Saturday
February 25, 2017

Homework Help: Science

Branches of Science

Recent Science Questions

Science
Four students dissolved 30g of salt in a 200ml solution of water.Each student heated his or her water solution to a different temperature ( Marcus had 10 and tyra had 25 Luis had 50 and Andrew had 75) which student most likely had the solution with the fastest dissolving rate ...
Tuesday, November 8, 2016 by Kate

Science
2Na(s) + 2H2O(aq) = 2NaOH (aq) + H2 (g) Is this reaction exothermic or endothermic? I don't understand ,
Tuesday, November 8, 2016 by Briaah

Physical Science
How much Cerium sulfate is needed to make a saturated solution in 100mL of water at 30 degrees Celsius?
Tuesday, November 8, 2016 by Mal

Science
•Explain the process of succession •Describe how changes in an ecosystem can affect organisms that live there •Describe the amount of time needed for ecosystem recovery What are the dependent and independent variables? Independent: Dependent:
Tuesday, November 8, 2016 by Embershy

Science
Which of the following correctly identifies active transport? A. Transport proteins move large molecules from areas of low. B. Transport proteins move large molecules from areas of low concentration areas of high concentration areas without the use of cellular energy. C.Small ...
Tuesday, November 8, 2016 by Ive

science
What is the volume of chlorine that is used to produce 292 grams of hydrogen chloride?
Tuesday, November 8, 2016 by lauren

Science PLEASE PLEASE HELP
Which of these statements about saltwater is correct? Saltwater freezes at a lower temperature Saltwater freezes at a higher temperature Saltwater does not freeze at any temperature Saltwaters freezing point depends on the temperature of the ocean floor***** PLEASE HELP ME
Tuesday, November 8, 2016 by ovais

science
Write about entropy and entropy generation in daily life P help me..
Tuesday, November 8, 2016 by aboddu

Science HELP PLS
1. What is a Genetic Mutation? A. the process of decreasing chromosome numbers to half of what the parent cell has B. the copying of DNA to form identical daughter cells C. a permanent change in an organism’s genetic code D. a fusion of egg and sperm cell to produce a new ...
Tuesday, November 8, 2016 by Jia

science
if a block of mass 2kg slides on an inclined plane making an angle of 60° with the horizontal.Then find work done by force of gravity
Tuesday, November 8, 2016 by AYUSH

Computer science
Working solution for specimen paper 2015 9608 for task 2
Tuesday, November 8, 2016 by Anita

Science
If 300gm water of 25°c is added into 100gm ice of 0°c then calculate the final value if this mixture.
Tuesday, November 8, 2016 by Mice

physical science
4.8g of magnesium react was completely burned in oxygen and magnesiumoxide was produced. what is the mass of magnesium produced?
Tuesday, November 8, 2016 by Ruben Amwenyo

Earth Science
Assume that the lower troposphere is isothermal with a temperature TA. An airparcel at the surfaceis heated isobarically to a temperature of T0 and then released and allowed to ascend dryadiabatically. Assume that the buoyancy is the only force acting on the parcel and that ...
Tuesday, November 8, 2016 by Angela

Science
1. What type of reproduction results in offspring being identical to the parent? A)sexual reproduction B)genetic engineering C) unicellular D)asexual reproduction 2. Which of the following is an example of sexual reproduction? A)a lizard growing a new tail B)a chicken laying ...
Monday, November 7, 2016 by Hayden

Science
Which of the following circuits will allow electric current to flow?
Monday, November 7, 2016 by Judith

science
What happens to kinetic energy of a snowball as it rolls across the lawn and gains mass
Monday, November 7, 2016 by Anonymous

Weird question science
which of these body systems performs the function of getting rid of chemical waste? a. immune b.nervous c.skeletal d.uninary d?
Monday, November 7, 2016 by softball lover

science
acrostic about motion
Monday, November 7, 2016 by Anonymous

Science
A metal from group 1 and a nonmetal from group 17 are? A. Not likely to bond. B. Likely to form a covalent bond. C. Likely to form an ionic bond.*** D. Likely to form a metalloid. Is this correct?
Monday, November 7, 2016 by Sam

