Wednesday
September 28, 2016

Homework Help: Science

Branches of Science

Recent Science Questions

Math, science,English and social studies
Hi, do you help with homework? Do you help with reading? Paying money?
Monday, September 19, 2016 by Mafanta Dulleh

science
Johnny stacked 200 cans, each weighing 5 N, on shelves 1 meter high in only 100 seconds. How much power did he use for the task?
Monday, September 19, 2016 by dolly

Science
A rock is held steady over a cliff and dropped. 1.1 seconds later, another rock is thrown straight down at a speed of 12.1 m/s, and hits the first rock. How far have the rocks dropped before they collide? How long is the first rock in the air before it gets hits by the second ...
Monday, September 19, 2016 by Gabriel

Science
Is mushroom, desert, temperature, coral, steak, athletes foot, mold, tree, rocks, dirt, gold, plastic, grapes, turnda Biotic, both, or abiotic
Monday, September 19, 2016 by Kitkat

Science
10. How can serveying reading material improve your comprehension? (1 point) > Knowing the main ideas ahead of time helps you know where to focus your attention**** > Reciting the answers to questions out loud will help you remember them > Reading your head make ...
Monday, September 19, 2016 by Lexi

biology/science
Oxygen attracts electrons more strongly than hydrogen does. What kind of bond forms between the two hydrogen atoms and single oxygen atom that form a water molecule? A. A metallic bond B. A hydrogen bond C. An ionic bond D. A polar bond Currently stuck here.
Monday, September 19, 2016 by Logan

science chemistry
balance Redox :- CuS + SO4²- = CuO+SO2
Monday, September 19, 2016 by Yashvi

Science
A bus travels first 20 km in 1 hour next 20 km in half an hour and next 20 km in 1 hour
Monday, September 19, 2016 by Vasu

Biology
I would like some help if that is OK, like soon!:) 1.) A group of scientists proposes an idea that a chemical compound will enable bean plants to grow faster. They grow one group of bean plants in the presence of the compound and another group in the absence of the compound. ...
Monday, September 19, 2016 by Jessica

science
A 100 kg cart accelerates from 0 to 20 m/s in 5 seconds. What is the acceleration?
Monday, September 19, 2016 by nyeem

Science
A piece of unknown metal with a mass of 68.6 grams is heated to an initial temperature of 100 Celsius and dropped into 42 grams of water with an initial temperature of 20 Celsius in a calorimeter the final temperature of the system is 52.1 Celsius the specific heat of the ...
Sunday, September 18, 2016 by Raven

Science 7th Grade
How do i solve this. Atomic Theory Date (year) Name of Scientist(s) Contribution to the Theory Source 5th century BC Leucippus and Democritus They proposed that all matter is composed of tiny particles called atoms that can’t be split into smaller pieces and that attach ...
Sunday, September 18, 2016 by None Of Your BIzz

Physical Science
While rearranging a dorm room, a student does 310 J of work in moving a desk 1.5 m. What was the magnitude of the applied horizontal force?
Sunday, September 18, 2016 by Anonymous

science
what mass of CO2 can be formed when 14.17g of C4H10 are burned in excess oxygen I do not even know where to start
Sunday, September 18, 2016 by gearah

Computer Science
What is the rule for this function? input 1 output 2 input 2 output 5 Input 3 output 12 Input 4 output 34 Input 5 output 135 Input 6 output 741
Sunday, September 18, 2016 by Rima

Science
A transformer has 60 turns in the primary and 1200 turns in secondary.if the primary voltage is 500 V what will be the secondary voltage be? What will the current be if the primary if the secondary carries 2.0 A
Sunday, September 18, 2016 by Hannah

Science
Which of these choices do both sustainable and organic agriculture avoid? A. Artificial hormones B. Pesticides C. USDA certification D. Antibiotics
Sunday, September 18, 2016 by Dominic

science
Maximize value Z = 15x + 10y subject to the constraints 3x + 2y ¡Ü ¡Ü 12, 2x + 3y ¡Ü ¡Ü 15, x ¡Ý ¡Ý 0, y ¡Ý ¡Ý 0 is
Sunday, September 18, 2016 by chirag

science
calculate the volume oqupaied by 20gram H2 at NTP
Saturday, September 17, 2016 by abhishek

