Monday
December 5, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

science
After drugs were administered, the brain activity of each person was recorded. This statement should be classified as 1 the problem = the main issue or subject being investigated in the study 2 a method= a procedure , process, or approach used to investigate the problem 3 a ...
Sunday, June 5, 2016 by kizzi

science
Can someone please check my other answer from Saturday June 5 @ 10:29 please thank you ?!
Sunday, June 5, 2016 by kizzi

science
left-handed people demonstrated greater brain activity than right-handed people when under the influence of drugs. This statement should be classified as 1 the problem =the main issue or subject being investigated in the study 2 a method = a procedure, process, or approach ...
Sunday, June 5, 2016 by kizzi

science
3.5g of zinc react with excess dilute hydrochloric acid to produce hydrogen gas at STP,calculate mas of hydrogen gas produced
Sunday, June 5, 2016 by mbuyisela

Science
Please My Answer To My Question
Sunday, June 5, 2016 by Charity

Science
Using A Well Labelled Diagrams,briefly Describe How You Would Determine The Density Of An Irregular Objects
Sunday, June 5, 2016 by Charity

science
What is a balanced chemical equation for the combustion of cooper?
Sunday, June 5, 2016 by kuhle ngcezu

Science
If 100 bacteria get into our body and reproduce every 20 minutes how many will there be in 2 hours?
Sunday, June 5, 2016 by Sonu

science
why do primitive organism have lesser number cells as compared to more advance form?
Sunday, June 5, 2016 by Anonymous

Science
I've been asking questions and all you so called "helpers" (such as Reed, Writeacher, etc.) you are all being sarcastic. I have no interests to cheat, but you don't listen to my side notes. I am going to ask one more question, and again, be don't be ...
Saturday, June 4, 2016 by FYH

science
the brains of left handers may be more sensitive to drugs, says a Swiss researcher, that may be why more people are right handed. Peter Irwin of the chemical firm Sandoz limited, in Basel, gave 88 subjects 12 different drugs, the used electroencephalograms (EEG) to record ...
Saturday, June 4, 2016 by kizzi

science
could you use potassium nitrate to test for fluoride in mouth rinse? Is potassium nitrate a water soluble.?
Saturday, June 4, 2016 by Janet

science
Three equal-sized pans containing distilled (pure water),ocean water (3 percent salt),and water from the Great Salt Lake in Utah (about 20 percent salt)are placed in freezer. Which of the following would be the order in which these three liquids would freeze? 1 distilled water...
Saturday, June 4, 2016 by kizzi

science
which of the following would be a disadvantage of boiling food in salted water rather than using pure water? 1 A only 2 B only 3 C only 4 D only 5 A and D only B ONLY is the answer?!
Saturday, June 4, 2016 by kizzi

Science
A machine has velocity ratio of 5 and is 60% efficient. What effort would be needed to lift a load of 200N with tge aid of this machine?
Saturday, June 4, 2016 by Selasi

science
Find the angle of friction when rod starts sliding
Saturday, June 4, 2016 by anu

Science
The Haber-Bosch process, devised in the early 20th century, revolutionized global industry. It provides a way of “fixing” atmospheric nitrogen into ammonia, allowing for the production of fertilizers and the many nitrogen-based chemicals we use today. The reaction is...
Saturday, June 4, 2016 by John Lee

Science
Why are boats more efficient than airplanes? They use less fossil fuels to move
Saturday, June 4, 2016 by David

Earth Science
Why are boats more efficient than airplanes? They use less fossil fuels to move
Saturday, June 4, 2016 by mike

Political science
what does realism explain best and what does it miss? what does liberalism explain best and what does it miss? what does radicalism best explain and what does it miss? what does Constructivism best explain and what does it miss?
Saturday, June 4, 2016 by Kammy

science
A locomotive train is on its way from Chicago, IL to Madison, WI. The trip is said to last 3.15 hours. When the train arrives in Madison the conductor notices it actually took them 3.26 hours. The train company prides itself on always having its trains to the station within a ...
Saturday, June 4, 2016 by Janet

