Friday
August 1, 2014

Homework Help: Science

Branches of Science

Recent Science Questions

Post a New Question | Current Questions

science
Sperm from a pure breeding big brained mouse is used to fertilize the eggs of a pure breeding small brained mouse. A monohybrid cross of the F1 individuals produces 221 big brained mice and 89 small brained mice (recall that a monohybrid cross refers to selfing or crossing ...
Saturday, January 18, 2014 at 3:36pm

science
transmission electron microscope compound (light) microscope scanning electron microscope field scope dissecting microscope Arrange the five types of microscopes in order from lowest resolution to highest.
Saturday, January 18, 2014 at 3:21pm

Science - 6th grade : CHECK MY ANSWER
Which of the following sets of terms is associated with air pollution caused by burning fossil fuels 1.acid rain, ozone hole, skin cancer 2.methane, smog, carbon dioxide 3.sulfur dioxide, smog, chlorofluorocarbons 4.carbon dioxide, smog, acid rain MY ANSWER: Is the answer: 4....
Saturday, January 18, 2014 at 11:16am

Science
A string of an instrument is stretched between two points 25.0 cm apart with a tension of 65.0 N. The mass/length of the string is 4.00x10-3 kg/m. The frequency of the mode of vibration with the lowest frequency (the first harmonic) is
Saturday, January 18, 2014 at 2:33am

Science
Which of the following is the most effective way to preserve biodiversity? A. Captive breeding B. Habitat destruction C. Habitat preservation D. Habitat fragmentation Can you please help? I know its not A or B. Is the answer C? Thanks.
Friday, January 17, 2014 at 9:09pm

Earth Science
Silver has a density of 10.5 g/cm cubed, and gold has a density of 19.3 g/cm cubed. Which would have the greater mass, 5cm cubed of silver or 5 cm cubed of gold?
Friday, January 17, 2014 at 6:29pm

science help plzzz
1. Which of the following statements best defines tides? (1 point) when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours the rise of ocean water that occurs 12 times a day a giant wave that can be extremely ...
Friday, January 17, 2014 at 5:29pm

Science
I really need help, what kind of renewable energy is used for hot water? I know that Geothermal heat pumps can be used to heat a house up, but what can create hot water? Thanks.
Friday, January 17, 2014 at 4:28pm

algebra
A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 mL of 60% sugar solution for an experiment ?
Friday, January 17, 2014 at 1:15pm

science
Suppose all of the apples have a mass of 0.10 kg. If one of the apples in the bowl (C) is 1.0 meter above the ground, what is its potential energy?
Friday, January 17, 2014 at 9:50am

science
tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had sunlight 24 hours a day. Include such things as how this would affect your sleep, work, school and crime.
Friday, January 17, 2014 at 7:06am

science
Tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had 24 a day.Include such things as how this would affect your sleep, work, school and crime?
Thursday, January 16, 2014 at 10:45pm

science/math
A car traveling at the speed of 30.0 m/sec encounters an emergency and comes to a complete stop. how much time will it take for the car to stop if its rate of deceleration is -4.0 m/sec
Thursday, January 16, 2014 at 9:17pm

Science - 7th grade
Is radiation damaging to the health of humans? If so, in what way/ways? My answer is: Yes, radiation though helpful in treating certain diseases is damaging to the health of human beings in many ways one of which being that it mutates our DNA and is unhealthy. It can also make...
Thursday, January 16, 2014 at 9:01pm

Science?
I'm doing a science experiment where I have to light an object on fire to do the experiment.. It can't be oil or electrical fire. So I need some objects I can light on fire. Such as a candle. But I can't use this one
Thursday, January 16, 2014 at 8:10pm

Science
Relationship between heredity and traits
Thursday, January 16, 2014 at 6:12pm

SCIENCE(CHECK ANSWER)
how does the use of a golf club make it easier to move a golf ball from its starting position to a hole 250 yards away? A.the golf club reduces the distance over which the input force is applied B.the golf club reduces the input force needed.(I PICKED THIS) C.the golf club ...
Thursday, January 16, 2014 at 6:08pm

science
check answers 1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done? A. 0.040 j B.9 j C.14 j (I PICK THIS) D.25 j 2.to chop wood you apply 50.0n of force to an ax. The ax applies 600.0n of force to the wood. What is the ...
Thursday, January 16, 2014 at 5:13pm

science !!! help
please answer these 4 questions about since I know nothing about this. 1. A box of cleaning supplies weighs 15n.if the box is lifted a distance of 0.60m,how much work is done? A. 0.040 j B.9 j C.14 j D.25 j 2.to chop wood you apply 50.0n of force to an ax. The ax applies 600....
Thursday, January 16, 2014 at 4:55pm

science/writing
How are stink bugs harmful to crops?
Thursday, January 16, 2014 at 3:53pm

science help asap!!!
Hi, can someone check my answers asap!!? i am on a deadline!! 1. What doe the notation TT mean to geneticists? (1 point) two dominant alleles heterozygous alleles at least one dominant allele one dominant and one recessive allele 2. An organisms genotype is (1 point) its ...
Thursday, January 16, 2014 at 1:12pm

