Wednesday
June 29, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

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

computer science
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 provided. Additional hours are...
Monday, April 18, 2016 by ignatius

computer science
Write a program that will ask the user to enter the amount of a purchase. The program should then compute the state and county sales tax. Assume the state sales tax is 4 percent and the county sales tax is 2 percent. The program should display the amount of the purchase, the ...
Monday, April 18, 2016 by ignatius

science
a certain mass of gas occupies 600 cm3 and exerted 1.325*10^5 Nm^-2 pressure. at what temperature would the volume of the gas be halved?
Monday, April 18, 2016 by Anonymous

Science HELP PLEASE!!!
I cant get this stupid question, this is disgusting and I just want to get this over with. What the word for when blood rushes towards your !@#$%^& and gets bigger. A. Erection B. Sperm C. !@#$%^& D. Puberty
Monday, April 18, 2016 by Cynthia

science
what can you infer from the fact of all life on earth is related f you go back far enough?
Monday, April 18, 2016 by hey

Science
Write a paragraph or make a PowerPoint to explain how genetic variation and environmental pressures can lead to change in an organism. Write a second paragraph that describes an example of a plant or animal that has changed due to these factors.
Monday, April 18, 2016 by Brii

Science
Daltons idea that atoms cannot be divided into smaller parts was was disproved by the discovery of______? The description of the structure of the atom is called the________? In a water molecule, two atoms of hydrogen and one atom of oxygen shared electrons. A _________ bond is...
Monday, April 18, 2016 by Summer Moriarty

science
What is osmosis
Monday, April 18, 2016 by mihlali

science and calculations
Calculate the heat necessary to raise the temperature of 500kg of water in the generator of the refrigerator from 10degree Celsius to 40degree Celsius. The specific heat capacity of water equal to 4.2kj/kgk
Monday, April 18, 2016 by Augustine

science-college physics
1. A mass of 20 kg is suspended at the end of a rubber cord of diameter 2.0 mm and length 100 cm. Find the period of vertical oscillations of the mass. [Take young’s modulus E, for the rubber = 2.0 x 108 Nm - 2].
Monday, April 18, 2016 by hamunyela morga

Science (energy)
1. What similarities do nuclear energy and chemical energy share? Choose all that apply. A. Both are types of kinetic energy. B. Both are types of potential energy. [CORRECT!] C. Both involve magnetic energy. D. Both involve stored energy. [CORRECT!] 2. A student is trying to ...
Monday, April 18, 2016 by newbie

physical science
How long will a 1.2 kW electric kettle take to heat 0.8 kg of water from 20°C to 100°C?
Sunday, April 17, 2016 by yah

science
a boy whose mass is 69kg climbs a tree 10m high in 12s .calculate the work done and power developed
Sunday, April 17, 2016 by latela

Science
What obstacles did Darwin's theory of natural selection and evolution face and how did he overcome these? I know one would be scientists in those days having different theories (obstacle)...
Sunday, April 17, 2016 by Stoof

Science
Why the earth rotate each 24 hours?
Sunday, April 17, 2016 by The earth

Science
A man walks 5m towards east and turns right and moves 12m. The magnitude of displacement is
Sunday, April 17, 2016 by Sivasaran

science
carbon moboxide reacts with hudrogen to produce methanol chemical equation: balanced equation:
Sunday, April 17, 2016 by sTanley

Physics
Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th Grade 7th Grade 8th Grade High School 9th Grade 10th Grade 11th Grade 12th Grade College Adult ...
Sunday, April 17, 2016 by Rameel

