Saturday
August 29, 2015

Homework Help: Science

Branches of Science

Recent Science Questions

Science
Which has a greater total resistance, a series circuit or a parallel circuit and why?
Monday, March 23, 2015 by Thi

Science grade 8
Which chemical equation is balanced? 1. H20 H 2 + 20 2 2. 2H20 2H2 +0 2 3. 2H20 H2 + 20 2 4. H2O 2H2 + 20 2 Im super confused... But I think its 4?? Im probably wrong so please help?!?!
Monday, March 23, 2015 by Amy

Earth science
What kind of front sometimes spawns tornadoes between an advancing cold and dry air mass and a warm moist air mass? 1) cold 3) stationary 2) warm 4) occluded
Monday, March 23, 2015 by Daniela

Science Check Please
1. Your ____ is your first line of defense against pathogens. brain heart large intestine skin 2. Blood vessels help regulate your body's temperature. When it's cold, your blood vessels ____ to decrease blood flow and retain heat. boil constrict cool down expand 3. The...
Monday, March 23, 2015 by YOLO

science
based on the masses of CaCl2 and Na3PO4 you determined from the periodic table, what mass combining ratio would you predict?
Sunday, March 22, 2015 by alex

Science ( No Bad Post)
1. A muscle that does its job without your thinking about it is called a _______ muscle. An example is the _______. (1 point) cardiac; bicep skeletal; blood vessels smooth; bladder none of these 2. The body's muscles, bones, and joints work together like a ...
Sunday, March 22, 2015 by YOLO

Science Help
Which of the following carries blood to every part of the body? (1 point) blood vessels the heart lymph nodes the ventricles 7. Nutrients and oxygen diffuse into body cells from ______. (1 point) arteries the aorta capillaries veins 8. The leading cause of death in humans is ...
Sunday, March 22, 2015 by YOLO

Science Please
Which of the following carries blood to every part of the body? (1 point) blood vessels the heart lymph nodes the ventricles 7. Nutrients and oxygen diffuse into body cells from ______. (1 point) arteries the aorta capillaries veins 8. The leading cause of death in humans is ...
Sunday, March 22, 2015 by SmartyPants

Science Please
Which of the following carries blood to every part of the body? (1 point) blood vessels the heart lymph nodes the ventricles 7. Nutrients and oxygen diffuse into body cells from ______. (1 point) arteries the aorta capillaries veins 8. The leading cause of death in humans is ...
Sunday, March 22, 2015 by SmartyPants

Earth science
13 of the19 lives lost you to the Wichita Andover tornado were at the mobile home park in Andover. Even though there was some advanced warning what could explain the relatively high death toll at this location?
Sunday, March 22, 2015 by Daniela

Science
13 of the19 lives lost you to the Wichita Andover tornado were at the mobile home park in Andover. Even though there was some advanced warning what could explain the relatively high death toll at this location?
Sunday, March 22, 2015 by Daniela

Science
One troy ounce of gold is worth $380. There are 33.8 grams per troy ounce. You have a stock colloidal solution of a very fine gold dust. Its concentration is .1% w/v. from this solution, 1 ml is placed in 9 ml of an isotonic, pH buffered solution to make a working stock. An ...
Sunday, March 22, 2015 by Baylee

science
1.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 salt water
Sunday, March 22, 2015 by HOMEWORK

science
5.At 3:15 one afternoon, the temperature over the land reaches its highest value for the day — about 89°F. The temperature over the adjacent water is about 72°F. What would the expected weather conditions be at this time? A. Cloudy skies and a sea breeze B. Clear ...
Saturday, March 21, 2015 by Angelina

science
At 3:15 one afternoon, the temperature over the land reaches its highest value for the day — about 89°F. The temperature over the adjacent water is about 72°F. What would the expected weather conditions be at this time? A. Cloudy skies and a sea breeze B. Clear ...
Saturday, March 21, 2015 by sam

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the ...
Saturday, March 21, 2015 by Isabel

