Tuesday
September 16, 2014

Homework Help: Science

Branches of Science

Recent Science Questions

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science
Explain why 100 percent solid bricks are special. Give examples.
Thursday, January 23, 2014 at 9:04pm

science
Imagine you are an energyexpert on a planning council for a new town to be built on an island. Evaluate resources or methods you will suggest that the new town use. Justify your choices and provide possible challenges to the project.
Thursday, January 23, 2014 at 7:37pm

Science
Which of the following functions like a fulcrum in a lever? A. tendons connecting muscle to bone at a joint. B. ligaments connecting bones at a joint. C. two muscles working as a pair to move a joint. D. two bones meeting at a joint.
Thursday, January 23, 2014 at 7:06pm

science... PLEASE HELP!
Please explain how the movement and position of the particles change when a liquid bevomes a solid.
Thursday, January 23, 2014 at 5:46pm

science
An 8kg bowling ball is rolling in a straight line toward you. If its momentum is 16kg m/sec, how fast is it traveling?
Thursday, January 23, 2014 at 5:31pm

science... PLEASE HELP!
Why does an investigator in an experiment change only one variable?
Thursday, January 23, 2014 at 5:03pm

science... PLEASE HELP!
Please describe a constant in an experiment.
Thursday, January 23, 2014 at 4:17pm

Science
Can anyone help me come up with a science project idea ?
Thursday, January 23, 2014 at 4:02pm

science
if 4 cars were going 100m the entire time what happens to speed,velocity and accelerationas one car completes one full lap
Thursday, January 23, 2014 at 12:40pm

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 2. 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...
Thursday, January 23, 2014 at 12:31pm

Science :(
Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.
Thursday, January 23, 2014 at 9:49am

physical science
when will the resultant of the two(5N ,7N)vectors be at maximum?
Thursday, January 23, 2014 at 4:09am

chemical science
what is the van't Hoff factor for MgSo4.7H2O and ZnSo4.7H2O?
Thursday, January 23, 2014 at 3:11am

science
If the object is moved to a point 3 cm away from the lens. what is the new position, height, nature of the image?
Wednesday, January 22, 2014 at 11:33pm

science
An object 3 cm is high is placed 24 cm away from a convex lens of focal length 8 cm. Find nature position and height of the image?
Wednesday, January 22, 2014 at 11:20pm

science
what is heterogeneous mixture
Wednesday, January 22, 2014 at 10:21pm

science
1.what similarities do nuclear energy and chemical energy share?pick all that apply A.both are types of kinetic energy. B.both are types of potential energy C.both involve magnetic energy D.both involve stored energy (I PICK B AND D) 3.the energy an object has due to its ...
Wednesday, January 22, 2014 at 8:46pm

Science
Which of the following is the minimum level of structure needed to preform the function of waste removal? A. Body System B. Tissue C. Cell D. Organ I chose A for my answer, is it correct? Thanks. :)
Wednesday, January 22, 2014 at 8:28pm

science(answer please)
please answer these 1.what similarities do nuclear energy and chemical energy share?pick all that apply A.both are types of kinetic energy. B.both are types of potential energy C.both involve magnetic energy D.both involve stored energy 3.the energy an object has due to its ...
Wednesday, January 22, 2014 at 8:27pm

science
A class is learning about acceleration due to gravity. Their plan is to climb a ladder and drop different kinds of balls from the same height at the same time. They will repeat this for ten trials, recording the data after each test. A video will be made of the activity to ...
Wednesday, January 22, 2014 at 8:22pm

8th CCA Science
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body.**** C. A living thing dies and its skeleton is left exposed...
Wednesday, January 22, 2014 at 7:01pm

science help plzzz
Multiple Choice 1. Which of Earth's spheres contains mountains, valleys, and other landscapes? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following are examples of destructive forces? (1 point) ice wind both ice and wind neither ice nor wind 3. ...
Wednesday, January 22, 2014 at 6:44pm

Science help please
In class we have to think of a testable question for our science fair project our teacher is making us write 5 things I like then write make it into a testable question . EX: she said she likes sledding What is the effect of sled shape on sled speed ? I need help coming up ...
Wednesday, January 22, 2014 at 6:11pm

science
A rider with his bike, weighing a total of 300 kg jumps off a sloped ramp with a speed of 5.5 m/s. How high will the biker jump with this speed?
Wednesday, January 22, 2014 at 3:43pm

computer Science
20 You are trying to boot your computer but your computer keeps displaying a message after the POST that says “'invalid specification”. What does the error mean?” a. an attempt to overclock the primary drive has failed...
Wednesday, January 22, 2014 at 12:33pm

