Thursday
December 8, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science
A 55 kilogram person and a 65 kilogram person climb 8 meters up a flight of stairs in 10 seconds. Compare power used by each person
Thursday, March 3, 2016 by abdul

Weight Is Force! Science
A space ship has a mass of 9000kg. the space ship is launched from Earth and lands on a distant planet where it has a mass of 390000 N. What is the acceleration of the gravity on this planet?
Thursday, March 3, 2016 by Anonymous

physical science
a symmetric projectile spends a total of 20 seconds in the air. it reaches a peak height of 8 meters. how long does it take to reach its peak height? the projectile has a range of 80 meters. what is its horizontal velocity? what is the projectile's horizontal acceleration...
Thursday, March 3, 2016 by anita

physical science
a flower pot is dropped out a twentieth story window. how fast will it be moving after 7 seconds? how much is the acceleration 3 seconds after it falls?
Thursday, March 3, 2016 by anita

Weight Is Force! Science
A space ship has a mass of 9000kg. The spaceship is launched from the Earth and lands on a distant planet where it has a weighted of 39000 N. What is the acceleration of gravity on this planet?
Thursday, March 3, 2016 by Cheetah Veite

physical science
a piece of metal has a mass of 85 cg and a volume of 450L. What is its density in g/cm^3? What would be the mass of 300cm^3 of this metal? What would be the volume of 200 ounces of this metal?
Thursday, March 3, 2016 by anita

physical science
how many centimeters long is the proverbial "10 foot pole?" show work
Thursday, March 3, 2016 by anita

Science
A girl standing on a bridge throws a stone vertically downward with an intial velocity of 15.0 m/s into the river below. If the stone hit's the water 2.00 seconds later what is the height of the bridge above the water?
Thursday, March 3, 2016 by Tyler

science help pls pls
The table below shows the average annual precipitation over a period of five years in three locations of Florida. Locations | Amount of precipitation 1 between 45- 65 inches 2 more than 96 inches 3 less than 8 inches Which of these statements is correct for the three locations...
Thursday, March 3, 2016 by Oscar

science help pls pls
Which of these is an example of how the ocean plays an important role in climate change? The warm Gulf Stream helps maintain moderate temperature in coastal regions in southern Florida. Aquatic animals produce carbon dioxide during respiration which causes warming of ocean ...
Thursday, March 3, 2016 by Oscar

science help pls pls
A student designed an experiment to demonstrate the interaction between Earth systems. The steps of the experiment are given below. *Take a pot full of dry soil. *Keep the pot in direct sunlight. *Do not water the soil for a week. *Observe cracks in the soil after a week. The ...
Thursday, March 3, 2016 by Oscar

Science
Which of the following is not a benefit of wetlands? a) wetlands provide a place for exceptional weather to occur** b) wetlands provide a habitat for fish and wildlife c) wetlands clean and recharge water supplies d) wetlands reduce flooding risks 2. a wetland is to a ...
Thursday, March 3, 2016 by Katherine (please check my answers)

Science
Which solution will best allow the movers to achieve their goal? A) Change the width of the ramp from 4 meters to 3 meters. B) Change the length of the ramp from 4 meters to 5 meters. C) Change the height of the ramp from 3 meters to 4 meters. D) Change the length of the ramp...
Thursday, March 3, 2016 by Marc

science !!
1. how do scientists classify stars? by size distance and color by size distance and brightness by color brightness and distance by size brightness and temperature 2. which of The following factors determines how long is Star will live a stars color stars mass the stars ...
Thursday, March 3, 2016 by PLEASE HELP

science
1. The current atomic model would be revised if (1 point) better microscopes were being used to study its structure. better microscopes are invented in the future. new information about an atom’s structure is discovered. a new element is discovered in the future. 2. ...
Thursday, March 3, 2016 by Anonymous

science
if the mass of the earth is 598*10 to the power of 22km and the mass moon is 7.36*10 to the power of 22kg. calculate the difference in their masses, what is the answer in scientific notation
Thursday, March 3, 2016 by Anonymous

maths lit,life science, geography and economics
Which career should I follow with those subjects I don't know what to do
Thursday, March 3, 2016 by Kedibone Evenia masipa

Science.
2. Select 3 terms that belong together. To do this, pick one term from each of the 3 sets. Set 1: intertidal zone, neritic zone, deep zone Set 2: moderate light levels, freshwater, temperature fluctuations Set 3: clams, squid, beavers. A. intertidal zone, temperature ...
Thursday, March 3, 2016 by Help?

