My science fair project is growing bacteria from food that is left out and seeing how much the bacteria increases over time. How would I write my hypothesis?
192,012 results, page 86

Chemistry
N2+3H2<>2NH3 Decreasing nitrogen: Increases or decreases hydrogen? Increases or decreases ammonia? Decreasing hydrogen : Increases or decreases nitrogen? Increase or decreases ammonia? 
art
Hi i need some help with my art project. I know what i have to do and how to research but i have just gone blank when trying to think about what to do. I've been given 2 headlines, one which goes at the beginning of a sequence and one at the end. They are ''anything you can do... 
Physics
When railroad tracks are installed, gaps are left between the rails. Each steel rail is 8.0m long and has a crosssectional area of 0.0020m^2. On a hot day, each rail thermally expands as much as 4.0mm. If there were no gaps between the rails, what would be the force on the ... 
Computer Science
0 down vote favorite I have to print: Ain't no sunshine when she's gone It's not warm when she's away. Ain't no sunshine when she's gone And she's always gone too long Anytime she goes away. How would I used methods to print these no loops? Would it be something like this: ... 
english
How do i make an outline? From Lord of the Flies, i need to make an outline of one page. this one: The boy with fair hair lowered himself down the last few feet of rock and began to pick his way toward the lagoon. Though he had taken off his school sweater and trailed it now ... 
physics
A system undergoes a twostep process. In the first step, the internal energy of the system increases by 368 J when 144 J of work is done on the system. In the second step, the internal energy of the system increases by 24 J when 248 J of work is done on the system. (a) For ... 
Stats
5. The board of directors for Procter and Gamble is concerned that only 19.5% of the people who use toothpaste buy Crest toothpaste. A marketing director suggests that the company invest in a new marketing campaign which will include advertisements and new labeling for the ... 
Chemistry
Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to include states for the ... 
physics
A proton resistor spring system in a magnetic field going out of the page has a mass of proton 1.67*10^27 kg, a spring constant k=500 N/m and the resistor has r=5Ω. The magnetic field strength is 0.8T. a) When released from rest, calculate the maximum displacement. b) ... 
Mathematics
A car X left town A for town B at the same time that another car Y left town B for town A, each travelling at constant speed. They met 80 minutes later and car X arrived at town B 36 minutes after car Y reached town A. How long did it take car X to reach town B? 
math
hypothesis testing , this is the example, The company has enjoyed success, and has grown to the current staff of 26 people. There is a perception/rumor in the company that the average pay rate for males is different than the average pay rate for females. It is usually a better... 
Health
Hi I was wondering if anyone knows of any websites that would have facts about pregnancy etc I have to write a report on Facts and Myths of becoming pregnat pregancy etc thanks so much for your help 
Math
When doctors prescribe medicine, they must consider how much the drug’s effectiveness will decrease as time passes. If each hour a drug is 20% less effective as the previous hour, at some point the patient will not be receiving enough medicine and must be given another dose... 
Business Research and writing
Write a short survey (8 to 10 questions) that is related to careers in general, careers in IT, or another occupational topic. Remember, this survey should somehow relate to your final project . Distribute this survey to at least four relatives and/or friends who are at least ... 
Math
Ray wanted to put his tomato plants in rows with the same numbers of plants in each row. He knew that if he planted 5,6, or 7 rows of tomatoes, he would have at least one plant left over. However, his plants could be placed evenly in 8 rows. Which of the following numbers ... 
physics
In cleaning out the artery of a patient, a doctor increases the radius of the opening by a factor of two. By what factor does the crosssectional area of the artery change? 
English
Do you believe in love at first sight? Romeo and Juliet evidently did. The play covers the timespan of only a few days. In this short period of time, Romeo and Juliet fall in love so passionately that they are willing to die if they cannot be together. craft a thesis about ... 
english project
thankyou very much for your help.the noun that I can think of are airconditioner,breeze,celsius,cloud,degrees.And verbs forecast,land, damage, drop, use,should.please see if it is correct. 
Biology
Some of it. Human digestion takes biochemical processes mainly enzyeme reactions) to break down food to extract energy and compounds. The enzyemes we produce are specific to particular bonds and molecules. Some of the food we injest cannot be broken down, such as cellulose, so... 
Math
Roulette is a well known game in which a mechanical device randomly selects one of 38 equally likely numbers. IF a player decides to play by choosing a number, he gains $35 if his number is selected by the device. If any other number is selceted he loses $1. Calculate the ... 
