Monday
February 8, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science
1. Which of the following is true about mixtures? (1 point) Mixtures consist of two or more substances chemically combined. Mixtures cannot be separated by physical means. Mixtures consist of only one kind of atom. Mixtures have two or more substances mixed together, but are ...
Monday, January 25, 2016 by Trover

Mathematics,Science(physics,chemistry and biology)
Two similarly charged identical ping pong balls are suspended from the common support with the help of two threads.Calculate angle between the two threads and also calculate the tension in two strings.
Monday, January 25, 2016 by Shhd

science
Which one of the solution have high boiling point 1m H3PO4 or 1m CaCl2 ?
Monday, January 25, 2016 by SERHED

science
calculate the temperature of the gas when volume is 12m^3, if initially the volume was 8m^3 and its temperature was 30 °c.calculating by using charles laws.
Monday, January 25, 2016 by Blessings

Maths Literacy,Tourism, Geography and Life science
Which type of Job can I get while doing General Subjects and which course can I take in University or college?
Monday, January 25, 2016 by Qaqamba

computer Science
1. Create a program which will allow the user enter ten numbers. The program is to count how many numbers were above 50. Hint: You will need to incorporate a Selection (If…then) statement.
Monday, January 25, 2016 by Jhon

U.S. History (Check, Please!)
What was the significance of the Soviet Union's launching of Sputnik in 1957? A: The Soviet Unions's launching of Sputnik in 1957 led Congress to create the National Aeronautics and Space Administration (NASA) to coordinate research in rock science and space ...
Sunday, January 24, 2016 by Victoria

science
if your doing an experiment about if sugar or salt will caused fermentation within the yeast.and you have Cup 1 with 2 cup of warm water ;2tsp of yeast and 2tsp of salt. Than cup 2 contains warm 2 cups of water:2tsp of salt and 2tsp of yeast Finally cup 3( this is the control ...
Sunday, January 24, 2016 by Riley

Science
Briefly Describe A Suitable Laboratory Procedure Of Seperating A Mixture Of Nacl,Nh4cl,Pbcl2
Sunday, January 24, 2016 by Damilola

science
A book is on top of a table.Earths gravity exerts a constant force of 15 N on the book.why does the booj not move as a result of this force ? An object is traveling in a straight line in space. No firces are,affecting it. What will happen to the objects motion? Two race cars ...
Sunday, January 24, 2016 by tahani alkhatib

science
which of these is an example of a force being applied? A car was stuck in the mud. Two people pushed the car, but it did not move.why did the car not move even though a force was exerted on it?
Sunday, January 24, 2016 by tahani alkhatib

science
A spaceship of mass 2000kg is moving towards planet Earth. Calculate the magnitude of the force that the earth exerts on the spaceship when the spaceship is 100km above the surface of the Earth. The Earth has a mass of 6*10 to the power of 24 kg and a radius of 6,4*10 to the ...
Sunday, January 24, 2016 by zama

science
A minibus of mass 3000kg,travelling at a speed of 30m.s to the right,collides with a car of mass 1600kg,travelling at 16m.s to the right. After collision the car continues to travel to the right at a speed of 17,2m.s. Calculate the speed of the minibus immidiately after the ...
Sunday, January 24, 2016 by zama

Science
A bear is running behind you, and there is a 19m pit in which you jumped in order to be saved. If your jump was 0.6 m high and you took 2 seconds time to fall into that pit. What's the colour of the Bear?
Sunday, January 24, 2016 by Sreelalitha

Science
All about vector
Sunday, January 24, 2016 by Aschin

science
what mass of silver nitrate will react with 5.85g of sodium chloride to produce 14.35g of silver chloride and 8.5g of sodium nitrate,if the law of conservation of mass is true?
Sunday, January 24, 2016 by Anonymous

computer science
Create a program that uses the preceding formula and displays the result, but this time, prompt the user for the values a, b, x, and y. Use appropriate variable names and naming conventions.
Sunday, January 24, 2016 by poohboi

maths literacy,life science, tourism,geography,English, Afrikaans,L.O
what career path should i take with these subjects
Sunday, January 24, 2016 by Ashler

science
what temperature must a gas at 0 degree Celsius if its volume is to double while its pressure remains the same ?
Sunday, January 24, 2016 by jhen

