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September 3, 2014

Homework Help: Science

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Recent Science Questions

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Science
4) Why is it important to control the presence ethylene gas when ripening fruit? 5) Describe two aspects of dams that depend on the proper flow of fluids. Please help me with these questions! A.s.a.p thanks Answer this Question
Sunday, January 12, 2014 at 11:13am

science
4) Why is it important to control the presence ethylene gas when ripening fruit? 5) Describe two aspects of dams that depend on the proper flow of fluids. Please help me with these questions! thanks
Sunday, January 12, 2014 at 7:53am

Science
The bacterium Caulobacter crescentus is able to form long cell envelope extensions that increase the surface area-to-volume ratio when placed in adverse environments. What is the likely function of these envelope extensions? To acquire nutrients To aid in cell division To ...
Saturday, January 11, 2014 at 10:38pm

Science
Which of the following best describes an aspect of a membrane's molecular structure that causes it to be selectively permeable? Carrier proteins on either side of the membrane slow the traffic of large molecules into the cell. Nonpolar molecules cannot dissolve in the ...
Saturday, January 11, 2014 at 10:38pm

Science
Which of the following would not be affected by a loss of vacuole function? The export of unwanted substances The production of ATP>>>>>>? The regulation of cellular pH The storage of food materials
Saturday, January 11, 2014 at 10:37pm

Science
Ms.Sue would you mind checking my answer? Question~ What make sit possible for plants to complete photosynthesis? ________________________________________​_ My Answer~ For plants to complete photosynthesis they need water,carbon dioxide and light.
Saturday, January 11, 2014 at 9:35pm

Atomic Model/Science
A particular neutral uranium atom has 92 protons,143 neutrons, and an atomic mass of 235. How many electrons does the atom have?
Saturday, January 11, 2014 at 5:17pm

Science
How does gravity keep the planets in motion around a star?
Saturday, January 11, 2014 at 5:12pm

Science
Would Mosquito Larvae be considered an insect?
Saturday, January 11, 2014 at 4:21pm

science check my answers?
A car travels around a circular turn of radius 50 meters while maintaining a constant speed of 15 m/s. Find the minimum value for the coefficient of friction necessary to keep the car on the road. I got .40 for the minimum value of friction. In icy conditions, the coefficient ...
Saturday, January 11, 2014 at 2:48pm

Science
Are Mosquito Larvae decomposers?
Saturday, January 11, 2014 at 1:32pm

science
Is a bluegill both a decomposer and consumer?
Saturday, January 11, 2014 at 12:18pm

science please check my answer
A boy climbs to the roof of his house and drops a 0.40 kg rubber ball from the 7.5-meter peak of the house. How much energy was lost in the process? So I got 48 J is this correct? The bounce takes place over a 170 ms time interval. What is the impulse given to the ball during ...
Saturday, January 11, 2014 at 8:06am

science
A boy climbs to the roof of his house and drops a 0.40 kg rubber ball from the 7.5-meter peak of the house. How much energy was lost in the process? The bounce takes place over a 170 ms time interval. What is the impulse given to the ball during this time?
Friday, January 10, 2014 at 11:01pm

Science help !
Thanks for all who has been helping (Ms.sue)and more !! I couldnt remember all the name just that ms.sue! If changing conditions lead to decreased oxygen levels in this stream,the carrying capacity of the stream for the trout will decrease.Oxygen level in water is therefore an...
Friday, January 10, 2014 at 7:37pm

Science help
Im trying to finish my study guide so i can study this weekend but i have more problems like this and i dont have a clue of what they mean Fertilizers and perticides applied to farm fields in pennsylvania have made their way down into the chesapeake bay in maryland.this is an ...
Friday, January 10, 2014 at 7:21pm

science help!
A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). If the satellite has a mass of 1500 kg, what is the force of gravity acting on it?
Friday, January 10, 2014 at 7:12pm

Science help
Im trying to finish my study guide so i can study this weekend but i have more problems like this and i dont have a clue of what they mean By switching from fossil fuels to solar,wind,hydroelectric,and other renewable sources of energy,humans can _____ the trends in ...
Friday, January 10, 2014 at 6:55pm

science please check my answer
A mass is moving in uniform circular motion under the effects of a centripetal force. If the force is doubled and the radius is cut in half, by what factor will the speed change? It will double. <---- It will be cut in half. It will not change. It will quadruple. It will be...
Friday, January 10, 2014 at 6:45pm

