Wednesday
May 25, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Science
Volume of 12M HCL taken for preparing 1M HCL (100 ml Sol {
Sunday, March 13, 2016 by Bushra

Science
chemical equation for sodium hydrogen carbonate and acetic acid (not balanced)
Sunday, March 13, 2016 by Sai Swarup

science
initial condition V1= P1= formula
Sunday, March 13, 2016 by beah

science
A ball from a height 'h' on a horizontal floor.If it loses 60% of its energy on hitting the floor then height upto which it will rise after first rebounce is?
Saturday, March 12, 2016 by anagha

Science
A ball thrown vertically upward has a speed of 5.0 m/s at a height of 3.0m. The mass of the ball is 1.2 kg. Find its mechanical energy
Friday, March 11, 2016 by Karl

Science
When an object and screen are separate d by 1m distance. when a convex lens is place d at 30 cm from the object it forms a clear image then the image distance is?
Friday, March 11, 2016 by Ravi

Science ap chem
For which of the following solutions must we consider the ionization of water when calculating the pH or pOH? (a) 3 × 10−8 M HNO3 (b) 0.10 g HCl in 1.0 L of solution (c) 0.00080 g NaOH in 0.50 L of solution (d) 1 × 10−7 M Ca(OH)2 (e) 0.0245 M KNO3
Friday, March 11, 2016 by Anonymous

Science
The pH of a 0.10-M solution of caffeine is 11.16. Determine Kb for caffeine from these data: C8H10N4O2(aq)+H2O(l) ⇌ C8H10N4O2H+(aq)+OH−(aq)
Friday, March 11, 2016 by Anonymous

Science
please check my answers:) 1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of ...
Friday, March 11, 2016 by boo

Science
2.Why are biologists concerned about ecosystem disruption? 1.Explain the process of succession. Succession is a natural change in the area that results in one group of plants replacing a group before. for #1 that is all I have so if you could give me a website that would be ...
Friday, March 11, 2016 by Katherine P

Science
water is a(n) factor in all ecosystems that all living things requires?
Friday, March 11, 2016 by ......

Science
1.Explain the process of succession. 2.Describe how changes in an ecosystem can affect organisms that live there. 3.Describe the amount of time needed for ecosystem recovery If anyone would help me that would be great, websites, answers, anything at all.
Friday, March 11, 2016 by Alec

political science
Before President Obama, when was the last time a Senator successfully ran for President? A.1824 B.1960 C.Obama was the first Senator to ever win D.1910
Friday, March 11, 2016 by ryan

Science
1.Explain the process of succession. 2.Describe how changes in an ecosystem can affect organisms that live there. 3.Describe the amount of time needed for ecosystem recovery
Friday, March 11, 2016 by Tessa

political science
I have no clue on this one!!!! Bill Clinton's focus on domestic issues, what was NOT part of his "E2M2" campaign? A.Medicare B.Economy C.Education D.Energy
Friday, March 11, 2016 by ryan

political science
the Presidential Campaign has three phases. What is the second phase? A.General Election B.Declaring Candidacy C.Party Conventions D. Nominating Process
Friday, March 11, 2016 by ryan

political science
In the "Campaigns and Elections By the Numbers" box, the book lists the number of people that filed to run for President. It says 167 filed as Republicans, 83 filed as Democrats, and 1 filed under the _______ Party. A.Libertarian B.Green C.Jedi D.Vulcan
Friday, March 11, 2016 by ryan

math and science
1500kg motor car was travelling at 36m\s comes to rest over a distance of 40m.calculate. {a}retardation. {b}an average force that brings the car to rest
Friday, March 11, 2016 by prisca

Science
What are the main parts of the prefrontal cortex?
Thursday, March 10, 2016 by Lana

Math and science
a rock has a mass of 3000 grams what is the mass in kilograms that's the question we need to know how to be converted or figure this question out in the layman's term
Thursday, March 10, 2016 by Grace and dad

Science
1. Which of the following illustrates mechanical weathering? A.Carbonic acid weathers marble and limestone. B. As plants grow, they produce weak acids that slowly dissolve rock** C. Oxidation causes weathering in rock D. Repeated freezing and thawing in rocks causes weathering...
Thursday, March 10, 2016 by Izzie

science
If a sheet of Tarpaulin (350gsm) 5m high 7m wide at a pitch of 45% with wind speed of 60mph what will be the upwards force (lift force)in Kg?
Thursday, March 10, 2016 by sam

Physical science
What are photons
Thursday, March 10, 2016 by Amkelwa

Science: Chemical Bonds
Two nonmetals from group 16 are likely to form a: triple and ionic bond double and ionic bond triple and covalent bond double and covalent bond I don't get this, could someone please explain?
Thursday, March 10, 2016 by Lady Phantomhive

