Thursday
February 23, 2017

Homework Help: Science

Branches of Science

Recent Science Questions

Science
What will be the mass of water if 5gms of hydrogen and 8gms of oxygen react with each other?
Wednesday, January 25, 2017 by Shristy

CHECK answers science
my answer has the **** 1. What is the smallest part of all matter called? (1 point) * a. Element b. Atom***** c. Molecule d. Compound 2. Which of the subatomic particles is negative? (1 point) a. Nucleus b. Neutron c. Proton d. Electron*** 3. Who provided the first evidence ...
Wednesday, January 25, 2017 by Anonymous

Science
The fruit of an oak tree is called an acorn. You observe a squirrel gathering and burying acorns. Several months later, you observe an oak seedling growing in the area where the squirrel buried an acorn. What conclusion can you draw about oak tree reproduction from your ...
Tuesday, January 24, 2017 by Help I need somebody not just anybody

physical science
How much heat is absorbed by a 30g iron skillet when its temperature rises from 24oC to 93oC? Joules do i addition everything?
Tuesday, January 24, 2017 by jake

Science
A football player makes a tackle to stop a touchdown.What will happen to the offensive player?What law of motion applies and why?
Tuesday, January 24, 2017 by Emily

Science
A car is moving down a straight road.Suddenly a cat jumps in front of the car.The driver slams on the breaks and the passenger goes flying forwards.Why?What law of Newton applies to this situation?
Tuesday, January 24, 2017 by Emily

science
what is the relationship between mass and gravitational potential energy?
Tuesday, January 24, 2017 by please help im confused

integrated science
Two individuals on roller blades push off each other.One weighs 45 kg and the other weighs 40 kg.who will travel further and why.Is the force balanced or unbalanced
Tuesday, January 24, 2017 by emily

science
A weight of 10N is supported by 2 strings AB and AC tied to a horizontal support.The strings makes an angle of 30 degree and 60 degree inclined respectively to the horizontal support.calculate the tention T1 and T2 in the strings
Tuesday, January 24, 2017 by fuseini

Check my answers, Physical science
my answer has the **** 1. What is the smallest part of all matter called? (1 point) * a. Element b. Atom***** c. Molecule d. Compound 2. Which of the subatomic particles is negative? (1 point) a. Nucleus b. Neutron c. Proton d. Electron*** 3. Who provided the first evidence ...
Tuesday, January 24, 2017 by Anonymous

Physical Science
Rank from largest to smallest atomic radius. To rank items as equivalent, overlap them. O, S, Se, Po, Te
Tuesday, January 24, 2017 by Hannah

maths .social science .technology.english
A train travelling at anaverage speed of 100km/h covers a certain distance in 3 h 36 minutes .at what avarage speed must the train travel to cover the same distance in 2h 30 minutes
Tuesday, January 24, 2017 by lindo

science
How a comet changes when when it comes close to the sun? It explodes***
Tuesday, January 24, 2017 by Jayda

Science
Find the work done when a 25kg weight is lifted to a vertical height of 2.0m from ground ...
Tuesday, January 24, 2017 by Hema

Science
If an Iron block had a length of 2 cm, and a width of 3 cm and a height of 1 cm and a mass of 33 g between what two liquids would it float?
Tuesday, January 24, 2017 by Tywan

Science
Provide 3 statements that demonstrate the importance of units when describing motion. I don't fully understand the question, can someone please explain it to me a little more?
Tuesday, January 24, 2017 by Reeces

Science
Suppose you find fossils of clams in rock high on a mountain. what can you infer about the mountain?
Monday, January 23, 2017 by Jesse

Science
Relate to some objects your nose is in motion when you run. Relate to others it is not motion. Give one example of each
Monday, January 23, 2017 by Alex

Science
Suppose that you are a Walking down the street describe the forces acting on you and use Newton's laws of motion to describe your motion
Monday, January 23, 2017 by Jermya

Science
Electric circuit with three cells each of emf 2v and negligible internal resistances are connected in series with an ammeter two resistors of resistance 2 and 6 and a key. 1. Draw a diagram for the above information 2.calculate the current in the circuit when the key is closed
Monday, January 23, 2017 by Fred

science
near point of an eye is 50 cm and far point is 4 m . Which lenses should be use t read as well as see movie clearly?
Monday, January 23, 2017 by anjali

Science Computers!
Computers use energy and respond to certain stimuli, such as commands from the user. Why, then, are computers not considered living things? PLZ Answer This Scientifically and Not Obviously.
Monday, January 23, 2017 by Agala

Science
1. One potential problem with genetic engineering? 2. I can genetic engineering never solve all of mans problems? 3. What are two biblical principles that must be considered when making decisions about human genetic engineering? Very much appreciated!
Monday, January 23, 2017 by Jie

physical science
Two forces of 60N and 80N act a point .sketch a tail to head diagram and determine their resultant
Monday, January 23, 2017 by Kesedi