Science
How many grams of CO2 is produced from 855 grams of C6H12O6 in the process of cell respiration?
Saturday, September 17, 2016 by Arvs

science
What are the effects of pollution in plants?
Saturday, September 17, 2016 by afikile mputane

Science
A saturated solution of kcl is prepared at 25degree celsius. What would happen if temperature is cooled to 10degree celcius? ????????
Saturday, September 17, 2016 by Anonymous

Science Chemistry
A saturated solution of kcl is prepared at 25degree celsius. What would happen if temperature is cooled to 10degree celcius?
Saturday, September 17, 2016 by Jim

Science
Please help me. This is the question. A diver weighing 500N is positioned at the right end of a diving board with a length of 4m and negligible weight. The board is bolted down at the left end while being supported 1.5 m away from the fulcrum. a.)Find the forces F1 and F2 that...
Saturday, September 17, 2016 by Kenneth

Science
You're in a room with two doors one door leads to nothing and the other one leads outside one door always tells the truth and the other always lies you get one question to ask one door what would you ask to figure out which door to take to get outside
Friday, September 16, 2016 by Christopher

Science (7 grade) Help Me
how should i proper for a file study and what should i do if there is an accident??
Friday, September 16, 2016 by Kyle steward

Science
Create a model which explains the water cy le
Friday, September 16, 2016 by Sandeep kang

Science
A car moved with a speed of 60km/h for 2 hours and then with a speed of 80km/h for the next 1 hour.calculate the total distance covered by the car Answer:60/2=30km/h 80/1=?
Friday, September 16, 2016 by Narasimman

Science
How do you round the mass of the plactic cup that is 5 grams
Thursday, September 15, 2016 by Elsa

Science
What does lmao mean?
Thursday, September 15, 2016 by Anonymous

Science
Which phrase best describes a car that has positive acceleration. A. The car is moving slowly. B. The care is slowing down. C. The car is speeding up. D. The car is moving fast. I think its it`s C. But i need help. Please
Thursday, September 15, 2016 by SinistarStewie

Science
Please help me with my sciene? 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? (...
Thursday, September 15, 2016 by eannaL

Science
Which of the following tools can bd used to measure mass? A) a graduated cylinder B) a triple beam balance C) a mercury thermometer D) a bathroom scale I think its B, thank you for the help!
Thursday, September 15, 2016 by Autumn

Science Project topic question
If you are looking into comparing the effects of various oils on pseudomonas aeruginosa, what will you search for aside from the oils you're thinking of testing it on the bacteri and the infection?
Thursday, September 15, 2016 by Renooo

science
Wind energy is used in?
Thursday, September 15, 2016 by Physical

Science
A dolphin has 5,200,000 ppm of DDT. Phytoplankton contains 10 ppm. How many times greater is the concentration of DDT in the dolphin. My answer was 520,000 times greater Is my answer correct? Also a
Thursday, September 15, 2016 by Please check my answers

Science
A pulley system having 5 pulleys is used to raise a 450N load. find the mechanical advatange and hence the effort if the efficiency is 75%
Thursday, September 15, 2016 by Emperor Sam

Science
Why can'y pyramids of energy never be inverted?
Wednesday, September 14, 2016 by Cathy

Physical science
flammability is a material’s ability to burn in the presence of? A)hydrogen B)nitrogen C)oxygen D)carbon dioxide I think the answer is A am i right?
Wednesday, September 14, 2016 by Fred

Science
What is ecrfenine unscrambled?
Wednesday, September 14, 2016 by Tee

science
how much salt must be added to how much water to create 10ml of a 10% saline solution.
Wednesday, September 14, 2016 by amy

Science
in a homes central heating system when the room temperature measured by the thermostat reaches a set value the thermostat sends a message to the heater and the heater switches off These action are an examples of a
Wednesday, September 14, 2016 by Leila