Science
1.Asolid sphere has amoment of inertia of 0.8kgm2&diameter 10cm rolls down along an inclined plane of length 80cm which is inclined at 37` to the horizontal .What is the transitional momentum of the sphere as it reaches to the foot of the inclined plane?
Friday, June 3, 2016 by Melkamu

advanced science
A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. What is the acceleration of the crate? (Hint: remember to find net force first) a=6.00 m/s2 a=28.1 m/s2 a=8.10 m/s2 a=6.0 m/s2
Friday, June 3, 2016 by Beth

advanced science
A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. What is the normal force? A. 480 N down B. 480 N up C. 2300 N down D. 2300 N up
Friday, June 3, 2016 by Beth

advanced science
A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1860 N to the right. The forces acting on the crate are __________________. A. balanced B. unbalanced
Friday, June 3, 2016 by Beth

science
a body of mass 2 kg is thrown vertically upward with kinetic energy 245 J. The acceleration due to gravity is 9.8m/s^2 the kinetic energy of the body will become half at a hieght of
Friday, June 3, 2016 by khovidh

science
Forces of 23 N and 41 N act at a point and are inclined at 90° to each other. Find, by drawing, the resultant force and its direction relative to the 41 N force.
Friday, June 3, 2016 by norest

Science
Explain how you would prepare 250cm^3 of 0.2 m NaOH.
Friday, June 3, 2016 by Blessings

Science
Arrangethe increasing of bp for given molecule and given reason h2o, h2s, h2se. H2te
Friday, June 3, 2016 by Sneha

English
Khianna is preparing an informational presentation for her science class. Her presentation discusses three different theories about what killed the dinosaurs 65 million years ago. The first theory is that an asteriod hit the earth, the second theory is climate change, and the ...
Friday, June 3, 2016 by Bob

Science
4MV=4×?V
Friday, June 3, 2016 by Zeenat

English
Dear Ms.Sue, thank you so much for your help. Please help me with a few more problems. 1) "the thesis defines the integrity and continuity of the process of the emergence of natural science" (maybe too many OF?) 2) "its nature is displayed in the(?) influence on...
Thursday, June 2, 2016 by Ilma

Science
A force of 32.3 N is applied to a 5.87 N box resting on a table. If friction acts with a force of 2.11 N, what is the acceleration of the box?
Thursday, June 2, 2016 by Morgan

Science, please help ASAP!!!
help me fill me fill in the blanks please??? My options:adaptation, body, homologous structures, inheritance, older, artificial selection, overproduction, punctuated equilibrium, common ancestor 1) Similarities in the early development of chickens and opossums suggest that ...
Thursday, June 2, 2016 by Universal Almighty

science
Why do human beings use running shoes,winter boots, skis, or flippers? Why are these not biological adaptations?
Thursday, June 2, 2016 by Delaney

Science
The electric field due to a charged conducting sphere of radius 10 cm , at a distance of 20 cm from the centre of the sphere is 1.5*10pow3 NC-1 and points radially inwards.what is the charge on the sphere ?
Thursday, June 2, 2016 by Himanshu

Science - Chemistry
How many atoms in a diamond.
Wednesday, June 1, 2016 by Ebony

science
How can I find the number of mole of 0.25g of CuSO4?
Wednesday, June 1, 2016 by culleyn

science
When a particle starts from rests and moves with constant acceleration then why its path is always a straight line?
Wednesday, June 1, 2016 by priya

Physical Science
Diamond is a covalently bonded substance made of pure carbon. Each carbon atom has six total electrons so this means carbon shares ________ electron(s) with other carbon atoms. A) one B) two C) four D) six Help Please!
Wednesday, June 1, 2016 by Ben Dover

math
Naron is learning for pre-second semester examination. He divides 8 hours per day for learning science, mathematics and literature with the ratio of 2 : 3 : 1. Find the number of hours he studies each major.
Wednesday, June 1, 2016 by dara