Science
In a vacuum the coloured particles would move very quickly... why did they move so much more slow in your solutiin.
Saturday, January 23, 2016 by Davian mullings

Science
It has been hypothesized that chloroplasts originate from photosynthetic cyanobacteria that became symbiotic inside a host cell.Which of the following observations provides the strongest evidence for this suggestion. A. Microscopically, chloroplasts appear similar to ...
Saturday, January 23, 2016 by Tessy

science
Large craters are visible on the moon but not common on the earth's surface. Which of the following is the beady explanation of why large craters are not evident in the earth's surface in photos taken from space. A.three quarters of the earth's surface is covered ...
Saturday, January 23, 2016 by Tessy

Science
New seafloor rock is continually being formed at mid-ocean ridges and old seafloor rock is continually removed at ocean trenches. If the rock on the continents compare with the age of the oldest rocks on the seafloor ?
Saturday, January 23, 2016 by SHABRAELNN

science
Which of the following factors is the most likely explanation for an energy deficit that results in exercise-induced exhaustion. A.Insufficient protein production B.Insufficient mitochondrial function. C.Impair urea elimination. D.Absence of oxygen transporters on the membrane...
Saturday, January 23, 2016 by Tessy

Science
How to find the amount of diploid cells, haploid number of chromosoems, and number of autosomes
Saturday, January 23, 2016 by Anonymous

science
HNO3+HI->NO+I2+H20
Saturday, January 23, 2016 by piyush

Science
An airplane from rest accelerates on a runway at 5.50 m/s2 for 20.25s until it finally takes off the ground. What is the distance covered before take off?
Saturday, January 23, 2016 by Jonna mae

Science
Sometime ago Ununseptum was discovered. However, why was element 117 not considered an element at that time?
Saturday, January 23, 2016 by Aster Calico

science (chemistry)
How does salt affect the boiling point of water? (in simple words)
Friday, January 22, 2016 by ayeza

science
What is the name for the coil of wire around a ferromagnetic material?
Friday, January 22, 2016 by lucas

science
if your doing an experiment about if sugar or salt will caused fermentation within the yeast.and you have Cup 1 with warm water ;yeast and sugar than cup 2 contains warm water:salt and yeast Finally cup 3 you have warm water and yeast will cup 3 be the control group or will ...
Friday, January 22, 2016 by Riley

Science 5
The path that energy & nutrients follow is an ecosytem is called an
Friday, January 22, 2016 by Leila

engineering science
calculate the work done required to push a car for 420 meters up an melon the force required to push the car is equal to 615n
Friday, January 22, 2016 by brian

Science
Which of the following is not an atom found in household bleach (Na0CL)? 1) Sodium (Na) 2) Chlorine (Cl) 3) Hydrogen (H) 4) Oxygen (O) My answer it's 4 correct me
Friday, January 22, 2016 by Jacky

Science
Which of the following is pure substance? Chocolates milk Orange juice Seawater Hydrogen peroxide I'm not sure what's the right answer!!
Friday, January 22, 2016 by Jacky

Science
A 0.44 kg mass at the end of a horizontal spring is displaced 1.5 m and released, then moves in SHM at the end of the spring of force constant 2 N/m. Find the potential energy of the system when the spring is stretched 0.9 m. The acceleration of gravity is 9.8 m/s2 . Answer in...
Friday, January 22, 2016 by Emma

science
The length of an aluminium bar of length 80 cm increases by 1 mm on heating.What is the final temperature of the bar if it was initially at temperature 20 degree Celsius? (coefficient of linear expansion of aluminium =25*10-6/degree Celsius)
Friday, January 22, 2016 by jessica

science
the length of an aluminium bar of length 80 cm increases by 1 mm on heating. What is the final temperature of the bar if it was initially at temperature 20 degree celsius? coefficient of linear expansion of aluminium =25*10-6/ degree celsius
Friday, January 22, 2016 by jessica

management science
strasse investors buys real state , develops it,and ressels it for a profit. a new property is available ,and bud strassel, the presedent and owner of strassel investors, believes it can be sold for $160,000
Friday, January 22, 2016 by zerihun

