Wednesday
December 7, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science
A solution contains 60g of sugar in 480g of water calculate the concentration of solution in terms of mass by mass percentage of the solution
Thursday, April 28, 2016 by Subhitcha

Science
Name two types of evidence used to support the theory of evolution explain how scientists use each type of evidence to provide support for evolution. give one example of each
Thursday, April 28, 2016 by Plz help

Science
Name two types of evidence used to support the theory if evolution. Explain how scientist use each type of evidence to provide support for evolution. Give one example of each
Thursday, April 28, 2016 by Plz help

Science
The compound which will form the strongest dipole between CCl4;CO2;BF3;HCL;PF3
Thursday, April 28, 2016 by Metse

Army school science
What is intial velocity?
Thursday, April 28, 2016 by Shivoy

science
which of the following does not change when a car keeps a constant speed but changes direction
Thursday, April 28, 2016 by Grace

Science
In a series circuit if the circuit resistance is 560ohms and the inductive reactance is 1200ohms, what would be the voltage drop across the inductor
Wednesday, April 27, 2016 by Bob

SCIENCE
Which of the following gases occupy the smallest volume at STP? a 4.032 g H2 b 1.000 mol of carbon dioxide c 6.022 × 1023 molecules of O2 d 35.45 g Cl2
Wednesday, April 27, 2016 by MELANIE

Probability
Mr.Roy needs two students to help him with a science demonstration for his class of 18 girls and 12 boys. He randomly chooses one student who comes to the front of the room. He then chooses a second student from those still seated. What is the probability that both students ...
Wednesday, April 27, 2016 by Mi

Re-post - Science - from Spitfireredhead
Posted by SpitFireRedHead on Wednesday, April 27, 2016 at 8:23am. Please check this. Thanks! 1. Which of the following shows fossils as evidence of continental drift? a. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in ...
Wednesday, April 27, 2016 by Writeacher

science
how would you produce a pure sample of hexane
Wednesday, April 27, 2016 by Denanda

Science
Im sorry i am totally stumped What is the main difference between mechanical and electromagnetic waves A. Mechanical waves involve the transfer of energy; electromagnetic waves do not B. Mechanical waves require a medium to travel in; electromagnetic waves do not C. Mechanical...
Wednesday, April 27, 2016 by help me

physics
home / study / science / physics / questions and answers / a 10kg block slides towards the 3kg moving block ... Your question has been answered! Rate it below. Let us know if you got a helpful answer. Question A 10kg block slides towards the 3kg moving block to create a ...
Wednesday, April 27, 2016 by anna

physics
home / study / science / physics / questions and answers / a block of mass 3kg s sliding along the frictionless ... Question A block of mass 3kg s sliding along the frictionless horizontal surface with a speed of 2m/s. 1. What is the kinetic energy of the block? 2. A wedge is ...
Wednesday, April 27, 2016 by anna

Science
Which of the following statements is true about Earth's magnetic poles? A.They are located at earths geographic poles B.They are the areas where Earths magnetic field is weakest. C. They are the areas where Earths magneic field is strongest. D. Earth has one dominant ...
Wednesday, April 27, 2016 by Sara

science
which of the following cellular organelles is responsible for realising the energy contained in food
Wednesday, April 27, 2016 by Dana

Science "HELP"!
1.)A vacuum flask keeps its contents warmer or cooler than the surrounding environment for a length of time. It consists of two flasks, one inside the other, that connect at the neck. The space between the two flasks is COMPLETELY empty of air. A)- One flask is smaller than ...
Wednesday, April 27, 2016 by #FreeGucci

Science (please check Ms. Sue)
Please check this. Thanks! 1. Which of the following shows fossils as evidence of continental drift? a. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in Scotland’s highlands. b. Mesosaursus, an ancient reptile, had ...
Wednesday, April 27, 2016 by SpitFireRedHead

science
The angle between incident ray and the mirror is 30° a. What is the angle of incidence b. What is the angle of reflection?
Wednesday, April 27, 2016 by muxibo

science
What is the Biosphere ?
Wednesday, April 27, 2016 by muxibo

science
Give five application of Doppler Effect in science
Wednesday, April 27, 2016 by ORIFHA

SCIENCE PLZ HELP YES OR NO ANSWER
DOES THE GALAXY ANDROMEDA HAVE A SUN? I THINK IT DOESN'T BUT IM NOT SURE PLZ HELP THX! ~Sparkles_01
Wednesday, April 27, 2016 by Sparkles_01

Science
if you had a real thermometer that was accurate how could you modify your experimental thermometer to read actual temperatures
Tuesday, April 26, 2016 by #FreeGucci

Science
2.)you had a real thermometer that was accurate, how could you modify your experimental thermometer to read actual temperatures?
Tuesday, April 26, 2016 by #FreeGucci

science
how can I discuss how Mendeleev's periodic table relates with the modern one
Tuesday, April 26, 2016 by varaidzo