Science
Every year, Eli and his family visit the Great Sand Dunes desert in Colorado. Eli notices that more sand dunes with varied shapes and sizes appear each year. Explain what causes this phenomenon. Plz answer thoroughly and detailed and DO NOT use Wikki.
Monday, November 7, 2016 by Agala

science
Kirti kept a metal spoon in a glass jar filled with pickle for a few days. She observed there were holes in the spoon. What could be the reason?
Monday, November 7, 2016 by Manavi

Science
Consider the diatomic molecule Na2. For simplicity let the basis set consist of the orbitals: and . In the molecule the overlap integral between the 3s orbitals is 0.45. Answer the following questions using the orbital energies determined using the Revised Slater’s Rules ...
Sunday, November 6, 2016 by Soso

Science
Which two systems work with the muscular systems to allow the body to move
Sunday, November 6, 2016 by Brana

Earth Science
1. The water cycle is the _____. A. distribution of drinking water on Earth ?**? B. unending circulation of Earth's water supply ?**? C. the recycling of water after industrial use ?**? D. the evaporation of water from Earth's surface ?**? 2. Plants release water into the ...
Sunday, November 6, 2016 by PleaseHelpMe777

science
one way the modern atomic model differs from the bohr model of an atom
Sunday, November 6, 2016 by Haylie

Life Science 7
What is a good way to remember Golgi Apparatus, vesicles, vacuole,and nuclear envelope
Sunday, November 6, 2016 by Jeo

math
In an examination,Dada scored x% in maths,50% in science and 70% in English studies.if his mean score for the three subject was 55%, find x
Sunday, November 6, 2016 by victoria

science
fical lengt of concave mirror =50cm m=1÷2 cm .find the position of the object
Sunday, November 6, 2016 by parag

Science
Explain why n2h4 acts as bronsted lowry base but n20 does not
Sunday, November 6, 2016 by Amelia

Science
Which organ is NOT part of the Digestive System??
Sunday, November 6, 2016 by KillerGirl143

Earth Science
1.) What is the relationship between temperature and the rate at which antacid tablets react with water? 2.) Form a hypothesis about the relationship between temperature and the rate of chemical weathering. 3.) Would a limestone building weather more rapidly in Homer, Alaska, ...
Saturday, November 5, 2016 by PleaseHelpMe777

science
Particles of mass 3m and 5m hang one at each end of a light inextensible string which passes over a pulley.the system is released from rest with the hanging parts taut and vertical.during the subsequent motion the resultant force exerted by the string on the pulley is of ...
Saturday, November 5, 2016 by nishat

science
0.150 L of 0.420 M H2SO4 is mixed with 0.100 L of 0.270 M KOH. What concentration of sulfuric acid remains after neutralization?
Friday, November 4, 2016 by sadie

Science
How many grams of sugar are needed to make a saturated solution of sugar in 100g of water at 20 degrees Celsius?
Friday, November 4, 2016 by Jay

science
a stone is thrown at an angle of 30* with the horizontal direction which strikes the tip of the building 2 m height ,if the distance of the building from the point of observation is 10 metre .find the velocity of the projectile of the stone. ans...
Friday, November 4, 2016 by nirmal kumar

science
a stone is thrown at an angle of 30* with the horizontal direction which strikes the tip of the building 2 m height ,if the distance of the building from the point of observation is 10 metre .find the velocity of the projectile of the stone.
Friday, November 4, 2016 by nirmal kumar

Math
Pedro spent 2 1/5 hours on his math himework and half as lomg on his science homework one weekend. If his english and social studies homework took 7/8 as long, how much time did he spent on homework that weekend?
Friday, November 4, 2016 by Anthony

Algebra
During a science experiment, Nico created a 32%alcohol solution by mixing 8 fluid ounces of a 50% alcohol solution with a certain amount of an 8% alcohol solution. How many fluid ounces of the 32% alcohol solution did he create?
Friday, November 4, 2016 by Jj

Science
0.745 g of kcl disloved in 100 ml of water,then molarity?
Friday, November 4, 2016 by Sonu

Science
A stone projected vertically upwards with a velocity of 20m/s. Two seconds later, a second stone is similarly projected with the same velocity. When the two stones meet, the second one is rising at a velocity of 10m/s. Neglecting air resistance, calculate the (i) lenght of ...
Thursday, November 3, 2016 by Nifes

Science
Is red hair mutated?
Thursday, November 3, 2016 by Emma hughes

science
what do mangroves ecosystem provide for organisms
Thursday, November 3, 2016 by Taylor