Probability
I would really appreciate if someone could help me out. A test for a certain drug produces a false negative 5% of the time and false positive 8% of the time. Suppose 12% of the employees at a certain company use the drug. If an employee at the company tests positive, what is ... 
Spanish
How would I say "Unhealthy cafeteria food" in spanish? Would it be "comida de la cafetería no saludable"? 
science
i have a project where i have to make a working model of a hot tub. does any one have any idea how to even start? 
psychology
* Take about 15 index cards and a flashlight that is opaque on all sides (so that light shines only through the front) into a very dark room. * Place all 15 cards over the beam of light. * Slowly remove the cards one at a time until you can barely detect the light, and then ... 
English
How can I make a good project for school re. promotion about perfume for example? I must do it on cardboard with pictures and promotional language to market the/a perfume. Your help is much appreciated. Husam 
Discrete Mathematics
A tutor website wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points. It came up with the ... 
Discrete Mathematics
3. A tutoring site wants to see how time spent studying for its content exams affects the ultimate scores. It asked its finite math test takers how much time they spent studying for the exam and compared that data against the final scores out of 60 points. It came up with the ... 
chem
a sealed cylinder of a gas contains nitrogen gas at 1.00*10^3 kPa pressure and a temperature of 20C. They cylinder is left in the sun and the temperature of the gas increases to 50C. What is the new pressure in the cylinder? 
chemistry
A sealed cylinder of gas contains nitrogen gas at 1.00 ✕ 103 kPa pressure and a temperature of 28°C. The cylinder is left in the sun, and the temperature of the gas increases to 50.°C. What is the new pressure in the cylinder? 
Science
Suppose you are on a ship somewhere in the Atlantic Ocean. You take sightings on Polaris and find that it's altitude is 52 degrees. You're told that a certain star is on the prime meridian at midnight Greenwich time. This star is on your meridian at 4 A.M G.M.T What is your ... 
Algebra
Write an equation for the translation so the graph has the given vertex. 1. y=x vertex (5,0) 2. y=2x vertex (4,3) 3. y=x vertex (p,q) I really have no idea how to even begin these, but I do know the answer to # 2 is y=2x+11 and #3 is y=xp+q Thanks in advance. ... 
english
13. He did not think the bicycles would make it over the mountains, being so old. * The bicycles being so old .He did not thing it would make it over the mountains. please check my dangling and misplaced modifiers 
To Writeacher
Writeacher. Could you please edit this for me, and point out all grammatical errors. Thank you very much in return :) Mr. Henry Axhelm Math Period 2, Room 107 I teach five classes a day, Not students, just classes. No sense getting involved With their personal problems. ... 
english
Fill in the blank with correct option 1.Watchthe milk;don't let it boil . a.No preposition required,down b.No preposition require,over c.over,up d.over,over 
math
Hello, and thank you in advance for your help! I'm writing on behalf of my daughter in 6th grade, who was crying last night about a project that's due tomorrow (Wednesday). For Math, she's supposed to choose her favorite number (16) and create a "project" highlighting the ... 
journal
Seeing pulsation of the artery at the completion of this dissection. 
Physics
On a playground slide, a child has potential energy that decreases by 1000 \rm J while her kinetic energy increases by 900 \rm J. What other form of energy is involved, and how much? 
Chemistry
I can't figure out a clear way to write out the formatting of the question, but here is a picture. Any help is greatly appreciated. the image is on the website imggur and then then after imgur dot com its /Cus8o 
physics
How much work does the electric field do in moving a proton from a point with a potential of +120 V to a point where it is 60 V? Express your answer in joules. I've looked through my notes, and I'm sure the answer is really easy, but I'm not seeing it. I know that Work(Wba)= ... 
Comment
I am a freshman in college and this is the first time I have received help over the internet. I have been using this site for a couple of days now and all I have to say is that this site is great! I would like to say thanks to all the "helpers"! We are here to help. All are ... 
Physics
If the polevaulter were to land on concrete rather than on a cushion, the impulse that stops the fall would be what? A) Greater because of the rigidity of the concrete. B) Greater because of the force of impact is greater. C) The same because impulse is the change in momentum... 
History
How do Armenians view the events that brought about the deaths of over 1.5 million Armenians in 1915? A.The deaths were caused by accidental bombardments of civilian targets. B.The killings were committed by rogue generals who disobeyed orders. C.The deaths were mostly the ... 