Science
A body is moving with an initial velocity of 36km/hr accelerates uniformly at the rate of 4m/s for 15s. Calculate the total distance travelled in 20s and the final velocity?
Tuesday, May 31, 2016 by Kimi

Maths,Science,geography
Distinguish between folding and faulting
Tuesday, May 31, 2016 by Athini

science
explain why the surface tension of water is greater than that of methylated spirit
Tuesday, May 31, 2016 by tshegofatso

Math and science
How far apart are these two buildings?
Monday, May 30, 2016 by Lebo

science
If all the nematocysts on a mature man-of-war were filled with poison, what is the total amount of poison (in milligrams) that they would contain? 1. less than one milligram 2. two milligrams 3. five milligrams 4. six milligrams 5. more than eight milligrams I believe the ...
Monday, May 30, 2016 by miss

math, science etc
T=(pq/r)-rq make q subject of formula
Monday, May 30, 2016 by muhammed Darboe

SCIENCE PLZZ HELP!!!
____ is rate of change of position. Speed Velocity Acceleration Displacement 2. Which of the following is the difference between speed and velocity? direction units speed none of the above 3. A planet is discovered that is the same size as Earth and has the same gravitational...
Sunday, May 29, 2016 by gabby

Basic math for science
A sportswear manufacture determines that the marginal cost of producing x worm-up suits is given in dollars by 20-0.015x.if the cost of producing one suits is $25,find the cost function and the cost of producing 50 suits and 100 suits
Sunday, May 29, 2016 by Rose

help science
3 simple steps for DNA duplication I have found so many answers but cant get a concise one. 1. separation - of 2 dna strands unzips ? 2. duplicates ? 3. zips back up ? and then a simple sentence about each
Sunday, May 29, 2016 by danny

Science
A man has a weight of 120kg what will be the Weight of same man on the moon
Sunday, May 29, 2016 by Anonymous

science
Calculate the osmotic pressure 5% glucose Sol. At 298 kelvin?
Sunday, May 29, 2016 by Rinku

science
Which of the following substances would be most effective in relieving the pain caused by a man-of-war sting to one's skin? 1. tap water 2. club soda 3. lipstick 4. perfume 5. lemon juice help this is a hard one
Sunday, May 29, 2016 by miss

7th grade science final
review Question -- 3 simple steps for DNA duplication I have found so many answers but cant get a concise one. 1. separation - of 2 dna strands unzips 2. duplicates 3. zips back up and then a simple sentence about each
Sunday, May 29, 2016 by Danny

science
What can be concluded if the family finds out the lights in the bathroom work, but the floor lamp and tv set still do not work? 1. The electrical service to the cabin has not gone off. 2. The bathroom lights are on the same circuit as the floor lamp and tv set. 3. The floor ...
Saturday, May 28, 2016 by miss

science
Which of the following statement best describes the two different types of electrical energy involved in the situation above? 1.Both the lightning and the electricity used to light the floor lamp are forms of static electricity. 2. Both the lightning and the electricity used ...
Saturday, May 28, 2016 by miss

science
Which of the comments are examples of hypothesis suggested to explain what caused the lights to go out? 1. A and D only 2. B and C only 3. C and E only 4. D and E only 5. A, C and E only my best answer is 2
Saturday, May 28, 2016 by miss

SCIENCE
Which of the following is equal to the buoyant force of a rock placed in a beaker of water? (1 point) volume of the displaced fluid weight of the displaced fluid volume of the rock weight of the rock
Saturday, May 28, 2016 by gabby

SCIENCE HELP
CAN SOMEONE CHECK THESE!! 1. Which of the following is a reason why a person might want to wear snowshoes if walking a distance in deep snow? (1 point) snowshoes spread the person’s weight out snowshoes reduce the amount of pressure on a given spot snowshoes keep the ...
Saturday, May 28, 2016 by gabby

science
A family is seated around the fireplace in a mountain cabin on a rainy night. A bright flash of lightning lights up the room and is followed in less than a second by a loud clap of thunder. The light bulb in a floor lamp flickers and goes out, as does the TV SET. Fortunately, ...
Saturday, May 28, 2016 by miss