Science
A community obtains electricity from a coal plant. This coal plant produces pollution that has caused environmental problems in the lakes, streams, and forests within the community. What kind of secondary pollution has the coal plant most likely produced, and what kinds of ...
Thursday, November 3, 2016 by Solara

Science Psysics
A 6 kg black is placed at the very top of a ramp that is inclined at 31 degrees and the block is released to slide down the ramp. As the block slides friction exerts a constant resistive force of 17N directed back up the ramp What is the block's speed when it arrives at the ...
Wednesday, November 2, 2016 by Amy

Science
name two types of evidence used to support the theory of evolution explain how scientists use each type of evidence to provide support for evolution give one example for each
Wednesday, November 2, 2016 by LEgit_VIPer

Science
Without. Specie is not able to survive
Wednesday, November 2, 2016 by Kahvon

Science
How is a parallel circuit different from a series circuit? A: A parallel circuit only has one path for the circuit to take. B: A parallel circuit has more than one path for the circuit to take.** C: A parallel circuit has a broken path for the circuit to take D: A parallel ...
Wednesday, November 2, 2016 by Marry Hernandez

Art
Which of the following subjects enabled artists to begin using clay to form art? 1. Language arts 2. Social Studies 3. Mathematics 4. Science *** I think its D.
Wednesday, November 2, 2016 by Check this? Please...?

science
Determine the magnitude and direction of the horizontal resultant force on minibus A=1800N and B=800
Wednesday, November 2, 2016 by daisy

science
A species that influences the survival of many other species is an ecosystem is called a(n) (A) Niche species (B) Extinct species (C) Keystone species (D) Endangered species
Wednesday, November 2, 2016 by 220134

Science
Students were given materials to complete a circuit to turn on one light. The materials received were 2 wires,AA battery, and various sizes lightbulbs.What is the variable in the experiment? Wires,battery, size of lightbulb, or time of day
Tuesday, November 1, 2016 by Terry

Science
An object accelerates at 7.5m/s^2 with a force of 25N west being applied to it and there is a frictional force of 13N. What is the mass of the object
Tuesday, November 1, 2016 by Taylor

Science
If an object with a mass of 98kg at 2.5m/s^2, what amount of force is applied to it?
Tuesday, November 1, 2016 by Taylor

Science
a toy car starts from rest and accelerate uniformly at 2.0m/s square for 5.0 seconds. calculate its final velocity
Tuesday, November 1, 2016 by Clinton Darlington Yartey

Science
A car starts from rest and attains a velocity of 40 metres per second in 20 seconds. it maintains this velocity for 30 seconds and then comes to rest in 25 seconds. 1. sketch the velocity time graph for the motion.
Tuesday, November 1, 2016 by Clinton Darlington Yartey

Science
A car starts from rest and attains a velocity of 40 metres per second in 20 seconds. it maintains this velocity for 30 seconds and then comes to rest in 25 seconds. Calculate the total distance covered by the body
Tuesday, November 1, 2016 by Clinton Darlington Yartey

Science
A car starts from rest and attains a velocity of 40 metres per second in 20 seconds. it maintains this velocity for 30 seconds and then comes to rest in 25 seconds. 1. sketch the velocity time graph for the motion. 2. Calculate the acceleration of the body. 3. Calculate the ...
Tuesday, November 1, 2016 by Clinton Darlington Yartey

science plz correct me
Which of the following boxes would have the strongest gravitational pull on a third object positioned at an equal distance from both boxes? Box A: 100 g Box B: 10,000 g A. box b because it has more mass B. box a because it has less mass C. box a because it is bigger*** D. box ...
Tuesday, November 1, 2016 by cat

science
according to ohms law what is the resistance of a lightbulb if that applied voltage is 21.0 V and the current is 3.0 amps? 24 ohms 7.0 ohms** 18 ohms 3.0 ohms
Tuesday, November 1, 2016 by cat

Science 7
Which of the following boxes would have the strongest gravitational pull on a third object positioned at an equal distance from both boxes? Box A: 100 g Box B: 10,000 g A. box b because it has more mass B. box a because it has less mass C. box a because it is bigger D. box b ...
Tuesday, November 1, 2016 by cat

