Saturday
August 27, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

science
Ammonium nitrate breaks down into Dinitrogen monoxide and dihydrogen monoxide
Wednesday, February 24, 2016 by ashley

Science Please Help!
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. I've been trying to figure it out but I can't please help me!
Wednesday, February 24, 2016 by Lolzypops

Science
Which reaction is exothermic? A. Cellular respiration B. Photosynthesis C. Baking soda + vinegar D. Melting Ice***
Wednesday, February 24, 2016 by Ally

Science!
1) Which of the following is true about photosynthesis? A. it is an exothermic reaction B. it is an endothermic reaction C. It produces carbon dioxide D. it occurs in animals I think it's A.
Wednesday, February 24, 2016 by Anonymous

Science
a fireman 50 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of 30 degrees above the horizontal. If the speed of the stream is 40m/s , at what height will the stream of water strike the building?
Wednesday, February 24, 2016 by Anonymous

Science
About what percent of all of Earth's fresh water is found in ground water, streams, lakes, and rivers?
Wednesday, February 24, 2016 by Sue

maths and science
Three courses or study field you are interested in following after grade 12 and provide three reasons
Wednesday, February 24, 2016 by masechaba

science
Ann is driving down a street at 50 km/h. suddenly a child runs into the street. if it takes ann .75 seconds to react and apply the brakes. how many meters will ann have moved before she begins to slow down? If she slows down at a rate of 1.5m/s^2, how long will it take her to ...
Wednesday, February 24, 2016 by carrie

life science ,cat,maths lit and english
What can i become with maths lit ,cat,life science and geography
Wednesday, February 24, 2016 by Anonymous

Science
4.)When two or more atoms of the same of the same element are in a chemical bond, the substance is called a(n)________ A.)Compound B.)Molecule C.)Nucleus D.)Particle*** Am I'm correct? BUT My mom disagree's and says C?, isn't she wrong?
Wednesday, February 24, 2016 by #FreeGucci

Science
2.)Which of the following are pure substances? A.)Chocolate Milk B.)Orange Juice C.)Sea Water*** D.)Hydrogen Peroxide (H2O2) C?
Wednesday, February 24, 2016 by #FreeGucci

science
A cylinder contains a moles of hydrogen at 0 degree celsius and 76cmHg.calculate the amount of heat require to raise the temperature of hudrogen to 50 degree celcius.keeping the pressure constant and what is the volume of hydrogen when at 0 degree celsius.
Tuesday, February 23, 2016 by Aleshe sulihat

Science
Physics question -A driver of a car travelling at 72km/h, applying brakes and accelerates uniformly in opposite direction at the rate of 5m/s2. How long will the car take to come into rest ? How far will the car covered a distance after applying bra
Tuesday, February 23, 2016 by Akki

science help
A scientific question should be vague creative non-testable non-repeating
Tuesday, February 23, 2016 by Oscar

science help
A scientific question should be vague creative non-testable non-repeating is it b
Tuesday, February 23, 2016 by Oscar

science help
A scientist uses a computer model to understand a widely accepted theory about Earth's surface. The computer model would most likely help the scientist to... A. reduce the intensity of earthquakes B. discover new facts about the theory C. stop the creation of faults during...
Tuesday, February 23, 2016 by Oscar

science help
Four groups of students, in different parts of the world, are investigating the reason why the shape of the moon changes from time to time. If the results of their investigations are considered valid, they would most likely be A) complex B) identical C) non-testable D) ...
Tuesday, February 23, 2016 by Oscar

science help check
Which of these is an example of an experiment? plant growth is affected by temperature leaves may change color due to temperature add different quantities of water to three potted plants the plant which gets the most sunlight grows the fastest is it c
Tuesday, February 23, 2016 by Oscar

Science
Calculate the amount of heat required to completely convert 1kg of water at 0°C to the boiling point at 100°C?
Tuesday, February 23, 2016 by Joe

science help
A scientist plans to find out the percent of teenagers who like science. She interviews 500 teenagers leaving a science museum and finds that 450 of them like science. The scientist concludes that 90 percent of teenagers like science. Why is the scientist's conclusion most...
Tuesday, February 23, 2016 by Oscar

science help
Which of these questions can be answered through science? What is the best water sport? Why should we value honesty? Why does water change into steam? What is the most important thing in life? is it c
Tuesday, February 23, 2016 by Oscar

science
A cylinder contains a moles of hydrogen at 0 degree celsius and 76cmHg.calculate the amount of heat require to raise the temperature of hudrogen to 50 degree celcius.keeping the pressure constant and what is the volume of hydrogen when at 0 degree celsius.
Tuesday, February 23, 2016 by Aleshe sulihat

science
P +HNO3 gives HPO3 + NO Balance the chemical equation by oxidation no. method
Tuesday, February 23, 2016 by mohd atif

math literacy,life science ,history ,design
What career can I choose with these subjects
Tuesday, February 23, 2016 by tamera

life science
Biological term for: the presence of definite upper and lower surfaces in animals
Tuesday, February 23, 2016 by Anonymous

