Saturday
August 27, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science
If 100 mL of hydrogen peroxide decomposes how many liters of O2 is formed
Thursday, May 12, 2016 by Sawyer

Science
The human egg cell above is magnified using a 10´ ocular lens and a 40´ high power objective lens. (a) Calculate the overall magnification. (b) If the field of view at high-power magnification is 400 mm, calculate the size of the field of view when the ...
Thursday, May 12, 2016 by HELP ASAP

6th Grade Science - Connections Academy
Why is it important to understand how an ecosystem is organized? (essay)
Thursday, May 12, 2016 by Geek Girl

science
a structure holds a baby. TRUE or FALSE. Explain. Show your work. Doublecheck and be patient.
Thursday, May 12, 2016 by Varsan

Science
Where is most of the surface water on earth found? a) as freshwater in rivers b) as frozen water near the pole c) as groundwater under the surface d) as salt water in oceans I think its either A or D. Am I correct?
Thursday, May 12, 2016 by Val

science
Calculate the ratio of kinetic energies of 3gms of hydrogen and 4gms of oxygen at a given temperature
Thursday, May 12, 2016 by nithya

Science
Some constellations, such as Ursa Minor, are visible in the sky year-round; other constellations appear for only part of the year. Explain why this happens.
Thursday, May 12, 2016 by lifeisgreat

Science
Compare the pH of CH3 COOH and Hcl.
Thursday, May 12, 2016 by Ama Nelson

Science
Give the reagents that can be used to prepare Kcl
Thursday, May 12, 2016 by Ama Nelson

Science
Give the reagents that can be used to prepare CucO4
Thursday, May 12, 2016 by Ama Nelson

science-chemistry
The extent of ionisation in a 0.75M solution of a monoprotic acid is 0.040. calculate Ka
Thursday, May 12, 2016 by shelagh

science
Explain how you would prepare a sulphuric acid solution.
Thursday, May 12, 2016 by Chali

Science
If you are in a spacecraft that has been launched into space, your weight would A) Increase because gravitational force is increasing. B) Increase because gravitational force is decreasing. C) Decrease because gravitational force is decreasing. D) Decrease because ...
Thursday, May 12, 2016 by Rose

science
Why are rainforests the most diverse ecosystems? 1: they are near bodys of water 2: They have a favoritable climate 3: they are surrounded by mountains 4: they have more pollutants than any other ecosystem I think its 2 Am i right?
Thursday, May 12, 2016 by Lol:3

science
what is inertia?
Thursday, May 12, 2016 by prasanna

science
A ball is thrown upwards and reaches the ground once again after 4 sec: (a)calculate the height that the ball reaches (b)the total distance covered by the ball (c)the velocity with which the ball hits the ground
Thursday, May 12, 2016 by sebenano

science
If a bungee rope has a spring constant of 60 N/m. How far will it extend (stretch) if a person who weighs 600N (60Kg) is placed on it?
Thursday, May 12, 2016 by HILL

Physical Science
When sodium metal combines with chlorine gas, solid sodium chloride forms. is this a physical or chemical change?
Wednesday, May 11, 2016 by Larissa

science
Which of the following would decrease the magnetic field around a wire? A) Decreasing the current (MY ANSWER) B) reversing the poles of the wire C) looping a section of the wire into a solenoid D) increasing the current
Wednesday, May 11, 2016 by not a scientist

science
A string with mass per unit length 0.0065 kg/m is used to suspend a 30 kg mass over a pulley. A transverse wave with wavelength 40 cm and amplitude 2.5 mm moves along the string. Determine the maximum speed of a particle on the string.
Wednesday, May 11, 2016 by forest

Science - Please Check
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 ...
Wednesday, May 11, 2016 by Scarlet

Mpindweni s.s.s science
A rocket of mass 5000kg is launched vertically upwards into the sky at an acceleration of 2om/s. The magnitude of the force due to gravity on the rocket is 49000 N calculate the magnitude and diretion of the force of the rocket's engine.
Wednesday, May 11, 2016 by Someleze nelly

Science
3. Which of the following small bodies are the hardest to tell apart because they are made of similar materials? dwarf planets and comets asteroids and comets comets and meteoroids asteroids and meteoroids** A scientist examines a sample of an object from the solar system. ...
Wednesday, May 11, 2016 by lifeisgreat

