below. *Take a pot full of dry soil. *Keep the pot in direct sunlight. *Do not water the soil for a week. *Observe cracks in the soil after a week. The ...
Thursday, March 3, 2016 by Oscar

Science
Which of the following is not a benefit of wetlands? a) wetlands provide a place for exceptional weather to occur** b) wetlands provide a habitat for fish and wildlife c) wetlands clean and recharge water supplies d) wetlands reduce flooding risks 2. a wetland is to a ...
Thursday, March 3, 2016 by Katherine (please check my answers)

Science
Which solution will best allow the movers to achieve their goal? A) Change the width of the ramp from 4 meters to 3 meters. B) Change the length of the ramp from 4 meters to 5 meters. C) Change the height of the ramp from 3 meters to 4 meters. D) Change the length of the ramp...
Thursday, March 3, 2016 by Marc

science !!
1. how do scientists classify stars? by size distance and color by size distance and brightness by color brightness and distance by size brightness and temperature 2. which of The following factors determines how long is Star will live a stars color stars mass the stars ...
Thursday, March 3, 2016 by PLEASE HELP

science
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. ...
Thursday, March 3, 2016 by Anonymous

science
if the mass of the earth is 598*10 to the power of 22km and the mass moon is 7.36*10 to the power of 22kg. calculate the difference in their masses, what is the answer in scientific notation
Thursday, March 3, 2016 by Anonymous

maths lit,life science, geography and economics
Which career should I follow with those subjects I don't know what to do
Thursday, March 3, 2016 by Kedibone Evenia masipa

Science.
2. Select 3 terms that belong together. To do this, pick one term from each of the 3 sets. Set 1: intertidal zone, neritic zone, deep zone Set 2: moderate light levels, freshwater, temperature fluctuations Set 3: clams, squid, beavers. A. intertidal zone, temperature ...
Thursday, March 3, 2016 by Help?

Science
1. Which of the following explains why sunlight is important to the aquatic ecosystems? A. Sunlight provides a source of heat and energy to increase water temperatures. B. Sunlight keeps harmful bacteria from taking over aquatic ecosystems. C. Sunlight makes it possible for ...
Thursday, March 3, 2016 by Em

science
A car moves 3 kph. Car B which is 50 m ahead of Car A is moving at 6 kph. If car A accelerates by 5m/s/s, determine if the cars will collide
Wednesday, March 2, 2016 by Hannah

Science
Kilograms divided by Newton?
Wednesday, March 2, 2016 by Anonymous

Science
How do you do kilograms multiplied by Newton?
Wednesday, March 2, 2016 by Anonymous

Science
You are walking on a moving sidewalk (moving at a speed of 2 mph).if you are walking in the same direction as the sidewalk at a speed of 4 mph what is your velocity relative to the ground what would be your velocity if you were walking in the opposite direction as the moving ...
Wednesday, March 2, 2016 by Melissa

Science
Tomorrow I have the midterm (Lab-Earth Science) on 1 Minerals Igneous Rocks Sedimentary Rocks 2 Topographic Maps 3 Geologic Time Help with this, please.
Wednesday, March 2, 2016 by Julius Caesar

science ms.sue or mr.reed plz help me
why does the design of the vacuum flask minimize heat transfer by conduction
Wednesday, March 2, 2016 by ashleydawolfy

Science
Describe how the meteorite collision at the end of the Mesozoic affected the atmosphere and the biosphere.
Wednesday, March 2, 2016 by Breanna L.

science
Can scientists use radiocarbon dating to find the age of a very tall, old redwood tree living in an old growth forest?
Wednesday, March 2, 2016 by Breanna L.

Science
1.)Which of the following are chemical changes? A.)Boiling Of Water B.)Melting A Cube of ice C.)Dissolving 10 grams of salt in water D.)Splitting water into hydrogen and oxygen 2) What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen? (1 ...
Wednesday, March 2, 2016 by #FreeGucci

Science
Describe ozone creation and loss in the ozone layer. Does one occur more than the other?
Wednesday, March 2, 2016 by Sue

physcal science
If the velocity of the car is increased to 45 km/hour, what is its kinetic energy?
Wednesday, March 2, 2016 by jennifer

science
nickel complexes(ethylenediamine) with graph of absorbance vs wavelength
Wednesday, March 2, 2016 by linda

science
A cylinder of length 5cm and uniform cross section area 50.24cm^2 is suspended from a spring balance and totally immersed in water.If the density of the material of the cylinder is 1.25g/m^3. Determine the upthrust on the cylinder. Take g=10m/s^2 density of water=1000kg/m^3
Wednesday, March 2, 2016 by Cyprian

Science
what is the role of malic acid in the reproduction of fern plant
Wednesday, March 2, 2016 by Elsa

science
A 34.0-kg crate is being pushed across a floor. The net horizontal force on the crate is 80.0N. Starting from rest, the crate is pushed over a distance of 4.4m. What is the final speed of the crate?
Tuesday, March 1, 2016 by Edgar

