Saturday
July 23, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

science
a man has a mass of 80,0 kg is standing on the surface of the earth. a )calculate the magnitude of the attractive force (gravity) that the earth exerts on the man.(784n) b)how does your answer in a) compare to the magnitude of the force that the man exerts on earth? c)use your...
Sunday, February 28, 2016 by mamare

Computer Science/Pseudo Code Python
Hi, I'm confused about an assignment. I'm not sure what to do and would like some help. An example: Write a program that obtains two integer numbers from the user. It will print out the sum of those numbers. Pseudo code: Prompt user to enter first integer number ...
Sunday, February 28, 2016 by Rain

Science
What is g efeective?elustrate an example.
Sunday, February 28, 2016 by Anand shubham

Science
1. How does nanotechnology how engineers make products for the future? A. By changing a materials atomic structure, it can be made from elements that are easier to obtain. B. By changing a materials atomic structure, it's physical properties can also be changed. C. By ...
Saturday, February 27, 2016 by Rhyleigh

Science - Ms. Sue plz
Which structures on the ocean floor are equivalent to mountains on land? Thanks.
Saturday, February 27, 2016 by Geek Girl

SCIENCE
a body at rest is given an innital uniform acceleration of 8.0m/s-2 for 30s,acceleration reduce to 5.0m/s-2 for d next twenty sec.body mentains speed ten for 60s after brought to rest in 20s draw in graph 1.using d graph to calculate 2.maximum speed attain in motion 3.total ...
Saturday, February 27, 2016 by TIMILEHIN

science
How can i prepare a 100ml, 0.1M phosphate buffer solution (pH = 7) out of Na2HPO4 and NaH2PO4
Saturday, February 27, 2016 by mel

Science
How many grams of sodium hydroxide are needed to react with 50 grams of phosphoric acid?
Saturday, February 27, 2016 by Kyle Brovlofski

Chemistry
I have to summarize 10 articles relating to the topics we had covered in class. However, there are 3 sources out of the 10 that I don't understand. Could someone possibly go through the sources and summarize them. 1.) This article covers Nuclear Chemistry (Nuclear Reactors...
Saturday, February 27, 2016 by Jess

Science HELP PLS
how are earth and venus similar? how is venus different from earth? provide two similarities and two differences
Friday, February 26, 2016 by Zach

science
An electric lamp rated at 48w,12-v supply. Calculate the current flowing in the lamp and the resistance
Friday, February 26, 2016 by wisdom Andrew

Science( please help)
  In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the  A. cathode. B. deflecting plate. C. anode. D. grid. ? The part of the atom that accounts for electricity is the  A. nucleus. B. electron. C.&...
Friday, February 26, 2016 by Brooklyn

science
a bike weighs 200 n. if it starts from rest and travels 100 m in 5 s undergoing constant acceleration, what net force is causing the acceleration
Friday, February 26, 2016 by David

Science
Jawless fishes and salamanders are alike in that both types of animals A. are amphibians B. have backbones C. have fins D. are smooth skinned organisms B or D
Thursday, February 25, 2016 by Anonymous

Science
Physical properties of silver carbonate.
Thursday, February 25, 2016 by Tom Murtha

Math
Wanda wants to have a test average of 90 her four science tests. On the first three tests, she got scores of 84, 96, and 85. What does she need on her last test to reach her goal?
Thursday, February 25, 2016 by Sidney

science help
Which of the following is typically associated with a reduction in photosynthesizing plants in a water supply? An increase in dissolved oxygen A decrease in dissolved oxygen An increase in phosphates A decrease in phosphates is it d
Thursday, February 25, 2016 by Oscar

science help PLS
Which of the following is the most likely way for bacteria and viruses to enter a water supply? Increased photosynthesis releases bacteria and viruses Poor sanitation habits cause water to mix with sewage Water from a burst dam sweeps particulate matter into a nearby river ...
Thursday, February 25, 2016 by anonymous

science
show that the moment of inertia of a solid cylinder with radius R, mass M, and length L is 1/2(MR^2)
Thursday, February 25, 2016 by Jason Young

Science
A microwave oven supplies 1.000kj per second.how many min should be set on the microwave in order to heat 250.g of water from 24.3 degrees c to its boiling point?
Thursday, February 25, 2016 by Lucas

science
show that the moment of inertia of a uniform rod of length L and mass M about an axis perpendicular to the rod and passing through its center of mass is 1/12(ML^2)
Thursday, February 25, 2016 by Jason Young

Science
Which of the following would likely be part of an ionic bond? Choose all that apply (2 points) A. K+1 B. Cl2 C. F-1 D. Ne
Thursday, February 25, 2016 by Anonymous

Science
How many valence electrons does an atom of rubidium have?
Thursday, February 25, 2016 by Anonymous

science
Two forces whose resultants is 100N are perpendicular to each other. If one of them makes an angle of 60 degree with the horinzontal. Calculate its magnitude
Thursday, February 25, 2016 by olayiwola

Science
What is the reproduction rate of the bacteria species Vibrio Cholerae?
Thursday, February 25, 2016 by Anonymous_01

Science
Johnny left a glass of milk on his bedside table for week, and it spoiled. At the end of the weel, the glass contained a yellow liquid with lumpy white chunks, and there was a terrible odor. What can be concluded? A. The milk has undergone a physical change B. The mass of the ...
Thursday, February 25, 2016 by Anonymous

Science Please help me ASAP!!!!!!
A student mixed two clear liquids together in a beaker. A gas and a new liquid formed. The gas escaped, so the student was unable to measure it's mass. She guessed that it's mass was no more than 10.0 [LW1] grams. Her data is shown in the table below. Liquid react A= ...
Thursday, February 25, 2016 by Ally

life science,mathematics,agricultural,tourism
which study fields I should take?
Thursday, February 25, 2016 by lovely

history,geography,life science,maths literacy
provide three possible financial sources for assistance that you can access for funding your studies and indicate the financial obligations you will have if you choose each of these options
Thursday, February 25, 2016 by mzuphelele zikizela

history,geography,life science,maths literacy
what are the admission repuirement for traffic?
Thursday, February 25, 2016 by mzuphelele zikizela

history,geography,life science,maths literacy
what is the description of the traffic
Thursday, February 25, 2016 by mzuphelele zikizela

history,geography,life science,maths literacy
provide two reasons why you find this a suitable course for each choice
Thursday, February 25, 2016 by mzuphelele zikizela

science
how can I prepare 5 micromolar solution of Fe(NO3)3.9H2O? plz guide me as soon as possible
Thursday, February 25, 2016 by Soumya

science
A piece of metal has a mass of 120 grams.if its volume is 8 cm3.what is its density?
Thursday, February 25, 2016 by maxine

Science
a ball is rolled off the edge of a dining table 1.5 m high with a horizontal velocity of 2.2 m/s with what velocity does it strike the ground? How far from the edge of the table did it land on the floor?
Thursday, February 25, 2016 by Kyla

Science
The height of the tropopause increases near the equator. What does this say about the thickness of the atmosphere?
Thursday, February 25, 2016 by Anonymous

Science
The ratio of Secondary Turns to Primary In a Transformer is 3 if the EMF In the Secondary Coil Is 600Volts Find The EMF Of Primary
Thursday, February 25, 2016 by Basha

science
how does high speed space travel affect time?
Wednesday, February 24, 2016 by nani

science
what is the scientific name of the big dipper?
Wednesday, February 24, 2016 by nani

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

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