Maths lits,business studies,life science,geography
Hy,i jst want to ask what i could become if i do these subject
Thursday, January 16, 2014 at 10:26am

science
what steps in meiosis are similar to steps of mitosis
Thursday, January 16, 2014 at 10:12am

science
disturbance of an ecosystem by human activity often has negative effects on the number of species, which is a measure of its
Thursday, January 16, 2014 at 10:04am

Earth Science
Analogy: melting is to freezing as partial melting is to _______? a. partial freezing b. magma. c. boiling. d. fractional crystallization.
Thursday, January 16, 2014 at 9:24am

life science
define the name molecul?
Thursday, January 16, 2014 at 2:33am

Subjects
Wat is life science?
Wednesday, January 15, 2014 at 8:00pm

science... PLEASE HELP!
What are 5 examples of oganisms that are in the Prostista Kingdom?
Wednesday, January 15, 2014 at 4:54pm

Science
I really need help in Science. Right now in science we are doing renewable energy. For the assignment we have two choices, a house or car of the future, I decided to do a house. The question is, "How could renewable energy sources be used in a house?" For the house ...
Wednesday, January 15, 2014 at 4:29pm

science
IS PLUTO A PLANET??????????????????????????????????​????????????????????????????????????????​????????????????????????????????????????​????????????????????????????????????????​????????????????????????????????????????​...
Wednesday, January 15, 2014 at 3:24pm

Science
Which of the following statements is most closely associated with Einstein's general theory of relativity? The gravitational constant has the same value everywhere. Mass is equivalent to weight. Being in an accelerated frame is indistinguishable from experiencing gravity. ...
Wednesday, January 15, 2014 at 12:48pm

science
1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...
Wednesday, January 15, 2014 at 11:39am

Science
1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...
Wednesday, January 15, 2014 at 9:57am

Science
Can someone check if these are right: Tell the reaction rate 1.)Question: one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. Answer: increasing TEMPERATURE 2.) Question: a mixture of baking powder, flour, sugar, and ...
Wednesday, January 15, 2014 at 8:36am

SCIENCE HELP PLEASE PLEASE
Post a New Question Current Questions Homework Help: Science. NEED HELP PLEASE Posted by Kalie on Tuesday, January 14, 2014 at 11:04pm. Can someone check if these are right: Tell the reaction rate 1.)Question: one antacid tablet is placed in a glass of cold water, while ...
Wednesday, January 15, 2014 at 7:59am

Science. NEED HELP PLEASE
Can someone check if these are right: Tell the reaction rate 1.)Question: one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. Answer:TEMPERATURE 2.) Question: a mixture of baking powder, flour, sugar, and eggs is placed...
Tuesday, January 14, 2014 at 11:04pm

Science
Can someone check if these are right: Tell the reaction rate 1.)Question: one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. Answer:TEMPERATURE 2.) Question: a mixture of baking powder, flour, sugar, and eggs is placed...
Tuesday, January 14, 2014 at 10:43pm

Science
What is the radius in nm of the electron orbit of a hydrogen atom for n=3? What is the radius in nm of the electron orbit of a hydrogen atom for n=4?
Tuesday, January 14, 2014 at 7:44pm

science
Mercury, a metal that is liquid at room temperature, has a density 13.5 times the density of water. How many pennies could your boat hold if we were floating it in mercury instead of water?
Tuesday, January 14, 2014 at 7:38pm

science
describe the ecological succession that would take place in an open field of grass.
Tuesday, January 14, 2014 at 7:27pm

8th Grade Earth Science Help?
Which of the following terms refers to the time it takes for one-half of the radioactive atoms in a sample of a radioactive element to decay? - relative age - absolute age - potassium-argon data - half-life** Is my answer correct?
Tuesday, January 14, 2014 at 7:05pm

Science
Geologists use radioactive dating to... - determine the relative age of rock layers. - tell the difference between molds and casts. - tell where one soil horizon begins and the next one ends. - determine the absolute ages of rocks. I think it is to determine the absolute ages ...
Tuesday, January 14, 2014 at 6:15pm

Science
Have to answer these in a reflection. Help? How has science evolved over time? How is human ingenuity portrayed in sciences? In what ways have humans shaped science? In what ways has science shaped our lives? What would the world be like without science? In what way has ...
Tuesday, January 14, 2014 at 6:07pm

Physical Science HELP
Can someone check if these are right: Tell reaction rate 1.) one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. TEMPERATURE? 2.) a mixture of baking powder, flour, sugar, and eggs is placed in the oven. TEMPERATURE? 3...
Tuesday, January 14, 2014 at 6:04pm