Science question
_________ is a solid fossil fuel that forms from plant remains. Coal Hydrocarbon Natural gas Petroleum I think it's C.
Friday, January 10, 2014 at 3:10pm

science(check ansers)
1.which of the following could be true of two different species that have a competive relationship in the same ecosystem? A.one species preys on the other B .the relationship is mutually beneficial. C.They share the same niche D.one species benefits, while the other is neither...
Friday, January 10, 2014 at 3:05pm

science(CHECK ANSWERS)
hi,can someone check my science work...and please label like this 1.right 2.wrong thank you 1.which of the following could be true of two different species that have a competive relationship in the same ecosystem? A.one species preys on the other B .the relationship is ...
Friday, January 10, 2014 at 2:33pm

More Science
Why is biodiversity ecologically valuable? a.)It provides humans with food and shelter b.)It is reliable source of venue c.)It establishes the foundation for food chains and food webs d.)It provides raw materials for clothing and medicine My answer is C.
Friday, January 10, 2014 at 1:16pm

Science
Why is freshwater a limited resource? A. because most water on Earth is in lakes B. because most water on Earth is in clouds C. because most water on Earth is in the ground D. because most water on Earth is saltwater D
Friday, January 10, 2014 at 1:14pm

Science
An object with a mass of 58.2 kg is accelerated by a force of 320 N. What is the acceleration of that object?
Friday, January 10, 2014 at 1:14pm

Science
Which compound causes the depletion of Earth's ozone layer? A. ultraviolet radiation B. chlorofluorocarbon C. carbon dioxide D. sulfuric acid B How does a nuclear power plant produce energy? A. through solar panels B. through nuclear fission reactions C. through geothermal...
Friday, January 10, 2014 at 1:11pm

Science
Which of the following reduces water pollution? A. building more coal mines B. creating more paved surfaces C. using more biodegradable products D. using more fertilizers in farming C?
Friday, January 10, 2014 at 12:56pm

Science
Koalas, which are native to Australia, primarily eat the leaves of the eucalyptus trees in which they live. Which of the following would happen to koalas if people destroy their habitats in order to build houses? a.)The koala population would increase significantly b.)The ...
Friday, January 10, 2014 at 12:55pm

Science
A commissioner wants to reduce the amount of waste sent to the landfill. Which of the following would result in the greatest reduction of waste? A. composting food waste B. recycling glass, plastics, and metals C. reusing rubber, leather, and textiles in new products D. ...
Friday, January 10, 2014 at 12:44pm

SCIENCE
Which of the following activities has a negative impact on biodiversity? a.)Regulating hunting b.)Establishing wildlife preserves c.)Buying a fuel-efficient car d.)Cutting down trees in rain forests to build more houses.
Friday, January 10, 2014 at 12:42pm

Science
Which of the following ways is the most effective to preserve biodiversity? A. captive breeding B. habitat destruction C. habitat preservation D. habitat fragmentation C?
Friday, January 10, 2014 at 12:31pm

IPC-Science
The specific heat of gold is 0.031 calories/gram°C. If 10.0 grams of gold were heated and the temperature of the sample changed by 20.0°C, how many calories of heat energy were absorbed by the sample? 6.2 calories 0.016 calories 6,451 calories 0.062 calories
Friday, January 10, 2014 at 10:02am

Science
What is the difference between photosynthesis and cellular respiration?
Friday, January 10, 2014 at 6:55am

Science
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 children’s’ playground...
Friday, January 10, 2014 at 12:47am

Earth science
In a few sentences, explain how information from paleoglaciation and paleomagnetism support the idea that continental plates have moved over the past several million years.
Friday, January 10, 2014 at 12:00am

physical science
A car travels through a school zone at a speed of 36 m/s was the 45 mi/h speed limit exceeded? yes or no
Thursday, January 9, 2014 at 8:07pm

science
write T if the statement is true or F if it is false. a.)All the planets travel around the sun at the same speed.my answer is T. b.)The sun's gravity keeps the planets in orbit around it. my answer is F. c.)There is an asteroid belt between Jupiter and Saturn.my answer is ...
Thursday, January 9, 2014 at 7:52pm

history
Three laws of planetary motion developed by Johannes _______ advanced the science of _______.
Thursday, January 9, 2014 at 6:49pm