SCIENCE PLZZ HELP!!!
Given equal concentrations, which of the following produces the fewest hydronium ions in an aqueous solution? strong acid weak acid strong base weak base This is the only question i need help on and i have no clue what ut is! any help?
Saturday, May 28, 2016 by gabby

science
If removed from the life cycle, which of the following would have the greatest impact on the productivity of lawns? 1. robins 2. moles 3. toadstools 4. dandelions 5. microorganisms need a little help here?! I think my answer would be 5
Saturday, May 28, 2016 by miss

science
Birds extract more food from a lawn than from an equivalent amount of prairie because 1. lawns contain more moisture than prairies 2. prairies occur at a higher elevation than lawns 3. lawns contain more food than prairies 4. temperatures are higher on lawns than on prairies 5...
Saturday, May 28, 2016 by miss

science
The major advantage provided by worms to a lawn is? 1. attracting birds 2. protecting moles 3. breaking rocks 4. eating weeds 5. cultivating soil I believe my answer is #5 ?!?!
Saturday, May 28, 2016 by miss

physical science
Name the intermolecular forces in each of the above mentioned substance and water
Saturday, May 28, 2016 by lesego mosweu

physical science
Explain why the surface tension of water is greater than that of methylated spirit?
Saturday, May 28, 2016 by lesego mosweu

science
What is the equivalent resistance when resistance of 1ohm and 10raise to 6 ohm are connected in series
Saturday, May 28, 2016 by advaitha sajjevan k

Social science
India: ______decimal _____ :architecture
Saturday, May 28, 2016 by Aman singh

science
Chromium (III) iodate has a Ksp at 25°C of 5.0 x 10–6. 125 mL of a solution contains 0.0050 mol L–1 Cr (III) ion. Possible answers: a. 8.4 x 10–2 mol L–1 b. 2.2 x 10–3 mol L–1 c. 6.3 x 10–2 mol L–1 d. 2.1 x 10–2 mol L–1 ...
Friday, May 27, 2016 by jess

SCIENCE HELP PLS
How does using coal to generate electricity affect the environment? (1 point) Using more coal reduces the amount of pollution from using oil. Using coal improves the quality of nearby water. Using coal, instead of wood from trees, helps improve the environment. Using coal ...
Friday, May 27, 2016 by Annaleigh

Science HELP Please
The following facts are true about Resource A: It grows in nature and takes about five years to reach a mature size. It can be replanted after it is cut down. Resource A is most likely a(n) A inexhaustible resource. B nonrenewable resource. C recycled material. D renewable ...
Friday, May 27, 2016 by Annaleigh

U.S. History
1. What would this image convey to someone from the early-1900s about about the suffrage movement? (image: "early-1900s women's suffrage painting"-- this has a sign on it that says "official program women's suffrage procession" a person riding a ...
Friday, May 27, 2016 by d

science
A bicycle tire is filled with air pressure of 6 atm at a temperature 20 Degrees Celsius. Riding the bicycle on asphalt on a hot day at a temperature 42 degrees Celsius makes the volume of the tire increase by 2%. What is the new pressure in the bicycle tire?
Friday, May 27, 2016 by amber

science
Does sodium nitrate turn the phenolphthalein indicator pink ?
Thursday, May 26, 2016 by Deepak

Please check my answers for science!
What does a cladogram show? A)comparison of the relative ages of organisms B)evolutionary relationships between organisms C)comparison of species that are most similar D)ecological relationships between organisms*** Which pair below has the most shared derived characteristics...
Thursday, May 26, 2016 by Universal Almighty

Maths,Physics,Life Science, Agricultural science
list three factors to consider when choosing subject in grade 10
Thursday, May 26, 2016 by sibongile

science
imagine you have two identical globes.what type of connection would cause the total amount of light and heat emitted to,, a.less than the amount emitted by a single globe? b.more than the amount emitted by a single globe?
Thursday, May 26, 2016 by kgomotso