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the ...
Saturday, March 21, 2015 by Isabel

science
The two systems shown below are identical except for the rod connecting the two beakers. Initially the temperatures of the beakers are as follows: Beaker A = 88°C Beaker B = 42°C Beaker C = 88°C Beaker D = 42°C Four minutes later the temperatures are as follows...
Saturday, March 21, 2015 by Isabel

science
Two insulated beakers contain different amounts of identical liquids. Beaker A contains twice as much liquid as Beaker B. The temperature of Beaker A is 80°C. The temperature of Beaker B is 40°C. An aluminum rod connects the beakers, and the system is left alone for ...
Saturday, March 21, 2015 by Isabel

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 85°C. The temperature of Beaker B is 40°C. A metal rod connects the beakers. Five minutes later, the temperature of Beaker A is 75°C and the temperature of Beaker B...
Saturday, March 21, 2015 by Isabel

life science,business studies,tourism and maths literacy
What can I become with this subjects?
Saturday, March 21, 2015 by calvin

science
The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to find when the ...
Saturday, March 21, 2015 by Isabel

life science,tourism,business studies,maths literacy
What can I become with this subjects?
Saturday, March 21, 2015 by calvin

Economics
China's slowdown Jan 20th 2015, 10:26 by S.R. | SHANGHAI MUCH of the analysis of China’s 2014 GDP data, which the government published today, has focused on the economy’s slowdown That is, on one level, understandable. Growth of 7.4% was China’s weakest in ...
Saturday, March 21, 2015 by Remi

Science
I answered the questions, but I don't know if my choices are right. 1) Which of the following is an acidic pH? 6 7 8 800 None of the Above Answer: 6 ------------------------------------- 2) Which of the following is directly produced by photosynthesis? Glucose and oxygen ...
Saturday, March 21, 2015 by Jane

science chemistry
Calculate the relative atomic mass of Limestone CaCo3 Methanol CH3oH Sulphric acid Ca(No3)2. (Ca=40.1,C=12,O=16,H=1,S=32).
Saturday, March 21, 2015 by compound

Genetics (science)
Please answer my science question (in detail if possible) Q: in rats the gene for black hair colour is dominant over the gene for brown hair colour. Draw a plunnet square and use it to predict the fractions of both the genotypes and phenotypes produced when two heterozygous ...
Saturday, March 21, 2015 by Chloe c

Science
hi could you please help with the following question: In humans, free ear lobes is dominant to attached ear lobes. A male who is pure breeding for free ear lobes marries a woman who is pure breeding for attached ear lobes. What type of ear lobes will the children. (Including a...
Saturday, March 21, 2015 by Lisa

science
Which statement is true regarding nuclear energy
Friday, March 20, 2015 by jay

Science
A switch is closed, a lamp turns on. The switch opened, and the lamp turns off. What does that suppose to mean..?
Friday, March 20, 2015 by Thi

Science!
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...
Friday, March 20, 2015 by Bella

Science
A parallel connection of several lamps in a home allow you to control each lamp independently with switches. How is this possible?
Friday, March 20, 2015 by Thi

science
I'm doing a lab for Le Chatelier's Principle. I'm concerned that all my answers sound very similar. Can someone help me and let me know if my answers are making sense? ~Thanks 1.) How is the reaction Zn(OH)2 <=> Zn^+2 + 2OH- affected by adding OH- I think ...
Friday, March 20, 2015 by Tammy

Science
A liquid solution of formaldehyde is 37% pure. This solution has a specific gravity of 1.037. The molecular weight of formaldehyde is 30.0. To 1.00 ml of this impure stock solution is added quantity sufficient total the total volume to 500 ml. If 1.00 ml of this solution is ...
Friday, March 20, 2015 by Kara

Science, Physics
Concave mirrors can be used as for shaving or applying make up. The face must be inside the focus. You hold a concave mirror, with a focal length of 40 cm, about 30 cm from your face. Where is your image located? How much bigger than your face is the image?
Thursday, March 19, 2015 by Nora

science
7th Grade Sarah heated two cubes of aluminum to 50oC. Cube A has a volume of four cubic centimeters. Cube B has a volume of two cubic centimeters. If the cubes do not touch each other, which of these statements is true?
Thursday, March 19, 2015 by Dorothy

food science
A sample of grain in a bin is at 80.6 degrees F. The vapor pressure of water in the bin is 17.09 mm Hg. Assuming that the grain is well mixed, is the grain in danger of fungal growth and mycotoxin production?
Thursday, March 19, 2015 by Anonymous