Science HELP!!!!
1.To study a rock sample, geologists observe the rock's mineral, composition, color, and temperature. true false*** 2.finds a rock with layers and smaller pieces of other rocks embedded in it. the rock is most likely A igneous B sedimentary*** C metamorphic D chemical 3. ...
Thursday, March 10, 2016 by ZOBO322

Science
Copper plate is used as cathode but it cann't be used as anode during electrolysis of water, why?
Thursday, March 10, 2016 by Unique

Science
Copper plate is used as cathode but it isn't used as an anode, why?
Thursday, March 10, 2016 by Dumi

Science
What wave property is labeled X? a. Frequency b. amplitude c. wavelength d. wave speed Is it C? Thank you!
Thursday, March 10, 2016 by Jane Doe

science
usefullness of volume in the 21st centuary
Thursday, March 10, 2016 by nishi

Science
what volume will 5.00g of nitrous oxide gas occupy at 50 degree celcius and 4.00L?
Thursday, March 10, 2016 by Dorothy May Puyat

math111
in a science class,65 student study physics while 40 study chemistry.if there are 93 student in the class,how many student study both physics and chemistry?
Thursday, March 10, 2016 by james

Science
If a cheetah runs 50 miles in 5 minutes how fast is it running?
Thursday, March 10, 2016 by Anonymous

science
how are artificial flavors made
Wednesday, March 9, 2016 by Andrea

science
what is partially hydrogenated soybean oil and how is it made
Wednesday, March 9, 2016 by Andrea

science
what is the number of cycles an oscillator completes in one second is known? what is a force that always acts to pull a system back toward its equilibrium position? what is the distance from one point on a wave to the same point in the next cycle of the wave called? what is ...
Wednesday, March 9, 2016 by arianna

Science chemistry
An excces of sulfur dioxide was reacted with 0.150 g of oxigen gas. A mass of 0.725 g of sulfur trioxide was recovered
Wednesday, March 9, 2016 by Mss.unknown

Science
Hi. Could you Please check my answers? I just want to make sure they are correct. Thanks for the help in advance :). True or false: All matter on Earth contains energy- true? True or false: the molecules in frozen water are in motion- true? True or false: ice is too cold to ...
Wednesday, March 9, 2016 by Anonymous Af

science
what is isotopes
Wednesday, March 9, 2016 by hamza

Science
if a car travels once around a 100-meter racetrack what is its displacement
Wednesday, March 9, 2016 by June

Science
1. The streams and smaller rivers that feed into a main river are its A. watersheds B. tributaries** C. divides D. reservoirs 2. How are seamounts like the Rockies? A. Both are forms of mountains** B. Both are made of the same kind of rock C. Both are connected to the ocean&#...
Wednesday, March 9, 2016 by McKayla

Science. (I'm patient, no rush)
Which of the following sets of words can be used to describe the outputs of photosynthesis? A. water, glucose, light energy B. Carbon dioxide, glucose, chemical energy C. oxygen, glucose, chemical energy D. glucose, oxygen, light energy*** Am I correct?
Wednesday, March 9, 2016 by No one special

science
Three charges, +2.5 micro coulomb, -4 micro coulomb and 6.3 micro coulomb, are located at (0.20m, .15m), (.50m, -.35m), and (-.42m,-.32m) respectively. What is the electric field at the origin?
Wednesday, March 9, 2016 by micah

Science
Is Gc (32.2 lbmft/lbfs^2) equal to gravity? I think it is, but I'm kinda confused about the whole concept. Could someone explain it to me? Thank you very much.
Wednesday, March 9, 2016 by Danny

science
Atomic mass of Sodium atom
Wednesday, March 9, 2016 by varun

Science
Ca = 0.75 , Cb = 0.735, and Ka = 7.87044 × 10 6 volume of acid is 100 mL. What is the volume of base at the equiva- lence point of this titration?
Wednesday, March 9, 2016 by Tina

Science
Estimate the pH of a solution containing 0.5 L of 0.4 M HClO4 and 0.5 L of 0.2 M NaOH without using a calculator.
Wednesday, March 9, 2016 by Tina

science
Metal obtained by chemical reduction is it iron or aluminium?
Tuesday, March 8, 2016 by sanjay

Science Help
1. Over which interval is the velocity greatest? FILL IN THE BLANK ____ 2. Over which interval(s) is the velocity zero? FILL IN THE BLANK ____ 4. What is the average velocity in m/s from A to B? FILL IN THE BLANK ____ 5. The velocity of an object goes from 4 m/s to 12 m/s in ...
Tuesday, March 8, 2016 by Leet Speaker

Social studies
Advances in science from the Scientific Revolution were applied to human affairs during the ____________. A. Industrial Revolution. B. French Revolution. C. Enlightenment. (MY ANSWER) D. Age of exploration.
Tuesday, March 8, 2016 by LOVE