Science
What would the mass of five grams of salt mixed with twenty grams of water be?
Wednesday, May 25, 2016 by Kenzie

earth science
state the mostly reason for the differences in the weathering rate of the three rock materials
Wednesday, May 25, 2016 by Celest

algebra
A survey of 70 Customers was taken at a bookstore regarding the types of books purchased. The survey found that 42 customers purchased mysteries, 34 purchased science fiction, 24 purchased romance novels, 18 purchased mysteries and science fiction, 12 purchased mysteries and ...
Wednesday, May 25, 2016 by angie

science
If a steel-density is 7.8g\cm is put in water, will it float or sink
Wednesday, May 25, 2016 by Ayanda Mayisela

Physical Science
How much heat is necessary to change 305g of ice at -11c to water at 20c
Wednesday, May 25, 2016 by Marie

science
If element X has 85 protons, how many electrons does it have? electrons
Wednesday, May 25, 2016 by Anonymous

science
How many grams of zinc chloride are required to react with 15 grams of aluminum metal to create aluminum chloride and zinc metal?
Wednesday, May 25, 2016 by Strawberry

science
if one person is pushing an object to the right and another person is pushing an object to the right like so: 10 Newtons →(object)← 15 Newtons What is the net force? Are the forces unbalanced or balanced? I think the forces are balanced but I'm not sure what ...
Tuesday, May 24, 2016 by Truce

science
A ray of light travels from Liquid helium (n=1.03) into a second material. You gradually increase the angle of incidence until, at 83.6°, the light no longer passes into the second material. What is the index of refraction of the second material?
Tuesday, May 24, 2016 by Anonymous

science
Gallium crystallizes in a simple cubic lattice. Sketch the unit cell. Determine the number of atoms present in the unit cell. The density of gallium is 5.904g/cm^3. Determine a value for the atomic (metallic) radius of gallium.
Tuesday, May 24, 2016 by Mustapha

earth science
When I bumped the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction. 1st 2nd 3rd
Tuesday, May 24, 2016 by r

science
a radioisotope, Iodine-131, has a half life of 8.1 days. explain what this means. draw a particle diagram for a sample 12 particles of I-131 initially after 8.1 days and after16.2 days.
Tuesday, May 24, 2016 by mason

science
calculate delta E & delta H when 100dm^2 of helium at S.T.P are heated to 373k in a closed container. assuming that the gas behaves ideally and CV=12.55g/mol
Tuesday, May 24, 2016 by Ty

Science
escribe why there are different layers in the atmosphere what are the charecterestics of them which one has the ozone layer which layer is the coldest which is the hottest which one holds the aurora borealis
Tuesday, May 24, 2016 by Help me

Science
A man walked 2.5 km in 50 seconds how fast did he go in meters per second?
Monday, May 23, 2016 by Jared

Science - 6th grade
A skydiver prepares to jump out of a plane. Explain how gravity and air resistance will affect the motion of the skydiver before and after he or she opens the parachute. My response : Gravity will pull the skydiver down to the ground. As they're in the air and go ...
Monday, May 23, 2016 by Carina

science
calcium reacts with water to form calcium hydroxide and hydrogen.how many moles of water are required to react with 0.5 mole of calcium?
Monday, May 23, 2016 by laona

science
Write about different types of plants?
Monday, May 23, 2016 by mayank

Science
Solubility of nacl in 100g of water at80degree
Sunday, May 22, 2016 by Vishali

science
Assume that some sugar was put into some rice by mistake. Design an experiment to separate the mixture. I'm not sure what I should do, can someone help me out?
Sunday, May 22, 2016 by truce

Science (Biology)
Use your knowledge of photosynthesis to explain what is happening in the following graphs. 67(dot)media(dot)tumblr(dot)com /d99a0dd856c87dfc21b9314f89019994/tumblr​_o7ltp1unLS1tt1il6o1_1280.jpg
Sunday, May 22, 2016 by Michlle

science
14. A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the radius of the curve?
Sunday, May 22, 2016 by Anonymous

science
Calculate the equilibrium constant of NH4HS H2S + NH3
Sunday, May 22, 2016 by andile

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