Science
A picometer (pm) is equal to 1 x 10^-12 m. The O-H bond lengths in water are 95.8 pm,while S-H bond lengths in dihydrogen sulfide are 135 pm. Why are S-H bonds longer than O-H bonds? Is it because Sulfurs mass is greater than Oxygens mass? Please correct me if I'm wrong. ...
Monday, January 23, 2017 by :)

life science
why dna is able to play a role in the transmission of hereditary information
Monday, January 23, 2017 by gracious mametsa

Science grade 7
Please help. Why is I beam the most popular beam?
Sunday, January 22, 2017 by A student

Science
Consider the following reaction, 4 PH3(g) + 8 O2(g) → P4O10(s) + 6 H2O(g) If a container were to have 32 molecules of PH3 and 32 molecules of O2 initially, how many total molecules (reactants plus products) would be present in the container after this reaction goes to ...
Sunday, January 22, 2017 by Miguel Plaza

science
I need to make a acrostic poem of prokaryote.
Sunday, January 22, 2017 by vincint

science (physic)
An expansible ballon filled with air floats on the surface of a lake with 2/3 of its volume submerged .How deep must it be sunk in the water so that it is just inequilibrium neither sinking further nor rising? It is assumed that the temperature of the water is constant and ...
Sunday, January 22, 2017 by Aryan

science
A bullet of mass 40g strikes a stationary wooden block of mass 6kg horizontally at 500m/s the bullet goes through the block,and emerges from from the other side at 200m/s.calculate the velocity of the block once the bullet emerges from it
Sunday, January 22, 2017 by Lesedi

Science
Suppose some natural disaster iccured and a dpecies of finch is forced to relocate from its original island where it dined on cactus flowers to an adjacent island with fewer cacti but iverabundance if orchids. What would be the immediate consequences to the soecies in the ...
Sunday, January 22, 2017 by Anonymous

Science
What Is Enzymes
Sunday, January 22, 2017 by ABEL

science grade 11
Two people, one of mass 51.4KG and the other mass of 78.0 KG, sit a distance between of 2.3 metres apart on a low friction sleds with the same friction coefficients. A)what is the strength of the gravitational force between them? B) suppose the friction is slowly reduced until...
Saturday, January 21, 2017 by Sohaib

science grade 11
A waiter carries a 253g drink a distance of 12m on a horizontal tray at constant speed of 1.1 m/s. A) what work is done by the normal force of the tray on the drink? B) what work is done by the friction force of the tray on the drink?
Saturday, January 21, 2017 by Sohaib

science
Youre travelling down the road in a car with a total mass(including passengers) of 2.24 X 10^3 a)What is the change in kinetic energy of the car if you slow down from 80km/h to 70km/h(reducing your speed by 10km/h) B)what is the change in kinetic energy of the car if you slow ...
Saturday, January 21, 2017 by Francis

children's literature
Aesthetic development increases a person’s appreciation of: A. beauty and numbers. B. art and numbers. C. beauty and art. D. beauty and science. D?
Saturday, January 21, 2017 by bev

science
A certain echocardiogram uses ultrasounds with a frequency f = 6.1130 MHz. The speed of sound in blood is 1570 m/s. The patient is aligned so that blood is flowing through the heart directly towards the transducer (the transducer produces and detects the ultrasound waves). If ...
Saturday, January 21, 2017 by kanny

science
why are models important?
Saturday, January 21, 2017 by Maya

science chemistry
Explain how Particles moves in solid lead,molten solid,gaseous lead in these three state of matter
Saturday, January 21, 2017 by salman

science
The velocity of sound in air at 27°celcius is 340m/s calculate the velocity of sound in air at 227°celcius ?
Saturday, January 21, 2017 by karan

physical science
in a tug of war the left team pulls with a force of 300N and the right team pulls with a force of 150N. what is the resultant force?
Friday, January 20, 2017 by jennifer

science
A stone is dropped from a height 80m calculate k.e and p.e at ts t 2 s
Friday, January 20, 2017 by mora

Science
why can't a model of the solar system be proportionate in distance b/w the planets and size of the planets? I think that a scale model that is proportionate could include both
Thursday, January 19, 2017 by Lori

Science
Consider a wetland ecosystem similar to the one shown in the image below. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor. Suppose that the local ...
Thursday, January 19, 2017 by Help I need somebody not just anybody

Science
.Fertilizers and pesticides applied to farm fields in Pennsylvania have made their way down into the Chesapeake Bay in Maryland. This is an example of _________________ pollution. Ms.Sue
Thursday, January 19, 2017 by Help I need somebody not just anybody

Science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support.
Thursday, January 19, 2017 by Help I need somebody not just anybody

