Sunday
September 25, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

science
why tne unit of pd and emf is same
Friday, January 1, 2016 by diwas

science
The work done by 500 calories of heat in isothermal expansion of ideal gas is?
Thursday, December 31, 2015 by priya

Science
The difference between the speed of sound in air at 0 degrees Celsius and the speed of sound in air at 20 degrees Celsius is that A) cooler air molecules move more slowly and respond less readily to the energy of a sound wave B) cooler air molecules move more quickly and ...
Thursday, December 31, 2015 by Need Urgent Help Please

Science
Which type of attractive forces do you expect between HCl3,HF,HCL?
Thursday, December 31, 2015 by Ghufran ali

science and technology
calculate the work done if a force of 80N is applied to a ball to move it to a distance of 24m.
Thursday, December 31, 2015 by yakubu shehu

Science - Chemistry
If vapour pressure of water is 17.5 torr at 20C, what is the water vapour pressure inside a bottle of 100 proof whiskey? 100 proof = 50% ethanol Total volume = 1 L Mass of ethanol = 394.5g Mass of water = 500g Density of ethanol = 0.789g/mL Moles of ethanol = 8.58 mol Moles of...
Wednesday, December 30, 2015 by Sara

science,physics
Jesse Rose walks along a footpath for 6 minutes.She then cuts across a field, which takes a further 4 minutes.She walks a total distance of 900m. what is her average speed? could you please explain this step by step.
Wednesday, December 30, 2015 by ANGELINA JONES

science,physics
i do not understand this question and by the way this is not my homework. Reggie sets out from home on his bicycle.First he goes to the shop, which is 500 m away, he then rides to his friend's house which is a further 1200m.He then returns home. what total distance has ...
Wednesday, December 30, 2015 by sara

Science
How are modern items made to look like ancient artifacts? (This is about radioactive decay and dating.)
Wednesday, December 30, 2015 by Anonymous

Science
What types of artifacts can accelerator mass spectrometry be used to date, other than wood, paper, and bread?
Wednesday, December 30, 2015 by Anonymous

Science
A train starts from rest with an accelaration of 0.5 m/s (square) find its speed in km/h when it has moved throug 100m
Tuesday, December 29, 2015 by Farid

Math/Science
Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 260 miles and a perigee of 220 miles above the surface of Earth.
Tuesday, December 29, 2015 by Lane

Chemistry
An experiment calls for 100ml of 0.1M copper(II) sulfate solution. Write a step-by-step procedure for a science teacher to make 100ml of 5M stock solution and the required diluted solution.
Tuesday, December 29, 2015 by Esther

Computer science
Score 1,Score 2 and Score 3 are the marks scored by a student in three tests. Write a pseudocode,an algorithm and draw the flowchart to find the average of best two scores.
Tuesday, December 29, 2015 by Bettlyn

science
what is computer?
Tuesday, December 29, 2015 by beshwar mandal

science
Your bedroom gets direct sunlight through a window during the hottest times of the day. You ask your mom to turn down the thermostat in the house so your room can cool dow. Instead, your mom suggests that you put aluminum foil over the window. What will the results be if you ...
Monday, December 28, 2015 by ?

Science
Which of the following is an example of heat transfer by radiation? A. Wind currents B. a pot of water boiling on the stove C. a bare foot on a hot sidewalk D. a microwave oven heating food I think B? Not sure?
Monday, December 28, 2015 by Amber

Science
Which of the following correctcly identifies the methods of heat transfer?
Monday, December 28, 2015 by ?

life orientiaton,history,geography,life science
What careers can I do with this subjects
Monday, December 28, 2015 by sibusiso

science
an organisms particular role in its habitat or when and how it survives is called what?
Sunday, December 27, 2015 by kahla

science
A uniform solid sphere is placed on a smooth horizontal surface and a horizontal force F is applied on it at a distance h above the surface. The acceleration of the center?
Sunday, December 27, 2015 by harry

ndzundza mabhoko secondary school
Hi I'm doing geograph, maths literacy, life science and business which career can I go for
Saturday, December 26, 2015 by hope