Chemistry
1. What does 'the time taken to reach completion decreases if 20cm^3 of hcl containing 4mol/dm^3' means? How to work out to find the concentration? 2(a)What does concentrated hcl means? (b)What does dilute hcl means? Which will react faster or slower / a or b? Thanks sooooo ... 
Maths
Steve  you answered this question earlier for someone else and gave them the formula for how to answer it. I have the same problem in my homework and have used the formula you gave, but have got an answer that does not appear in the answer options. I got 12.75 Would you be ... 
Maths
Steve  you answered this question earlier for someone else and gave them the formula for how to answer it. I have the same problem in my homework and have used the formula you gave, but have got an answer that does not appear in the answer options. I got 12.75 Would you be ... 
Physics
For a winter fair, some students decide to build 30.0 kg wooden pullcarts on sled skids. If two 90.0 kg passengers get in, how much force will the puller have to exert to move the pullcart? The coefficent of maximum static friction between the cart and the snow is 0.15. 
MATH!
5x^27xy+12y^2 _______________(OVER) x^2+xy20y^2 Please if anyone can help in the steps to answer this...i would be greatful.=) What is a reflex angle Are you sure you copied the question correctly? If the top is 5x^217xy12y^2 it works out really easily. The way it stands, ... 
statistics
Could someone work a problem like this one, for an example. Complete the hypothesis test with alternative hypothesis ìd < 0 based on the paired data that follow and d = M  N. Use á = 0.02. Assume normality. M 49 67 45 57 57 48 N 57 68 47 60 64 55 (a) Find t. (Give your ... 
math
Ryan has nine 14ounce bags of pop corn to repackage and sell at the school fair. A small bag holds 3 ounces. How many small bags can he make? 9*14=126 126/3=42 I need to know if there is a longer version to this answer or is this the only way it can be worked out? 
Statistics
Let’s continue our analysis of liberals and conservatives, taking a look this time at differences in their educational attainment. We obtain the following information from the 2002 GSS – the average educational attainment for liberals is 13.90 years (SY = 3.27) and the ... 
calculus
can someone also help me ndertsand this question ; y=x^3 +2x^2+3 represents the rate of an object over the interval [7, 10]. What is the average rate of the object over the time interval? 
English
I rethought them all. Thank you very much. 1)The following morning he is very polite to the old man and continues to carry out his duty asking the man how he has spent the night. 2)At 4 a.m., just when he has finished his work, the narrator answers a knock at his front door. ... 
budgeting
A. She should scrap her present budget and start all over again. B. It is clear that Lisa is just one of those people for whom budgeting is impossible. She should give up on the idea. C. She should make adjustments in her foodbuying habits and/or look for ways to trim other ... 
im back : )
I have a bunch of questions i hope someone could help me with? #1 what is the fifth term in this series? 4 1/2; 8 3/4; 13; 17 1/4 ? I know it is 21 1/2... but how to i figure that? #2 a manufacturer has 3,375 yards of material on hand. If the average dress takes 3 3/8 yards of... 
English
Writeacher, I left out these sentences on the same topics. I included various possibities. Thank you. 1) Sorry, I’ve been out of touch. (Sorry, I haven’t been in touch is the same? How are things with you? Any good news? I’ve been busy with my mum recently since she was ... 
Math
Matt spent 7/10 of her money to buy a kettle. The kettle cost $56. How much money did she have at first? How much did she have left? 
algebra
A local salesman receives a base salary of $900 monthly. He also receives a commission of 7% on all sales over $1000. How much would he have to sell in a month if he needed to have a monthly income of $2900? 
Physics
A tennis player hits a tennis ball (m = 0.0550 kg) with a force of 32.2 N over a time interval of 0.22 s. If the ball as a velocity of 42.2 m/s before being hit and 87.8 m/s after being hit, how much work did the tennis player do? 
Science
This graph shows the changes in two populations of herbivores in a grassy field. In the y axis it says number of organisms in the x axis it says Time In the graph A is decreasing , B is increasing, At first they were steady then slightly A decreased and B increased . A ... 
Chemistry
Suppose that a stable element with atomic number 119, symbol Wr, has been discovered. (a) Write the groundstate electron configuration for Wr, showing only the valenceshell electrons. (b) Would Wr be a metal or a nonmetal? Explain in terms of electron configuration. (c) On ... 
MAth
Describe the values for x that may not be appropriate values even when they are defined of your classmates’ function.A function could, for example, indicate the amount of bone strength (y) in a living human body over time in years (x). It would not make sense to look at ... 