Science
What equipment is necessary for wind energy?
Thursday, January 9, 2014 at 6:36pm

Science
Hannah is comparing a rock from a riverbed and a rock from deep underground. One is very smooth, and the other has very rough edges. Explain why each rock was probably found in that location.
Thursday, January 9, 2014 at 4:16pm

Science
The mass of rock and soil directly deposited by a glacier is called • erosion. • till. • load.
Thursday, January 9, 2014 at 4:15pm

Earth Science
The Rocky Mountains are more jagged than the Appalachian Mountains. This suggests that • erosion has worn down the Appalachian Mountains more than the Rocky Mountains. • the Rocky Mountains are older. • the Appalachian Mountains are more likely to experience ...
Thursday, January 9, 2014 at 4:09pm

Science
9. How does conservation plowing help limit the destruction of soil? (1 point) • by rotating crops, removing moisture, and holding soil in place • by returning soil nutrients, retaining moisture, and holding soil in place • by rotating crops, retaining moisture...
Thursday, January 9, 2014 at 3:56pm

Science
I have a project in which I design a house that runs completely on renewable energy sources. When I put in solar energy, the batteries are said to use the sun's light and store the energy for later use. My question is if those batteries have some kind of fossil fuels in ...
Thursday, January 9, 2014 at 2:31pm

Science
How to complete SWOT analysis of a sea turtles?
Thursday, January 9, 2014 at 12:39pm

Science -- I can't find my original post...
In a closed room with an electric system controlled by a thermostat, would hanging a load of laundry to dry in that room require the system to work harder to maintain the temperature of the room?
Thursday, January 9, 2014 at 12:28pm

science
Through what processes can metamorphic rocks and igneous rock change into a sedimentary rock ? a) cooling of lava b) weathering,deposition, and erosion c) cementation and compaction d) heat and pressure
Thursday, January 9, 2014 at 7:54am

Science
What is the source of the magma that fuels the island arc complex?
Wednesday, January 8, 2014 at 11:04pm

Science help urgent :/
I need to help my brother with this, he waited till the last minute to complete his homework... 1. _________ is a solid fossil fuel that forms from plant remains. Coal Hydrocarbon Natural gas Petroleum 2. Air pollution can be controlled by permitting more storm runoff. burning...
Wednesday, January 8, 2014 at 10:45pm

Science
What are some easy facts and characteristics about a rotation?
Wednesday, January 8, 2014 at 10:14pm

Science my last question
Sorry for all the questions! What would population and community be in a home or neighborhood?
Wednesday, January 8, 2014 at 7:30pm

Science
Would a pond or garden be an abiotic factor in a neighborhood?
Wednesday, January 8, 2014 at 6:46pm

Please i needd an answer asap!!!
I give medals and 'best answer' :) I need help asap! Which of the following is one way to assess whether or not a learning game is effective? a. Being able to win the game b. doing a quiz before and after the game to see what you have learned c. Making it difficult to ...
Wednesday, January 8, 2014 at 6:33pm

SCIENCE HELP PLEASE
Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*
Wednesday, January 8, 2014 at 5:59pm

Science
What would be the effect on the seasons and the northern and southern hemispheres if Earth were not tilted? Explain your answer. *PLEASE HELP ME*
Wednesday, January 8, 2014 at 5:55pm

Science Please HELP!!!
Which of the following are structures that rely on capillaries for exchange or movement of small molecules? 1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2
Wednesday, January 8, 2014 at 5:53pm

Science Please HELP!!!
Which of the following are structures that rely on capillaries for exchange or movement of small molecules?
Wednesday, January 8, 2014 at 5:41pm

Science
Do power inverters run on energy from fossil fuels?
Wednesday, January 8, 2014 at 5:01pm