Science
How can volcanic eruptions change the surface of the earth? by creating large deposits of coal by creating new islands and land by lowering land levels several feet by decreasing the level of the ocean I think its C
Saturday, December 26, 2015 by Courtney

science
A body of mass m=2.6 kg is standing on a ramp inclined in an angle of α=14.9 degrees. The static friction coefficient between the ramp and the body is μ=0.29. The ramp, which is inclined to the left, is in a train, which accelerates to the right. What is the minimal ...
Saturday, December 26, 2015 by Anonymous

science
A body of mass m=2.6 kg is standing on a ramp inclined in an angle of α=14.9 degrees. The static friction coefficient between the ramp and the body is μ=0.29. The ramp, which is inclined to the left, is in a train, which accelerates to the right. What is the minimal ...
Saturday, December 26, 2015 by chen

g the following subjects, life science,business st
Which courses can I consider at varsity
Thursday, December 24, 2015 by Bontle

Science Fair Project
Is this Science Fair Project that I am doing a 9th or 11th grade project.... Up,Up, and Away in your own Hot-air ballon !Search up this Project and then tell me!
Wednesday, December 23, 2015 by Zarmin

science help
Which of the following types of waves has the least amount of energy? Gamma rays Microwaves Radio waves Rays is it c
Tuesday, December 22, 2015 by Oscar

science help PLS
Which of the following describes the type of wave that transmits sound? Disturbance Longitudinal Propagated Transverse is it c
Tuesday, December 22, 2015 by Oscar

SCIENCE
How does temperature change during a chemical reaction. (Note: it has to be a Endothermic and exothermic reactions) Thanks
Tuesday, December 22, 2015 by DEEZ GOT HEE

Science
a 60.0 N circus performer performs a high wire act 5.m above ground. About how much gravitational potential energy does the performer have? A.12.0j B.56.0j C.62.0j D.300.0j I think D but idk
Tuesday, December 22, 2015 by That Girl

Science
Two forces of resultant 100N are perpendicular to each other. If one of them makes angle 60 degree with the resultant. Calculate the magnitude of forces
Tuesday, December 22, 2015 by Adeniyi

science
A student mixed 1.5g of CaO with 2.5M HNO3. How many moles of CaO were reacted
Tuesday, December 22, 2015 by Sue

science help
Which of the following is considered a drawback to using wind energy as a source of power? Wind energy is highly polluting. Wind energy is nonrenewable. Winds do not always blow consistently. Winds produce lesser quality energy than other sources. is it c
Monday, December 21, 2015 by Oscar

science help
During which step in the Can Crush Lab did the air pressure outside the can become greater than the pressure inside the can? The can was filled nearly to the top with water. The can was placed on the hot stove burner for several minutes. The can was removed from the hot oven ...
Monday, December 21, 2015 by Oscar

science help
What is the relationship between atmospheric pressure and the density of gas particles in an area of decreasing pressure? As air pressure in an area decreases, the density of the gas particles in that area decreases. As air pressure in an area decreases, the density of the gas...
Monday, December 21, 2015 by Oscar

Science Ms.Sue
Which phase in mitosis or meiosis are these 1.Chromosomes pair up and can exchange genetic material 2.The nuclear membrane in the daughter cells breaks down 3.The chromosomes line up along the center of the cell and two spindle fibers, one from each end of the cell, attach to ...
Monday, December 21, 2015 by Charlie Shuler

SCIENCE PHYSICS
WHEN a body hanging from a spring balance is immersed in water it floats just below the surface of water and shows 100 g loss in its weight then what is the weight of the body in water,in air,what is upthrust on the body what is the volume of tne body.
Sunday, December 20, 2015 by Junaid Shaikh

dzwaboni sec school and am doing this subject(math literacy, history, geography,life science, life orientation, English and tshivenda
Am in grade 10 and I do maths literacy.so what percentage should I get in maths literacy to do law degree?
Sunday, December 20, 2015 by thembuluwo

science help PLS
What is the relationship between atmospheric pressure and the density of gas particles in an area of decreasing pressure? As air pressure in an area decreases, the density of the gas particles in that area decreases. As air pressure in an area decreases, the density of the gas...
Saturday, December 19, 2015 by Oscar