English
1. He is a social science teacher. 2. He is a SS teacher. 3. She is a home economics teacher. 4. She is a HE teacher. 5. She is a technical arts and homemaking teacher. 6. She is a TAH teacher. 7. She is a healthe education teacher. 8. She is a HE teacher. 9. He is a technical...
Tuesday, February 23, 2016 by rfvv

Science
A rope is used to host an object with a mass of 1,3 tons vertically through a distance of 100m. The mass of the rope is 2kg per metre. Determine: the work done.the average tension in the rope and the power used if it takes 2minutes to host the object.
Tuesday, February 23, 2016 by Minah

Science
Why is UTC used for astronomical calculations?
Tuesday, February 23, 2016 by Anonymous

science
what is the balanced product of Pb(NO3)2 + Li(SO4)?
Tuesday, February 23, 2016 by dali

science
What is the pH of a mixture of 5ml of 0.1mol/litre sodium acetate and 4ml of 0.1mol/litre acetic acid? pKa= 4.76.... What is the pH on adding 1ml of 0?1mol/litre HCl to the mixture abouc
Monday, February 22, 2016 by hmm

Science
Mohan travels at 20m/s from home and returns back at 25m/s.Find his average velocity for the entire journey?
Monday, February 22, 2016 by Shaan

Science
Why are there so many different species on earth today?
Monday, February 22, 2016 by Sue

English
Help, Please! I don't quite understand what is asking in this assignment (Essay) Task: Write an essay that compares Frankenstein and his creation to a modern zombie story with the focus on how a monster might be used as a metaphor for science or scientific advances and/or ...
Monday, February 22, 2016 by Sarah

Science
A 2 N and 6 N force pull on an object to the right and a 4 N force pulls to the left a o 5 kg object. what is the net force on the object?
Monday, February 22, 2016 by Anamaria

psych
What is the Importance of Research in Behavioral Science?
Monday, February 22, 2016 by sade

English
Help, Please! I don't quite understand what is asking in this assignment (Essay) Task: Write an essay that compares Frankenstein and his creation to a modern zombie story with the focus on how a monster might be used as a metaphor for science or scientific advances and/or ...
Monday, February 22, 2016 by Sarah

physical science
a crate of cooldrinks with a mass of 15kg over a smooth horizontal surface by exerting a force of 80N at 30° to the horizontal. Draw a diagram and aswers the following 1. Draw a force diagram showing and labelling all the forces acting on the crate. 2. Calculate the ...
Monday, February 22, 2016 by Thembelihle Shabangu

Earth Science
Why are there so many different species on Earth today?
Monday, February 22, 2016 by Mike

science
This type of auto-immune disease occurs when the immune system attacks the layer of insulation that surrounds the nerves and slows nerve impulses.
Monday, February 22, 2016 by kevon

science
a 2,8kg trolley is moving to the right with a speed of 0,45m.s^-1. A 1.9kg brick is dropped from rest and lands on the trolley. the trolley and bRick move together across the horizontal surface. Assume an isolated system. determine the change in momentum of the trolley
Monday, February 22, 2016 by Nomfundo

science
In the diagram above, the arrows represent momentum. A larger arrow indicates more momentum. Which of the following best describes how the balls will move after ball A collides with ball B? (1 point) 1. Ball A will bounce off of ball B and roll to the left, and ball B will ...
Monday, February 22, 2016 by help pls

science/bioligy
How would a scientist use DNA or protein sequences from three different organisms to construct a cladogram? need help!!! how do I do this??
Monday, February 22, 2016 by Anonymous

science/biology (cladogram)
How would a scientist use DNA or protein sequences from three different organisms to construct a cladogram? don't understand this how do I write this???? help!!!!
Monday, February 22, 2016 by e,mma

engineering science
A solid cylinder rolls from rest down an incline 6m high without slipping. calculate the linear velocity at the foot of the plane
Monday, February 22, 2016 by David

science
How can I prepare a acid with a specific concentration and volume. Example how can I prepare o.5M of HCl
Monday, February 22, 2016 by adams

6th Grade Science
In the ____ temperatures can increase up to 1,700˚C.
Monday, February 22, 2016 by Cupcake :D

accelerated science
what is the energy level of visible light, infrared, and radio waves in joules?
Monday, February 22, 2016 by Anonymous

science
Why is fresh water considered a limited resource?
Monday, February 22, 2016 by briana