MATH
IF YOU HAD TO GET A 21.1 GRADEPOINT OUT OF 215 QUSTIONS HOW MAY WOULD YOU HAVE TO GET RIGHT English: 75 Math: 60 Reading: 40 Science: 40 Total: 215 
MATH
IF YOU HAD TO GET A 21.1 GRADEPOINT OUT OF 215 QUSTIONS HOW MANY WOULD YOU HAVE TO GET RIGHT English: 75 Math: 60 Reading: 40 Science: 40 Total: 215 
Environmental science Project
Provide at least three freshwater and three ocean water resource challenges by filling in the following table. Then respond to the question that follows 
English
I left out the following sentences. Thank you very much. 1) Dorian, however, is at best charming but at times enjoys hurting the artist. The adoration that Basil feels for Dorian is a disturbing mixture of terror and sorrow. 2) He was aware of gaining something from the ... 
Math
LaQuisha has a sprinkler that waters a circular area. The diameter of the area that the sprinkler waters is 20 feet. The actual sprinkler is located at the origin of the coordinate plane. Write an equation that describes the circumference of the circular area that the ... 
HELP! INTRO TO ECO
Why do supply curves slope upward from left to right? Why don't we sometimes draw them sloping downward from left to right? Under what conditions would it be sensible to draw a supply curve that is horizontal(perfectly elastic)? Under what conditions would it be sensible to ... 
math
The amount collected per month from a consumer of electrical power consists of two parts a fixed charge for providing the service and a variable charge which is directly proportional to the number of units of power consumed. An amount of Rs. 700 is collected from the consumer... 
SCIENCE/MATH
Land growing continuous grain corn as a cash crop loses soil at a rate of 14.0 metric tonnes ha1 yr1. This is a fertile soil, which has an organic matter content of 3.8% and nitrogen content of 0.35% (both by mass). a)Calculate how long it will take to erode the entire Ah ... 
English help
From the words below, supply the words needed to complete the sentences. Chronic, clairvoyance, inadvertent, pretentious, celestial, vanguard. A. John had a CHRONIC back pain that left him bedridden. He refused, however, to visit the doctor because of the PRETENTIOUS way the ... 
math check
Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n = 19 and á = 0.01. F = 5... 
Feedback Control
The goal of this project is to model the longitudinal motion of a Segway and design a PID controller for it. The model must include the dynamics of the inverted pendulum on two wheels, as shown on Figure 1 (left), and the model of the DC motors (same as ) that actuate the ... 
English
Which phrase from Marge Piercy's "To Be Use" best illustrates the poem's celebratory tone toward hard work? I want to be with people who submerge in the task, who go into the fields to harvest and work in a row and pass the bags along, who are not parlor generals and field ... 
English
Could you please check these sentences for me? Thank you very much for your invaluable help. 1) I find it difficult to translate the following description into English since I don't know how old the students are in their fifth or sixth class. How old are the students attending... 
Math
On Monday, Casey ran 5 miles. On Tues, she ran three and three fifths miles. How much further did she run on Mon than Tues? Then, on Wednesday she ran four and one half miles. How much further did she run on Wed than on Tues? Could someone show me how I would figure this out? ... 
English
Crossing the Sea A verdant rain forest rises out of the ocean to snowcapped peaks. Powerful fiords snake their way into glacial valleys. Rivers roar and meadows blossom. Many consider the land of New Zealand to be among the most beautiful places on Earth for centuries that ... 
English
Crossing the Sea A verdant rain forest rises out of the ocean to snowcapped peaks. Powerful fiords snake their way into glacial valleys. Rivers roar and meadows blossom. Many consider the land of New Zealand to be among the most beautiful places on Earth for centuries that ... 
Science
When a chemical reaction is carried out in an industrial setting, it is very common to have one of the reactants present in an excess amount above the stoichiometric quantity that would be needed for the reaction. Why? 
finance
New project analysis You must evaluate a proposal to buy a new milling machine. The base price is $108,000, and shipping and installation costs would add another $12,500. The machine falls into the MACRS 3year class, and it would be sold after 3 years for $65,000. The ... 
physics
i do not get this question at all and if u could help it'd be a real HUGE help. solve these equations (sorry i do not have the symbols so i will just write the words out. sorry again for any inconveniance. ): time= 2pi x squareroot of length/gravity ....i know it my seem very ... 
grammar
i really don't understand these sentences.... the instructions are to edit the following sentences to eliminate problems with s and ed verb forms and with omitted verbs, if a sentence is correct, write correct after it. ,,,, Sentence one: Have there ever been a time n your ... 