Science
how does changing temperature affect inland and coastal areas? Please give me a brief explanation.
Tuesday, April 26, 2016 by saliha

science
Calculate the emf of the cell CR|Cr3+(0.1M)||Fe2+(0.1M)Fe Given, E°Cr3+|CR = -0.75v E°Fe2+|Fe = -0.45v Cell reactn 2Cr(s)+3Fe2+(aq) -> 2Cr3+(aq)+3Fe(s)
Tuesday, April 26, 2016 by Rasilu

science
Calculate the EMF of the cell CR|Cr3+(0.1M)||Fe2+(0.1M)|Fe Cell reaction- 2Cr(s)+3Fe2+(aq)->2Cr3+(aq)+3Fe(s)
Tuesday, April 26, 2016 by Rasilu

Science
An organisms particular role in its habitat is or when and how it survives is called its what? A.carrying capacity
Tuesday, April 26, 2016 by Senpai were all gunna die

Science help ASAP
1. Carrying capacity is the maximum number of ____ that an ecosystem can support. A. Different species B. Individuals in a population C. Habitats D. Limiting factors
Tuesday, April 26, 2016 by Dylan

science (URGENT!! CORRECT PLEASE))
(1) The inputs for cellular respiration are: A) Nutrients and carbon dioxide B) Energy and carbon dioxide C) Nutrients and oxygen D) Energy and oxygen ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ My Answer: B ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (2) The outputs for cellular respiration are A) ...
Tuesday, April 26, 2016 by Yuno Gasai

Computer science
I want to make my traffic lights run automatically without any user input. I have created this code so far but the images don't show up please help. My code: <!DOCTYPE html> <html> <head> <script type="text/javascript"> var lights=["...
Tuesday, April 26, 2016 by L

SCIENCE
I mix 300.0ml of the barium nitrate solution from 1c with 100ml of a 1.50M lithium phosphate solution. The reaction produces solid barium phosphate a. Write a balanced equation for the reaction. b. Which is my limiting reagent? c. How much barium phosphate may be produced in ...
Tuesday, April 26, 2016 by AKASH

computer science
Internet Service Provider An Internet service provider has three different subscription packages for its customers: Package A: For $9.95 per month 10 hours of access are provided. Additional hours are $2.00 per hour. Package B: For $13.95 per month 20 hours of access are ...
Tuesday, April 26, 2016 by ignatius

Science
100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. Ans is 0.227M
Tuesday, April 26, 2016 by Anonymous

Science
25 g of Iron (II) Oxide reacts with 25 g of Chloric acid to produce Iron (II) chlorate and water. a. Determine the limiting reactant b. Determine the excess reactant c. Determine the theoretical yield of water d. Determine how much excess reactant is left e. Determine the ...
Tuesday, April 26, 2016 by Jaime

Science
18 g of hydrochloric acid reacts with 15 g of calcium hydroxide produce calcium chloride and water.
Tuesday, April 26, 2016 by Jaime

Science
A sphere of mass 30.0 kg and radius 0.150 m is attached to a point on a smooth vertical wall by a string of length 0.150 m which runs from a point on the surface of the sphere to the point on the wall. Find the tension in the string and the horizontal force applied to the ...
Monday, April 25, 2016 by Krishna

Science
I need help on an I am poem for sodium can you help me ? Thank you for you time :)
Monday, April 25, 2016 by Breanna

science
The engine of 300kg dragster exerts an average of forward of 53000N over the first 20m of it's race.the dragster takes 0,8 sec to cover the first 20m calculate the work done by the engine
Monday, April 25, 2016 by philani

science
when solid aluminum is heated with chromium(II) oxide, solid chromium and aluminum oxide are produced. If you are using 125 g of aluminum and 225 g of chromium (II) oxide, how many grams of chromium are produced. If you actually collect 110g of chromium wht is the percent yield?
Monday, April 25, 2016 by Cheyenne

Science
A jar contains 100 mL or a 4.0 M silver nitrate solution. What mass of solid copper would you add to bring all the silver out of the solutions as a solid?
Monday, April 25, 2016 by Cheyenne

life science
Define the 2 concepts: fraud and corruption and and give examples of each
Monday, April 25, 2016 by PHATHUTSHEDZO

Science
Two charges +1C and -1C are placed at distance 1m apart ,each having masses 2kg respectively are released.what is the type of collision they experience?
Monday, April 25, 2016 by Anonymous

Physical science
The bullet strikes a stationary of 5kg wooden block fixed to a flat,horizontal table.the bulletis brought to the rest after travelling a distance of 0,4m into the block.calculate the magnitude of the average force exerted by the block on the bullet
Monday, April 25, 2016 by Kabelo

science
How many hydrogen atoms are present in 32 grams of methane?
Monday, April 25, 2016 by baba