Science
A 0.44 kg mass at the end of a horizontal spring is displaced 1.5 m and released, then moves in SHM at the end of the spring of force constant 2 N/m. Find the potential energy of the system when the spring is stretched 0.9 m. The acceleration of gravity is 9.8 m/s2 . Answer in...
Friday, January 22, 2016 by Emma

Science
A space probe on the surface of Mars sends a radio signal back to earth a distance of 8.66x0^7 km. Radio waves travel at the speed of light (3:00x10^8 m/s . How many seconds does it take the signal to reach earth
Thursday, January 21, 2016 by Sherri

Science
1. Glucose is a simple sugar made up of carbon, hydrogen, and oxygen. What kind of molecule is glucose? A) Glucose is protein B) Glucose is a nucleic acid*** C) Glucose is an organic molecule D) Glucose is an inorganic molecule 2. Glucose is a simple sugar. It would most ...
Thursday, January 21, 2016 by orangygirl

Science help
Is a solar powered water filter considered a innovation a solution or what?
Thursday, January 21, 2016 by smart1111

Science
A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth
Thursday, January 21, 2016 by Sherri

Science
Describe how changes in society's attitude toward people in wheelchairs may have led changes in the wheelchair available to people who need them.Were these changes made using science or technology or both? Thank you.
Thursday, January 21, 2016 by Dj

Science
How science has been used to improve the vehicles that we drive today?
Thursday, January 21, 2016 by Dj

Science
Which is not part of your immune system's response to a disease-causing organism? Answers: A. Vaccination B. Recognition C. Disposal D. Immunity My answer: D
Thursday, January 21, 2016 by Suzy-- Su-Ji

science
i was ask to make an insulator cold how do i do that
Thursday, January 21, 2016 by adeife

science
how do i make use of matter to make an insluator
Thursday, January 21, 2016 by adeife

Science
I would really appreciate help! Compare renewable and nonrenewable energy sources, and discus the effects of each on biodiversity. (I need about 6 sentences) (I have tried thinking about it and cannot seem to figure it out)
Thursday, January 21, 2016 by May

science
find the gravitational force exerted by the sun on a 70 kg man located at the earth's equator a)at noon when the man is closest to the sun. b)at midnight when he is futherst from the sun. c)calculate the diferrence in gravitational acceleration due to the sun between noon...
Thursday, January 21, 2016 by albert

Science
I am doing an experiment at school to make magnesium chloride. We are using Bunsen Burners, HCl acid and I am using magnesium carbonate. Would the only control variables in the experiment be the volume of acid, the acid type and the base type? Pls help asap :D
Thursday, January 21, 2016 by Stoof

Science
Miss sue can you check these thanks. which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists...
Thursday, January 21, 2016 by New student

SCIENCE ASAP HELP PLEASE
which of the following features make earth and venus similar to each other ? A . their size and mass b. their rates of rotation c. their atmospheres d. their directions of rotation****
Thursday, January 21, 2016 by Courtney

science
How do animals find their shelter?
Thursday, January 21, 2016 by Lena

science
how many ml of 6M HCl solution are required to bring the pH of 10 ml of a 4M NaOH solution to 2.0
Thursday, January 21, 2016 by Razakou Maman

Science physic
What is the magnitude of the average force thet the athele exterts on a landing pad if it's 1.5 m high and deforms by 0.5 Mass of athele= 60kg Centre of mass is 1m
Thursday, January 21, 2016 by Jackson

Science
What are some similarities and differences between spider food chains and snakes food chains?
Wednesday, January 20, 2016 by Royal

science
Part A Draw a picture of an object that might impact a planet. Part B What evidence is there that these objects collide with planets and moons?
Wednesday, January 20, 2016 by Kaylah

Science
How much longer will it take for sound in air to travel 10km than in water
Wednesday, January 20, 2016 by Tim

physical science ,maths ,life science,geography
Which marks I must get to become a doctor?
Wednesday, January 20, 2016 by Nosihle