Science
What are some backup systems for solar power other than batteries?
Wednesday, January 8, 2014 at 4:47pm

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 4. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
Wednesday, January 8, 2014 at 3:10pm

SCIENCE HELP PLEASE
3. Which of the following methods of reporting research is not followed by most scientists? (Points : 1) publishing a research paper online publishing a research paper in print holding a press conference presenting a talk at a meeting Question 4. 4. Who decides whether a paper...
Wednesday, January 8, 2014 at 3:04pm

SCIENCE HELP PLEASE
3. Which of the following methods of reporting research is not followed by most scientists? (Points : 1) publishing a research paper online publishing a research paper in print holding a press conference presenting a talk at a meeting Question 4. 4. Who decides whether a paper...
Wednesday, January 8, 2014 at 2:58pm

Science check answers please and quickly
1. Jim is doing a physics experiment on the rate of cooling of solid objects in air. Which of the following is a variable that is not directly part of his experiment, but should be controlled in his experiment? (Points : 1) initial temperature to which he heats the solid ...
Wednesday, January 8, 2014 at 12:10pm

Science
Which aspect of Einstein's theory of special relativity was testable? the postulates only the postulates and the predictions the predictions only none of the aspects
Wednesday, January 8, 2014 at 11:05am

Science check my answer please
In a famous letter to Robert Hooke, Isaac Newton wrote, "If I have seen further it is only by standing on the shoulders of giants." Which of the following does this quote best demonstrate? (Points : 1) the cumulative nature of modern knowledge of physics how ...
Wednesday, January 8, 2014 at 10:48am

science
__________ rocks forms when a rock is changed by heart,pressure, or chemical reactions. a) Igneous b) Sedimentary c) Metamorphic d) Chemical
Wednesday, January 8, 2014 at 4:08am

science
Eli 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
Wednesday, January 8, 2014 at 4:04am

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon C? 2. Which of the following statements best describes chemical weathering? A. It happens only in cool environments. B. It's the type of weathering in which rocks and ...
Tuesday, January 7, 2014 at 10:41pm

Science
The terms diffusion and osmosis seem to have similar meanings. Explain how they are similar. Then give reason why scientists use two separate term.
Tuesday, January 7, 2014 at 10:17pm

Biology
Identify/ name at least 1 biological science problem and prepare a procedure on how to solve such problem then recommend solution.
Tuesday, January 7, 2014 at 9:44pm

Biology
Why is there a need for a scientist to know the limitations of Science?
Tuesday, January 7, 2014 at 9:38pm

Science
To what extend is it ethical for humans to own genetic material? Please I need help to collect peoples opinions of what they think!!
Tuesday, January 7, 2014 at 7:06pm

english 11
In which sentence is the underlined phrase a prepositional phrase functioning as an adjective? My sister was born in Chicago. She went to boarding school in Coventry. My sister moved away in 2009. Her grades gave my sister a place in the top rank of her class. 7. Read the ...
Tuesday, January 7, 2014 at 6:32pm

english 11
In which sentence is the underlined phrase a prepositional phrase functioning as an adjective? My sister was born in Chicago. She went to boarding school in Coventry. My sister moved away in 2009. Her grades gave my sister a place in the top rank of her class. 7. Read the ...
Tuesday, January 7, 2014 at 6:30pm

physical Science
Calculate the momentum of a 200kg object moving 1m/s and a 1-kg object moving 200m/s?
Tuesday, January 7, 2014 at 5:40pm

Science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support.
Tuesday, January 7, 2014 at 4:45pm

EARTH SCIENCE
1. What measurement best describes the results of a scientific experiment regarding volume? A. 1425 mL B. 5 quarts C. 2 pints D. 125 gallons A? 2. How is the mass number calculated for an element? A. The product of neutrons and protons B. There is no calculation. C. The ...
Tuesday, January 7, 2014 at 1:52pm

SCIENCE HELP PLZZZZZ! ONLY ONE QUESTION!
Which of the following correctly describes how nerve impulses move throughout the body? A. Electrical transmission through neurons and elecrical transmission between neurons. B. Chemical transmission through neutrons and chemical transmission between neutons. C. Chemical ...
Tuesday, January 7, 2014 at 1:27pm