Science
The relative age of a rock is... A. It's age based on how much carbon-14 it contains. B. It's age compared with the ages of other rocks. C. Less than the age than of the fossils it contains. D. The number of years since it formed. I think it's D but my friend says ...
Wednesday, September 14, 2016 by Castiel

science
What should be the range for the exponent of [H+] in solutions that are characterized as acidic? A. 0 to -0.07 B. 0 to 0.7 C. 0 to -7 D. 0 to 7
Wednesday, September 14, 2016 by logan

Science
How many grams of sodium bicarbonate (NaHCO3) are needed to make a 0.6M solution?
Wednesday, September 14, 2016 by Beth

Science
Which of the following reasons best explains why scientst need a standard measurement system
Wednesday, September 14, 2016 by Jada

social science grade 8 138
10 advantages of colanisation and write if the advantage has a negative or positive impact give a reason for your answer
Wednesday, September 14, 2016 by maphuti

Physical science
A simple lever is used to lift a heavy load. When a 58-N force pushes one end of the lever down 1.1 m the load rises 0.14 m. How much work is done by the 58-N force? What is the gain in potential energy of the load? How does the work done compare to the increased potential ...
Wednesday, September 14, 2016 by Jennifer

earth and science
what continent lies between 20 and 60 degress north lattitude and between 160 and 50 degrees west longtitude
Wednesday, September 14, 2016 by ana

science
Which of the following is the pOH range of gastric acid? A. 1.5 to 3.5 B. 10.5 to 12.5 C. 1.5 to 2.5 D. 6.5 to 7.5
Wednesday, September 14, 2016 by logan

science
When are more products of a reaction available initially than at equilibrium? A. K = 0 B. Q < K C. Q = K D. Q > K
Wednesday, September 14, 2016 by logan

science
When Q < K, what can you conclude about the reaction? A. The reaction is not yet at equilibrium, and the reaction will proceed in the forward direction. B. The reaction is not yet at equilibrium, but the direction of the reaction must be experimentally determined. C. The ...
Wednesday, September 14, 2016 by logan

Physical science check answers
1. Imagine that you pushed a box, applying a force of 60 newtons, over a distance of 4 meters. How much work have you done? 15 joules 56 joules 64 joules 240 joules*** Question 2 (Multiple Choice Worth 2 points) Which statement best describes the relationship between atoms and...
Wednesday, September 14, 2016 by Summer Moriarty

science
If the reaction is at equilibrium, which change will help to increase the amount of ammonia formed? 3H2(g) + N2(g) 2NH3(g) + heat A. Removing nitrogen B. Raising the temperature C. Lowering the pressure D. Adding hydrogen
Wednesday, September 14, 2016 by logan

Science
The weight of a body on the surface of the earth is 392N .What will be the weight of this body on a planet whose mass is double that of the earth and radius is four times that of the earth
Wednesday, September 14, 2016 by Saranah

science
A ball is dropping from the roof and the window of 3m where a boy observe ball cross window in 0.5sec find the distance of wall above the window
Wednesday, September 14, 2016 by Jagrati

Science
Why does hot water not make the btb turn color to yellow
Tuesday, September 13, 2016 by Kailei

Science-Physics
Why is it easier to float in the Dead sea than the Caribbean sea?
Tuesday, September 13, 2016 by Anonymous

Science
1. Why do scientists use models? a) Scientists use models to learn about things that are too small, too large, or too complex to observe directly. b) Scientists use models because doing so is always part of the scientific method. c) Scientists use models because they always ...
Tuesday, September 13, 2016 by CutiePie

science
how much force is needed to accelerate a 7.1 kg skier at 4 m/s/s?
Tuesday, September 13, 2016 by michael

natural science
1.write down the aim of the investigation? 2.make aprediction ofthe outcome ofthe investigation? 3. Switchon the hotplate to its maximum heat and start the stopwatch immediately after that?
Tuesday, September 13, 2016 by anam

science
What change do you expect if the value of the reaction quotient is greater than the value of the equilibrium constant? A. The rate of the forward reaction is greater than the rate of the reverse reaction. More reactant forms. B. The rate of the forward reaction is greater than...
Tuesday, September 13, 2016 by logan

science
I need some ideas on new lab tools to invent for the field of Radiologist.
Tuesday, September 13, 2016 by cennen

science
A pipe of diameter 80mm is fitted with a branch section into which fit two pipes of equal diameter. If it is desired that the velocity remain constant throughout, determine the required diameter of each of the branch pipes.
Tuesday, September 13, 2016 by Pam