Science
1. Which of the following is the most effective way to preserve biodiversity? A. Captive breeding B. Habitat destruction C. Habitat preservation *** D. Habitat fragmentation 2. Which of the following describes the use of a renewable form of energy? A. using natural gas to heat...
Wednesday, January 20, 2016 by Cait

Science
In humans the allele for curly hair and the allele for straight hair show incomplete dominance. If two people with wavy hair have offspring, what percentage of their offspring would you expect to have wavy hair? A.) 100% B.) 75% C.) 50% D.) 25% Would it be 50%?!
Wednesday, January 20, 2016 by Lexi

Science
1.which of the following describes scientific inquiry? (1 point) a statement that describes what scientists expect to happen in an experiment facts, figures, and other evidence gathered through observation the diverse ways in which scientists study the natural world a well-...
Wednesday, January 20, 2016 by Charlie Shuler

maths and science
The first term of a geometric sequence is 125÷4,the last term is 2, and the sum of the associated series is 203÷4. What is the common ratio and how many terms are there in the series?
Wednesday, January 20, 2016 by nitchelence

Science
1.)Check My Answers, please? Which of the following planets is considered a rocky, or terrestrial, planet? A.)Venus **** B.)Neptune C.)Saturn D.)Uranus 2.)Which of the following statements about the beginning of the solar system is true? A.)The planets that formed closest to ...
Wednesday, January 20, 2016 by YRN DJ

science
If the net force on an object is 0 N, the forces are considered unbalanced. True or false?
Wednesday, January 20, 2016 by Amber

Physical science
The density of lead is 11.35 g.cm .what will be the mass in kilograms of a 2dm sample of lead?
Wednesday, January 20, 2016 by Lindokuhle

science
find the rotational inertia about the symmetry of axis of a thick cylinder of mass M.take the inner radius to be R1 and the outer radius to be R2
Wednesday, January 20, 2016 by Sifensa Bacha

science
what kind of movement is exhibited by gas molecules
Wednesday, January 20, 2016 by chritopher

Math
A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment a. 70 ML of the 50% solution and 35 ML of the 80% solution*** b. 35 ML of ...
Tuesday, January 19, 2016 by Kaai97

Health and science
What problems could a solar powered pond water filter solve and what impact would it have on people?
Tuesday, January 19, 2016 by smart1111

Health and science
Explains the science, technology, engineering and/or mathematics behind a solar cooker that work day and night and how could a solar cooker that works day ajd night both address the everyday problems and have a broader impact locally or globally.
Tuesday, January 19, 2016 by Anonymous

Science
In my US History Unit test number 15 says how do layers B & D compare in age if rock layers between be and D have eroded away what is the boundary between be and D called? I cannot find a graph related to this question
Tuesday, January 19, 2016 by Sshh

Science
Which of the following best describes the result of using a catalyst in a chemical reaction? A. The yield of product is increased. B. A more desirable product is often formed. C. A greater amount of heat energy is released by the reaction. D. The reaction is completed in a ...
Tuesday, January 19, 2016 by Mary

please help
The chart below shows the highest quiz score Cynthia received in four of her classes. Class Highest Quiz Score English 13 out of 14 correct Science 93% Math 25/27 History 0.93- In which class did she have the highest score?
Tuesday, January 19, 2016 by reggie

Science.
Think about renewable sources of energy that are avaible. Which renable energy sources will you use: A. To heat or cool? B. To provide hot water in your home? C.to provide electricity in your home? Can you give a site on renable sources or help me understand? Because Im ...
Tuesday, January 19, 2016 by Sara.

i dont know how to solve this
The chart below shows the highest quiz score Cynthia received in four of her classes. Class Highest Quiz Score English 13 out of 14 correct Science 93% Math 25/27 History 0.93- In which class did she have the highest score?
Tuesday, January 19, 2016 by reggie

Pure maths, Life science, tourism and geography
What are the careers that i might be able to do after school?
Tuesday, January 19, 2016 by Nonhlanhla

