Wednesday
October 1, 2014

Homework Help: Science

Branches of Science

Recent Science Questions

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integrated science
what are atoms
Monday, September 22, 2014 at 7:44pm

Science
Explain the role of a hypothesis in a scientific investigation.
Monday, September 22, 2014 at 7:15pm

Science
In terms of energy, what is the difference between glucose and ATP?
Monday, September 22, 2014 at 7:02pm

Science
Explain how sunlight is the primary source of energy for your own life? Please help!
Monday, September 22, 2014 at 6:57pm

science
1.A melting glacier leaves behind _______ 2.One place to find large, moving _______ is in cold mountain areas 3. Glaciers scoop out _______ that can later fill up with water 4.The movement of some glaciers is helped by _____ 5.Climate change can affect the speed of a glacier&#...
Monday, September 22, 2014 at 6:54pm

science
what is another path that a scientist might follow using the data from an experiment that did not support the hypothesis .
Monday, September 22, 2014 at 5:48pm

science 1 question
A student measures the volume of a liquid and finds it to be 40mL. How many significant figures are in the measurement? 1 2 3 4 I do not know if it is 1 or 2!??
Monday, September 22, 2014 at 3:13pm

Science
which of the following is a correctly balanced equation A.2Cu+O2--> 2CuO B.Mg + O2--> MgO2 C. 3KCI+HNO3-->3HCl+KNOW D. CaCO3---> CaO+CO3 answer b
Monday, September 22, 2014 at 2:54pm

Science(Energy)
Which of the following is the best example of transforming electromagnetic energy into thermal energy? A. when trees absorb sunlight for photosynthesis B. when the interior of a car absorbs sunlight and warms up C. when a solar panel absorbs sunlight to make electricity D. ...
Monday, September 22, 2014 at 2:45pm

science
make it right A lot of the rubbish we produce on land pollutes the park.
Monday, September 22, 2014 at 8:53am

science
1.3 mol of calcium carbonate decomposed to calcium oxide and carbon dioxide. How many grams of calcium oxide is produced?
Monday, September 22, 2014 at 8:07am

science
how do you covert 0.779 kl to l to ml to hl using the decimal method
Sunday, September 21, 2014 at 2:41pm

science
If a certain gas occupies a volume of 20L when the applied pressure is 10atm , find the pressure when the gas occupies a volume of 5.0L
Sunday, September 21, 2014 at 10:49am

science
if the displacement of a particle varies with time as root of x= t+7, the a)velocity is inversely proportional to t b)velocity is proportional to square of t c)velocity is proportional to root of t d)particle moves with constant acceleration pls help...i have no idea how to ...
Sunday, September 21, 2014 at 10:41am

science
a ball is thrown vertically upwards from the top of a tower with a speed of 100 ms-1. it strikes the pond near the base of the tower after 25 seconds. the height of the tower is? a)500m b)125m c)625m
Sunday, September 21, 2014 at 10:30am

Environmental Science
What are some common justifications for environmental policy?
Saturday, September 20, 2014 at 10:37pm

HELP IN SCIENCE ASAP!!
PLEASE CHECK ANSWERS!!
Saturday, September 20, 2014 at 6:57pm

Science
If a car accelerate at 10m/s for 5 mins what is the is the change in speed
Saturday, September 20, 2014 at 6:37pm

Science
Which of the following best describes the dependent variable in an experiment? A- the variable that is measured B- the variable that is manipulated C- the variable that you can see D- the variable that is most common (My guess is A) Photosynthesis is the process whereby plants...
Saturday, September 20, 2014 at 5:56pm

Science(Magnets)
Should be easy, this. The two south pole ends of two magnets are touching. Which of the following can be concluded? A. No work was required by an outside force. B. The magnets are naturally attracted to each other. C. Work was required by an outside force. D. The potential ...
Saturday, September 20, 2014 at 8:45am

Science
Name the two compounds formed when ethane burns in an excess of oxygen
Saturday, September 20, 2014 at 1:55am