Science check answer quick!
I really do not understand Number 7 Which of these does Newton's law of universal gravitation imply? (Points : 1) The force of gravity between two objects is inversely proportional to the product of the two masses. <-- Earth's gravity acts on people inside a space ...
Tuesday, January 7, 2014 at 12:43pm

science
Eli 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
Tuesday, January 7, 2014 at 12:38pm

SCIENCE HELP! ONLY ONE QUESTION!
Which of the following correctly describes how nerve impulses move throughout the body? A. Electrical transmission through neurons and elecrical transmission between neurons. B. Chemical transmission through neutrons and chemical transmission between neutons. C. Chemical ...
Tuesday, January 7, 2014 at 12:37pm

science
To study a rock sample,geologists observe the rocks mineral,composition,color, and temperature. true or false ?
Tuesday, January 7, 2014 at 12:36pm

science
What altitude would you be at if the air pressure is 0.05 kpa.
Tuesday, January 7, 2014 at 12:25pm

please help me!! with this science!!!!!
Multiple Choice 1. Which sphere of the Earth system contains all living organisms? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following statements best describes the geosphere? (1 point) the sphere that consists of solid rock layers near Earth’s ...
Tuesday, January 7, 2014 at 4:52am

science
A window glass is 0.9 m wide, 1.5 m high and 4 mm thick. During winter, the temperature of the inside face of the window is 10°C, and the outside face is at -9 °C. How much thermal power is being transported through the window? (Kr = 0.84 W/m.K)
Tuesday, January 7, 2014 at 2:12am

science
how can nuclear energy be used for heating and cooling a house?
Monday, January 6, 2014 at 10:53pm

Science
Can energy from wind turbines be used for heating and cooling in a house? If so, please give a website so that I can do some research.
Monday, January 6, 2014 at 9:00pm

Science Need Help like crazy!!!
Hello.I have a question. Do sprouts germinate? Thank you for the help. PLEASE HELP:)
Monday, January 6, 2014 at 9:00pm

Science
he specific heat of gold is 0.031 cal/g°C. Fifty grams of gold will require ____ calories to raise the temperature 1°C. 3.1 6.2 1.55 50
Monday, January 6, 2014 at 7:48pm

Science
Translate into a sentence: 2NaHCO3 --> Na2CO3+H2O+CO2
Monday, January 6, 2014 at 7:43pm

Science
Translate into a sentence: 2NaHCO3 --> Na2CO3+H2O+CO2
Monday, January 6, 2014 at 7:42pm

science... PLEASE HELP!
Is Archaebacteria autotrophic or heterotrophic? Also, is it unicellular or multicellular? I believe it is both autotrophic and heterotrophic and it is multicellular, but I am not sure. Please help!
Monday, January 6, 2014 at 6:19pm

science
which of the following is a quantitative property of minerals ? a) cleavage b) hardness c) luster d) streak which of the following is not a characteristics of minerals ? a) occur in gaseous and liquid state b) formed by inorganic processes c) naturally occurring d) definite ...
Monday, January 6, 2014 at 6:05pm

Science
Does the burning of biomass give out greenhouse gases?
Monday, January 6, 2014 at 6:01pm

Science
How are are the viruses, bacteria, fungi, and protists similar? are the all living things or only visisble to through a microscope or infectious diseases??
Monday, January 6, 2014 at 4:45pm

Science 1 question....
What are the social benefits that traveling into space has for modern society?
Monday, January 6, 2014 at 12:57pm

Science
Compare renewable and nonrenewable energy sources, and discuss the effects of each on biodiversity.
Monday, January 6, 2014 at 11:55am

Science
Consider a wetland ecosystem similar to the one shown in the image below. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor.Suppose that the local ...
Monday, January 6, 2014 at 11:18am

Physical science
It takes 300 N of force and a distance of 20 m for a moving cart to come to a stop. How much kinetic energy did this cartpath?
Sunday, January 5, 2014 at 11:11pm

Science
Fertilizers and pesticides applied to farm fields in Pennsylvania have made their way down into the Chesapeake Bay in Maryland. This is an example of _________________ pollution.
Sunday, January 5, 2014 at 8:49pm

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