Math
Here's a couple examples from my homework. If someone could help me solve this by showing me step by step what to do, it would be so great. Also, any websites that would show me the steps too. Thanks so much. I have to get all my work done by tomorrow and I'm kinda freaking ... 
chemistry urgent
if 100 g of iron were reacted with 100 g of oxygen according to the reaction below, the maximum yield in grams of Fe2O3 would be: chemistry urgent  bobpursley, Tuesday, November 30, 2010 at 4:20pm Balance the equation. Note the coefficents on Fe and O2, that is the mole ratio... 
English
1. Search the following topics on the Internet, and then fulfill/do the project. Write the addresses of foreign shopping sites after you find them. Chosse the items you want to buy and write down the names and prices. On which item did you spend the most? Using the following ... 
English
Please check. I. Correct any errors in the following sentences. Do not use different verbs (for example, “recline” instead of “lie down”). Provide the correct form of the verb given: 1. Yesterday I let my students lay down for a nap, but most of them preferred to set ... 
Calc2
A) A ball is dropped from "M" meters above a flat surface. Each time the ball hits the surface after falling a distance, h, it rebounds a distance d, where 0<r<1. Find the formula that represents the total distance the ball travels up and down. B) Use the formula in part... 
Economics
Hopefully you can help me and I need this ASAP. I need this by tomorrow in the morning. You answer the questions if it decreases increases, expands or not. Also, can you explain it too? This are what if situations. Don't answers don't have to be in depth. Just short and to the... 
math
Jason is trying to make picnic lunches.He has 12 sandwiches, 18 apples and 30 pieces of candy.How many lunches can he mmake if he wants each lunch to have the same number of each kind of food and use all of the food? 
using skills
Which of the following is necessary for the learning of health and nutrition concepts? A. Learning cycle lessons B. Concrete experiences C. Skeletons and other models D. Food from the four food groups my answer is d. 
Physical science check my answers
5. Steve's older brother got this cool new car. He said it can go from a stopped position to 80 miles per hour in ten seconds. His brother is describing the car's A. acceleration. *** B. average velocity. C. instantaneous speed. D. average speed. 6. Radar devices are used by ... 
Science
Proteins found on the outside of cells and viruses are called ____________ , these are used by the body to _______________ pathogens. antigens; help antibodies; make antigens; identify antibodies; reproduce Identify the response below that summarizes the correct sequence of ... 
english essay help
hi,in my english class, we had to read an article about a girl who attended stanford. she went for an interview and had trouble filling out the forms. she thinks that colleges don't offer classes that help kids in real life situations. for example, she thinks colleges need to ... 
physics
A motorist has to travel 3.50 km in a city with an average speed not exceeding to 25 km/h . If the average speed increases to 40 km/h. What is time he will gain from his journey 
Religions of the World
How has modern civilization impacted the spiritual lives of the indigenous people? Are indigenous religions still practiced today? If so, how have the practices changed over time? This is an extremely broad set of questions. There are indigenous peoples all over the world. You... 
Math
Mylaw is a recent startup trying to cater to customers in search of legal services who are intimidated by the idea of talking to a lawyer or simply too lazy to enter a law office. Unlike traditional law firms, Mylaw allows for extensive interaction between lawyers and their... 
math
Mark's house is 90 miles away from New York. You travel 15 miles on city streets, and then 75 miles on the highway. a. your average speed is 25 miles per hour in the city and 60 miles per hour on the highway. Use the formula time=distance/rate. How much time will you spend ... 
Physics
You pull a simple pendulum of length L to the side through an angle of 3.50 degrees and release it. How much time does it take the pendulum bob to reach its highest speed? How much time does it take if the pendulum is released at an angle of 1.75 degrees instead of 3.50 ... 
Science
Duckweed is a small plant that grows in water Many waterbirds depend on duckweed for food Duckweed can reproduce rapidly in water that is rich in the nutrients used in agriculture. Which of these human activities would most likely cause an overgrowth of duckweed in a pond ... 
English
I would for you to overlook my narrative essay, for corrections and your advice. The essay is not finished, but would like to know am I on the right path. A Painful Moment It was the summer of 1998; I was twenty years old celebrating the 4th of July with my brother the day ... 
English
To assure the Writing Process is complete, the author must A. revise B. project C. compile I would say it's A, right? Thanks for checking.