Science
What would happen to ocean tides on Earth if Earth stopped rotating?
Friday, December 18, 2015 by Josh

Social Studies
which statement best describes the thinking of the enlightenment? A. the power of reason is more important B. scientific ideas must fit religious beliefs C. only god knows how the world works D. faith is more important than science is it A?
Friday, December 18, 2015 by AlmostStolen

Science chemistry
a steel cylinder of oxygen with a volume of 15 L was available for medical purposes. The cylinder pressure decrease from 40.6 to 38.5 atm during which time the temperature remain at 24.0 °C how many moles of oxygen had been removed
Friday, December 18, 2015 by Hiba

Science
a steel cylinder of oxygen with a volume of 15 L was available for medical purposes. The cylinder pressure decrease from 40.6 to 38.5 atm during which time the temperature remain at 24.0 °C how many moles of oxygen had been removed
Friday, December 18, 2015 by Hiba

science
calculate the possibility that mother being a carrier of hemophilia with B blood group and healthy father with AB blood group can have an affected son with A blood group. give proper genotypes and crosses
Friday, December 18, 2015 by mustafa

science
what are three of the populations in an ecosystem near you
Thursday, December 17, 2015 by Billy

science help
Which of the following is something you should do after severe weather occurs? clean up flood waters keep away from windows create a family safety plan invite friends over to see the damages is it c
Thursday, December 17, 2015 by Oscar

1 Science Question Unanswered
Okay... I got all the answers. Thanks for the helps anyways. :( I just at least need one help. 1. In plants, sexual reproduction occurs when sperm and egg unite to form a... a. gamete b. gametophyte c. sporophyte d. zygote Is it a or d?
Thursday, December 17, 2015 by Ellen

Science
1. In plants, sexual reproduction occurs when sperm and egg unite to form a... a. gamete b. gametophyte c. sporophyte d. zygote Is it d? 2. A plant continues to grow throughout its life through the use of s a process called... a. alternation of generations b. photosynthesis c...
Thursday, December 17, 2015 by Ellen

Science
1. In plants, sexual reproduction occurs when sperm and egg unite to form a... a. gamete b. gametophyte c. sporophyte d. zygote Is it d? 2. A plant continues to grow throughout its life through the use of s a process called... a. alternation of generations b. photosynthesis c...
Thursday, December 17, 2015 by Ellen

Science
I really need help! Can someone tell me if my answer is correct? Question; Explain the difference between carbon-14 reading for the human skull and brown rock. Why is there such a difference? What does this tell you about dating extremely old objects? My answer; The carbon ...
Thursday, December 17, 2015 by Sage

physical science
Carla applied a force of 35 n to a wheelbarrow full of bricks and moved it 2.5 m.which of the following can be determined from this information ?
Thursday, December 17, 2015 by help

science
to lift a load to the roof you apply 21 n of force to a pulley . the puley applies 21 n of force to the load what is the mechanicalo advantage of the pulley ?
Thursday, December 17, 2015 by help

science
A ball is dropped from a height of 10 meter.If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back?
Thursday, December 17, 2015 by Reem

Comm Tech
1.)Marla remembers her tuesday class schedule by using the acronym Mest . Which of the following might be her class schedule? A.)Math,Social Studies, English,Technology B.)Math,English, Social Studies,Science, Technology C.)Math,English,Social Studies,Technology D.)Math,Social...
Thursday, December 17, 2015 by YRN DJ