Science
1. Which type of weather technology often carries cameras that can make images of Earth's surface, clouds, and snow cover? A. weather balloon B. weather satellite**** C. computer D. automated weather station 2. Why are weather forecasts more reliable now compared to ...
Thursday, March 19, 2015 by Bob

environmental science
what are the two main factors that determine where organisms live?
Thursday, March 19, 2015 by justice

science
Are there any websites that explain Mendelian genetics and show how to solve such problems in an easy, concise manner at an AP Bio level? Thank you
Wednesday, March 18, 2015 by Jason

Science
When is allergy season? Is it during the Spring?
Wednesday, March 18, 2015 by Anonymous

Science
what is the distance above Earth's surface?
Wednesday, March 18, 2015 by Judah

Science
the energy an object has due to it's motion is called a what?
Wednesday, March 18, 2015 by Lala

science- punnet square
If both parents have freckles but one of their children do not have freckles (ff). What are the geno types of the parents? Use the punnet square to help you. so since the child doesn't have freckles the geno type of the parents must be mother Ff and father Ff F f F FF Ff f...
Wednesday, March 18, 2015 by E6

Science
Explain the process of filtering blood
Wednesday, March 18, 2015 by Daisy

science
Which of these compounds would you expect to have the highest melting point: C2H6,CL2,AsCL3, BaBr2? Explain your answer
Wednesday, March 18, 2015 by Jada GOrdon

science
Calculate the concentration of all species in a 0.145M solution of H2CO3
Wednesday, March 18, 2015 by Kris

Science
What is a good experiment that shows light traveling in straight line until it hits a new medium?
Wednesday, March 18, 2015 by Hailee

Physical Science
3. What is the cracking and reforming? For what purposes are either or both used by the petroleum industry?
Tuesday, March 17, 2015 by Anonymous

Acrostic Poem Science!!
Sodium!! S- O- D- I- U- M-
Tuesday, March 17, 2015 by Valerie

Science
A scientist is trying to determine the identity of an element. It is highly reactive in water and forms an ionic bond with chlorine. It is also very shiny. The element is most likely A)from group 17 B)from group 1 C)from group 15 D)a noble gas Mrs. Sue Is it C?
Tuesday, March 17, 2015 by M

Science
Which is most likely to be part of an ionic bond? A. An atom with no valence electrons B. An atom with one valence electron C. An atom with two valence electrons D. An atom with three valence electrons I think it is B.
Tuesday, March 17, 2015 by M

Science
Which of the following is a pure substance? A. Chocolate milk B. Orange Juice C. Seawater D. hydrogen peroxide (h202) is the answer C.
Tuesday, March 17, 2015 by U.D.

Education
What is the most appropriate reason for having learning centers in the science classroom?
Tuesday, March 17, 2015 by Alicia

science
In which of the following statement the word light year is used correctly? (A) Ceres dwarf galaxy is 2.46 million lightyear away from us.(B) light travels with the speed of 1 lightyear in the universe (c) the next complete solar eclipse will be seen after 32 light year. (D) ...
Monday, March 16, 2015 by sanjay

Science
What kind of substance has properties that reflects light very well, warms up in my hand, flattens out when it hits with a hammer and conducts electricity?
Monday, March 16, 2015 by Karla

science
you are given a 1kg trolley and a trolley of unknown mass.explain how the mass of unknown . Explain how the mass of the known trolley can be determined if a mass-meter scale is not available
Monday, March 16, 2015 by ali

Science
A horizontal force of 24 N is being applied to a box on a level surface. The box is accelerating at the rate of2280889against a frictional force of 14 N. What is the mass of the box?
Monday, March 16, 2015 by Jabrika

Science
What is a four-cell battery with the cells connected in series with each other? How would it look like?
Monday, March 16, 2015 by Thi

science help
a 2500kg car moves at 15m/s 2; 15m/s2 is the __________ of the car
Monday, March 16, 2015 by Kennabug

Science
When a football is kicked into the air, it has a velocity of 32m/s at an angle of 25º. At the very top of the ball’s path, what is it's vertical velocity?
Monday, March 16, 2015 by Brenna

science
air masses that form over land are moist true or false
Sunday, March 15, 2015 by rezene