Physical Science
1) Carbon dioxide is obtain from the air and changed into carbohydrates oxygen during the process of fossilization. respiration. digestion. photosynthesis. 2) Which sequence of processes must occur for an atom of carbon to go from car to tree? respiration, decomposition. ...
Wednesday, January 22, 2014 at 10:50am

science
What is the acceleration of a 7kg rocjet if a force of 68.6 kg m/s/s (N) is used to move it away from the earth
Tuesday, January 21, 2014 at 7:53pm

science
Three people push a piano on wheels with forces of 130 N to the right, 150 N to the left, and 165 N to the right. What is the strength and direction of the net force on the piano?
Tuesday, January 21, 2014 at 6:35pm

science
How might the formation of Pangaea have led to mass extinctions at the end of the Permian period, about 250 million years ago?
Tuesday, January 21, 2014 at 6:31pm

science
A dog (canis familiaris) and a coyote (canis latrans) will readiliy mate in captivity and their offspring are healthy and fully fertile. Are we justified in saying they are distinct species? What might this tell us about the history of dogs and coyotes?
Tuesday, January 21, 2014 at 6:29pm

science
What is the density of Radon (Rn) gas at STP (standard temperature and pressure)? How do I solve/set up this problem? Thank you!
Tuesday, January 21, 2014 at 5:32pm

science
Why did Charles Darwin talk about pigeons (how breeders produced many shapes, sizes, and colors of pigeons, all starting from a wild pigeon) in his book On the Origin of Species?
Tuesday, January 21, 2014 at 4:49pm

Science
common pathways for food and air are the (1), which connects to the mouth, and (2), which connects to the larynx. Epithelium in this region is (3), which provideds good protection from friction. Three bands of skeletal muscle, the (4) propel food into the (5). Entrance to the ...
Tuesday, January 21, 2014 at 4:36pm

Life science
Name any 3 mineral elements that are required for the formation of membremes.
Tuesday, January 21, 2014 at 4:21pm

Science help please
Provide three statements that demonstrate the importance of units when describing motion? I am really confused about this question. I don't know what they are trying to ask.
Tuesday, January 21, 2014 at 1:51pm

Science
Can someone please please help me? I don't have a text book, i have a online book and it isn't working. Can someone please be nice and help me? Science isn't my subject! 1. Why is Earth’s temperature just right for life? (1 point) Earth’s core is hot ...
Tuesday, January 21, 2014 at 12:12pm

science
1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) nitrogen-fixing bacteria denitrifying bacteria decomposers producers 2. Which step in the nitrogen cycle is accelerated at the beginning of the ...
Tuesday, January 21, 2014 at 10:14am

science
1. Which of the following explains why your body may contain a carbon atom that was present in George Washington’s body in 1776? (1 point) Carbon moves in a one-way direction through living organisms only. Carbon moves in a one-way direction from the atmosphere and then ...
Tuesday, January 21, 2014 at 9:16am

science
3. How would the carbon cycle be affected if all producers were removed? (1 point) Carbon compounds in animals would not be broken down to release carbon dioxide back into the atmosphere. Carbon would not have a way to enter the bodies of living things. Carbon dioxide levels ...
Tuesday, January 21, 2014 at 9:13am

can you help me with one science question Ms. Sue
3. How would the carbon cycle be affected if all producers were removed? (1 point) Carbon compounds in animals would not be broken down to release carbon dioxide back into the atmosphere. Carbon would not have a way to enter the bodies of living things. Carbon dioxide levels ...
Monday, January 20, 2014 at 10:02pm

someones GOTTA help me with this science...!!!
1. Which of the following describes the correct sequence of events during the water cycle? (1 point)precipitation ¨ condensation ¨ evaporation ¨ runoff condensation ¨ precipitation ¨ runoff ¨ evaporation runoff ...
Monday, January 20, 2014 at 9:25pm

Science
Mutations can occur in sex cells or in body cells. In which cell type might a mutation be passed from generation to generation? Explain.
Monday, January 20, 2014 at 8:17pm

Science
Mutations can occur in sex cells or in body cells. In which cell type might a mutation be passed from generation to generation? Explain.
Monday, January 20, 2014 at 7:16pm

science
Why is it important to preserve biodiversity? A. Preservation of biodiversity prevents extinction of species, b. Preservation of biodiversity prevents the human population from increasing exponentially, c. Preservation of biodiversity disturbs the balance of ecosystems, d. ...
Monday, January 20, 2014 at 5:43pm