Science
1. How do scientists classify small objects in the solar system? by size by shape by size, shape, and temperature by size, shape, and composition** 2.Which of the following categories of small bodies in the solar system does Ceres belong to? dwarf planets** comets meteoroids ...
Wednesday, May 11, 2016 by lifeisgreat

science
Ki reacts with kio3 to give i2 then find mass ofkio3required to completely react with 83gram of ki???
Wednesday, May 11, 2016 by mayur

Science
I want to determine how fast can the engine be lifted up!
Wednesday, May 11, 2016 by Hohenzollern

Science
1.) How does natural gas have a impact on our economy by? 2). How does coal have a impact on our economy by? 3). How dies nuclear electric power have a impact on our economy by?
Wednesday, May 11, 2016 by Helllllp meee please lol

Life science,,maths lit,economic,business study
Which career field i have to follow?
Wednesday, May 11, 2016 by Anonymous

Maths lit, life science,business study,economic
Wich career i have to choose
Wednesday, May 11, 2016 by Pike

science
How did student , most probably measure the volume of 10 glass marbles?
Wednesday, May 11, 2016 by nana

pysical science
An automobile with a mass of 1258 kg accelerates at a rate of 5 m/s² in the forward direction. What is the net force acting on the automobile?
Wednesday, May 11, 2016 by shay

science
what is the enthalphy change for the formation of 1.00 gram of waater vapour from hydrogen and oxygen
Wednesday, May 11, 2016 by sphesh

Science
A banana turning brown when exposed to air is an example of. And the options for me are. A heterogeneous mixture, vaporization, a chemical change, an amorphous solid.
Tuesday, May 10, 2016 by Saige

science
A mass of o.8 kg water at 25c is mixed with m kg of boiling water.The resultant temperature is 40c.Then find m is
Tuesday, May 10, 2016 by William

Maths lit, life science, economics, geography
hey, I want to do medicine and civil engineering is this subjects are right? If not please tell me which career i can go to with this subjects after my matric? Thanks
Tuesday, May 10, 2016 by Lisa

Science
What is vectors?
Tuesday, May 10, 2016 by Rolz

science
Can somebody help me understand batteries? I'll explain what I know, then, you can tell me if I'm right or wrong. I know that a battery consists of three main parts: the anode, the cathode, and an electrolyte. The anode is electropositive and the cathode is ...
Tuesday, May 10, 2016 by Maddy

Science
Is it fair that one athlete could beat another because of the kind of clothes he or she is wearing? Why?why not?
Tuesday, May 10, 2016 by Rochelle

Science
Arrange the steps required to focus a compound light microscope on low power in the correct order. Then write the numbers for the steps in the blanks. 1. Viewing from the side, raise the stage so that the slide almost touches the lens. 2. Move the low power objective lens ...
Tuesday, May 10, 2016 by Hanny

science
What is the pathaway and processes of ingestion involved when a person has eaten a buttered polony sandwish?
Tuesday, May 10, 2016 by Sharon

science
When I push on my refrigerator, there is a force acting on it that wasn't there before. That means it should be experiencing an unbalanced force and begin to move. Why doesn't it?
Tuesday, May 10, 2016 by Jaz

science
When I push on my refrigerator, there is a force acting on it that wasn't there before. That means it should be experiencing an unbalanced force and begin to move. Why doesn't it?
Tuesday, May 10, 2016 by Anonymous

Science PLEASE CHECK ALL
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...
Tuesday, May 10, 2016 by Karen

science
Three year ago, Tom brought $750 worth if stock in a software company. Since then the value of his purchase has been increasing at an average rate of 123/5% per year. How much is the stock worth now? 0.126 x 750 ?
Tuesday, May 10, 2016 by Ty Antone

Science
Arrange the steps required to focus a compound light microscope on low power in the correct order. Then write the numbers for the steps in the blanks. 1. Viewing from the side, raise the stage so that the slide almost touches the lens. 2. Move the low power objective lens into...
Tuesday, May 10, 2016 by Hanny

Science
What effect does colored filter has on red,yellow and pink flowers?
Tuesday, May 10, 2016 by Jagnarine

Science
So I did a science experiment and I have to wrap a coil wire around a nail and tap the other end to a battery. Then see how many paper clips will stick to the nail, and I had to wrap more coil wire around the nail over time and stuff and record the data. Now I must choose the ...
Tuesday, May 10, 2016 by Anonymous