Science Help
A projectile is launched at 15 degrees and it's landing height is the same as the launch position. If this is true, then at what other angle can the projectile be launch to achieve the same horizontal displacement?
Sunday, March 15, 2015 by Steffi

science
Describe what happens to the electricity produced at 25kV by a power station when its transmitted to a house at 230 V many miles away.
Sunday, March 15, 2015 by sabrina

Science
A dicot seed is preferred over a monocot seed to observe seed structure because? a.Distinct embryonic axis or b.Proper sepration of cotyldeons
Sunday, March 15, 2015 by Mona

science
What is the mass of air in a room meauring 30 cubic meters if the density of air is 1.3kg per cubic meter?
Sunday, March 15, 2015 by shane

Science
fus = 12.5 and vap = 93.2 both j/k x mol Determine the entropy change when 7.30 mol of HCL(g) condenses at atmospheric pressure. my first answer was -91.3 but it keeps telling me that is incorrect and that delta Svap if scaled at 1.00 mol but needs to be scaled to 7.30 mol ...
Saturday, March 14, 2015 by Talaya

science
3.A weather station is located 300 miles directly east of a second station. Winds at the eastern station are blowing from the south. Winds at the western station are blowing from the north. What is true about the weather system near these two locations? A. A high-pressure ...
Saturday, March 14, 2015 by Angelina

science
The passageway that takes air from your throat to your lungs is called the pharynx*** larynx alveoli trachea
Saturday, March 14, 2015 by Anonymous

SCIENCE(CHEMISTRY)
calculate the mass of silver deposited when a current of 2.6a is passed through a solution of a silver salt for 70mins ag=108,1 faraday 96500
Saturday, March 14, 2015 by MIRACLE IWUNZE

Science
Which of the following may have happened if the inner planets had greater masses during the formation of the solar system? A. The inner planets may have been even smaller and rockier. B. The inner planets may have been larger and more gaseous. C. The inner planets may each ...
Friday, March 13, 2015 by Anonymous

science
Calculate the average speed of a water molecule (with a mass of 3.0e-26 kg) on the surface of Venus (730 Kelvin).
Friday, March 13, 2015 by A

Science
Which of the following planets is considered a rocky, or terristrial, planet? A. Venus B. Neptune C. Saturn D. Uranus Is the answer A? Thank you
Friday, March 13, 2015 by Anonymous

Science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?
Friday, March 13, 2015 by Zack

science
How many sex chromosomes are found in the reproductive cells of human being?
Friday, March 13, 2015 by sanjay

science
A charge of +9.0 nC and a charge of +4.0 nC are separated by 50.0 cm. Find the equilibrium position for a −1.0 nC charge as a distance from the first charge. The Coulomb charge is 8.98755 × 109 N · m2 /C 2 . Answer in units of cm.
Friday, March 13, 2015 by Julia

science
14. the sun's layer is called the photosphere . ( 1point) A. true b. false 15. meteoroids can form when comets break apart , creating dust clouds . ( 1point ) A. true b. false 16. a star is born whenever a nebula expands . ( 1point ) A. true b. false 17. a star system has ...
Friday, March 13, 2015 by Help me,plz

Science Help Please
Marie and Pierre noticed burns on their fingers after handling test tubes containing radioactive substances. This observation led to A. the discovery of natural fluorescence. B. the discovery of X-rays. C. the discovery of radiation therapy. D. the discovery of uranium. Is the...
Friday, March 13, 2015 by I'm Stupid

Science Help Please
Marie and Pierre noticed burns on their fingers after handling test tubes containing radioactive substances. This observation led to A. the discovery of natural fluorescence. B. the discovery of X-rays. C. the discovery of radiation therapy. D. the discovery of uranium. Is the...
Friday, March 13, 2015 by frazzled

Science Help Please
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength *** D.amplitude and frequency...
Friday, March 13, 2015 by frazzled

science
calculate the net force on an object that has a mass of 12kg and acceleration of 4m/sec
Friday, March 13, 2015 by Veronica

Science Help Please
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength *** D.amplitude and frequency...
Friday, March 13, 2015 by frazzled