Science
1. Which of the following explains why sunlight is important to the aquatic ecosystems? A. Sunlight provides a source of heat and energy to increase water temperatures. B. Sunlight keeps harmful bacteria from taking over aquatic ecosystems. C. Sunlight makes it possible for ...
Thursday, March 3, 2016 by Em

science
A car moves 3 kph. Car B which is 50 m ahead of Car A is moving at 6 kph. If car A accelerates by 5m/s/s, determine if the cars will collide
Wednesday, March 2, 2016 by Hannah

Science
Kilograms divided by Newton?
Wednesday, March 2, 2016 by Anonymous

Science
How do you do kilograms multiplied by Newton?
Wednesday, March 2, 2016 by Anonymous

Science
You are walking on a moving sidewalk (moving at a speed of 2 mph).if you are walking in the same direction as the sidewalk at a speed of 4 mph what is your velocity relative to the ground what would be your velocity if you were walking in the opposite direction as the moving ...
Wednesday, March 2, 2016 by Melissa

Science
Tomorrow I have the midterm (Lab-Earth Science) on 1 Minerals Igneous Rocks Sedimentary Rocks 2 Topographic Maps 3 Geologic Time Help with this, please.
Wednesday, March 2, 2016 by Julius Caesar

science ms.sue or mr.reed plz help me
why does the design of the vacuum flask minimize heat transfer by conduction
Wednesday, March 2, 2016 by ashleydawolfy

Science
Describe how the meteorite collision at the end of the Mesozoic affected the atmosphere and the biosphere.
Wednesday, March 2, 2016 by Breanna L.

science
Can scientists use radiocarbon dating to find the age of a very tall, old redwood tree living in an old growth forest?
Wednesday, March 2, 2016 by Breanna L.

Science
1.)Which of the following are chemical changes? A.)Boiling Of Water B.)Melting A Cube of ice C.)Dissolving 10 grams of salt in water D.)Splitting water into hydrogen and oxygen 2) What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen? (1 ...
Wednesday, March 2, 2016 by #FreeGucci

Science
Describe ozone creation and loss in the ozone layer. Does one occur more than the other?
Wednesday, March 2, 2016 by Sue

physcal science
If the velocity of the car is increased to 45 km/hour, what is its kinetic energy?
Wednesday, March 2, 2016 by jennifer

science
nickel complexes(ethylenediamine) with graph of absorbance vs wavelength
Wednesday, March 2, 2016 by linda

science
A cylinder of length 5cm and uniform cross section area 50.24cm^2 is suspended from a spring balance and totally immersed in water.If the density of the material of the cylinder is 1.25g/m^3. Determine the upthrust on the cylinder. Take g=10m/s^2 density of water=1000kg/m^3
Wednesday, March 2, 2016 by Cyprian

Science
what is the role of malic acid in the reproduction of fern plant
Wednesday, March 2, 2016 by Elsa

science
A 34.0-kg crate is being pushed across a floor. The net horizontal force on the crate is 80.0N. Starting from rest, the crate is pushed over a distance of 4.4m. What is the final speed of the crate?
Tuesday, March 1, 2016 by Edgar

I NEED HELP! Science
What happens when particles of a material move father apart?
Tuesday, March 1, 2016 by Bonny the Horse

Mathematics, geography, agricultural science, life science, English, Life orientation And sepedi
I'm doing grade 11 but still I don't know what or which kind of job careers that needs these subjects Agricultural science, Geography, life science, mathematics (pure), Sepedi, English, And lastly life orientation..Help me please and appreciation will bless you.
Tuesday, March 1, 2016 by tebogo aka sleigh fish

Science
If you began with 36 grams of water how many hydrogen and oxygen can you produce in a decomposition reaction
Tuesday, March 1, 2016 by Sammh

Earth Science
How does altitude affect climate (beyond just temperature)?
Tuesday, March 1, 2016 by Anonymous

Science
A row of elements on a periodic table is called a(n) A: group *** B: Period C: valence D: orbital Is this right?
Tuesday, March 1, 2016 by Jadon

computer science
a memory's addressibility is 64 bits what does tell you about the size of the MAR and MDR?
Tuesday, March 1, 2016 by Jason Young

science
a car reduced it's velocity uniformly from 21m/s to14m/s in 10seconds (A) find the retardation (B) the distance cover in this time
Tuesday, March 1, 2016 by kelvin

History
What is taxonomy? a subgroup of organisms (I also feel like its this one also) the classification of plants based on their medical uses an organisms's evolutionary history the science of classification (my answer)
Tuesday, March 1, 2016 by Litzy

Check My Answers for Science!
1: Which of the following is the minimum level of structure needed to perform the function of waste removal? A: Body System B: Tissue C: Cell*** D: Organ 2: Which two systems work with the muscular system to allow the body to move? A: Digestive and Urinary systems B: Skeletal ...
Tuesday, March 1, 2016 by Andrew G.

