Wednesday
August 24, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

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

Science HELP
Placental mammals develop _______ A) In an egg laid in water B) A pouch of their mother's body C) Inside the mother's body**** D) Inside an amniotic egg
Thursday, January 14, 2016 by Miranda Lambert

Math literacy,Life science,Geography and Tourism
Im a grade ten learner and ii wud really like to know,uhm which careers will this subjects give me..im confused
Thursday, January 14, 2016 by Makgotso

Science
Two forces of 60N and 80N act simultaneously at a point dertermine their resultant by using tail to head method
Thursday, January 14, 2016 by Machanics (forces)

Maths,Geography,life science
I am a grade 11 learner doing maths,life science,geography . What causes do my subjects fit
Thursday, January 14, 2016 by Ntando

Maths,Geography,life science
Um a grade 11 learner doing maths,life science,geography . What causes do my subjects fit
Thursday, January 14, 2016 by Ntando

science
A 10 ohms, 8 ohms, and 5 ohms resistor connected in series to a Volts source. Find the current in each resistor.
Thursday, January 14, 2016 by Anonymous

Science
Which piece of children's play ground equipment could be used to model and explain the movement of matter in the biosphere? Slide Merry-go-round Swing Seesaw
Thursday, January 14, 2016 by Abby

Science
State how matter moves through the biosphere. State how energy moves through the biosphere. Explain each statement using examples to illustrate your explanation.
Thursday, January 14, 2016 by Abby

Science
What does the term adaption mean? How does adaption explain the patterns of distribution of plant and animal species in the world?
Thursday, January 14, 2016 by Abby

Science
Which of the following can be expected to occur as climate change continues on Earth? Decreased meltimg of sea ice Decreased migration of pests and pathogens Increased freshwater water sources Increased coastal flooding Is it A?
Thursday, January 14, 2016 by Abby

Science
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 Variable...
Wednesday, January 13, 2016 by Diana

Science help....
What happens to the density of the air in the balloon as it is heated?
Wednesday, January 13, 2016 by Diana

science help
An astronomer sees two stars in the sky. Both stars are equally far from Earth, but the first star is brighter than the second star. Which of the following is a valid conclusion about the first star? It is larger than the second star. It is smaller than the second star. It is ...
Wednesday, January 13, 2016 by Oscar

science help
When nuclear fusion begins, what can be said about the internal processes within that star? Atoms in the star begin to split. Atoms in the star begin to combine. The star is turned into a nebula. The star is turned into a blue giant. is it b
Wednesday, January 13, 2016 by Oscar

science help
A student did an experiment with two identical plants, Plant 1 and Plant 2. About 10 mL fertilizer was added to Plant 1. About 200 mL of water was added to each plant every day. The height of the plants was recorded over a period of 5 weeks in the table shown below. Week ...
Wednesday, January 13, 2016 by Oscar

science help PLS
Scientists earlier believed that the lowest measurable temperature is the freezing point of ice. However, modern scientists believe that temperatures below the freezing point of ice can also exist. What best accounts for these different opinions? scientists propose ...
Wednesday, January 13, 2016 by Oscar

science help
Two scientists did the same experiment but arrived at different results. The scientists most likely did not have accurate data and information misunderstand each other's interpretations belong to different backgrounds did not have instruments to take accurate measurements ...
Wednesday, January 13, 2016 by Oscar

Life science,geography,business and maths literacy
Am in grade 10 and i dont know what to study for at vasity
Wednesday, January 13, 2016 by Nompumelelo baloyi

SCIENCEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
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. ...
Wednesday, January 13, 2016 by CUPCAKE HELP

Science
1. In the western U.S., ranchers aggressively killed wolves because they posed a threat to their cattle. As the wolf population declined, the deer population began increasing. As a result, the surrounding forest ecosystems experienced increasing damage. The large number of ...
Wednesday, January 13, 2016 by Skyler

Science
which of the following is an example of a cyclic behavior that is seasonal? a. running from predators b. searching for water c. hunting at night d. migrating for warmth** I think its d
Wednesday, January 13, 2016 by Alex

Science
can you help me in mater and energy
Wednesday, January 13, 2016 by Mariah

Geography,maths literecy,life-science,agriculture,LO,sepedi and english
Which career can suit me?
Wednesday, January 13, 2016 by Peter

Science
Suppose you have a 50.0g sample of ice at -30.0 C. How many joules of heat energy are needed to heat the ice to 0.0 C? How many joules of heat energy are needed to melt the ice? I do not know how to set either of these up.
Wednesday, January 13, 2016 by Mary

Science
How to balance reaction of solid calcium carbide (CaC2) with excess water to form acetylene gas (C2H2) and solid calcium hydroxide?
Wednesday, January 13, 2016 by Mary

Physical Science
What force is needed to give a 0.25-kg arrow an acceleration of 196 m/s2? A. 0.25 N B. 49 N C. 196 N D. 748 N ___________________________________ I said 49N because F = MxA. Am I correct?
Tuesday, January 12, 2016 by Vanessa B

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