Science 7
1. A student studying a circuit diagram of a lightbulb, battery, and a switch correctly identifies it as a closer circuit. In this diagram, The lightbulb would be a. an insulator b. on*** c. disconnected d. off 2. The focus of gravity on an object on the surface of Mars is ...
Tuesday, November 1, 2016 by cat

science
Complete the table by writing the result of each weather pattern. Choose from the following: cold wave, drought, flood, heat wave. Weather Pattern Result 19. Thunderstorm remains over an area for many hours 20. Extended period of well-below-normal rainfall 21. Extended ...
Tuesday, November 1, 2016 by Kacie

science
The intense updrafts and downdrafts that characterize severe thunderstorms are the result of what? Thanks!
Tuesday, November 1, 2016 by Katie

science
kinsey leaves her house to exercise and run straight down a long street for 5.00 meters at a constant rate of 3m/s then turns and run back toward her house for 2 meters what is her average speed in m/s what is her displacement what is her average velocity in m/s
Tuesday, November 1, 2016 by chris

science
a stone weighing 0.2kg tied to the end of the string 0.6m long whorld in a horizontal circle in a speed of 150 revolutions per minute. calculte the tension and string
Tuesday, November 1, 2016 by physics

Science
A tree that sheds its leaves in the fall is exhibiting. A geotropism B photomotropism C phototropism D photoperiodism
Monday, October 31, 2016 by Julia

Science
What caused the syringe to leave a puddle of water after sitting in the sun for 10 minutes ?
Monday, October 31, 2016 by Anonymous

Science
a student made an electromagnet using a battery electrical tape and metal wire. she wanted to see what the effect would be if she switched the side of the battery she connected each end of the wire to. which of the following would be a correct conclusion? a. switching the side...
Monday, October 31, 2016 by machile

Science
Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion? A.The satellite with the greater mass is being pulled toward Earth w/ less of a force than the ...
Monday, October 31, 2016 by cat

Sand Dunes (Science)
Every year, Eli and his family visit the Great Sand Dunes desert in Colorado. Eli notices that more sand dunes with varied shapes and sizes appear each year. Explain what causes this phenomenon. PLZ DO NOT SAY WIKI!!!!!!!!
Monday, October 31, 2016 by Agal

Science 7
a student made an electromagnet using a battery electrical tape and metal wire. she wanted to see what the effect would be if she switched the side of the battery she connected each end of the wire to. which of the following would be a correct conclusion
Monday, October 31, 2016 by cat

Science
Imagine Two Artificial Satellites Orbiting Earth At The Same Distance. One Satellite Has A Greater Mass Than The Other One? Which Of The Following Would Be True About Their Motion? A.The satellite with the greater mass is being pulled toward Earth w/ less of a force than the ...
Monday, October 31, 2016 by carolina del la cruz

science
A motorcyclist (with a total mass of 180kg) travels up a hill. When she starts at the bottom of the hill (altitude 32m) her velocity is 43km/h. At the top of the hill (altitude 365m) she has a speed of 115km/h. The hill is 12km long and during the journey she applies a braking...
Monday, October 31, 2016 by Ottilia

HELP WITH SCIENCE FAST
1.  Most likely, ____ were formed​when lava from the moon's interior​ flooded bowl­like regions on the moon's surface. (1 point) maria* highlands craters basins 2.  Currently, the most supported ​theory of the origin of the ...
Monday, October 31, 2016 by help

science, organic chemistry
Determine the amount of compound remaining in the aqueous phase and organic phase and organic phase if a 5.0g organic compound is dissolved in 100 mL of water and is extracted with three 50-mL portion of ether (kb= 10). Compare this with one 150 ml portion with ether. Which is...
Monday, October 31, 2016 by Anonymous

Science
What is the difference between xylem and phloem?
Sunday, October 30, 2016 by Radiah

science
HOW MANY ATOMS OF OXYGEN ARE PRESENT IN 8.8G OF CARBON(IV)OXIDE
Sunday, October 30, 2016 by Vicky

Science
25cm3 of 0.1mol/dm3 Na2CO3 solution was titrated against 23.45cm3 of H2SO4 acid using phenolphthalein indicator. Calculate the concentration of the acid.
Sunday, October 30, 2016 by Zainab

