Friday
April 29, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

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

maths literacy, history, grography, life science
What are careers of general geography?
Saturday, January 16, 2016 by kabelo

earth science
During the early Paleozoic era, South America, Africa, Australia, Antarctica, India, and perhaps China comprised the vast southern continent of _____. (1 point) Europe Gondwana Laurasia Pangaea
Friday, January 15, 2016 by freddy

Science (physics)
How does temperature affect the gas in a balloon?
Friday, January 15, 2016 by Abby

SCIENCE HELP PLS
The density of gas particles in a section of Earth’s atmosphere decreases. Which of the following is the most likely explanation for this event? The air pressure in that section of Earth’s atmosphere decreased. The air pressure in that section of Earth’s ...
Friday, January 15, 2016 by Oscar

science
The following forces act on a body:f1=5,3N upwards;f2=2,2N upwards and f3=10,7N downwards.determine the resultant of the three forces using vector addition
Friday, January 15, 2016 by pleasure

Science
a simple machine that only changes the direction of the applied force?
Friday, January 15, 2016 by Meek

Pure Maths, Life Science, CAT, Business Studies
I would like to know that with these subjects what can I study at University , so can you please help me with that?
Friday, January 15, 2016 by Sihle Grati♥

Maths literacy and tourism,life science,geography
Hi help me I do not know what job I can do with these subjects
Friday, January 15, 2016 by Owami Dube/zikhali

science
On heating 10grams copper sulphate crystals (CuSO4.5H2O),6.4 grams anhydrous sulphate was left .Find the value of X .
Friday, January 15, 2016 by Kishan singh

science
what wt. of hno3 is required to make 1lt. if 2N solution to be used as an oxidising agent 3cu+8HNO3=3cuno3+2NO+4H2O
Friday, January 15, 2016 by anil

Math literacy, Geography, Life science, Agriculture
Which career path can i follow with the subject above
Friday, January 15, 2016 by Tekanyo

science
I really need help, I don't understand the question from my science assignment. If anyone is available that would be great.
Friday, January 15, 2016 by panda kahindo

science
How much energy would be required to raise the temperature of 1.25g of water from 17 to 31 degree celsius.
Friday, January 15, 2016 by panda kahindo

Science help please.....
What happens to the density of the air in the balloon as it is heated? Also, based on this question.... What would be the Independent variable, Depended Variable, controlled Variab
Thursday, January 14, 2016 by Diana

science
which of the following is a constant, or control variable, in this experiment?
Thursday, January 14, 2016 by Brooke

science
Does carbon dioxide or water have a higher boiling point and why?
Thursday, January 14, 2016 by Kelley

Science
Without this system in the body, you would get really sick because toxins and waste would build up? (A) Cardiovascular (B) Excretory (C) Integumentary (D) Muscular I think its A, I really need this answered.
Thursday, January 14, 2016 by I need help

Science
What will happen when the sun is exposed to oxygen
Thursday, January 14, 2016 by TRYSYENS

science
Na+H2o->NaOH+H2
Thursday, January 14, 2016 by Mirale .A.Dayen.

Science
Which of the following determines the type of biome classification that will be made for a particular region? Climate Size Mineral deposits Number of human settlements Think about how the amount of energy changes as you move stepwise from producers to primary consumers to ...
Thursday, January 14, 2016 by Abby

Science
Which of the following can be used to explain why fossils of the same kind of organisms can be found in different regions of the world? Biogeography Adaptation Continental drif Dispersal Which of the following would best explain why a species of wildflower native to ...
Thursday, January 14, 2016 by Abby

Science
Certain seismic waves travel as.. A) electromagnetic and transverse waves. B) visible light and longitudinal waves. C) longitudinal and transverse waves. D) compression and visible light waves. I have no idea I never learned this:(
Thursday, January 14, 2016 by Anon

Science
When the energy of a light wave is transferred to a particle and causes it to vibrate and generate heat, the energy of the light wave is.. A) absorbed B) reflected C) refracted D) transmitted D?
Thursday, January 14, 2016 by Anon

science
When_____forces act on an object, they cause the object to move. A. Balanced B. Unbalanced C. friction D net B?
Thursday, January 14, 2016 by Amber

science
Which direction will the box move in the diagram below? (Its a square in the middle and it has a long arrow pointing to it on the left side which is 5 N and then on the right side theirs a short arrow pointing to it which is 3 N) A. It will move to the left. B. It will move to...
Thursday, January 14, 2016 by Amber

physical science
When will the resultant of the two vectors be at a maximum?
Thursday, January 14, 2016 by maliviwe

Science
Hi if you know about static electricity can you explain how lightning strikes form? Can you think about when lightning occurs to formulate your answer to my question please. Thank you so much!!!
Thursday, January 14, 2016 by Rosey

Physical science and math
2a^2*3a^3*b^0
Thursday, January 14, 2016 by Sindiswa

Physical science and math
2x^2y.4x^4y^3/6x^6y^6
Thursday, January 14, 2016 by Sindiswa

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