Science
Assume that a spacecraft can travel at the speed of 100,000 km, how many days will it take to get from Earth to Mars?
Tuesday, September 13, 2016 by Ryan

science
How does deltaG° relate to K for a reaction? A. When deltaG° > 0, K < 1 and products are favored. B. When deltaG° < 0, K > 1 and products are favored. C. When deltaG° < 0, K < 1 and reactants are favored. D. When deltaG° > 0, K > 1 ...
Tuesday, September 13, 2016 by logan

science
two bodies having mass m1 of 2kg and m2 of mass 4kg are hanged with pulley. Find the acceleration and tension of the string.
Tuesday, September 13, 2016 by Divyansh

science,physics
a 5kg bomb exploded into two fragments .If one fragment with 3 kg moves in a direction with 5m/s then what is the velocity of the second fragment of mass 2kg
Tuesday, September 13, 2016 by jhon

science
Changes in the carbon cycle cause global temperatures to rise. How might this affect the water cycle?
Monday, September 12, 2016 by yar

Science
Which of the following means using specific observations to make generalizations? A: BIAS B: Subjective C: Deductive Reasoning D: Inductive resoning is the answer c?
Monday, September 12, 2016 by James

science
i want to know the density of a golden nugget . the nugget i found had a mass of 120 g and took up a space of 6 mL . what is the density ?
Monday, September 12, 2016 by Alexis

Science
An athlete runs on a circular track 7m.calculate the distance and displacement covered by him after 3 rotations?
Monday, September 12, 2016 by Jhon

Science
An empty 1.5 litre Pepsi bottle is filled with uncooked rice. A marble is put into the bottle and a pencil used to push it down until it is buried in the rice. The bottle is capped and shook hard back and forth. The bottle is then placed on the table. What do you observe?
Monday, September 12, 2016 by Billy

Science
What the force of attraction between earth and objects on earth surface pesanteur..I need it English
Sunday, September 11, 2016 by jaseanturner1017

Chemistry
home / study / science / chemistry / questions and answers / a subtilisin with an active site mutation of his ... Question: A subtilisin with an active site mutation of His t... EDIT QUESTION A subtilisin with an active site mutation of His to Ala had a substantially decreased...
Sunday, September 11, 2016 by Anonymous

Science
Estimate the velocity of the groundwater flowing from a point 500 feet from a creek. The point is 50 feet above the surface of the creek and the permeability of the subsurface is approximately 10.5. Approximately how long would it take the groundwater to reach the creek?
Sunday, September 11, 2016 by Ndzewiyi

science
the drawing of three particle far away from any other particle located in a straight line .masses of these particles are Ma=363kg,Mb=517kg,Mc=154kg.find the magnitude and the direction of net gravitational force acting on them
Sunday, September 11, 2016 by jona

Science
How resistivty of conductor vary if area is halved,length is double,area is double
Sunday, September 11, 2016 by Anonymous

Science
how does the initial procedure compare to your updated procedure? What changes did you have to make? Why? How can I answer this question? Please help me... ;(
Saturday, September 10, 2016 by CC

science
the density of water approximately 1.00 g/mL. Would the piece of wood in the previous question (#1) float or sink
Saturday, September 10, 2016 by brit

Science
If a ball is thrown upward on Mars with an initial velocity of 10.0 m/s and lands 1.50 m below its launch point 5.54 seconds after it is thrown , what is the local acceleration due to gravity one Mars .... Plzzzzzzzzz answer it's really important I have to submit it ...
Saturday, September 10, 2016 by Katherine