Science
Multiplying Rabbits Suppose that a pair of rabbits produces six offsrping: 3 males and 3 females. Assumes that no offspring die. 1. If each pair of rabbits breeds only once, how many offspring would be produced each year for 5 generations? 2. Construct a graph of your data. ...
Tuesday, March 8, 2016 by Becky

Science
Which abiotic factor is essential to all aquatic ecosystems excpet the ocean hydrothermal vents, and why? a. phytoplankton, because it provides a source of food b. salt, because it provides the necessary environment for organisms to move about c. deep water, because it ...
Tuesday, March 8, 2016 by No one special

More Science
5. What is the major difference between ectotherms and endotherms? A, Whether or not the animal builds a nest on land. B, whether or not the animal has been found on several continents C, whether or not the animal maintains a constant body temperature*** D, whether or not the ...
Tuesday, March 8, 2016 by No one special

Science
1. Which of the following characteristics of the Arctic rabbit is specifically an adaption living in the tundra? A. small size B. keen eyesight C. strong legs D. white fur*** Am I correct?
Tuesday, March 8, 2016 by No one special

science
A car initially moves along a straight road at 50 km/hr, and then turns around to travel at 80 km/hr in the opposite direction. What is the car’s change of velocity?
Tuesday, March 8, 2016 by ramesh

science
1) Which law of chemical combination is illustrated by the fact that 168g fe reacts with 72g H2O to form 232g fe3O4 n 8gH2
Tuesday, March 8, 2016 by sameer

8th grade science
I'm not sure what's the correct answer: 9)Which of these characteristics can only be attributed to a wave of red light? A)The energy of the wave travels in the same direction as the wave travels. B)The wave travels by vibrating the particles of the medium at a high ...
Monday, March 7, 2016 by Alexis

science
the oxide of which one of the following shows acidic properties?
Monday, March 7, 2016 by Subham Biswal

Science
The trees leaves make a kind of cover that cover over the other plants in the rain forest. What is this part of the rainforest called?
Monday, March 7, 2016 by Lily

Science
Are air masses that form over land moist
Monday, March 7, 2016 by Genesis

science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?
Monday, March 7, 2016 by cuz im not too smart.

science
A machine raises a load of 600N through a height of 1.5m when an effort of 100N moves a total distance of 20m.(a) calculate the work done in raising the load.(b) what is the mechanical advantage of the machine?(c) calculate the efficiency of the machine.
Monday, March 7, 2016 by Anonymous

English
I thought it was C for this Victor Frankenstein recounts the influences that lead to his great experiment: I feel exquisite pleasure in dwelling on the recollections of childhood, before misfortune had tainted my mind and changed its bright visions of extensive usefulness ...
Sunday, March 6, 2016 by Henry

science fair
will a heavy metal spring launch a baseball 7 feet in the air with 5 pounds of preasure
Sunday, March 6, 2016 by bill

Science
When two hydrogen atoms bond with one oxygen atom to form water, what happens to the electrons? A. Each hydrogen atom donates its electron to the oxygen atom. B. The oxygen atom donates an electron to ach hydrogen atom. C. A pair of electrons is shared at each of the hydrogen-...
Sunday, March 6, 2016 by Plz Help!

Science
Name each compound by ionic, hydrogen, or molecular compound and name the following? Im stuck on these! help please!! 1- Al2S3 2- SrI2 3 - CL2O5 4 - FeCl2 5 - BeH2
Sunday, March 6, 2016 by Julie

life orientation
Identity three courses or study field associated with science and give 2 reasons for each
Sunday, March 6, 2016 by maria

math science algebra geography
vvhat r hoes
Sunday, March 6, 2016 by hoez342

science
Gold(at weight 197gmol-1) crystallizes in a cubic closest packed structures ( the face centred cubic ) and its density is 19.3 gcm-3 .calculate its atomic radius.?
Sunday, March 6, 2016 by Anonymous

life science
A suitable aim for investigation 1 to test glocose
Sunday, March 6, 2016 by molepo sj

Science
What is the balanced chemical equation for "solid calcium hydrogen carbonate reacts with hydrochloric acid solution producing carbon dioxide,water and calcium ions in solution?"
Sunday, March 6, 2016 by Anonymous

math
Here is bob's test score math 65 arts 86 science 84 social studies 78 if his average score is 80 ,how many marks did he make in gramma
Saturday, March 5, 2016 by cherise

geography, history, life science and maths literacy
what courses can I do at university( NWU )
Saturday, March 5, 2016 by mpho