Science/Biology
the vessels that contain the largest volume in the vascular system are? I think Arteries
Tuesday, March 1, 2016 by Anonymous

Science
A 20 kg mass slides down an inclined plane which is at an angle of 60 degrees to the horizontal 1. Horizontal component of weight force 2. Vertical component of weight force 3. Angle 4. Normal force 5. Net fx 6. Acceleration along incline I really do not get how to do this, I ...
Tuesday, March 1, 2016 by Alyssa

science
if mass of a body is 8g and volume is 10cm3 what is density
Tuesday, March 1, 2016 by asfa

science (physics)
A copper wire with cross sectional area 0.00030cm^2 is to be used in lifting a 100g object.How fast can the object be accelerated if the wire is to stretch not more than 0.10%? What i know is that first find the elongation & then that will help to find acceleration..
Tuesday, March 1, 2016 by joan

science
Physic. You can walk at the average speed of 2.5 m /s. How long will it take to reach your school 1km away?
Monday, February 29, 2016 by mandeep baral

Science (Physics)
Air becomes a conductor when the electric field strength exceeds 3.00 × 106 N/C. Determine the maximum amount of charge that can be carried by a metal sphere 8.5 m in radius. The value of the Coulomb constant is8.99×109 N·m2/C2. Answer in units of C. I have ...
Monday, February 29, 2016 by Lydia

Science
A. alleles B. mitosis C. DNA D. phenotype E.chromosome F. codominance G. diploid H. meiosis I. incomplete dominance J. centromere K. reproduce L. RNA 8. Chromosome pairs contain different versions of genes, which are called __________________. (1 point) alleles 9. The process ...
Monday, February 29, 2016 by HELP FAST PLEASE

science
Who goes to connections? I would like to get answers to questions from the cyber school that im going to
Monday, February 29, 2016 by LILLYJ

Science
Air pollution can be controlled by? A. permitting more storm runoff B. burning more coal C. eliminating sewage D. putting scrubbers on power plants I think it is B
Monday, February 29, 2016 by Faith Hill

science
if A-B=2C,A+B=4C and C=3i+4j, then what are A and B?
Monday, February 29, 2016 by kagisho

Science/biology
A 62 year old man experiences sudden onset of difficulty breathing, followed by double vision, and later by abnormal kidney and liver function tests. Of the following conditions, which is most likely the cause of his problems? A. Vasculitis​​ B. Raynaud's ...
Monday, February 29, 2016 by Anonymous

Science
1.) when might preserved remains of an entire organism form? A.) when sediment buries the hard part of an organism B.) when an event such as a quick burial or freezing preserves an entire organism ******* C.) when minerals replace parts of an organism D.) when a thin layer ...
Monday, February 29, 2016 by Zach

science
nitrogen and hydrogen combined in the ratio 14:3 by mass to form amonia molecule.find the formula of amonia molecule by calculating the molar mass (atomic mass of nitrogen = 144.4).
Monday, February 29, 2016 by sachin sharma (sharma ji the rockstar)

Science
Lightning is actually van enormous display of the concept of ?
Monday, February 29, 2016 by Keandra

science
Calculate the amount of h2so4 required for preparing 500ml of 2MH2so4 solution.
Monday, February 29, 2016 by vşhął

science
An incident Ray makes 60 degrees angle with the surface of the plane mirror, what is the angle of refraction. Options are...a 60 b 90 c 30 d 0....this is a question in a guide is it correct
Sunday, February 28, 2016 by Melvin

science
Which of the following are psychological characteristics that Beatrice Whiting and John Whiting found to crosscut cultural boundaries
Sunday, February 28, 2016 by May

SCIENCE
jamal's neighbor tells him that there are more bacterial cells than human cells in his body. which of these is the best reason that jamal should question his neighbors statement? a. jamal is older than his neighbor b. jamal does not like his neighbor very much. c. his ...
Sunday, February 28, 2016 by John Doswell

Science Help
jamal's neighbor tells him that there are more bacterial cells than human cells in his body. which of these is the best reason that jamal should question his neighbors statement? a. jamal is older than his neighbor b. jamal does not like his neighbor very much. c. his ...
Sunday, February 28, 2016 by John Doswell

Science /bio
Any foods or fruits highest in glucose?
Sunday, February 28, 2016 by Justin

Science
A coconut of mass 2kg is on a tree of 5m tall; determine the potential energy of this height Take g=10ms^-2.
Sunday, February 28, 2016 by Elvis

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

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