Science
Name the two compounds formed when ethane burns in an excess of oxygen.
Friday, September 19, 2014 at 10:44pm

HELP IN SCIENCE ASAP!!
PLEASE HELP!!
Friday, September 19, 2014 at 10:16pm

Science
Which of the following explains the relationship between genes and chromosomes? A. Chromosomes come in different versions called genes. B. Genes come in different versions called chromosomes. C. Chromosomes are structures that are made up of two versions of multiple genes. D. ...
Friday, September 19, 2014 at 9:46pm

science
A pea plant with yellow seeds is crossed with a pea plant with green. All of the offspring have yellow seeds. The allele for yellow seeds is A. Dominant because all of the offspring have yellow seeds. B. Recessive because all of the offspring have yellow seeds. C. Dominant ...
Friday, September 19, 2014 at 9:16pm

Science
The desert tortoise digs a burrow and hides in it during the day to stay cool, because of the extreme heat above ground. Which characteristic of life does this behavior best illustrate? A- response B- metabolism C- cellular organization D- growth and development (my guess is A...
Friday, September 19, 2014 at 8:35pm

Science
The desert tortoise digs a burrow and hides in it during the day to stay cool, because of the extreme heat above ground. Which characteristic of life does this behavior best illustrate? A- response B- metabolism C- cellular organization D- growth and development (my guess is A...
Friday, September 19, 2014 at 6:53pm

Science
The desert tortoise digs a burrow and hides in it during the day to stay cool, because of the extreme heat above ground. Which characteristic of life does this behavior best illustrate? A- response B- metabolism C- cellular organization D- growth and development (my guess is A...
Friday, September 19, 2014 at 6:26pm

Life Science, Maths Literacy, CAT, Business studie
Which course can I enrol for with those subjects? Please help..
Friday, September 19, 2014 at 6:25pm

Science
Which of the following shows the levels of organization in a multi-cell organism from the smallest level to the largest level? A- cell, tissue, organ, organ system, organism B- organism, organ system, organ, tissue, cell C- tissue, cell, organ, organ system, organism D- cell, ...
Friday, September 19, 2014 at 6:09pm

Science
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...
Friday, September 19, 2014 at 5:44pm

Science
Refer to the following scenario to answer Questions 3 through 7. 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 ...
Friday, September 19, 2014 at 5:10pm

Science
How does eye location beast represent the relationship between sturcture and function? A- it determines how much of the surroundings an organism can see. B- it affects how an organism interacts with others in its population C- it indicates the maximum height an organism can ...
Friday, September 19, 2014 at 4:36pm

Science
Name a molecule that transmits energy. Answer: Energy Molecule
Friday, September 19, 2014 at 11:50am

physical science
Two 3.4 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
Friday, September 19, 2014 at 9:56am

science
Name a molecule that transmits energy. Answer: Energy Molecule
Friday, September 19, 2014 at 8:51am

physics
Two 2.5 kg physical science textbooks on a bookshelf are 0.25 m apart. What is the magnitude of the gravitational attraction between the books?
Friday, September 19, 2014 at 12:06am

Physical Science
A heat pump releases 103.0 kcal as it removes 54.0 kcal at the evaporator coils. How much work does this heat pump ideally accomplish? The answer should be in KJ
Thursday, September 18, 2014 at 10:13pm

science
Name a molecule that transmits energy. Answer: Energy Molecule
Thursday, September 18, 2014 at 10:11pm

science
Can there be 2 full moons?
Thursday, September 18, 2014 at 9:53pm

Science
Which statement best represents how structure relates to function? A- a horse's mane is often black B- many tropical birds can be taught to speak C- butterfly cocoons are often camouflaged D- some insects live longer than others
Thursday, September 18, 2014 at 9:52pm

science
Name a molecule that transmits energy. Answer: Energy Molecule
Thursday, September 18, 2014 at 9:44pm