I NEED HELP! Science
What happens when particles of a material move father apart?
Tuesday, March 1, 2016 by Bonny the Horse

Mathematics, geography, agricultural science, life science, English, Life orientation And sepedi
I'm doing grade 11 but still I don't know what or which kind of job careers that needs these subjects Agricultural science, Geography, life science, mathematics (pure), Sepedi, English, And lastly life orientation..Help me please and appreciation will bless you.
Tuesday, March 1, 2016 by tebogo aka sleigh fish

Science
If you began with 36 grams of water how many hydrogen and oxygen can you produce in a decomposition reaction
Tuesday, March 1, 2016 by Sammh

Earth Science
How does altitude affect climate (beyond just temperature)?
Tuesday, March 1, 2016 by Anonymous

Science
A row of elements on a periodic table is called a(n) A: group *** B: Period C: valence D: orbital Is this right?
Tuesday, March 1, 2016 by Jadon

computer science
a memory's addressibility is 64 bits what does tell you about the size of the MAR and MDR?
Tuesday, March 1, 2016 by Jason Young

science
a car reduced it's velocity uniformly from 21m/s to14m/s in 10seconds (A) find the retardation (B) the distance cover in this time
Tuesday, March 1, 2016 by kelvin

History
What is taxonomy? a subgroup of organisms (I also feel like its this one also) the classification of plants based on their medical uses an organisms's evolutionary history the science of classification (my answer)
Tuesday, March 1, 2016 by Litzy

Check My Answers for Science!
1: Which of the following is the minimum level of structure needed to perform the function of waste removal? A: Body System B: Tissue C: Cell*** D: Organ 2: Which two systems work with the muscular system to allow the body to move? A: Digestive and Urinary systems B: Skeletal ...
Tuesday, March 1, 2016 by Andrew G.

Science/Biology
the vessels that contain the largest volume in the vascular system are? I think Arteries
Tuesday, March 1, 2016 by Anonymous

Science
A 20 kg mass slides down an inclined plane which is at an angle of 60 degrees to the horizontal 1. Horizontal component of weight force 2. Vertical component of weight force 3. Angle 4. Normal force 5. Net fx 6. Acceleration along incline I really do not get how to do this, I ...
Tuesday, March 1, 2016 by Alyssa

science
if mass of a body is 8g and volume is 10cm3 what is density
Tuesday, March 1, 2016 by asfa

science (physics)
A copper wire with cross sectional area 0.00030cm^2 is to be used in lifting a 100g object.How fast can the object be accelerated if the wire is to stretch not more than 0.10%? What i know is that first find the elongation & then that will help to find acceleration..
Tuesday, March 1, 2016 by joan

science
Physic. You can walk at the average speed of 2.5 m /s. How long will it take to reach your school 1km away?
Monday, February 29, 2016 by mandeep baral

Science (Physics)
Air becomes a conductor when the electric field strength exceeds 3.00 × 106 N/C. Determine the maximum amount of charge that can be carried by a metal sphere 8.5 m in radius. The value of the Coulomb constant is8.99×109 N·m2/C2. Answer in units of C. I have ...
Monday, February 29, 2016 by Lydia

Science
A. alleles B. mitosis C. DNA D. phenotype E.chromosome F. codominance G. diploid H. meiosis I. incomplete dominance J. centromere K. reproduce L. RNA 8. Chromosome pairs contain different versions of genes, which are called __________________. (1 point) alleles 9. The process ...
Monday, February 29, 2016 by HELP FAST PLEASE

science
Who goes to connections? I would like to get answers to questions from the cyber school that im going to
Monday, February 29, 2016 by LILLYJ

Science
Air pollution can be controlled by? A. permitting more storm runoff B. burning more coal C. eliminating sewage D. putting scrubbers on power plants I think it is B
Monday, February 29, 2016 by Faith Hill

science
if A-B=2C,A+B=4C and C=3i+4j, then what are A and B?
Monday, February 29, 2016 by kagisho

Science/biology
A 62 year old man experiences sudden onset of difficulty breathing, followed by double vision, and later by abnormal kidney and liver function tests. Of the following conditions, which is most likely the cause of his problems? A. Vasculitis​​ B. Raynaud's ...
Monday, February 29, 2016 by Anonymous

Science
1.) when might preserved remains of an entire organism form? A.) when sediment buries the hard part of an organism B.) when an event such as a quick burial or freezing preserves an entire organism ******* C.) when minerals replace parts of an organism D.) when a thin layer ...
Monday, February 29, 2016 by Zach

science
nitrogen and hydrogen combined in the ratio 14:3 by mass to form amonia molecule.find the formula of amonia molecule by calculating the molar mass (atomic mass of nitrogen = 144.4).
Monday, February 29, 2016 by sachin sharma (sharma ji the rockstar)

Science
Lightning is actually van enormous display of the concept of ?
Monday, February 29, 2016 by Keandra

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