Physical Science
Can someone check if these are right: Tell reaction rate 1.) one antacid tablet is placed in a glass of cold water, while another table is placed in a glass of hot water. TEMPERATURE? 2.) a mixture of baking powder, flour, sugar, and eggs is placed in the oven. TEMPERATURE? 3...
Tuesday, January 14, 2014 at 5:41pm

science
during which month will Europe and Africa each have equal amounts of sunlight. a. march b. june c. decemeber d. january
Tuesday, January 14, 2014 at 4:07pm

Science/math
If Greenland ice sheet melted, approximately how much would the sea level rise worldwide? (1 meter =3.28 feet) a. 500 feet b. 16.4 feet c. 50 feet d. 164 feet
Tuesday, January 14, 2014 at 2:27pm

SCIENCE HELP JUST 2 QUESTIONS!! PLZZ HELP! :)
1) Identify the systems of your body, and explain how these systems work together. 2) Describe the flow of blood to the human body, including through each of the four chambers of the heart. Explain how the blood changes as it moves through the various locations in the body.
Tuesday, January 14, 2014 at 1:56pm

science
all of the following are explanations for glacial periods EXCEPT. a. varying solar energy b. volcanism c. biological organisms d. Earth's orbit's precession
Tuesday, January 14, 2014 at 1:27pm

Science
1. Over time, a particular plant has developed a longer stamen. Which of the following is a possible advantage of having a longer stamen? A. A longer stamen could ensure that an insect brushes against an another and picks up pollen. B. A longer stamen could ensure that the ...
Tuesday, January 14, 2014 at 12:50pm

Science
Two unlike vertical forces of 10N and Q N act at apoint A and be respectively where AB is horizontal and the length of 3m . The resultant of the 2 forces is a force of P N which acts at a point of X on the line of BA reduced such that AX is 4.5m.find P and Q
Tuesday, January 14, 2014 at 4:41am

science
What mass of AgN03 would you dissolve in water to get 1g of silver?
Monday, January 13, 2014 at 9:38pm

science (ipc)
describe using bernoulli's principle, how roofs are lifted off buildings in tornadoes
Monday, January 13, 2014 at 8:31pm

Math help plz..
Joe wants to fence a rectangular pen for his goats. The length of the pen should be at least 60 ft, and the distance around should be no more than 260 ft. Which system of inequalities and graph represent the possible dimensions of the pen? (1 point) Terry has completed 15 ...
Monday, January 13, 2014 at 7:50pm

Science
Which of the following traits is acquired? a) the number of petals that grow in a plant's flowers b) the wing shape of a wild bird c) the ability of some gorilla's to use sign language d) a cheetah's ability to run faster than any other land animal The height of a ...
Monday, January 13, 2014 at 7:32pm

Math- Systems of equations and inequalities
Joe wants to fence a rectangular pen for his goats. The length of the pen should be at least 60 ft, and the distance around should be no more than 260 ft. Which system of inequalities and graph represent the possible dimensions of the pen? (1 point) Terry has completed 15 ...
Monday, January 13, 2014 at 7:28pm

science... PLEASE HELP!
Within which group would all members show the greatest similarities: Phylum kingdom genus Or species?
Monday, January 13, 2014 at 4:20pm

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...
Monday, January 13, 2014 at 3:05pm

medical terminology/exercise science terminology
________ are typically used to block pain a.anesthetics b.antipruritics c.anticogulants d.analgesics my answer is a
Monday, January 13, 2014 at 12:18pm

medical terminology/exercise science terminology
how does the body adapt to aerobic exercise a.by increasing blood pressure when a person isn't exercising b.by increasing the heart rate when a person isn't exercising c.by decreasing the heart rate when a person isn't exercising d.by decreasing blood pressure when...
Monday, January 13, 2014 at 11:33am

medical terminology/exercise science terminology
which one of the following fitness tests is best for sedentary individuals a.one mile walk test b.strep test c.one -RM test d.cycle ergometer test my answer is d
Monday, January 13, 2014 at 11:26am

Science
What is an example of inbreeding? Please tell me.
Monday, January 13, 2014 at 10:46am

Science
Calculate the mass of calcium carbonate which decomposes to produce: 50g of calcium oxide and 5g of carbon dioxide
Monday, January 13, 2014 at 6:03am

Science
Lines of latitude and longitude on a globe or map____________. a. estimate b. move c. intersect d. adjust
Sunday, January 12, 2014 at 11:24pm

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...
Sunday, January 12, 2014 at 8:26pm

Science
What would be a good hypothesis on a dominant trait? I'm 4th grade and this is my first project but I am confused cause I do not know how to write one thank you
Sunday, January 12, 2014 at 8:17pm

Science Please check my answer!
Which physical properties are characteristic of nonmetal solids? Choose all that apply. A) brittle B) little luster C) malleable D) ductile E) good conductors of heat A row of elements on the periodic table is called a(n) A) group. B) period. C) valence. D) orbital. My answers...
Sunday, January 12, 2014 at 3:44pm

science
What type of star is the Sun?
Sunday, January 12, 2014 at 3:38pm

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

Pages: <<Prev | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | Next>>

Post a New Question | Current Questions

Search
Members