Science
the description of the structure of the atom is called the....
Tuesday, January 19, 2016 by Flawless4Ever

Science
I have a exam coming up,my final grade is 67% and I was wondering what would my mark have to be on my exam to overall pass with atleast 75%?
Tuesday, January 19, 2016 by Trenr

science
What would be the volume of hydrogen(2g/mol) needed in a balloon to lift a 50kg man? Assume that the temperature is 300K pressure is 1atm and air has average mass of 29 g/mol and that both gases behave ideally.
Tuesday, January 19, 2016 by Micah

Science(physics)
A spring 20cm long is stretched to 25cm by a load of 50N. What will be its length when stretched by 100N assuming that the elastic limit is not reached? I want the answer abd solving to this question and also the formula for young modulus of elasticity
Tuesday, January 19, 2016 by Rachel

health
what education is required for dentist? Do i put answer like math, science what certain certificate do you need for this job? Do i put Bachelor's Degree?
Tuesday, January 19, 2016 by miyabi

History,life science,maths lit and geography
I wanna knw if ican become a FIRE FIGHTER with dic sub
Monday, January 18, 2016 by Bono

Science
The length of an aluminium bar of lenth 80cm increase by 1mm on heating. What is the final temperature of the bar if it was initially at temperature 20°C? ( given: coefficient of linear expansion of aluminium = 25×10-6/° C)
Monday, January 18, 2016 by Chanchal

Science
The speed of light in a plastic material is 1.4 x 10^8. What is the index of refraction of the material?
Monday, January 18, 2016 by Jerome

Science
Why are gender roles considered socially constructed, according to the text? (Points : 1)
Sunday, January 17, 2016 by Anonymous

philosophy
Russell is arguing that philosophy is valuable. You'll want to think about his argument using his own key ideas: •How does he think philosophy is different from science? •Does he think philosophy is different from science in a good or bad sense, like one is ...
Sunday, January 17, 2016 by Morgan

Science Help
What happens to the density of the air in the balloon as it is heated?
Sunday, January 17, 2016 by Sam

Maths lit, geography ,agricultural science. Life science
Hi iam a grade 11 learner at khumbula senior high school , i want to know which career path do i take with this subjects ?
Sunday, January 17, 2016 by Nothando C

Maths lit, geography ,agricultural science. Life science
Hi iam a grade 11 learner at khumbula senior high school , i want to know which career path do i take with this subjects ?
Sunday, January 17, 2016 by Nothando chibi

math literacy,english,afrikaans,l.o,l.s,bus
Can you become a social worker with the following subjects maths literacy, english,afrikaans,life orientation,life science,business and history are can you tell u what can you become with that subjects above
Sunday, January 17, 2016 by prisca munsha

science
a runner travels 3 kilometers in 30 minutes. what is the speed of the runner
Sunday, January 17, 2016 by Josephine

maths literacy,life science,history,agricultural science
people can you plz help me what can I study after matric,anyone who could help me?
Sunday, January 17, 2016 by loyiso

science
A cannon, mass 500kg, fires a bullet, mass 100kg, horizontally so that the velocity of the bullet is 100m.s^-1 to the right. calculate the recoil velocity of the bullet
Sunday, January 17, 2016 by anonymous

physical science
what will the velocity be if the momentum is 60000 kg m/s and the mass of the car is 2000kg
Sunday, January 17, 2016 by bandile

science
A gas at atmospheric pressure is compressed isothermally to one third of its volume. What is final pressure?
Sunday, January 17, 2016 by Anjali

computer science visual basic
I need help Application: Create a GeneratedNumber application that stores in an array with indexes 1 through 100 numbers generated by the index values when Generate is clicked. Generate the number to be stored at each index by summing the index and it's individual digits. ...
Saturday, January 16, 2016 by Ace

Science
A boy moves on a skateboard at a constant velocity of 3m.s . The combined mass of the boy and the skateboard is 40kg. He catches a bag of flour of mass 5kg that is thrown to him horizontally at 6m.s . Determine the velocity of the boy after catching the bag of flour.
Saturday, January 16, 2016 by N

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