Science
A sample of nitrogen gas is confined in a 8.494 L container at 2.643 x 102 torr and 50 oC. How many moles of gas are present in the sample? So I thought I set this problem up right and when I type the answer into CALM my answer is incorrect. This is what I did: PV=nRT (2.643 x...
Monday, January 20, 2014 at 5:14pm

science
whats the uses of the element mercury?
Monday, January 20, 2014 at 3:19pm

Science
Which of the following is the minimum level of structure needed to perform the function of waste removal? A. body system B. tissue C. cell D. organ C Which two systems work with the muscular system to allow the body to move? A. digestive and urinary B. skeletal and nervous C. ...
Monday, January 20, 2014 at 2:58pm

Science
A green leaf is reflecting a. no light b. red light c. green light d. all light C
Monday, January 20, 2014 at 2:54pm

Science
How percentage n2gas on air
Monday, January 20, 2014 at 1:59am

Science
1. 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? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 at 6:30pm

Science
1. 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? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 at 4:58pm

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.
Sunday, January 19, 2014 at 3:48pm

english
I need help paraphrasing this paragraph. Because addiction treatment aims to change deeply embedded habits, relapse can be part of the process. However, this is a well-known feature of diabetes, hypertension, asthma, and other chronic diseases with treatment plans that depend ...
Sunday, January 19, 2014 at 3:15pm

Science help asap 2 questions!!!
4. Which of the following describes an example of a potentially invasive species? (1 point) Fruit covered with fruit fly eggs is trucked from Mexico to Canada. Racehorses are shipped by boat from New York to London. Coffee beans in burlap bags are flown from Africa to the U.S...
Sunday, January 19, 2014 at 2:32pm

maths, physical science , life science , geography
Hi I am in grade 10 , I am doing maths physical science, life science and geography, what jobs can I get into with those subjects
Sunday, January 19, 2014 at 12:45pm

SCIENCE 1 QUESTION PLS HELP ASAP
Select three words that belong together. To do this pick one word from each of the three sets below: Set 1: Estuary, Lake, Neritic Zone Set 2: High Salt, Intermediate Salt, No Salt Set 3: Trout, coral, oyster Answer choices: A) Neritic zone, intermediate salt, oyster B) Lake, ...
Sunday, January 19, 2014 at 9:43am

Science
2 forces of 5N&7N respectively act on an object. (a) When will the resultant of 2 vectors be at a maximum? (b) When will the resultant of the 2 vectors be at a minimum?
Sunday, January 19, 2014 at 12:33am

SCIENCE 1 QUESTION PLS HELP ASAP
Select three words that belong together. To do this pick one word from each of the three sets below: Set 1: Estuary, Lake, Neritic Zone Set 2: High Salt, Intermediate Salt, No Salt Set 3: Trout, coral, oyster Answer choices: A) Neritic zone, intermediate salt, oyster B) Lake, ...
Saturday, January 18, 2014 at 10:09pm

SCIENCE PLS URGENT 1 QUESTION ASAP!!!!!
8. Chromosome pairs contain different versions of genes, which are called __________________. (1 point) is it base? is it dna? is it alleles? help asap!!!??
Saturday, January 18, 2014 at 4:18pm

science
Two pure bred strains of peas are crossed: wrinkled, yellow x round, green. All the offspring are round, yellow. These offspring were self-crossed and their progeny produced four different phenotypes. For this question assume the random assortment of two unlinked genes. See ...
Saturday, January 18, 2014 at 3:41pm

science
The Australian grass tree, from the genus Xanthorrhoea in the lily family, grows to a height of about 4.5 m, bears long narrow leaves in a tuft at the top of the trunk, and produces yellow or white flowers in a spike above the leaves. A yellow-flowered tree was self-crossed. ...
Saturday, January 18, 2014 at 3:40pm

science
The Australian grass tree, from the genus Xanthorrhoea in the lily family, grows to a height of about 4.5 m, bears long narrow leaves in a tuft at the top of the trunk, and produces yellow or white flowers in a spike above the leaves. A yellow-flowered tree was test-crossed. ...
Saturday, January 18, 2014 at 3:40pm

science
The Australian grass tree, from the genus Xanthorrhoea in the lily family, grows to a height of about 4.5 m, bears long narrow leaves in a tuft at the top of the trunk, and produces yellow or white flowers in a spike above the leaves. A yellow-flowered tree was self-crossed. ...
Saturday, January 18, 2014 at 3:38pm

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

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