Forensic Science
What drug is the greatest challenge for Forensic Science?
Thursday, January 19, 2017 by Ari

science (ASAP)
identify the terms or phrases that are paired together correctly a. deserts and dwarf trees b. temperate and deciduous forest and evergreen trees c. subarctic taiga and moss d. tundra and permafrost ***
Thursday, January 19, 2017 by Miranda

Science
Other than moisture what are the three major components of the air you breathe
Thursday, January 19, 2017 by Anonymous

science
how many atoms are in 10.0 grams of sulfur?
Thursday, January 19, 2017 by maddy avery

Science
Which of these statements are true? A. There is more water on Earth now than there was millions of years ago. B. There is less water on the Earth than there was millions of years ago.(MY ANSWER) C. There is no way to tell how much water there was on Earth millions of years ago...
Thursday, January 19, 2017 by Millicent

science
Three dogs—Ed, Max, and Marcie—are pulling a dogsled along a patch of ice. Ed pulls with a force of 115 N; Max pulls with a force of 62 N; and Marcie pulls with a force of 90 N. If there are no forces pulling the sled backward, what is the net force acting on the sled?
Thursday, January 19, 2017 by breyana

Science
This is for 7th grade science and I think this was good tell me if I'm wrong Like climate, change to an environment will affect the ones living in it. Plants that are moribund in an area where they grow changes in the environment will help the plants thrive because they change...
Thursday, January 19, 2017 by Hallee

science
I need a acrostic poem on photosynthesis
Thursday, January 19, 2017 by deez

Science
A pebble is dropped into a graduated cylinder with 20ml of water in it. After the pebble is dropped in, it sinks and the water level rises to 25ml. What is the volume of the pebble? (Numbers and Units!) I did 25ml - 20ml but the answer had to be something about density.
Thursday, January 19, 2017 by Haider

Science
Why isn't there any evidence of black holes? Or any pictures of black holes, there are always computerised pictures
Thursday, January 19, 2017 by Shawne

Science
a 30 gm bullet is fired from a gun of mass 2kg with a speed of 800m/s. Find the magnitude and direction of the velocity of gun
Thursday, January 19, 2017 by Anonymous

science
Calculate the work done in each of the following situations. (a) A horse pulls a wagon with a force of 1200 N and moves it 15 m. (b) A cable lifts an elevator 16 m by using a cable with a tension force of 2500 N. -How much work is required to lift a 35-kg object from the ...
Wednesday, January 18, 2017 by james

Physical science
Explain whether the size of an object’s displacement could be greater than the distance the object travels.
Wednesday, January 18, 2017 by Taylor

science
what are examples of a biomass fuel A.oil B. natural gas C.wood D. coal
Wednesday, January 18, 2017 by <kyky

Physical Science.
I need help answering this inferring question because I don't fully understand it. Q: Infer whether the size of an object's displacement could be greater than the distance the object travels.
Wednesday, January 18, 2017 by Kristen

Maths, Accounting, Life Orientation, Life Science, Physical Science, English and my home language (sepedi)
Could I become a social worker with those subjects?
Wednesday, January 18, 2017 by Pamela Mosoane

science
Distillation and evaporation are methods to ______.
Wednesday, January 18, 2017 by anonymous

Science
What is the Largest Valve coming from the heart? Please help?? I think it either veins or the Aorta, but I'm not positive.
Wednesday, January 18, 2017 by Anonymos

science
use the terms atome and element to xplane what makes silver and gold different
Wednesday, January 18, 2017 by mohammad

science
why ac current has variable frequency and voltage? I din't understand about hertz. please make me clear about it?
Wednesday, January 18, 2017 by rabin

social science
the need to preserve and protect the Khajuraho temple
Wednesday, January 18, 2017 by harini

science
A train which is moving with uniform acceleration is observed to take 20 to 30 seconds to travel successive 0.4km.how much far then willing travel before coming to rest, if the acceleration remains uniform?
Wednesday, January 18, 2017 by ravi

physics
In a science fiction novel two enemies, Bonzo and Ender, are fighting in outer spce. From stationary positions, they push against each other. Bonzo flies off with a velocity of +1.7 m/s, while Ender recoils with a velocity of -3.3 m/s. Determine the ratio mBonzo/mEnder of ...
Tuesday, January 17, 2017 by Tyler

Science
What is the function that makes hair stand up
Tuesday, January 17, 2017 by Anonymous

Biology
I have a question on plant science, wondering where I can get the answer..
Tuesday, January 17, 2017 by Jeff