Physical science
To pass a slow vehicle within the length of the passing lane roger got up well over the speed limit . He then spotted a police cruiser coming around the corner and hit the brakes . If he braked at 6 m/s^2 , and it took him 1.50 seconds to get back to 40 m/s , what speed had he...
Saturday, September 10, 2016 by Katherine

science ap chemistry
What is the equilibrium expression for the following acid dissociation reaction? CH3COOH + H2O CH3COO- + H3O+ A. [CH3COO-][H3O+]/[CH3COOH][H3O] B. [CH3COOH][H2O]/[CH3COO-][H3O+] C. [CH3COOH]/[CH3COO-][H3O-] D. [CH3COO-][H3O+]/[CH3COOH]
Saturday, September 10, 2016 by jessie

Science
How many moles of cacl2 would be used in making 0.5L of a 2M solution?
Saturday, September 10, 2016 by Cece

Science
The Strange Case of Beriberi In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi. Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure. Scientists thought the disease might be ...
Saturday, September 10, 2016 by Matt

science
how Avogadros hypothesis applied to show molecular mass of volatile substances is twice of Vapour density?
Saturday, September 10, 2016 by rina

Science
A convex mirror forms an image of half the size of the object. When it is moved 15cm away from the object the size of the image becomes 2/5times that of the object. Find the focal length of mirror
Saturday, September 10, 2016 by Aashutosh

Science
water is flowing through a horizontal pipe of varying cross section at any two places the diameters of the tube are 4cm and 2cm if the pressure difference between these two places be equal to 4.5cm then determine the rate of flow of water in the tube
Saturday, September 10, 2016 by Tanya

Science
Draw a circuit diagram of a containing two cells in series, a closed switch, three identical light bulbs in parallel.
Saturday, September 10, 2016 by Pholelwa

Science
Draw a circuit diagram of a circuit containing two cells in series, a closed switch,three identical light bulbs in parallel
Saturday, September 10, 2016 by Pholelwa

Science
1. A study was done to find if different tire treads affect the braking distance of an Army Jeep. The same road surface was used each time. Independent variable: Tire Treads Dependent Variable: Braking Distance 2. An experiment was performed to determine how the amount of ...
Friday, September 9, 2016 by Plz check my answers!

Science
How much mL of dilute nitric acid is needed to add in control solution in chloride limit test in sodium hydroxide sample???can u please give me Answer urgently??
Friday, September 9, 2016 by Palakpatel

Science
How much mL of dilute nitric acid is needed to add in control solution in chloride limit test in sodium hydroxide sample according to japanese pharmacopia??can u please give me Answer
Friday, September 9, 2016 by Palakpatel

science
What is , a quarter after four in digital form.
Friday, September 9, 2016 by Connie

Science
One:the sI unit measure for length the meter-would be most appropriate when Two:The metric System Of measurement is based on the number Three: Scientists use SI because it allows them to compare data and communicate with each other about their results (true/False ~Mia
Friday, September 9, 2016 by Mia

Science
A body is moving with uniform accelaration goes 65 meter 5th second and 105 meter in 9th second. How far will it go in 20th seco d
Friday, September 9, 2016 by kabak tamo

NAVL Science (help)
The USS Ronald Regan's (CVN 76) barometer reads 30.14 in-hg. A vacuum gage at the port main condenser reads 18.25 in-Hg. What is the pressure relationship for this gage? What is the absolute pressure, in Psia, for the port main condensor?
Thursday, September 8, 2016 by Ashley

science
lighting is actually an enormous display of the concept of?
Thursday, September 8, 2016 by nisha

Science
in science, skepticism means coming up with inventive way to solve a problems or produce new things
Thursday, September 8, 2016 by Mia

science
1. a stream of water will bend toward a balloon that has been rubbed on a sweater to generate static charge. Which property of water is responsible for this behavior? A. THE polarity of the water molecule b. the ability of water to form hydrogen bonds with itself c. the heat ...
Thursday, September 8, 2016 by oto

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