Science
1. Which of the following could be an engineering project that could better protect the planet? -finding a new landfill site -designing a better trash compacter -deciding which product can be recycled*** -growing microbes that eat oil 2. Engineers who are working to find ...
Monday, April 25, 2016 by Julia

science
explain why the surface tension of water is greater than that of methylated spirit?
Monday, April 25, 2016 by Reitumetse

Science
In which statement is the tanning me supporting facts and examples being used . A( … It was countries and then individual cities that had collections of exotic animals for people to come and see and they were no longer reserved for the wealthy rulers B( The zoo should be...
Monday, April 25, 2016 by jjiiddss

Science
Which one of following could be the molecular formula of vitamin A? Options C20H30O , C12H18N4Cl2OS, C17H20N4O6, C9H17O5N.
Monday, April 25, 2016 by Nivedita

science 6th grade
1.the nose diaphragm and lungs are part of the_________system circulatory excretory nervous respiratory(my answer)
Monday, April 25, 2016 by anna

Science
What is the velocity of a block of wood 3.0 cm on each side that has a mass of 27g? Will it float on water?
Monday, April 25, 2016 by Guillermo

math
Julian spent 45 minutes doing his math homework. He spent 35 minutes doing his science homework. Afterward, he did his reading homework. He ended up studying for 2 hours and 15 minutes altogether. How long did it take him to do his reading homework?
Monday, April 25, 2016 by renita

Science
what is the nature of mixture when 10gram ice is mixed at -20degree centigrade us mixed with 50gram at 120 degree centigrade?
Monday, April 25, 2016 by Dipak

Science
A man has a mass of 70 kg on earth .Calculate its mass and weight on moon
Monday, April 25, 2016 by Avdesh

Science - Chemistry
Calculate the amount of energy a woman takes in during a year on a 2200kcal a day diet (1 calorie = 4.18J). Calculate the amount of energy she spends in driving 5000 miles a year at 40 miles to the gallon of octane, given 1 gallon of octane weighs 3.12 kg, and standard ...
Monday, April 25, 2016 by Willie ISSAC

Science- Density
I'm having difficulty understanding density. I am trying to relate the concept of density to brownies. Should a brownie with baking soda have a higher or lower density compared to a brownie with no baking soda? Does a thick brownie mean a high or low density? When it says ...
Sunday, April 24, 2016 by Jessica

Science
Why is it important for the substances to start at the same temperature??
Sunday, April 24, 2016 by saliha

Science
I am doing an extension to get into the AP Biology course offered by my school. This particular extension asked me to use vinegar and baking soda aswell as some basic scientific tools to find the concentration of acetic acid in vinegar. I wanted to know what a procedure for ...
Sunday, April 24, 2016 by Connor

mathslit accounting life science tourism
what am I become with these sub guys help plz
Sunday, April 24, 2016 by mlingo high by malondy

Science
Four equal point charges each 16 microcoulomb are placed on the four corners of square of side 0.2m.Calculate the force on any one of the charge.
Sunday, April 24, 2016 by Abibsha

science
An athlete runs along a circular track of radius 20m.Calculate the distance and displacement covered by him after completing one and a half round.
Sunday, April 24, 2016 by k. navin

science
A 5 C charged is placed on the 0 cm mark of a meter stick and a - 4 C charged is placed on the 50 cm mark what is the electric field at the 30 cm mark
Sunday, April 24, 2016 by teto

science
H2SO4 is labeled 93.2% and density 1.94g/cm3. Find moles in H2SO4?
Sunday, April 24, 2016 by chris

Science
What is conductor
Sunday, April 24, 2016 by Abhishek

science
what is the function of pore in a cell membrane
Saturday, April 23, 2016 by carmelita

Natural science
What happens to the level of the salt solution in the distilling flask ? Explain why this happens
Saturday, April 23, 2016 by Phumelele

Computer science
How do I count how many arrays there is - what do I add to the code? I have managed to create 2 buttons and the top button works and changes the fruits into alphabetical order but the second button doesn't work - please help! <!DOCTYPE html> <html> <body>...
Saturday, April 23, 2016 by Anonymous

life science, maths lit,agric,geography, life orie
Criticality discuss six way that human Rights violation influence individually, groups and broader south African community
Saturday, April 23, 2016 by shaima

science
6co2(aq)+ 12h2o(l) c6h12o6(aq)+6o2(aq)+602(a90 q)+6h2o
Friday, April 22, 2016 by priti

Science/Math
A car is travelling at a speed of 30.0m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop at -4.0m/s^2
Friday, April 22, 2016 by Josh

Science
An atom has a mass number 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.
Friday, April 22, 2016 by Alysa

science
describe fully the image of a candle flame located 10 cm from a concave spherical mirror with a radius of curvature of 16 cm
Friday, April 22, 2016 by Zura