Science
28cm3 of a gas weighs 0.4g at STP.Calculate the molecular mass of the gas.
Tuesday, January 17, 2017 by David

science(physics)
Why a minibus is more likely to topple over when the roof rack is heavily loaded than when the roof rack is empty?
Tuesday, January 17, 2017 by annie

science
what should soil have to suit animals which live in soil?why are these things important?hence, infer which type of soil is most suitable for soil living-things ?
Tuesday, January 17, 2017 by hermoine granger

science
A(n) 0.463 kg soccer ball approaches a player horizontally with a speed of 24.4 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 16.2 m/s. What is the magnitude of the impulse delivered to the ball by the ...
Monday, January 16, 2017 by Ian

Science
If T represents the allele for tall pea plants and t represents the allele for short pea plants, what is the phenotype of each parent and of the offspring?
Monday, January 16, 2017 by John Cena

Science
What are some ideas for experiments on a dripping faucet?
Monday, January 16, 2017 by Anonymous

Science
Female mouse has black fur(homozygous) ,male has white fur(homozygous). State their offspring’s fur color.(black color is dominant, white is recessive)
Monday, January 16, 2017 by Amina

science
need help with 3 questions: 1.fossil fuels are a. a natural resource b. renewable c.made from minerals d.burned in hydroelectric plants. 2.which of the following is a renewable for of energy? i didn't have any suggestions :(
Sunday, January 15, 2017 by ieke

Science
A concave lens has a focal length 10cm.An object of height 2.5cm is kept at a distance of30cm from the lens .Determine the position of image & its size
Sunday, January 15, 2017 by Sudarshana Das

Chemistry
If we were to fill a bottle with boiling hot water than place it in a bucket filled with cold water what would happen to the bottle and why? i know the bottle would get crushed inwards but whats the science behind this can someone explain?
Sunday, January 15, 2017 by Chem

science
which gas change the gens of the human
Sunday, January 15, 2017 by rajeevkumar

science
how can I convert 1% w/v to g/ml
Sunday, January 15, 2017 by homework

science
Numerical problem : The dimensions of a certain water tank are 8m x 6m x 4m. What is the pressure at the bottom of the tank, if the tank is half filled?
Sunday, January 15, 2017 by angel

science
concentration of[H+]ion in0.08M Ca(OH)2
Sunday, January 15, 2017 by ruma

math,science, geography
What are three characteristics that mid-latitude cyclones have in with all cyclones?
Sunday, January 15, 2017 by Lindelani

Physics, Science
How would the length of a day be affected if all the world’s inhabitants continuously walked in an easterly direction? When they stopped walking?
Sunday, January 15, 2017 by Ege Kaan Gürkan

science
which of the following would decrease the human ecological footprint? 1) using bottled water instead of tap water 2) using public transportation instead of riding in a car 3) buying books instead of borrowing from the library 4) using hot water instead of cold to wash clothing...
Sunday, January 15, 2017 by sf

Lesson 9: Energy and the Environment Unit Test
Science 6 A Unit 3: Energy and the Environment test I need help on it all
Saturday, January 14, 2017 by sf

Science, pls help Ms. Sue!!!!!!!
an electric current is passed through water in the process of electrolysis two gases are formed one has a boiling point of -183 C and the other one has a boiling point of -253 has a chemical or physical change ocured
Saturday, January 14, 2017 by Kimzy

Science
How many moles of carbon dioxide could be produced from 220 g of C2H2 and 545 g of O2?
Saturday, January 14, 2017 by Shella mae

Arithmetic progression
In a class test some of the answers obtained by Neha in mathematics and science is 28 had she got 3 more in maths is 4 marks class in Science the product of marks in obtained in 2 subjects would have been 180. find the marks obtained is 2 subjects separately. if you found your...
Saturday, January 14, 2017 by Smeta

Science
Has anyone took the Structures and Properties test for 8th grade. I'm a student at connections and I need help.
Friday, January 13, 2017 by Anonymous

maths and science and geography
I describe inorganic as non-living things and organic as the living things. so help me to difference it?
Friday, January 13, 2017 by treasure mokatsa

science
what is meant by vegetative propagation by stem?
Friday, January 13, 2017 by vani

science
who does vegetative propagation by stem occur. CAN YOU PLEASE TELL ME I'LL BE VERY THANKFUL !!
Friday, January 13, 2017 by vani

Science
Fat reacting with sodium hydroxide Is this a chemical or physical change My answer is chemical is this right answer Chemical A originally is buoyant in water; after it mixed with HCI, the new substance now sinks in water. My answer is physical change. Is this right?
Thursday, January 12, 2017 by PLEASE CHECK MY ANSWER!!!!!!

Physical Science
A step-up transformer has primary coil with 15 turns. How many turns would be required in the secondary coil to increase the voltage from 60 v to 160 v? 15 x=160/80 x=80/15 x=?
Thursday, January 12, 2017 by SAM

Science
What is the kinetic energy of a soccer ball which has a mass of 4 kg and is kicked at a velocity of 10 m/s?
Thursday, January 12, 2017 by Anonymous

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