Tuesday
May 24, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

science
You observed light passing through lenses and through a set of prisms. Why does refraction occur?
Monday, March 21, 2016 by help pls

science help please
1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point) It will move due to inertia. Gravity will eventually cause it to move. It will stay at rest due to inertia. It will stay at rest due to gravity. 2. A 2,500 kg ...
Monday, March 21, 2016 by PlsHelp

SCIENCE
History of how this ginger has been used as medicine
Monday, March 21, 2016 by coolguy321

Science
What's the difference between the types of light detected by radio, refracting, and reflecting telescopes?
Monday, March 21, 2016 by Anonymous

SCIENCE
History of how this ginger has been used as medicine
Monday, March 21, 2016 by coolguy123

science help ASAP
can someone Explain the process of succession plz
Monday, March 21, 2016 by sunshine

Maths lit,life science,agriculture,geograph
Plzzz help me which carree can i choose?
Monday, March 21, 2016 by Pat

Science
Belonging to one communtity
Sunday, March 20, 2016 by Jensy

Science AP Chemistry
It is necessary to add iodide ions to precipitate the lead(II) ions from 250 mL of 0.076 M Pb(NO3)2(aq). What minimum iodide ion concentration is required for the onset of PbI2 precipitation? The solubility product of PbI2 is 1.4 × 10−8 . Answer in units of mol/L. ...
Sunday, March 20, 2016 by Jacaria

science
How much sodium bromide do I need to make 100 ml of 0.2m solution?
Sunday, March 20, 2016 by margaret

math lit,life science,agriculture,geogrphy,L.O,
Which good career path is good for the following subject
Sunday, March 20, 2016 by Thulani

Science
a bullet with mass 0.281 kg is fired from a rifle. It stick into a block of wood with a mass of 17.8 that was at rest. The block/bullet combo moves at 3 m/s. What was the initial velocity of the bullet?
Sunday, March 20, 2016 by lara

politcal science
As of January 2015, how many members of the House of Representatives and the Senate are NOT members of the Democratic or Republican party? 0 123 100 2
Sunday, March 20, 2016 by Gary

politcal science
Which of the following is NOT one of the Republican party factions? Fiscal Conservatives Libertarians Organized labor Neoconservatives
Sunday, March 20, 2016 by Gary

politcal science
Who is the only third-party candidate to win more than 25% of the popular vote? Question 7 options: Millard Fillmore Theodore Roosevelt George Wallace Ralph Nader
Sunday, March 20, 2016 by Gary

politcal science
In Washington's Farewell Address, what type of policy did he advocate when dealing with foreign countries? Question 6 options: Complete isolation for all foreign countries Extensive treaties with other countries Expansion of US power over foreign countries Neutrality in ...
Sunday, March 20, 2016 by Gary

science help PLS
Which of the following types of stars started out on the main sequence with the largest initial mass? In Graph A, the curve peaks at 800 nm, in the red section of the visible light spectrum. In Graph B, the curve peaks at 550 nm, in the green section of the visible light ...
Sunday, March 20, 2016 by Oscar

History ,life science,Geography,Lo,Maths lite,English and Setswana
Careers in history
Saturday, March 19, 2016 by Palesa

science
interpret the number of moles of oxygen atoms in po3- 4
Saturday, March 19, 2016 by aman

7th Grade Science
Hi, I really need help with this. I'm supposed to find information about biodiversity and fishing or housing and answer these two questions: "What challenges does [your topic] pose to biodiversity? What do you think should be done and why?" The websites my school...
Friday, March 18, 2016 by Music Lover 14

Science
Two teams are pulling on a rope. Team 1 pulls with a force of 124 newtons, while team 2 pulls with a force of 110 Newton in the opposite direction which of the following correctly describes the motion that will result A. Team 1 will move, team 2 will not B. Team 2 will move, ...
Friday, March 18, 2016 by Tonya

science HELP ASAP
water condenses onto the grass in the early morning when the air is clear because? a. the air near the ground in warmer than the ground b. the air cools to the dew point c.the relative humitidy decreases D. the presence of carbon dioxide causes water to form
Friday, March 18, 2016 by connections