Science
Together, satellites and ground receivers enable people using ______ to pinpoint their geographic location.
Tuesday, May 10, 2016 by Rylee

Science
What effects does Coloured Filters have on Red,Yellow and pink flowers?
Tuesday, May 10, 2016 by Jagnarine

Science
A particle moves along the parabola y = x^2 such that the x-component of velocity is always 2m/s. The acceleration of the particle is
Tuesday, May 10, 2016 by Upinder

Science
What is vector?
Tuesday, May 10, 2016 by Rolz

science
Find the initied valocity it which stop in 25 second the retidation produce in atrain is 1.2metersqure
Tuesday, May 10, 2016 by siddique

Science
I have the 1st part of final tomorrow, how can I study it'll be a multiple choice test. Need help asap!
Tuesday, May 10, 2016 by Eliabeth

science
Calculate the no of neutrons present in 12x10^25 atoms of oxygen (8O^17)?
Monday, May 9, 2016 by Rishikant

Science CHECK ALL
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...
Monday, May 9, 2016 by Karen

Science
A squirrel drops an acorn from a tree.How does potential energy of the acorn compare to its kinetic energy just before the acorn hits the ground
Monday, May 9, 2016 by Cammy

Science
What do astronauts take to space/what materials do they need and use? Plz help ASAP i cant find enough information and i need 40 bulletpoints by tomorrow!
Monday, May 9, 2016 by Jelena

Check my answers? Science
The order of events and ages of rocks by examining positions is *relative dating*. Gaps in rock layers are called *unconformities*. What uses properties of atoms to find ages of rocks? *Absolute Dating*. A life form in Precambrian Time was *Cyanobacteria*. What signaled the ...
Monday, May 9, 2016 by Ava

math,science
A car traveling at 22 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is its acceleration?
Monday, May 9, 2016 by Ally

physical science
A car traveling at 22 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is its acceleration?
Monday, May 9, 2016 by Shannah

science
A wire of length 1m has resistance of 10 ohm.if its length become 2m by stretching it then what is new value of resistance?
Monday, May 9, 2016 by AYUSHI

science
How are continental glaciers different from valley glaciers
Monday, May 9, 2016 by cory

Science
Based on the density of the wood V=15.625 m=10.00 D=.64g/cm3, would the wood float or sink if it is placed in a bowl of water? Explain your answer. Remember that the density of liquid water is 1.00 g/cm3.
Monday, May 9, 2016 by Gunner

science
how many electrons are trasfered if a liquid has a on 7,5×10-19C
Monday, May 9, 2016 by Anonymous

science
two forces each of magnitude 10newton act in opposite direction at the end of the table if the length of the table is 50centimeter calculate.The resultant force and moment acting on the table.
Monday, May 9, 2016 by habeeb

science
the density of o2 at NTP is 1.429g/l.calculate standard molar volume of the gas?
Monday, May 9, 2016 by dev

science
Imagine that you are standing in the shallow end of a swimming pool, you look ahead at the bottom of the pool and see a coin, Describe the difference between where the coin appears to be and where it actually is. a clear plastic cube, with exactly the same index of refraction ...
Sunday, May 8, 2016 by HolfBrincl

Science one question dont understand plz help ASAP
What will my instruments need to do? (You don’t have to have special names. If you know what kind of data you want to collect, you’ll know what the instruments need to do. Don’t forget that you may need to store samples or other information and find a way to get...
Sunday, May 8, 2016 by Thikra

science
calculate number of oxygen atom in 2 mol sulphuric acid.
Sunday, May 8, 2016 by shyam

science
The measured density oe He at NTP is 0.1784g/l.what is the weight of one mole?
Sunday, May 8, 2016 by dev

science
The density of o2 at NTP is 1.429g/l.calcute standard molar volume of gas?
Sunday, May 8, 2016 by dev

science
How does graphite burn in air to give carbondioxide
Sunday, May 8, 2016 by simon

maths,science,geography and life science
What is restorative justice intention in process of human rights?
Sunday, May 8, 2016 by veronica

Computer science
How is creating a virtual ecosystem similar from the real world?
Sunday, May 8, 2016 by Andrew

Science
A cyclist of total mass 85 kg maintains a constant speed up an inclined plane. the plane is inclined at 20 degrees to the horizontal. with frictional force of 120 N. the cyclist covers a distance of 50 m along the inclined plane in 20 s. 1. Calculate the work done by the ...
Sunday, May 8, 2016 by Zade

