Tuesday
May 31, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

physical science
John is using a pulley to lift the sail on his sailboat. The sail weighs 150 N, and he must lift it 4.0 m. How much work must be done on the sail?
Monday, May 16, 2016 by bob

science
A ball of mass 0.5 kg is released from rest at a height of 30 m. How fast is it going when it hits the ground?
Monday, May 16, 2016 by jose

science
A man throw a stone over a cliff and hear it strikes at the bottom after 8.00sec the temperature is 25 celsius. What is the height of the cliff in km.
Monday, May 16, 2016 by Aloysious

Science
Luster, Malleable, Ductile, Conductor, Solid at room temperature: Which element could be described by the list of properties above? A) magnesium B) mercury C) neon D) phosphorus***
Monday, May 16, 2016 by CoolDude

science
If Faraday hd used a more powerful battery in his experiments with electromagnetic induction, what affect would this have had on his galvanometer's measurements of current when the battery was fully connected? explain your reasoning. Thanks again!
Monday, May 16, 2016 by Katie

science
Describe how turning off the electric current in an industrial magnet affects its magnetic field. Thanks!
Monday, May 16, 2016 by Katie

Science
What happens to energy and matter during a chemical reaction?
Monday, May 16, 2016 by Pickle

Science
State the reagents that can be use to prepare the following salt potassium chloride(Kcl)
Monday, May 16, 2016 by Mcbright Tete Nyinaku

mathematics, science, accounting
Can a right-angled prism of clear ice be used for total internal reflection of right through 90degrees, bearing in mind that Ice has a critical angle of 48,8degrees?
Monday, May 16, 2016 by CONNIE

Science
Historical models of the solar system include: A.Helliocentric,B.nebular,C.Geocentric model or earth centered universe and a _ model or sun centered universe
Monday, May 16, 2016 by Hailey

science
For your discussion assessment, you will present your proposal of a device that minimizes heat transfer.
Monday, May 16, 2016 by jai

natural science
we must combine sodium carbonate with which acid to get sodium sulphate?
Monday, May 16, 2016 by Junior

Physical science
An alpha particle is identical to A) a neutron B) a helium nucleus C) an electron or D) a hydrogen nucleus
Sunday, May 15, 2016 by Angela

science
A gaseous compound containing carbon and hydrogen was analyzed and found to cons ist of between 80 and 90 percent carbon by mass. At 145ºC and 1.00 atm, the density of this compound is 2.45 g/L. What is the molar mass of the compound?
Sunday, May 15, 2016 by Anonymous

Science
The temperature of a silver bar rises by 10. 0°c when it absorbs 1230 jof energy by heat. The made of the bar is 525 g. Determine the specific heat of silver.
Sunday, May 15, 2016 by Kathryn Moore

Science
1. Massive amounts of destructive energy are released when a nuclear fission bomb explodes. Where does that energy come from? a) A chain reaction occurs when uranium atoms split, releasing nuclear energy. b) Molecules break down, releasing chemical energy. c) Hydrogen atoms ...
Sunday, May 15, 2016 by Lez

Science (chemistry)
If 1mile of methane(CH4) is releases 890 kJ/mole, how much energy is released per gram of methane?
Sunday, May 15, 2016 by Ambrosia

Science
Kudzu, a nonnative species, was brought to Georgia for decorative purposes. It is a vine that grows quickly and covers everything in it's path. It can also grow on trees and block the sunlight. How is kudzu an environmental issue for Georgia?
Sunday, May 15, 2016 by Kirsten

science
1 evaluate the market failure in south Africa 2 base your argument on south african context and also outline its effects thereof 3 evaluate at least four types of market failure and also how the government should correct the market failure 4 use appropriate examples, pictures ...
Sunday, May 15, 2016 by unarine

science
a body is thrown upward with velocity v . the height at which P.E is one third of K.E is ? answer is in terms of v
Sunday, May 15, 2016 by Wilbur

Science
If too much of an unsaturated fat is added to bromine water, could this affect decolourisation of bromine water? All help is appreciated... > C >
Sunday, May 15, 2016 by Stoof

Science
The moon is about 384000 km the earth and its paths around earth is circular. The moon taken 24hr to complete one orbit. The speed at which the moon orbits the earth in km/ hour is
Sunday, May 15, 2016 by Ali

Science
Calculate the density of a 45g nickel weight and a volume of 22 cubic centimeters.
Saturday, May 14, 2016 by Austin

Advance Math,Science
The solubility of sodium chloride is 35.4g of water at room temperature. What mass of sodium chloride can be dissolved in 1kg of water at room temperature?
Saturday, May 14, 2016 by Tabbie

Science
What happens to your speed velocity and acceleration as you run circular laps?
Saturday, May 14, 2016 by Stupid person

SCIENCE
A BOX HAS A BASE SURFACE AREA OF25cm2 AND THE WEIGHT OF 100N.CALCULATE THE PRESSURE IT EXERTS ON THE GROUND.
Saturday, May 14, 2016 by JOY

science
Write a structural program to calculate the average of 10 students in 3 courses. Hint score < 40 fail
Saturday, May 14, 2016 by olu

science
give five application of Doppler effects
Saturday, May 14, 2016 by Anonymous

Life science, Life science and History
I want to be a doctor (immunologist) I'm not sure about the last subject should it be history or Geography
Friday, May 13, 2016 by Wendy

Science
A density bottle weigh 0.25and0.75 when filled with water and 0.65N when filled with alcohol . Calculate the volume of water and alcohol
Friday, May 13, 2016 by Adama

Science
What eletromagnet wave not used for coumintcation plz help
Friday, May 13, 2016 by Cheyenne

science
write a formula for this compound potassium nitrate
Friday, May 13, 2016 by Regina

science
Calculate the kinetic energy in joules of a body of mass 30kg at a velocity of 3ms-1
Friday, May 13, 2016 by maria

science
Which kind of energy transformation occurs when a skater's board falls back to the ramp?
Friday, May 13, 2016 by bob

comprehension science
how can a cyclist minimize friction as he or she rides?
Friday, May 13, 2016 by bob

science
what is the length of a simple pendulum that has a period of 2.8 seconds (g=10)
Friday, May 13, 2016 by emmanuel

Science-Physics
As shown below, a 2.00 kg mass is connected to an unknown mass m via a massless rope and a massless, frictionless pulley. The mass m is on a ramp angled 20 degrees above the horizontal. The coefficients of kinetic and static friction are μk=0.35 and μs=0.45, ...
Thursday, May 12, 2016 by Justin

science 4th grade
What is the property of matter that keeps a moving object in a straight line called
Thursday, May 12, 2016 by Anonymous

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

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