Science
Please Check! 1. How does nanotechnology help 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 material's atomic structure, its physical properties can also be ...
Friday, March 18, 2016 by SpitFireRedHead

Science
Which of the following is a way that some animals' bodies adapt to living in extremely cold climates? A.clusters B.hibernation C.burrows** D.estivation Help Please
Friday, March 18, 2016 by no name

Science Please Check
Please Check 1. How does nanotechnology help 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 material's atomic structure, its physical properties can also be ...
Friday, March 18, 2016 by Blair

Science
is there a chart available that show the vapor pressure of Isopropyl alcohol and water solutions at 68 degrees F ?
Friday, March 18, 2016 by Daniel

science
Briefly describe how you would prepare 500cm of 1mole of NaCl solution in the laboratory.(Na-23,Cl-35.5)
Friday, March 18, 2016 by Precious Appiah

Science
What is a real-world example for biochemical conversion?
Thursday, March 17, 2016 by Rey

science
four ways humans use natural resources
Thursday, March 17, 2016 by mattiwe

SCIENCE NOW
name two hormones produced by the ovaries and explain what they do?
Thursday, March 17, 2016 by coolguy321

science
during which phase can fertilization occur A. phase 1 B. phase 2 C. phase 3 D. any of the phases *******? more info phase 1 is between 1-7 phase 2 is between 7-14 phase 3 is between 14-28
Thursday, March 17, 2016 by coolguy321

Science
How does sea-floor spreading occur? A, New materials are being added to the asthenosphere. B, Earthquakes break apart the ocean floor. C, Sediments accumulate at the area of spreading. D, Molten material beneath Earth's crust rises to the surface. •• 2, Which ...
Thursday, March 17, 2016 by Tanner fox

Science
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 been discovered in South America...
Thursday, March 17, 2016 by Tanner fox

Science
ing to Wegener's hypothesis of continental drift,? A.Earth's surface is made up of seven major landmasses. B.the continents do not move. C.Earth is slowly cooling and shrinking. D.the continents were once joined together in a single landmass.•• Correct me plz
Thursday, March 17, 2016 by Tanner fox

science
You wish to obtain a magnification of -2 from a convex lens of focal length f. The only possible solution is to?
Thursday, March 17, 2016 by steve

science
the density of an object with a volume of 60.0 mL and a mass of 400.0g is___? a. 0.150g/mL b. 2.89g/mL c. 5.50 g/mL or d. 6.67 g/mL
Thursday, March 17, 2016 by erin

Science
1. Which climate is warm, wet, and located on the edges of the tropics? A. temperate marine B. highlands C. temperate continental D. polar 2. Which statement best explains why tropical climates are so hot? A. They receive little rain B. They receive more direct sunlight than ...
Thursday, March 17, 2016 by Kpop is real

science
1. Two point charges 4 μC and 2 μC are separated by a distance 1 m in air. At what point on the line joining the two charges is the electric field intensity zero?
Thursday, March 17, 2016 by deeps

science
If the number of loops on an electromagnet increases, the strength of the magnet will?
Thursday, March 17, 2016 by Amber

Earth Science (check answers)
Describe the importance of maintaining the ocean ecosystem. It is important to maintain because the ocean ecosystems because it provides reefs that support a complex ecosystem of ocean organisms that live and help each other to survive. Virtually every phyla on Earth is ...
Thursday, March 17, 2016 by Sue

science(physics)
A 2kg stone is droped from the top of a 20m building a)what potential energy does it posses b)At what height does its potential energy become equal to its kinetic energy? c)what is its kinetic energy just before it hits the ground? d)With what velocity does it reach the ground...
Thursday, March 17, 2016 by joe john