Science
A car of mass 1200kg increases its velocity from 20m/s to 60m/s in 8seconds. Calculate the acceleration force on the car.
Sunday, April 17, 2016 by Lucky chembe

science
a helium nuclide of mass M1 moving with a velocity Vo is incident on a stationary nuclide of mass M2. After collision M1 was deflected through an angle x and M2 an angle y. If the velocities of the nuclides after collision were V1 and V2 respectively show that for an elastic ...
Sunday, April 17, 2016 by Henry

maths littercy ,agricultural science ,life science ,tourism , life orientatiom, ndebele and english
i completed my matric last year , now i dont know which carrer should i do or follow and in which college or university
Sunday, April 17, 2016 by simphiwe

science
A charge of 10 coulombs has been travelling through the wire of a simple circuit,with a current of 3 A. How long has the current been flowing?
Sunday, April 17, 2016 by mihlali

science
how does the electric field in space change when the air in the space is replaced be dielectric oil?
Sunday, April 17, 2016 by mukul

science
How is the virtual image produced by a converging lens different from the virtual image from a diverging lens?
Saturday, April 16, 2016 by tina

Science
Write a paragraph or make a PowerPoint to explain how genetic variation and environmental pressures can lead to change in an organism. Write a second paragraph that describes an example of a plant or animal that has changed due to these factors. Include graphics or pictures.
Saturday, April 16, 2016 by Aaliyah

science help pls
Which of the following is a technique used in relative dating? Beta decay Index fossil correlation Isotope ratios Radiocarbon dating is it d pls help me
Saturday, April 16, 2016 by Oscar

science help PLS
Examine the following diagram. Place the labeled layers in order from youngest to oldest. Diagram showing a section of rock strata. The bottommost layer is labeled 'A'; the layer directly on top of layer A is labeled 'B'; the layer directly on top of layer B is...
Saturday, April 16, 2016 by Oscar

ph science
a flight attendant pulls a wheeled suitcase, applying a 64-N force at a 35 degree angle to horizontal. how much work does she do in pulling the suitcase 45m f=d/t=64+35=99/2x45=2227.5
Saturday, April 16, 2016 by dana

science
A wagon 8kg travelling due east with a velocity of 10m/s collides with a second wagon of mass 12kg travelling due west at 2m/s. After collision the wagon moves off at 3m/s due east. Determine the magnitude and direction of the velocity of the 12kg wagon after collision.
Saturday, April 16, 2016 by Lucky chembe

science
assuming that sea water is an aqueous solution of NaCl its density is 1.025g/mL at 20C temperature and NaCl concentration is 3.5%(by mass), the normality of the sea water?
Saturday, April 16, 2016 by rajesh

help ms. sue/ science
how is a parallel circuit different from a series circuit? Need help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!​!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!​!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!​!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!​!!!!!!!!!!!!!!!
Friday, April 15, 2016 by Sally

science help pls pls
A scientific law can be best described as an explanation of a specific relationship a series of observations with contradictory data a phenomenon which works under changing conditions a description of specific relationships under given conditions is it a pls help me
Friday, April 15, 2016 by Oscar

science help pls pls
Derek designed an experiment to demonstrate interactions between Earth systems. He cleared a patch of land in his backyard and poured a glass of water from a height of 12 inches above the ground. A depression was formed on the land at the spot where the water hit the ground. ...
Friday, April 15, 2016 by Oscar

i really need help with science pls help
A scientific theory is proposed after several valid investigations. This makes scientific theories elaborate descriptions of observations the most powerful explanation scientists have to offer unchangeable by other scientists over a period of time unacceptable to a majority of...
Friday, April 15, 2016 by Oscar

i really need help with science pls help
The Hawaiian Islands are examples of islands that formed over a hotspot. Based on this information, which of the following processes formed the Hawaiian Islands? Melted rock called magma rose through holes in Earth's crust and gradually solidified as it cooled. Tectonic ...
Friday, April 15, 2016 by Oscar

science help
Which of the following sets of characteristics describe what we know about the dwarf planets? Orbits the sun, has sufficient mass to assume a nearly round shape, and lacks the gravity to clear items near its orbit. Has sufficient mass to maintain a round shape, orbits the sun...
Friday, April 15, 2016 by Oscar