Science
I'm writina a speech about a mythical character/legendary whom you admire
Sunday, May 8, 2016 by Palesa

Computer science (please help)
How is a creating a virtual ecosystem different from the real world?
Sunday, May 8, 2016 by Angelica

PHYSICAL SCIENCE
A BALL IS DROPPED (V=0) FROM A TOWER 7 M HIGH. HOW FAR WILL THE BALL HAVE FALLEN AFTER AA TIME T1=1 S, T2=2S AND T3 = 3S.
Saturday, May 7, 2016 by KC

Science
How far away from the pinhole should you move the screen to obtain a 5cm high image of a girl who is 125cm tall and stands 250cm away from the camera?
Saturday, May 7, 2016 by Ria

Science
How is creating a virtual ecosystem similar and different from the real world?
Saturday, May 7, 2016 by Ashton

science
how do you feel when you are pregnent
Saturday, May 7, 2016 by mbali

science
A car travels West for 20min at 80km/hr and in direction 45NW at 30km/hr for 6min. Calculate the Total distance covered/ displacement of the car/ average speed/ average velocity.
Saturday, May 7, 2016 by stanleylasbrey

Science
The sky is mostly blue, with some high, thin, feathery clouds. Which type of weather is most likely to occur? A. Light drizzle,**** B. Heavy precipitation, C. fair weather D. thunderstorm I say A. because the sky is mostly blue.
Saturday, May 7, 2016 by Howie

science
Explain briefly how pure dry crystals of calcium chloride could be obtained from a solution of calcium chloride.
Saturday, May 7, 2016 by Assan Joof

science
A program that will calculate average marks for five students using multi dimensional array in vb
Saturday, May 7, 2016 by clayton

Science
A student goes to college,driving his car at 20 km per hour. He returns though same route ,driving at 40 km per hour . Find average speed during entire journey
Saturday, May 7, 2016 by Riya

Science
How test tube babies are born?
Friday, May 6, 2016 by Maria

Biology/science
How is creating a virtual ecosystem similar and different from the real world?
Friday, May 6, 2016 by Damien

Science
What are the systems that move the body?
Friday, May 6, 2016 by Marwas

science
why do we put salt on sidewalks when it snows?
Friday, May 6, 2016 by bob

Science
For your discussion assessment, you will present your proposal of a device that minimizes heat transfer.
Friday, May 6, 2016 by Aidyn

science
This isn't a question, but I noticed that over half the questions don't even get answer...
Friday, May 6, 2016 by Tell All Bob

Science
I have a project for science and we have to design an experiment to support the hypothesis that light travels in straight lines except at the point it enters a new medium. Does anyone have any examples I could use for this project?
Friday, May 6, 2016 by Twenty One Pilots fan

science
I believe the angle of refraction will be ___________ when it goes from a ________ to a _______________ because ____________________________________. Please help
Friday, May 6, 2016 by anonymous

science
The gas-phase reaction, A2 + B2 --> 2AB, proceeds by bimolecular collisions between A2 and B2 molecules. If the concentrations of both A2 and B2 are doubled, the reaction rate will change by a factor of.....? Will you please explain instead of just giving me an answer. thanks
Thursday, May 5, 2016 by pepe

maths science
a mixture of 0.5 mol H2(g) and 0.5 mol 02(g) is allowed to react in a container of volume 200 cm3 .represent in the table
Thursday, May 5, 2016 by josephine

science
A stone projected at an angle of 60 degree and intial velocity of 20 meter second determing the time of flight
Thursday, May 5, 2016 by abdullahi

Science
How do I prepare 15% mercuric sulphate in 15% sulphuric acid?
Thursday, May 5, 2016 by Deovolente

Science
Early this spring researchers have recently discovered that there is one small remnant population of endangered bluegrass left in a small prairie plot outside of Kansas City. If there are approximately 850 individuals in the cohort, how many individuals can the researchers ...
Thursday, May 5, 2016 by Anonymous

science
A sled is tied to a tree on a frictionless snow covered hill,as shown.If the sled weighs 77N ,1)Find the magnitude of the tension force T exerted by the rope on the sled .2)Find the magnitude of the normal force applied by the hill on the sled.MY WORK IS AS FOLLOWS T-Wx=0. T-...
Thursday, May 5, 2016 by ZENANDE

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