Science
what are the component parts of modern fireworks? what does each part do?
Thursday, September 18, 2014 at 8:57pm

science
most marine life is found in shallow waters of the?
Thursday, September 18, 2014 at 7:55pm

Science
What Type of Simple Chemical Reaction Occurs in Fireworks?
Thursday, September 18, 2014 at 7:55pm

science
what is a geological process occurring over time
Thursday, September 18, 2014 at 7:54pm

science
what keeps the earth cool during the day and warm at night
Thursday, September 18, 2014 at 7:52pm

science
what are found at leading and trailing continental edges.
Thursday, September 18, 2014 at 7:50pm

earth space science
What include things like temperature, precipitation and humidity
Thursday, September 18, 2014 at 7:42pm

science
Wow, you make me stay here for nearly an hour to wait for you to answer a question. Thanks. By the way, don't say how you didn't know the answer, you could have informed me of that 50min earlier.
Thursday, September 18, 2014 at 6:45pm

science
a student brings in a piece of moldy bread. which microscope would you use to view the mold? why?
Thursday, September 18, 2014 at 6:27pm

science
a student brings in a piece of moldy bread. which microscope would you use to view the mold? why?
Thursday, September 18, 2014 at 6:05pm

science 1 question
Why do scientists use standard units of measurement? because their tools only measure in these units because other units are either too small or too large to work with so they can communicate findings without confusion*** so that people who are not scientists cannot understand...
Thursday, September 18, 2014 at 4:01pm

Physical Science
A 12 kilogram tire is to be pulled by three ropes. One force, F1, has a magnitude of 50N. Orient the other two forces so that the magnitude of the resulting acceleration of the tire is least. And find that magnitude if: F2=30N, F3= 20N.
Thursday, September 18, 2014 at 3:24pm

Science
What are 3 facts that show ticks have a parasitic relationship with deer? 1..Ticks live on the skin of animals
Thursday, September 18, 2014 at 8:18am

science, chemistry
Calculate the number of moles inside a soap bubble 1cm in diameter and 1atm pressure at a temperature of 25 degree celcious.
Thursday, September 18, 2014 at 8:05am

science/math
a skateboarder traveling at 7.0 meters per second rolls to a stop at the top of a ramp in 3.0 seconds. what is the skateboarders acceleration? is 2.3m/s correct
Thursday, September 18, 2014 at 12:30am

science/math
a cyclist accelerates at a rate of 7.0m/s^2. how long will it take the cyclist to reach a speed of 18m/s? my answer is 2.5seconds. is this correct?
Thursday, September 18, 2014 at 12:28am

science/math
after traveling for 6.0 seconds, a runner reaches a speed of 10m/s. what is the runners acceleration? my answer is 60m/s , is that correct?
Thursday, September 18, 2014 at 12:26am

science/math
a car starting from rest accelerates at a rate of 8.0 m/s. what is its final speed at the end of 4.0 seconds?I got 32m/s, is this correct
Thursday, September 18, 2014 at 12:23am

science/math
as she climbs a hill, a cyclist slows down from 25mi/hr to 6mi/hr in 10 seconds. what is her deceleration? my answer is -1.9 is this correct or should it be a positive 1.9...am confused
Thursday, September 18, 2014 at 12:20am

physical science
The present record for the 100 meter dash is 9.58 seconds. back in 1988, Johnson ran the 100 meter dash in the world record time of 9.79 seconds. He was later to lose both his record and his gold medal to runner up Lewis because of steroid use. Calculate Johnson's average ...
Thursday, September 18, 2014 at 12:08am

physical science
Superfly, mass of only 1 gram, but capable of flying at the incredible speed of 840 million km/hr, meets a locomotive with a mass of 20,000 kg, traveling at 40km/hr. Who has the greater momentum?
Thursday, September 18, 2014 at 12:07am