math
In an examination 70 student failled in math¡A90failed in science and 20 failed in both. if 80 student passed in math using venn-daigram¡A find how mamy student were passed in both subject¡H
Thursday, March 17, 2016 by suresh kunwar

science
hello! just needing help with this question. Why does milk have to be an emulsion to be considered a complete food?
Thursday, March 17, 2016 by Jaye

science
state the type of transformation of energyin a dry cell discharges and in a hydro electric power plant.
Thursday, March 17, 2016 by rijo

science
A 12V battery has 6cells in series. The E.m.f of the battery is 13.8V and the load drawing 10amp is connected to the battery. THe PD is now 12.0V. Calculate the internal resistance per cell of the battery
Thursday, March 17, 2016 by funi

science physics
A penny is dropped from a window and takes 1.82s to reach the ground. From what height was it dropped.
Wednesday, March 16, 2016 by melisa

Science
1. Which of the following best describes the movement of an object at rest if no outside forces act on it? (1 point) It will move due to inertia. Gravity will eventually cause it to move. It will stay at rest due to inertia. It will stay at rest due to gravity. Physics 2. A 2,...
Wednesday, March 16, 2016 by Tanner fox

Science
Sammy and Andy wanted to measure their classroom. Would this work? Why or why not
Wednesday, March 16, 2016 by Ana

Science
15)Which of the following shows the correct sequence of what happens to the water molecules in an ice cube when it is removed from the freezer? 1. the molecules gain enough energy to break free from each other. 2. the ice begins to melt 3. the molecules vibrate in a fixed ...
Wednesday, March 16, 2016 by #FreeGucci

Science
13.)How can substance A and B be compared? Choose all that apply. A.)The particles of substance A have more energy than the particles of substance B.*** B.)The particles of substance A are more tightly held together than the particles of substance B. C.)The particles of ...
Wednesday, March 16, 2016 by #FreeGucci

Science
Describe the importance of maintaining the ocean ecosystem.
Wednesday, March 16, 2016 by Sue

Science
What should I take next year? I am in the 5th grade. I want to know what classes i should take for 6th grade.
Wednesday, March 16, 2016 by Lokelani Kekumu

Science-The Solar System
What are two major differences in the composition of the inner and outer planets? I know that the inner planets are small, hard, and rocky, and the outer planets are large and gaseous. What is another difference?
Wednesday, March 16, 2016 by Person

Science
Q: Mant people who care about natural resources would choose to use wind power at their homes. however, wind power is not an option for people in many parts in the country. Explain what benefits of wind power are and why is it not available to everyone in the U.S. In your ...
Wednesday, March 16, 2016 by MissGeek

Science
2. A country commissioner wants to reduce the amount of waste sent to the local landfill. Which of the following would result in the greatest reduction of waste? -composting food waste -recycling glass plastics and metals -reusing rubber leather and textiles in new products...
Wednesday, March 16, 2016 by Nobody Stalk Me please :)

Science
How does the principals of convection, conduction, and radiation explain how the water in the saucepan gets hot?
Wednesday, March 16, 2016 by Summer

science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Wednesday, March 16, 2016 by jai

maths,agricultur;life science,business
identify three courses or study fields you are interestedin following after grd12.write them down in order of preference.provide 2 reasons why you find this a suitable course for each choice
Wednesday, March 16, 2016 by precious

Science
A slab of granite has a mass of 1400.0 grams. The specific heat of granite is 0.040 J/gC. How much heat must be absorbed to raise the granite slab's temperature by 75 degrees C? 11.8 kJ 80.5 kJ 88.2 kJ 19.5 kJ I've tried solving this several times and I never get one ...
Wednesday, March 16, 2016 by Rachael

physical science
Balance of the following equation Ca+O2=CaO
Wednesday, March 16, 2016 by mariana

Math literature, Life Science, Geography and Tourism
What job can I do will doing those subjects
Wednesday, March 16, 2016 by TEBOGO