Science
istance of a planet from sun is four times the distance of the planet frpm earth.How many years will the planet take to complete one revolution of sun?
Thursday, December 17, 2015 by Nikhil

science
Suppose the height of the net is 0.800 m , and the court's border is 11.2 m from the bottom of the net. Use g =10 m/s2 and find the maximum speed of the horizontally moving ball clearing the net..
Wednesday, December 16, 2015 by sarah

science
pH of HCl solution is 2. Calculate the pH if this solution was diluted twice
Wednesday, December 16, 2015 by mustafa

Science
How to calcualte the enthalpy change for the process in which 6.00g of steam at 100C is coverted to liquid water at a temperature of 35.0?
Wednesday, December 16, 2015 by Bethany

Science
Which is a good experiment that shows light changes when it enters a new medium?
Wednesday, December 16, 2015 by FirstNameLastName

science help PLS
An astronomer sees two stars in the sky. Both stars are equally far from Earth, but the first star is brighter than the second star. Which of the following is a valid conclusion about the first star? It is larger than the second star. It is smaller than the second star. It is ...
Wednesday, December 16, 2015 by Oscar

science help PLS
Which of the following is a massive star that has reached the end of its stellar evolution? Neutron star Red giant Stellar nebula White dwarf
Wednesday, December 16, 2015 by Oscar

science
vs =6 volts vth =2 volts ida(diode current)=1m amp no value given for resistor network find rth(thevenien) 2,000 and 4000 do not work. diode current must not be equal to isc.?? voc=2 volts
Wednesday, December 16, 2015 by bear

science
21. In the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the ______________. 22. The joints highlighted in the image below are ______________ joints. image of transparent body with the spine highlighted
Wednesday, December 16, 2015 by 2015

science
which describes a use of a renewable source? Mining copper Burning coal Car filled with gasoline Building a wooden furniture
Wednesday, December 16, 2015 by AshleyRene

physical science
A car travels at a constant speed around a circular track whose radius is 3.5 km.The car goes once around the track in 400 s.What is the magnitude of the centripetal acceleration of the car?
Wednesday, December 16, 2015 by nalim

science
Resistivity dependent on length and area or not
Wednesday, December 16, 2015 by sanjay

science
Rheostat varies what 1. Current 2. Resistance 3 . voltage
Wednesday, December 16, 2015 by sanjay

Science
What's the difference between ambient temperature and body temperature?
Wednesday, December 16, 2015 by Mel

science help PLS
Which of the following correctly describes a way in which Earth’s atmosphere interacts with the geosphere? It contains gases that living organisms breathe. It contains gases that trap incoming solar radiation. It provides a medium for cycles that provide nutrients to ...
Tuesday, December 15, 2015 by Oscar

Science
Describe circular motion. Which of Newton's laws helped you describe circular motion Plz I need help fast, thx!!
Tuesday, December 15, 2015 by Zach

science help
What is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? As air pressure in an area increases, the density of the gas particles in that area decreases. As air pressure in an area increases, the density of the gas...
Tuesday, December 15, 2015 by Oscar

physical science
If a runner's power is 400 W as she runs, how much chemical energy does she convert into other forms in 10 minutes? (You will need to rearrange the Power Equation.)
Tuesday, December 15, 2015 by hollywood

Language Arts
Hi guys, can someone help me with three questions? 1. Which word best completes the sentence? I am going to ___ my chemistry teacher to learn more about careers in science. a. investigate b. discover c. interview d. evaluate Is it d or c? Or neither? 2. Which of the following ...
Tuesday, December 15, 2015 by Samantha

science
14.If a forest ecosystem is removed through clear-cutting, many species of organisms that lived in that ecosystem disappear. Their loss is due to ________________________. 15.When fossil fuels are burned, they produce ________________, the main greenhouse gas responsible for ...
Tuesday, December 15, 2015 by shynice

science
Calculate the PH of the 0.4g of NaoH in water to give 200ml of solution
Tuesday, December 15, 2015 by praful

Science
What can scientists learn from the rate at which radioactive elements decay? A. a rock's absolute age* B. the relative age of rock layers C. where one soil horizon ends and the next begins D. the difference between molds and casts. The relative age of a rock is A, its age ...
Tuesday, December 15, 2015 by Brittany P.