Science
In pea plants, yellow seeds are dominant over green seeds. Round peas are dominant over wrinkled peas. Cross two pea plants that are heyerozygous for both traits.
Monday, February 22, 2016 by Anonymous

Science
A plane flies 118 km at 15 degrees south of east and then flies 118 km at 35 degrees west of north. Find the magnitude and direction of the total displacement of the plane?
Monday, February 22, 2016 by Edlyn

Physical science
a balloon has a volume of 0.5 L at 20 degrees celsius. what will the volume be if the balloon heated to 150 degrees celsius? assume constant pressure and mass. I got 0.7218 L.
Sunday, February 21, 2016 by Emily

SCIENCE PLZ HELP
when are tides in earths oceans the highest? during the moons waning gibbous phase during the moons waxing gibbous phase when the moon is at the right angle of the sun when the sun, Earth, and moon are in a line.
Sunday, February 21, 2016 by K.CUndercoverNeedsHelpAndAlsoHelpsPeople

science
which term describes the main process in the water cycle
Sunday, February 21, 2016 by ginger

science
why is water a limited rescource
Sunday, February 21, 2016 by ginger

science
when whould electric current flow through a conductor
Sunday, February 21, 2016 by Anonymous

Science
If a cell undergoes mitosis every six hours, how many cells will there be in all after seven days?
Sunday, February 21, 2016 by Anonymous

Science
Expression for bernaulli theorem
Sunday, February 21, 2016 by Rahul

science
Express the value of time in s.I units 2hours 35 seconds I tried multiplying but gave me wrong answers and objectives are 7200 3600 9300 2100
Sunday, February 21, 2016 by kelvin

Science
What impact does storage of elastic energy have on the efficiency of hopping?
Sunday, February 21, 2016 by Mel

Science
There is generally more life found in the sunlit part of the ocean closer to the continents than there is in the open sea farther from the continents. Therefore, the open sea is sometimes called the blue dessert. Why is this? Thanks.
Sunday, February 21, 2016 by Geek Girl

Science - Characteristics of the Ocean Floor
If you could drop Mt. Everest (height:8848m) to the bottom of an ocean trench, would its summit(top) reach the level of the ocean's abyssal plains? Why or why not? Thanks.
Saturday, February 20, 2016 by Geek Girl

Science - Ms. Sue plz
Would you expect to find plant like organisms below 1,000 meters in the ocean? Why or why not? Thanks.
Saturday, February 20, 2016 by Geek Girl

PHYSICAL SCIENCE
Imagine two billiard balls on a pool table. Ball A has a mass of 2 kilograms and ball B has a mass of 3 kilograms. The initial velocity of ball A is 9 meters per second to the right, and the initial velocity of the ball B is 6 meters per second to the left. The final velocity ...
Saturday, February 20, 2016 by JCAINE

Science
If you could drop Mt. Everest (height: 8848meters) to the bottom of an ocean trench, would its summit (top) reach the level of the ocean's abyssal plains? Please help me with this question. Thanks. :D
Saturday, February 20, 2016 by Geek Girl

Science
I need an example or suggestion for a Controlled Experiment for a science presentation
Saturday, February 20, 2016 by Anonymous

Science
Are plant like organisms below 1,000 meters in the ocean? Thanks.
Saturday, February 20, 2016 by Anonymous

Science
A stone wirelesd at the rope 30cm long makes 10 complete revolution in 25 second
Saturday, February 20, 2016 by Abba

computer science
Assume a computer has the capacity to hold up to 4 memory modules, with each module containing 512M bytes. How many total bits are needed in the memory address?
Saturday, February 20, 2016 by moy

science
950ml of a gas at pressure of 1.5atm is compressed to 473ml. what is the new pressure of the gas
Saturday, February 20, 2016 by ladonna

science
freezing point of pure solvent remains constant whereas the freezing point of a solution continues to decrease with time
Saturday, February 20, 2016 by areen

Science
Al+(Cr2O7)2- = Al3+ + Cr3+ [al3+]=0.01M [(cr2o7)2-]= 0.1M [cr3+]=0.001M find the E cell if we add Naoh to each electrode until al(oh)3 precipitates pH=8 KPT of al(oh)3=5 * 10 -33 Eal=-1.66 V Ecr=1.33V
Saturday, February 20, 2016 by Lorela

general science
A car mass 500 kg accelerates 1m/s sqare the force due to eng is 600N the average frictional force is
Saturday, February 20, 2016 by velocity and motion

Earth science
Why didn't the early geologic time scale include the number of years ago that events happened?
Friday, February 19, 2016 by Sue

Science
The half-life of randon-222 is 8 days. What was the original mass if 6 grams remains after 24 days?
Friday, February 19, 2016 by Sarah

Physical Science
Suppose the jumbo jet of mass 30000 kg flies against an air resistance of 82000 N while the thrust of all four engines is 100000 N. Find the acceleration
Friday, February 19, 2016 by Ehhhh

