Science

Recent Questions

Math/Science
How do you convert millimeters to micrometers? For 10 mm, I got .010 micrometers, but I'm not sure if that's right.

Science The Human Body PLEASE HELP!!!!!!!!!!!
the human endocrine system is made up of which of the following structures? (1 point) vessels receptors* glands chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood to ...

Physical science
which liquid evaporates fastest between water , ethanol , nail polish remover and methylated spirits

science
how does amavasya and pournami occur.

science
A bird flying west at 35m/s dives south at 35m/s. Did the bird’s velocity change, if so how?

Science
How can I find the potential difference? It's a parallel circuit. R1, R2 and R3 is 0.3 and the current is 8.0. Is the volts 8.8?

science
what is electrical deduction?

Science
Describe the life cycle of a parasite that relies on its host for part of its reproductive cycle. human and mosquito???

Science
1. Air masses that form over land would be mostly A. Warm B. Cold C. Dry* D. Wet 2. Air masses that form over oceans or seas would be mostly A. Warm* B. Cold C. Dry D. Wet 3. Air masses that form over northern locations would be mostly A. Warm B. Cold* C. Dry D. Wet 4. Air ...

Science
Describe the life cycle of a parasite that relies on its host for part of its reproductive cycle. I was thinking a mosquito and human but i don't know how to describe it.

Science
london england is approximately 51° north latitude 0° longitude. binghamton new york is about 42° north latitude 76° west longitude why does binghamton have colder winters?

Physical Science
I have no idea how to do this, and I'm not sure what the formula is. Here's my question: In space, there is almost no air, so there is virtually no friction. If an astronaut throws a ball in space with an initial velocity of 3.0 meters per second to the west, what will the ...

Science
A 2000 kg car is rolling at 3 m/s. You would like to stop the car by firing a 10 kg blob of sticky clay at it. How fast should you fire the clay? How much energy is required to accelerate the clay to this speed?

science
a person rolled a large ball across a field. What information is needed t determine how much work the person did?

Science
How does Science impact you? I said that it prepares you for a career in the medical field,gains knowledge... can you help me find 3 better reasons???

Physical science
An astronaut on a space walk bumps the shuttle and starts moving away at a velocity of 0.02m/s. The astronaut's mass is 100kg. He takes a 1kg "safety weight" and shoves it away in exactly the direction of his motion at a speed of 6m/s. at what speed does the astronaut move ...

Science
Which has a greater total resistance, a series circuit or a parallel circuit and why? I know i have repeated this question again, but I need someone to help me..

Science Check Please Dr.Bob222
I am sorry would..Hopefully this would make it easier 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 ...

science asap
1) How do decomposers increase the fertility of soil? A) By storing moisture in the soil. B) By breaking down and digesting the remains of dead organisms. C) By making spaces for air and water. D) By burrowing deep below topsoil. I am thinking is is either B or D, but I do not...

science
If I fire three arrows at 20 degrees, 40 degrees and 60 degrees, which arrow will go the farthest?

science
1) How do decomposers increase the fertility of soil? A) By storing moisture in the soil. B) By breaking down and digesting the remains of dead organisms. C) By making spaces for air and water. D) By burrowing deep below topsoil. I am thinking is is either B or D, but I do not...

Science
Which has a greater total resistance, a series circuit or a parallel circuit and why?

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?!?!

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

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 main ...

science
based on the masses of CaCl2 and Na3PO4 you determined from the periodic table, what mass combining ratio would you predict?

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 lever...

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 ...

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 ...

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 ...

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?

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?

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 ...

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

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 skies and...

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 skies and a...

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 system ...

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 system ...

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: Beaker A...

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 several ...

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 is 50°C...

life science,business studies,tourism and maths literacy
What can I become with this subjects?

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 system ...

life science,tourism,business studies,maths literacy
What can I become with this subjects?

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 24 years (see ...

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 ...

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).

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 ...

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...

science
Which statement is true regarding nuclear energy

Science
A switch is closed, a lamp turns on. The switch opened, and the lamp turns off. What does that suppose to mean..?

Science
A parallel connection of several lamps in a home allow you to control each lamp independently with switches. How is this possible?

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 since we are ...

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 ...

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?

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?

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?

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 hundreds ...

environmental science
what are the two main factors that determine where organisms live?

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

Science
When is allergy season? Is it during the Spring?

Science
what is the distance above Earth's surface?

Science
the energy an object has due to it's motion is called a what?

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 Ff ...

Science
Explain the process of filtering blood

science
Which of these compounds would you expect to have the highest melting point: C2H6,CL2,AsCL3, BaBr2? Explain your answer

science
Calculate the concentration of all species in a 0.145M solution of H2CO3

Science
What is a good experiment that shows light traveling in straight line until it hits a new medium?

Physical Science
3. What is the cracking and reforming? For what purposes are either or both used by the petroleum industry?

Acrostic Poem Science!!
Sodium!! S- O- D- I- U- M-

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?

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.

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.

Education
What is the most appropriate reason for having learning centers in the science classroom?

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) ...

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?

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

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?

Science
What is a four-cell battery with the cells connected in series with each other? How would it look like?

science help
a 2500kg car moves at 15m/s 2; 15m/s2 is the __________ of the car

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?

science
air masses that form over land are moist true or false

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?

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.

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

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?

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 ...

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 ...

science
The passageway that takes air from your throat to your lungs is called the pharynx*** larynx alveoli trachea

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

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 ...

science
Calculate the average speed of a water molecule (with a mass of 3.0e-26 kg) on the surface of Venus (730 Kelvin).

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

Science
Why is photosynthesis an example of a chemical reaction, and why is it classified as endothermic?

science
How many sex chromosomes are found in the reproductive cells of human being?

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.

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 at ...

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...

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...

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 2. ...

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