science help pls pls pls
A new object, Object Y, was discovered outside our solar system. Object Y is small and rocky, is not a satellite of any other object, and it does not have enough gravity to clear away smaller objects near its orbit. The characteristics of Object Y most closely resemble those ...
Friday, April 15, 2016 by Oscar

science help pls pls
Which of the following terms refers to the foamy bubbles of a breaking wave? Duration Fetch Speed Surf is it d pls help me
Friday, April 15, 2016 by Oscar

science pls help
Which of the following causes the formation of surf on a breaking wave? Beach erosion Low wind speeds Deposition of sand on a beach Friction with the ocean bottom at the coast is it d pls help me
Friday, April 15, 2016 by Oscar

Science
11.)Create a scale for your model thermometer. Divide the distance between the two marks into 5-mm intervals. Starting with the lowest point, label the intervals on the straw 0, 1, 2, 3, and so on. Describe your scale below.
Friday, April 15, 2016 by #FreeGucci

Math
40 students are in the science club. 45% are girls. New girls enter the club and now the percentage of girls is 56%. How many new girls join the club?
Friday, April 15, 2016 by Laurie

Science "HELP"!
Passage:The particles of matter are in constant motion. The energy of motion is called kinetic energy, so the particles of matter have kinetic energy. As matter becomes warmer, its particles move faster. As a result, their kinetic energy increases. Temperature is related to ...
Friday, April 15, 2016 by #FreeGucci

I REALLY NEED HELP WITH THIS SCIENCE
The three things you can sort them into are: Executive branch, Legislative branch, and Judicial branch. Things you can sort are: crafts bills, directs military, interprets laws, declares wars, decides court cases, can impeach president, vetoes bills, decides if laws are ...
Friday, April 15, 2016 by Patrick

science
a rock is thrown 1.8 meters into the air. find how fast it was thrown?
Friday, April 15, 2016 by stacy

Writing/ Science
I need help formulating topics for an essay. Topic: Why is it important to learn about local energy programs. How will one benefit from it. Thank you
Thursday, April 14, 2016 by Engineer

i need help with science pls
PLEASE HELP ME! Uranium can supply energy for the world's electricity without emitting harmful greenhouse gases. Which of these statements best describes an outcome of uranium mining? a. The people living near the mines may suffer from diseases due to radiation b. The ...
Thursday, April 14, 2016 by Oscar

i really need help with science pls help
One student made the incomplete diagram shown below to represent the relationship between magma, igneous rocks, and metamorphic rocks. Individual labels for Magma, Igneous rocks, and Metamorphic rocks set up in a triangular shaped diagram. Which of these is the correct next ...
Thursday, April 14, 2016 by Oscar

i really need help with science pls help
Two groups of scientists got different results while studying about the origin of the universe. Which of these statements is most likely true about the results of the two groups of scientists? They were not repeated and verified. They provide new testable ideas to strengthen ...
Thursday, April 14, 2016 by Oscar

science help pls pls
Which statement best explains why the Big Bang Theory is the leading scientific explanation of the development of the universe over time? Its experiments reject all old theories on the origin of the universe. Its experiments yield different results every time they are repeated...
Thursday, April 14, 2016 by Oscar

science help pls pls
Infrared radiations are produced when a changing electric field creates a longitudinal wave parallel to it longitudinal wave perpendicular to it changing magnetic field parallel to it changing magnetic field perpendicular to it is it d pls help me
Thursday, April 14, 2016 by Oscar

Science
Do all organisms get the same amount of energy? Why or why not? I would think that organisms get different amounts of energy since some need more and others need less. Like a plant would need different amounts of energy from a bear. A plant would get more energy, it is a ...
Thursday, April 14, 2016 by Scarlet

science
calculate weight by volume for 0.8molal urea,density of solution is 1.14gram per ml
Thursday, April 14, 2016 by kk

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