H/science
What Is Health Science
Friday, April 22, 2016 by Allieu

science
What will happen when titanium reacts with oxygen?
Friday, April 22, 2016 by Mathew

science
The cohrence length of a light source is 2.45×10raise to power-2 calculate width of spectral line
Friday, April 22, 2016 by annie

science
write down the possible terms of one electron system corresponding to n=2
Friday, April 22, 2016 by annie

science
find the energy of first excited state of helium
Friday, April 22, 2016 by annie

Science
17g of AgNo3 is trated with 25g of HCl. what is the mass of AgCl formed and what is the limiting reagent
Thursday, April 21, 2016 by Anonymous

Science
Workers needed to pass oxygen from lungs into blood vessels and welcome carbon dioxide into the lungs
Thursday, April 21, 2016 by Alandra

Science
Andrew is 10 years old and loves to climb trees. Andrew fell while climbing his favorite magnolia tree and broke his ulna. The x-ray reveals that the injured ulna is broken into 4 small pieces. What type of fracture is this? a. incomplete b. complete c. comminuted d. ...
Thursday, April 21, 2016 by AMG,RN,BSN

science help pls pls
Jupiter is 5.2 AU from the sun. What is its distance from the sun in kilometers? 28,846 km 78,000 km 28,846,153 km 780,000,000 km is it d pls help
Thursday, April 21, 2016 by Oscar

Science/ Biology/ patho
3. A 32-year-old man comes to his physician complaining of frequency, dysuria, and urgency for several days, as well as pain in the perineal region. The digital rectal examination is extremely painful. He most likely has A. A primary chancre of syphilis in his genital organs B...
Thursday, April 21, 2016 by AMG,RN,BSN

Science/Biology/Anatomy/Patho
10. Functions of the nephron include all of the following except A. Reabsorption of urea nitrogen B. Fluid homeostasis C.Maintaining electrolyte balance D.Regulation of blood pressure E. Maintaining blood pH I think A but really stuck between A & B
Thursday, April 21, 2016 by AMG,RN,BSN

science
What are the factors that influence the rate of reaction??
Wednesday, April 20, 2016 by Seragatlala Dakalo Oscar

Science
What is water vaper
Wednesday, April 20, 2016 by Addison

Science
Hi, I have to revise for an upcoming test and I was a little bit confused about selective breeding. Please help Jiskha :)
Wednesday, April 20, 2016 by Stoof

science
the solubility of an unknown substance is 120 grams of water at 70 degrees celsius. What is it?
Wednesday, April 20, 2016 by Justin

science help PLS
When Jane visits a beach, she notices a sea stack has formed offshore. Which of the following best describes what caused the sea stack to form? Erosion hollowed out the rock in a seaside cliff. Deposition moved sand from the beach into an offshore pile. A large number of ...
Wednesday, April 20, 2016 by Oscar

science
can you please tell me some alkalis you would have in your house xxx
Wednesday, April 20, 2016 by Anonymous

Science
calculate the weight acting on an object of mass 10kg Taking g=10m/s
Wednesday, April 20, 2016 by EDGAR

Science
what volume of NH3 gas at s.t.p. is required to neutralise 40cm3 of 2M H2SO4?
Wednesday, April 20, 2016 by Anonymous

science
To conserve water, an animal's kidneys can pump ions across cell membranes, allowing water to move by
Tuesday, April 19, 2016 by Steve

Political Science
You learned about the Democratic Peace Theory. Define this theory. Explain its strengths and weaknesses. Tell how it has been used to inform public policymaking. Now, explain whether you think it should be used in public policymaking, and why in a 250-300 words response.
Tuesday, April 19, 2016 by Scinceis

science
when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. what mass of silver is produced from 100.g Cu?
Tuesday, April 19, 2016 by Sandy

Science- Electric and Magnetic Potential Energy
1. At which position will the bar magnets most likely experience the least magnetic potential energy between them? D - position 4 2. A positively charged test object is moving toward the positive source charge in an electric field. B - It's potential energy increases 3. ...
Tuesday, April 19, 2016 by ImLegit

science-college physics
2. A certain wire of length L, cross-sectional area A is extended by an amount ‘e’ by a force F. Given that the young’s modulus of the material of the wire is E, Show that the; a. Energy stored in the wire is given by the expression (5) b. Energy per unit volume...
Tuesday, April 19, 2016 by hamunyela morga

science
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body. C. A living thing dies and its skeleton is left exposed to ...
Tuesday, April 19, 2016 by Help please

science
how to find a solution with high buffer capacity?
Tuesday, April 19, 2016 by ayya

science
find the resistance of a nichrome wire of length 2.2m& diameter 2mm.
Tuesday, April 19, 2016 by Samiksha

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