U.S. History
I have to do a slide presentation, and just needed some ideas to write about. Students will create a 3-slide presentation on any development in culture, science, and technology from 1914-1945, in America. So can you give me some ideas to write about?
Wednesday, March 16, 2016 by Jay

science
acetic acid has a pka of 4.8 how many ml of 0.1M acetic acid and 0.1M sodium acetate are required to prepare 1L of 0.1M buffer with a PH of 5.8? solve
Wednesday, March 16, 2016 by ruth

Science
1. Which of the following about the suns structure is true? A.The sun has a solid surface. B. The sun has an interior and an atmosphere. * C.The sun's is similar to Earth's; it has a core, mantle, and crust. D. The sun's outermost layer is called the radiation zone.
Tuesday, March 15, 2016 by TeamWork

Science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs The greatest amount of living organisms can be found in the photic zone where sunlight can penetrate water, and where organisms that photosynthesize depend on sunlight. ...
Tuesday, March 15, 2016 by Sue

Science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs The greatest amount of living organisms can be found in the photic zone where sunlight can penetrate water, and where organisms that photosynthesize depend on sunlight. ...
Tuesday, March 15, 2016 by Sue

Science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs The greatest amount of living organisms can be found in the photic zone where sunlight can penetrate water, and where organisms that photosynthesize depend on sunlight. ...
Tuesday, March 15, 2016 by Sue

Earth science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs
Tuesday, March 15, 2016 by Sue

7th Grade Science About Mitosis & Meiosis
Hello, I really need help about mitosis and meiosis. So in my project, it asks me to explain three differences between mitosis and meiosis. I only have one difference and this is what I wrote: Mitosis-A type of cell division in which daughter cells are identical to parent ...
Tuesday, March 15, 2016 by Music Lover 14

Science: Physics
mr. slott at his fighting weight of 1000N jumps down from a platform meters above a trampoline with a spring constant (k) of 500N/M. How much does Mr.Slott strech the trampoline (x) before it brings him to a stop
Tuesday, March 15, 2016 by James

science
How are Earth and Venus similar ? How are they different? give 2 similarities and 2 difference thanks
Tuesday, March 15, 2016 by UNKNOWN

Science, don't leave me hanging plz.
1. Which of the following describes how matter moves between producers, consumers, and decomposers in an ecosystem? A. one-way flow from producers to consumers to decomposers. B. one-way flow from decomposers to consumers to producers. C. cyclic flow from producers to ...
Tuesday, March 15, 2016 by Rhonny

Science
Hi, can someone explain how cell membranes and their components participate in intercellular signaling. Maybe give an example of cell membrane involvement in one particular type of cellular signaling.
Tuesday, March 15, 2016 by Brent

Science
Can someone describe the G protein receptor system and the tyrosine-kinase receptor system. I wanna know how these two systems are similar and how these two systems are different in their of structures and functions.
Tuesday, March 15, 2016 by Elain

Science
If it requires 23.4 milliliters of 0.65 molar barium hydroxide to neutralize 42.5 milliliters of nitric acid, solve for the molarity of the nitric acid solution. Show all of the work used to solve this problem. Unbalanced equation: Ba(OH)2 + HNO3 -> Ba(NO3)2 + H2O
Tuesday, March 15, 2016 by Elain

science
If the density of Hg is 13.53 and 62.5 respectively. How many grams,moles,atoms of Hg do you have?
Tuesday, March 15, 2016 by Raphael

Science
using the equation c3h5+5o2=3co2+4h2o, calculate the mass of c3h8 that can produce 100g of h2o
Monday, March 14, 2016 by Abednego

Life Science
The process by which cellular material is divided between two new cell. (2 words)
Monday, March 14, 2016 by Isabella

Science
Two equal vectors are working at a point.The resultant is equal to one of those vectors.Prove that the resultant bisects the angle between the vectors.
Monday, March 14, 2016 by Julekha