Social science
According to Justice William O. Douglas, where can zones of privacy (the right to privacy) be found in the Constitution? Question 2 options: throughout the Constitution in the penumbras of the Bill of Rights in the First Amendment in the writings of the Founders I think it'...
Saturday, March 5, 2016 by Gates

Social science
The Second Amendment continues to be a controversial issue. One of the main questions is whether it was meant as a _______ freedom or _______ freedom. Question 4 options: individual; group absolute; conditional temporary; permanent good; bad
Saturday, March 5, 2016 by Gates

political science
The Lilly Ledbetter Fair Pay Act was passed by President Obama in 2007 in order to address what issue?
Saturday, March 5, 2016 by sammie

political science
The former Soviet Union cannot be considered a democracy because A. it did not regularly hold elections B. it permitted no acts of conventional participation C. it had no legislature D. there was only one political party
Saturday, March 5, 2016 by Anonymous

political science
Which of the following conditions was NOT a part of the Lemon Test, as established by the Supreme Court? A. They must not entangle the government exclusively with religion B. The primary effect must not be to advance or inhibit religion C. There must be a secular purpose D. ...
Saturday, March 5, 2016 by Anonymous

political science
According to Justice William O. Douglas, where can zones of privacy (the right to privacy) be found in the Constitution? A. throughout the Constitution B. in the penumbras of the Bill of Rights C. in the First Amendment D. in the writings of the Founders
Saturday, March 5, 2016 by Anonymous

science
How can we measure the Gravitational field intensity of any place on earth ?
Saturday, March 5, 2016 by Sabbu..

science-math
A pharmacist has an 18% alcohol solution. How much of this solution and how much water must be mixed together to make 10 liters of a 12% alcohol solution?
Saturday, March 5, 2016 by wonka

science
Calculate the wavelength of a wave of frequency 40 MHz propagating in a medium Speed of light-(3*10to the power 5. )
Saturday, March 5, 2016 by Anonymous

Science
What is the charge on 500 mg of electron?
Saturday, March 5, 2016 by Shahkar

Science
How does lustre affect the amount of heat being absorbed by a black can
Friday, March 4, 2016 by Sarah

science
A example of negative feedback a. elevated free t4 resulting in elevated trh b. elevated free T4 resulting in elevated tsh c low free T4 resulting in elevated tsh d. low free t4 resulting in low tsh i think its B. not sure.
Friday, March 4, 2016 by sara

Science
What caused the ten years war
Friday, March 4, 2016 by Grace

Physical science
A 11-kg box is dragged across a frictionless surface by a force F=55N. the box travels 4.0ft. what is the work done by the applied force F and the work done by the normal force?
Friday, March 4, 2016 by barbara

Science Problem Plz Help
A charge q1=7.00 x 10^-6 is placed 0.300m from a second charge q2=-5x10^-6 C. Find the magnitude the force between the two charges.
Friday, March 4, 2016 by Student Lexi

Science
When two hydrogen atoms bond with one oxygen atom to form water, what happens to the electrons? A. Each hydrogen atom donates its electron to the oxygen atom. B. The oxygen atom donates an electron to ach hydrogen atom. C. A pair of electrons is shared at each of the hydrogen-...
Friday, March 4, 2016 by Plz Help!

snowmobiles/science
What other things would be used to make a snowmobile accelerate?
Friday, March 4, 2016 by Brandy

Science
Does the tilt of the earth cause one hemisphere to be closer to the sun? True or false False.
Friday, March 4, 2016 by LOVE

Maths literacy ,life science,history,geography
Which university or college take the subjects that iam doing
Friday, March 4, 2016 by Lauren

maths,geography,life science,history
explain in a short paragraph what can trgger spectator aggressive in sport
Friday, March 4, 2016 by masabata

math lit,life science,geo and history
which careers require these subjects?
Friday, March 4, 2016 by aviwe

Science
A charge q1=7.00 x 10^-6 is placed 0.300m from a second charge q2=-5x10^-6 C. Find the magnitude the force between the two charges.
Friday, March 4, 2016 by Lexi

Science
A cord of negligible mass is wound around the rim of a flywheel of mass 20 kg and radius 20 cm. Steady pull of 25 N is applied in tue cord. The flywheel is mounted on a horizontal axis with frictionless bearings. Compute the angular acceleration of the wheel. Find the work ...
Friday, March 4, 2016 by Rabeena faizal

Science
An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.5 A, how much electrical energy is used by the bulb in 15 minutes?
Friday, March 4, 2016 by April

Science
What is the force that results from a 3,000 kg car accelerating at 20.00 m/s2? A. 150.0 N B. 3,000 N C. 3,020 N D. 60,000 N** I think D
Thursday, March 3, 2016 by Esther

Science
How many valence electrons does magnesium (Mg) have? A. 12 B. six C. three D. two
Thursday, March 3, 2016 by Plz Help!

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

  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>>