Science Help Please
A weatherman reports, "The storm waves are about 2 meters high and about 25 meters apart." What properties of waves is the reporter describing? A. frequency and wavelength B. wavelength and wave speed C. amplitude and wavelength D. amplitude and frequency Is the ...
Friday, March 13, 2015 by frazzled

Science Help
A projectile that is launched at 15 degrees and the landing height is the same as the launch position. If this is true, then at what other angle can the projectile be launch to achieve the same horizontal displacement?
Friday, March 13, 2015 by Khloe

Science Help
Soundproof rooms take advantage of which property of waves? A. Absorption B. Regular reflection C. Refraction D. Diffuse reflection Is the answer C? Thank you for your help and time.
Friday, March 13, 2015 by Anonymous

Science - 7th grade (repost)
Can you check my homework? 38. How does natural selection lead to evolution? a. Organisms mutate to adapt to their environment. b. Helpful traits accumulate among surviving members of the species. c. Overproduction provides food for stronger members of the species. d. ...
Thursday, March 12, 2015 by Alexis

Science Check
Hi! Can someone check my answers? Thanks!! :) Question 1: A skateboarder (coasting with a constant velocity) jumps straight up. What happens she she lands? Does she come down.... A.) behind the skateboard B.) ahead of the skateboard C.) on the skateboard My answer: B. Question...
Thursday, March 12, 2015 by Tonya

Science Please Help Me
5. Which one of the following is not a cause of anemia? a diet lacking in iron and certain vitamins germs from someone with anemia inherited problems relating to red blood cells. loss of a large amount of blood 6. Which of the following carries blood to every part of the body...
Thursday, March 12, 2015 by SmartyPants

Science - 7th grade
Can you check my homework? (don't think I'd posted before) 38. How does natural selection lead to evolution? a. Organisms mutate to adapt to their environment. b. Helpful traits accumulate among surviving members of the species. c. Overproduction provides food for ...
Thursday, March 12, 2015 by Alexis

science Please Help Me
5. Which one of the following is not a cause of anemia? a diet lacking in iron and certain vitamins germs from someone with anemia inherited problems relating to red blood cells. loss of a large amount of blood 6. Which of the following carries blood to every part of the body...
Thursday, March 12, 2015 by SmartyPants

Computer Science
You try to run the CHKDSK utility from a command prompt but you keep getting an error message that you need to run it in Elevated Mode. How do you correct this? Reboot the computer in SAFE Mode and then run CHKDSK from a command prompt. Open command prompt from the Windows ...
Thursday, March 12, 2015 by Ally

Science
Can anyone help me find the half-life of strontium-90? I also need an explanation on how to do it. Thanks!! Radioactive Decay of Strontium-90: At 0 years: 100% remaining At 28 years: 50% remaining At 56 years: 25% remaining At 84 years: 10% remaining At 112 years: 5% remaining.
Thursday, March 12, 2015 by Jane

science. mrs.sue please help
14. the sun's layer is called the photosphere . ( 1point) A. true b. false 15. meteoroids can form when comets break apart , creating dust clouds . ( 1point ) A. true b. false 16. a star is born whenever a nebula expands . ( 1point ) A. true b. false 17. a star system has ...
Thursday, March 12, 2015 by Hannah

Physical Science (H)
A container of milk holds 3640 g of milk. The density of the milk is 1.02 g/mL. What is the volume of the milk in the container?
Thursday, March 12, 2015 by Hezakiyah

science
What is the difference between apparent and absolute magnitude
Wednesday, March 11, 2015 by gamer65

Science - 7th grade
Can you check the following? Experiment A: Four groups of rats are first massed and then fed identical diets except for the amount of vitamin A they receive. Each group gets a different amount. After three weeks on the diet, the rats’ masses are measured again to see if ...
Wednesday, March 11, 2015 by Alexis

science
describe 4 different types of satellites
Wednesday, March 11, 2015 by gamer65

science
what is a humble telescope
Wednesday, March 11, 2015 by kevenhotdog74@

science
What advantages of space probes
Wednesday, March 11, 2015 by kevenhotdog74@

physical science
most electricity generated in the united states comes from?
Wednesday, March 11, 2015 by linda

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