Computer Science, Hardware
1.) If each stage is 1 clock cycle, calculate the number of clock cycles to execute a code stream of 10 instructions in a non-pipelined (i.e. sequential) fashion? 2.) Repeat part 1, assuming the instructions are executed in a pipelined fashion. Would this be the right formula...
Saturday, October 29, 2016 by Dio

Science
Cost is an example of _____ in designing a product. A. a constraint B. a solution C. a trade-off D. an idea is the answer A?
Saturday, October 29, 2016 by Anonymous

Science
Identifying the cause of any problems in a design is called _____. A. Patenting B. Brainstorming C. Prototyping D. Troubleshooting is the answer D?
Saturday, October 29, 2016 by Anonymous

Science
Identifying the cause of any problems in a design is called _____. A. Patenting B. Brainstorming C. Prototyping D. Troubleshooting is the answer D?
Saturday, October 29, 2016 by Anonymous

Science
Identifying the cause of any problems in a design is called____.
Saturday, October 29, 2016 by Anonymous

Science chemistry
Also. If you are given the conductivity of an unknown chemical, what the blue and red litmus paper change into when you check the chemical. And the pH level and solution type. How do you know the solution name and formula? I never learned how to find the solutions name of ...
Saturday, October 29, 2016 by Zubaida

Science chemistry
Also. If you are given the conductivity of an unknown chemical, what the blue and red litmus paper change into when you check the chemical. And the pH level and solution type. How do you know the solution name and formula? I never learned how to find the solutions name of ...
Saturday, October 29, 2016 by Zubaida

Science chemistry
Does hydrogen borate conduct electricity? We were told to search this up but I can't find it online and my class never did a lab on it.
Saturday, October 29, 2016 by Zubaida

Math
Prove that angle a is equal to angle E if angle D is equal to angle c Science I can't put the picture of the triangle I will try and explain it Two triangles that connect on one angle >< like this but a triangle and the angle in the middle ^ ( the angle that has the ...
Saturday, October 29, 2016 by Ali

Science
Calculate the pH of a solution containing 2g of caustic soda per litre of water
Friday, October 28, 2016 by Deepali

True or False Please Help
(10 Environmental Science True or False Questions. Please correct me if I'm wrong.) 1. Domestic of animals and plants through history has enabled humankind to improve their lifestyle. (True) or False 2. Domestication is the process of selecting wild organisms for their ...
Friday, October 28, 2016 by GummyBears16

Science
Acrostic poem for L A N D F O R M S
Thursday, October 27, 2016 by txhnth

science
flow chart to find producr,average,sum,largest of three numbers?
Thursday, October 27, 2016 by vinay

science
The lowest possible energy position for an electron is known as the ground state. true or false
Thursday, October 27, 2016 by Anonymous

AP environmental science
To raise funds to meet its annual budget, a state government is debating whether to sell a large section of public forest to a logging company. Evaluate this plan in terms of two ecosystem services that the state might gain and two services the state might lose if the forest ...
Thursday, October 27, 2016 by help meeee :0

science
1.The trait for green eyes is dominant (Y) to brown eyes which are recessive (y). Determine the eye color a child will have with a Yy genotype: ☐Blue Eyes ☐ Green Eyes ☐ Hazel Eyes ☐ Brown Eyes 2. A bird that is heterozygous for the yellow feather trait...
Thursday, October 27, 2016 by ANSWERS PLEAAAAAASSSSSSSSEEEEEEEE

Computer Science
Write a program that Will prompt a user to enter his/her name and number.use a while loop that will display the user name times the entered number
Thursday, October 27, 2016 by Tom

Earth Science
20. Contrast point source pollution and nonpoint source pollution. Can someone help me please?!?!?! Asap please?!?!?!?!
Thursday, October 27, 2016 by Just a confused person...

science
Urea forms a ideal solution in water. Determine the vapour pressure in an aqua solution containing 10 percent bymass at 40degree Celsius
Wednesday, October 26, 2016 by priya

Science
A sky driver jumps out of a plane and as he fall he has acceleration of 9.8 m/s squared. How many seconds will it take to reach a speed of 28.5 m/s?
Wednesday, October 26, 2016 by Patricia

Science-physics
A bottle weighs 35g when empty,95g when filled with water and 119g when filled with an organic liquid. What is the capacity of the bottle: A-60cm cube B-84cm cube C-130cm cube D-154cm cube
Wednesday, October 26, 2016 by Matthew

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