A family is planning to build a raised planting area using a blend of peat moss, mulch, and a rich organic soil in which to grow the plants. they have been told first to place on the ground a layer of material that will allow for a proper drainage each time the plants are ...
Tuesday, September 20, 2016 by Jen
In a home's central heating system when the room temperature measured by thermostat reaches a set value, the thermostat sends a message to the heater, and the heater switches off. These actions are an example of: A. a model. B. feedback. C. input. D. A process Is it B?
Tuesday, September 20, 2016 by Micheal
You are sitting in a rowboat on a lake, watching waves created by a passing motorboat. If you count 4 crest pass every second, and the crests are 5 feet apart, what is the speed of the water waves?
Tuesday, September 20, 2016 by India
URGENT Candice and Dino operate computer repair services. For a service call, candice charges 40 and dino charges 50, in addition, they each charge an hourly rate. Candice for 35/hr and Dino for 30/hr . One day their charges of two service calls were the same, what did they ...
Tuesday, September 20, 2016 by Danielle
Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered why there were so few young hemlocks. By reading the records that...
Tuesday, September 20, 2016 by Kay
2. Your friend John complains about his poor grades. You go to his house to study one day. The only place John has to study is at the kitchen table. While you are there, his younger brothers run through the kitchen screaming over and over again. What advice would you give ...
Tuesday, September 20, 2016 by Tila strong
A train starts from rest and attains a speed of 15 m/s in 10 seconds and produce acceleration of 2.5 m/s (square) it stops in 6 seconds after the breaks apply find the distance covered by train
Tuesday, September 20, 2016 by Anonymous
What will be the effect on the colour of blue litmus paper when it is dropped in each of the following solution. 1. Water 2. Lime juice 3. Dilute hydrochloric acid 4. Sodium hydroxide solution.
Tuesday, September 20, 2016 by soloon
A compound is made up of two elementsA and B,has A=70%,B=30%.The relative number of moles of Aand B in the compound are 1.25 and 1.88 respectivily.If the molecular mass of the compound is 160g.Find the molecular formula of the compound?
Tuesday, September 20, 2016 by Arunvenukumar
The volume of a gas increases from 18.7 m3 to 25.1 m3 while the pressure changes from 1.82 atm to 1.41 atm. If the initial temperature is 353 K, the final temperature of the gas is K.
Monday, September 19, 2016 by nana
1: Which statement best describes the framework of government established by the constitution?(1 point) > The three branches of government defer the Majority of power to the states >a system of checks and balances keeps each of the three three branches from having too ...
Monday, September 19, 2016 by Lexi
THANK YOU DRWLS. I just wanted to thank you because you have been a major part of my successes in High school. Your answers are always clear, easy to understand, and most importantly correct! I just wanted to expresses my gratitude as you are truly the MVP of Jiskha. I'am ...
Monday, September 19, 2016 by BlueishLocket
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
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
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
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
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 cant be split into smaller pieces and that attach ...
Sunday, September 18, 2016 by None Of Your BIzz
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
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
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
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
A remote controlled car. My 11 year old grandson, Danny, got a remote controlled car for his birthday. His older brother, Jay, has a set of physics tools, including a sonic ranger. Jay is a computer jockey and has figured out how to make the sonic ranger program show any ...
Thursday, September 15, 2016 by Sandra
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
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
which of these actions would most help a worker improve their productivity? A: Finding a new job in a different field. B: Taking a training course related to her job. ****** C: Buying a laptop computer for home use. D: asking her employer to give her a raise. The answer is B, ...
Thursday, September 15, 2016 by Kyle
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
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
flammability is a materials 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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