Health
Which profession should a person who suffers from chronic asthma probably stay away from? A. Criminal attorney <<<<< B. Earth science teacher C. Grocery store manager D. veterinarian.
Monday, March 14, 2016 by Help pls quick

science
how does the weight placement in a rocket effect the distance
Monday, March 14, 2016 by santi

Science Experiment Help (pt 2)
did the experiment (correctly this time), still need help with the answer to this question: What other mixture can be separated by crystallization? thnx for the help!
Monday, March 14, 2016 by Aly

science
What is density of acetone at 23°C
Monday, March 14, 2016 by anjali

math
Jorge has prepared his science project on a piece of poster board that has an area represented by the trinomial x2 + 5x – 50. a) What are the dimensions of the board? b) Write an expression for the perimeter of the board. c) What is the actual perimeter of the board if x...
Monday, March 14, 2016 by Anonymous

English
Social studies is fun/difficult/easy/interesting/exciting.​ Math Is _________. Science is _________. -------------------------------- Other than the adjectives above, what other adjectives can we use for the blank? Can you name suitable adjectives?
Monday, March 14, 2016 by rfvv

science
When the ray of light travels from air to glass slab and strikes the surface of separation at 90 degree , then it ..........
Monday, March 14, 2016 by rohit

science
A balloon filled with 3.5 L of helium at 20 °C and 3 atm. What will be the new pressure if its volume increases to 17.5 L at constant temperature?
Sunday, March 13, 2016 by Anonymous

science
How can geothermal energy affect the use of fossil fuels?
Sunday, March 13, 2016 by reiley

Science
A car is traveling north at 15 m/s ten minutes later it is traveling at 70 m/s what is the car s initial velocity what is its acceleration
Sunday, March 13, 2016 by Kathy

science computer
Write a program to read the names and age of 10 people and print the name of the oldest person.assume that there are no person of the same age.data is supplied in the following form:name,age,name,age
Sunday, March 13, 2016 by k

Science Experiment Help
Just need help answering this one question for my science experiment: "Name another mixture that could be separated like the sugar-water mixture." the sugar-water turned into caramel when I heated it... so what other mixtures do that? Thnx for the help! Aly
Sunday, March 13, 2016 by Aly

science
If I mix 300g of reactant A with 100g of reactant B in a close system how much will it weigh
Sunday, March 13, 2016 by donna

Science
How many Btu's are required to change five pounds of ice at 20°F to water at 160°F? a. 2,608 Btu’s b. 1,390 Btu’s c. 1,304 Btu’s d. 141 Btu’s I am trying ((160-20)x.5)x5 but not getting any of the possible choices. What am I missing? Thanks for ...
Sunday, March 13, 2016 by Chris

SCIENCE
At 500K,1.00mol of ONCl is introduced into 2.50dm3 closed vessel.At equilibrium the ONCl is 6.5%dissoiated.What is the value of the Kc for equilibrium at 500K
Sunday, March 13, 2016 by MAMBWE

computer science
Write a java program that reads from the user the course code, section and the scores of a student for three exams representing two midterms and a final. The percentage of each of the three exams is of fixed value 30, 30 and 40 percent respectively. Your program computes the ...
Sunday, March 13, 2016 by rayn

Science
Volume of 12M HCL taken for preparing 1M HCL (100 ml Sol {
Sunday, March 13, 2016 by Bushra

Science
chemical equation for sodium hydrogen carbonate and acetic acid (not balanced)
Sunday, March 13, 2016 by Sai Swarup

science
initial condition V1= P1= formula
Sunday, March 13, 2016 by beah

science
A ball from a height 'h' on a horizontal floor.If it loses 60% of its energy on hitting the floor then height upto which it will rise after first rebounce is?
Saturday, March 12, 2016 by anagha

Science
A ball thrown vertically upward has a speed of 5.0 m/s at a height of 3.0m. The mass of the ball is 1.2 kg. Find its mechanical energy
Friday, March 11, 2016 by Karl

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