Language Arts
Hi guys, can someone help me with three questions? 1. Which word best completes the sentence? I am going to ___ my chemistry teacher to learn more about careers in science. a. investigate b. discover c. interview d. evaluate 2. Which of the following sentences contains an ...
Tuesday, December 15, 2015 by Samantha

Science
Is photosynthesis a endothermic reaction
Monday, December 14, 2015 by Anonymous

Science
Earths forces
Monday, December 14, 2015 by Anonymous

science
in addition to body structure and development, which of the following is used to classify animals? Speed, color, DNA or location
Monday, December 14, 2015 by bob

Phyical Science
What technology is involved in gathering or using natural gas? How do we use natural gas to generate electricity?
Monday, December 14, 2015 by linda

Science
I need help with one question: 1.) Which of the following is a behavior that is cyclic? (Definition of cyclic: occurring in cycles; regularly repeated) Running from predators Searching for water Hunting at Night Migrating for Warmth (Hunting at night is only something that ...
Monday, December 14, 2015 by Anonymous

Phyical Science
how do we use natural gas to generate electricity?
Monday, December 14, 2015 by linda

Phyical Science
Which is more expensive to create wind power or natural gas?
Monday, December 14, 2015 by Student

Science
You do 100 J of work in pulling out a nail with a claw hammer. If the hammer does 70 J of work, what is the hammer's efficiency?
Monday, December 14, 2015 by Sooo

Science
What are some renewable energy sources? Also what is a renewable energy source that produces cool air?
Monday, December 14, 2015 by Twenty One Pilots

Science HELP PLZ
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse* a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can...
Monday, December 14, 2015 by Layla

Science
heartworm is a type of worm that enters a dogs body through a mosquito bite. it produces offspring that lodge in a dogs arteries and food off of surrounding cells. which type of relationship is this a. mutualism b. predation*** c. commensalism d. parasitism
Monday, December 14, 2015 by Sid.V

Science
Which of the following is most likely an example of a predator adaptation. a. warning coloration b.keen eyesight c.thick body armor d.spines
Monday, December 14, 2015 by Sid.V

Geography History Life science English Xhosa Lifeo
If I'm doing History can I be able to study nursing
Monday, December 14, 2015 by Noxolo Malangabi

Science
If a piece of paraffin wax has a mass of 900g and density of 9g/cm3, if the wax was melted to the liquid state approximately what would its volume be?? HELP PLEASE!!!
Sunday, December 13, 2015 by Denis

science
Tow masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass compare to the other?
Sunday, December 13, 2015 by james

science
If the temperature of 0.20 kg of gold, which has a specific heat of 130 J/kg • °C, increases by 25°C, how much energy has been transferred to the gold by heat?
Sunday, December 13, 2015 by Nana

science
find the distance covered when speed is 960 km/hr and time is 1hr 50min.
Sunday, December 13, 2015 by maha

science
For which value of angle is the range of a projectile fired from ground level a maximum?
Saturday, December 12, 2015 by Eh

Adv. Func./Science Question
Hi, I have this question that I will be tested on but my teacher didn't teach us how to do it so I am confused on how to even start. Please explain on how to start the question...thank you How bright a star appears can depend on how much light the star actually emits and ...
Saturday, December 12, 2015 by Vivian

science
which of the following is the function of live
Friday, December 11, 2015 by betty

science + check over
please check my answers + help me improve them. * 1.) explain why earth & other planets were not solid when they formed during the beginning of the precambrian, approximately 4,600 million years ago + what was this particular time period called & why is this time period not ...
Friday, December 11, 2015 by abx +

science
A cattleman has installed a new electric fence. The cows keep escaping because they are not deterred by the low power they experience when touching the fence. There are two dials on his controls. Would you tell him to change the amperage or voltage? Support your answer with ...
Friday, December 11, 2015 by JENE

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