Science
Actively dividing cells can be found in? meristems. xylem tissue. epidermal tissue. center of stems. phloem tissue. help
Friday, February 19, 2016 by Anonymous

science
which kind of reproductive structure is not within the fungi? is it anthers
Friday, February 19, 2016 by Anonymous

geography,life science, business and maths lit
What career can I use as an option after my matric??????
Friday, February 19, 2016 by granny

Earth Science
why didn't the early geologic time scale include the number of years ago that events happened?
Friday, February 19, 2016 by Sue

science
why didn't the early geologic time scale include the number of years ago that events happened?
Friday, February 19, 2016 by Sue

science
Iron is produced in a single displacement reaction with iron II cyanide and tin. How many grams of iron are produced when you use 1.98 g of tin?
Friday, February 19, 2016 by Siri

Science
Why are sedimentary rocks more useful than metamorphic or igneous rocks in establishing the relative ages of rock?
Friday, February 19, 2016 by Sue

Math
A science class planted a tree in the school courtyard that was 6 inches tall. It is growing 4 inches each week. Write a function rule for the height, h, of the tree based on the weeks, w, since it was planted. h = 6w + 4. h = 4w + 6. (MY ANSWER) h = 4w. h = 4w – 6.
Friday, February 19, 2016 by LOVE

science
3 Nitroglycerine is used as an explosive. The equation for the explosion reaction is: 4C3H5(NO3)3 ( l ) 12CO2 ( g) 1 10H2O ( l ) 1 6N2 ( g) 1 O2 ( g) a How many moles does the equation show for: i nitroglycerine? ii gas molecules produced? b How many moles of gas molecules are...
Friday, February 19, 2016 by Maya

science
why echo is weaker than original sound
Friday, February 19, 2016 by ayesha

science
You burn 6 grams of carbon in plenty of air: C ( s) + O2 ( g) = CO2 ( g) a What volume of gas will form (at rtp)? b What volume of oxygen will be used up?
Friday, February 19, 2016 by Maya

science
Why it is important to know the history of science in 300 words?
Friday, February 19, 2016 by deepak

Science
Does anyone know the answer to this? 2.50mL Fe =? atoms Fe, Dfe =7.87 g/mL
Thursday, February 18, 2016 by Popla

science
why did a portion of the table top get cold when Natasha placed her cold drink on the table
Thursday, February 18, 2016 by kyle

science
a banana turning brown when exposed to the air is an example of what
Thursday, February 18, 2016 by kyle

science
an ice cube, a glass of cold water, and a swimming pool are each exposed to the same amount of sunlight on a hot day. after five minutes, the ice cube is melted and the cold drink is two degrees warmer, but the temperature of the swimming pool remains unchanged. what is the ...
Thursday, February 18, 2016 by kyle

science
a blank property of matter describes an ability to change into different substances
Thursday, February 18, 2016 by kyle

science
a bananan turning brown when exposed to the air is an example of
Thursday, February 18, 2016 by kyle

science
an ice cube a glass of cold water in a
Thursday, February 18, 2016 by kyle

science
a 54-gram sample of an unknown material has a volume equal to 20cm3 what is the identity of the substance
Thursday, February 18, 2016 by kyle

science
write aprogram and flowchart to read anumber from 1-12 and print the name of the month
Thursday, February 18, 2016 by write aprogram and flowchart to read anumber from 1-12 and print the name of the month

Science
Can someone please check my answers? I would greatly appreciate it. Thanks! 1. Which of the following inner planets has virtually no atmosphere? a. Mercury*** b. Venus c. Mars d. Earth 2. Which of the following statements about the inner planets is true? a. They all have rings...
Thursday, February 18, 2016 by Blair

Computer Science
Create a Raptor Flowchart that calculates the amount a person would earn over a period of time if his or her salary were five cents the first day, ten cents the second day, and so on doubling each day. Your program should: 1. Request the number of days. 2. Display a table ...
Thursday, February 18, 2016 by Allison

science
If a ball that is freely falling has attained a velocity of 19.6 m/s after two seconds, what is its velocity five seconds later?
Thursday, February 18, 2016 by Anonymous

maths and science
A farmer sells eggs in trays.Each tray contains 30 eggs.a shopkeeper sells these eggs in dozens.If a shopkeeper needs 8 dozens a week,how many trays of eggs should he buy from the farmer?
Thursday, February 18, 2016 by mosese

  1. Pages:
  2. <<Prev
  3. 8
  4. 9
  5. 10
  6. 11
  7. 12
  8. 13
  9. 14
  10. 15
  11. 16
  12. 17
  13. 18
  14. 19
  15. 20
  16. 21
  17. 22
  18. Next>>