Physical Science
at a speed of 30 mi/hr, the car crashes head on into a brick wall. despite the fact that the car crunched to a total stop, one of NEWTON'S laws predicts that you will continue to fly forward at 30 mi/hr until you collide with the windshield or dash. WHICH LAW?
Thursday, September 18, 2014 at 12:05am

science/math
If a car can go from 0 to 60mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? My answer was -10, is this correct. If not , I need help
Wednesday, September 17, 2014 at 10:37pm

Science
how might the extinction of a deer or a rabbit impact the ecosystem in which it lives?
Wednesday, September 17, 2014 at 10:35pm

Science
What are 3 facts that show ticks have a parasitic relationship with deer? 1..Ticks live on the skin of anomals
Wednesday, September 17, 2014 at 9:58pm

Science
1. What is the symbiotic relationship between a barnacle and a whale? How could you prove that the whale is not harmed? Commensalism
Wednesday, September 17, 2014 at 9:22pm

science
you and your brother are pushing a car with a dead battery. You exert forces of 20n and 25n in the same direction. What is the force applied on the car?
Wednesday, September 17, 2014 at 9:03pm

Science
1.what chemical properties of nail polish remover makes it dangerous? 2.Surgeons sometimes use metal plates and screws to hold broken bones together. What chemical properties do you think the metal should have?
Wednesday, September 17, 2014 at 8:59pm

Physical Science
Superfly, mass of only 1 gram, but capable of flying at the incredible speed of 840 million km/hr, meets a locomotive with a mass of 20,000 kg, traveling at 40km/hr. Who has the greater momentum?
Wednesday, September 17, 2014 at 8:49pm

Physical Science
The present record for the 100 meter dash is 9.58 seconds. back in 1988, Johnson ran the 100 meter dash in the world record time of 9.79 seconds. He was later to lose both his record and his gold medal to runner up Lewis because of steroid use. Calculate Johnson's average ...
Wednesday, September 17, 2014 at 8:45pm

Science
what chemical properties of nail polish remover makes it useful?
Wednesday, September 17, 2014 at 8:41pm

physical science
one gallon= 3.785 liters. If you were charged $1.10 per liter at the pump for Regular, how much would you be paying per gallon? Assuming American price levels, do we stop at this station or drive on?
Wednesday, September 17, 2014 at 8:29pm

Physical Science
You are driving. You have enough gas in your tank to go 50 miles. The next town is 72 kilometers away. Can you make it? Show work.
Wednesday, September 17, 2014 at 8:26pm

Science
Classify each as a physical characteristic or chemical property. -wood burns -clay is brown -steel wool rusts -a paper clip is 3cm long
Wednesday, September 17, 2014 at 8:20pm

Science
John took 45 minutes to bicycle to his grandmothers house a total of four kilometers what was his velocity in km hr?
Wednesday, September 17, 2014 at 8:12pm

science
How to manipulate the formulas of momentum, fore, acceleration
Wednesday, September 17, 2014 at 6:33pm

science/math
If a car can go from 0 to 60mi/hr in 8.0 seconds, what would be its final speed after 5.0 seconds if its starting speed were 50mi/hr? dont know what equation to use. please help
Wednesday, September 17, 2014 at 5:31pm

science
am confused. dont know what formula to use for this problem. A car traveling at a speed of 30.0m/s encounters an emergency and comes to a complete stop. How much time will it take for the car to stop if it decelerates at -4.0m/s?
Wednesday, September 17, 2014 at 5:09pm

physical science
the distance from one place to another is 80 miles. How far is it in kilometers?
Wednesday, September 17, 2014 at 4:02pm

Physical Science
Ok, I just want to make sure I am doing this right. It says mass= 3800grams. Silvers density is 10 grams/cm^3. How much will volume of water with silver displace in cm^3? So would it be 3800g/10g= 380 grams? or is that wrong?
Wednesday, September 17, 2014 at 4:00pm

Physical Science
Suppose an all good crown has mass m=3800 grams. Gold has a density of 19 grams/ cm^3. What is the volume of water displaced by a gold crown (in cm^3)? Please help :)
Wednesday, September 17, 2014 at 3:18pm

phsical science
Chemical changes _____.
Wednesday, September 17, 2014 at 2:58pm

Science
Put the following in the correct order. Report results Determine if hypothesis is true Do background research Construct a hypothesis Collect data Analyze results and draw conclusions Design and implement an experiment State the problem / ask questions Correct Order State the ...
Wednesday, September 17, 2014 at 11:37am

Physical Science
A 73.0 g silver spoon at 19.2 c is place in a cup of coffee at 91.2 c. How much heat does the spoon absorb from the coffee to reach a temperature of 85.6 c?
Wednesday, September 17, 2014 at 10:15am

Physical Science
A 1600.0 kg car with a speed of 75.0 km/h brakes to a stop. How many cal of heat are generated by the brakes as a result?
Wednesday, September 17, 2014 at 10:12am

Physicsl Science
A heat pump releases 103.0 kcal as it removes 54.0 kcal at the evaporator coils. how much work does this heat pump ideally accomplish? Answer should be in KJ
Wednesday, September 17, 2014 at 9:24am

Physical Science
please help me understand this question If measurements of a gas are 50L and 300 kilopascals and then the gas is measured a second time and found to be 75L, describe what had to happen to the pressure (if temperature remained constant). Include which law supports this ...
Tuesday, September 16, 2014 at 11:04pm

science
In general, what would a scientist do after forming a testable question? A. Design an experiment B. Develop a hypothesis C. Draw a conclusion D. Analyze data I think A because he has already done his hypothesis (my original answer. if not, B.
Tuesday, September 16, 2014 at 8:51pm

Science! Help!
A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl with grey gravel. To test this hypothesis, the student places on goldfish in a bowl with red gravel and another in a bowl with grey gravel. The color of the gravel is the ...
Tuesday, September 16, 2014 at 6:59pm

science
A drinking glass at a crime scene contains a clear colorless liquid that may be water or alcohol. As the investigator, you know that the densities of alcohol, water, and ice are 0.79g/mL, and 0.92/mL. Design a simple method to determine the identity of the mystery liquid. ...
Tuesday, September 16, 2014 at 6:52pm

Science
aluminum has a density of 2.7g/cm3 while copper has a density of 8.96g/cm3. Which metal would you choose to build a model airplane? why?
Tuesday, September 16, 2014 at 6:48pm

Science
the density of liquid mercury is 13.53 g/cm3.The density of a solid copper is 8.96 g cm3. would you expect a piece of copper to sink or float when placed in a container of liquid mercury?
Tuesday, September 16, 2014 at 6:45pm

Science
A student hypothesizes that a goldfish will be more active in a bowl that has red gravel than in a bowl with grey gravel. To test this hypothesis, the student places on goldfish in a bowl with red gravel and another in a bowl with grey gravel. The color of the gravel is the ...
Tuesday, September 16, 2014 at 6:30pm

Science!
If a bowling ball were moved from Earth to the moon, how would it's weight and mass change? A. The bowling ball would weigh the same, but it's mass would increase. B. The bowling ball would weigh the same, but it's mass would decrease. C. The bowling ball would ...
Tuesday, September 16, 2014 at 5:37pm

Science
Which component of the technological system is achieved when an automobile airbag inflates? A. Input B. Feedback C. Process D. Output Is the answer B?
Tuesday, September 16, 2014 at 5:31pm

science
dentify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix C. Consider how did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? ...
Tuesday, September 16, 2014 at 3:05pm

science
Suppose you place a 30kg weight 50cm from the pivot where should the following forces be applied to lift the load a)a 100N force b)a 150N force 2)how far will the load in question 1 be lifted if: a)the 100N force moves downwards b)the 150N force moveddownwards 1m
Tuesday, September 16, 2014 at 1:27pm

science
suppose you place a 30kg weight 50cm from the pivot, where should the following forces be applied to lift the load (a)a 100N force (b)a 150N force
Tuesday, September 16, 2014 at 1:17pm

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