Science

Recent Questions

science
If you had a real thermometer that was accurate, how could you modify your experimental thermometer to read actual temperatures?

PUBLİC LAW, Political science, ir
You are a Spanish conquistador who just took control of a large territory in Americas in medieval time. Which political concept requires you that you should obey the orders of the Spanish King and not to administrate the land on your own??(this question is for my public law ...

Science
Which of the following is NOT a characteristic of an animal? Have eukaryotic cells digest their food make their own food******* have many cells with different functions

Science
How do you find the half life of strontium 90? I know that the answer is 28.8 years but how do you arrive at that answer?

science
Determine the amount of NaoH dissolved in 250ml of the solution by titrating it against N/10 H2so4 solution

science
three equal charges 2.0×10^-6 each ae held

Science
Say we have a jar of water, Is the angle of incidence, the angle that the the light enters the water, the angle above the water or the angle below the water?

Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ...

Science
Since no one answered, and I really need help: So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have ...

science
In which temperature of water did the food coloring diffuse faster?Using your knowledge of the motion of molecules, explain the result

Science
So I am doing this science experiment about light. I chose to do one where you put a pencil in a glass of water and the light makes it look like it's bending. There is a chart of measurements that you need to fill out and I have no idea how to get them. I know you are gonna ...

Science
What is the mechanical advantage of a machine that used 600N to overcome a load of 1200

Forensic Science
If there are 45 drops of alcohol/mL, and the density of alcohol is 0.789 g/mL, what is the blood alcohol concentration of your unknown sample?

science (please please please help)
3. Nitrogen-fixing bacteria live in protective nodules (bumps) on the roots of some plants. These bacteria are able to convert gaseous nitrogen from the air into a form of nitrogen that the plants can use. Which type of relationship is this? ~mutualism*** ~predation ~...

Science
The basic activities of life occur in the _______ nucleus DNA mitochondria cell****

History
What impact did learning about classical science have on chirstinaity

science
A researcher put 10.0 moles of N2O into a 2-L container at some temperature where it decomposes according to the following: N2O = 2N2+ O2. At equilibrium 2.20 moles of N2O remain. Calculate the Kc for the reaction. How am I supposed to fill in the ICE chart if Kc isn't given ...

Physical Science
If you know the rate of movement along a fault, the amount of offset over a period of time can be calculated. The basic relationship is Rate = distance/time Movement along the San Andreas Fault is about 3.5 cm/yr. If a fence were built across the fault in 2005, how far apart ...

Physical Science
If the mid-Atlantic Ocean is spreading at 2.4 cm per year, how many years has it taken for it to reach its present width of about 5000 km?

science
Height of object is 1 cm placed at a distance of 15 cm from a concave mirror of focal length 10 cm. Find nature, size and position

Science
You digestive system has three main functions: digestion, absorption, and elimination. In which organ does absorption begin? A. Mouth*** B. Stomach C. Small Intestine D. Gall bladder

Science
A Ball Thrown Vertically Upwards From Ground Level Hit The Ground After 4s Calculate The Maxium Height During This Height

Computer Science
Data packets travel from router on layers 3 and 4. As this happens their headers change. Explain why this is the case with reference to ip and mac adresses.

Science
The Richter Scale is based on measurements of the ____ of a seismic wave. A. Speed B. Frequency C. Intensity*** D. Amplitude

SCIENCE CHECK!
1. One of the products of photosynthesis is carbon dioxide.*** fire. oxygen gas. mass. Am I right?

Physical Science
At a crime scene, the forensic investigator notes that the 7.0-g lead bullet that was stopped in a doorframe apparently melted completely on impact. Assuming the bullet was fired at room temperature (20°C), what does the investigator calculate as the minimum muzzle velocity ...

science
What do the bone marrow and the epidermis have in commen

science
what energy source can generate most of my home's electricity day and night????

science,
how does a nuclear power plant produce energy

Science
a factor wants to build a big tank to store chemicals the tank will be near a river which of the following is a possible result of building the chemical tank a. the chemicals from the facility would not have any effect on the environment b) the chemicals will pollute the river...

Science
Water that contains impurities conducts electricity because _______ carry the charge

Science
How many grams of potassium iodide crystals is needed to make 1M.

Science
Which of the following is an example of density? A. Ice floating on top of a river B. Convection currents that cause wind C. Oil spill cleanup D. All of the above Pls help Idk this..

science (chemistry)
consider the following reaction AgNO3+KBr=AgBr+KNO3 calculate the amount of presipitate in gram obtained when 0.25 mole of AgNO3 is trheated with excess of aqueous KBr solution

Science
1. How did planetesmals form planets? A. They broke apart into smaller chunks. B. They collided and stuck together.<<(I think it's this answer) C. They cooled and pulled ice together. D. They began to rotate. 2. What distance was used to define the astronomical unit (AU...

Science
1.What challenges does [your topic] pose to biodiversity? 2.What do you think should be done and why? Can someone help me plz!! i have to write a discussion.

Chemistry (science)
Which compound is likely to have a lower melting/boiling point?Hydrochloric acid or Potassium sulfate? Justify. Now I know that hydrochloric acid has the lower melting and boiling point because it is covalent and potassium sulfate has an ion-ion force acting on it. But the ...

Science
What is the morality of a solution made by dissolving 9.80 g of H2SO4 in a 200.0 g of H2O?

science
What is the momentum of a 10 kg mass at rest.

Chemistry (science)
how does the compound type (ionic, polar, non-polar) correlate to its properties (melting/boiling points)? I have a feeling it's something related to the forces acting on them but I'm confused around how.

Chemistry (science)
how does the compound type (ionic, polar, non-polar) correlate to its properties (melting/boiling points)? I have a feeling it's something related to the forces acting on them but I'm confused around how.

Science
Can someone please explain? This tool is called a McLeod rake, a tool commonly used in fighting forest fires or wild fires. It is used to clear vegetation in order to make firebreaks, and also to cut off stray branches. The metallic head part of the rake is often made out of ...

Science
Describe the elasticity of a golf club hitting a golf ball

Science
Explain the difference between Type 1 (T1DM) and Type 2 (T2DM) diabetes. What are the common risk factors associated with T2DM? (Use the abbreviations for Type 1 & 2 diabetes mellitus in your response; don’t forget to define them the first time you use them in your response...

Science
Identify the following types of tissue as connective, muscle, nerve, or ephithelial: A. Tendon - Muscle B. Sciatic Nerve- Nerve C. Fat - ? D. Blood Vessel - Nerve E. Skin - Ephithelial F. Ligament - ? G. Bone - ? H. Muscle - Muscle ( I got them all except for Fat, Ligament, ...

science
If you were making a tool used to handle live electrical wires, which class of materials would you most likely use? ASemimetals BMetalloids CNonmetals D Metals

Science
Identify the following types of tissue as connective, muscle, nerve, or ephithelial: A. Tendon - Muscle B. Sciatic Nerve- Nerve C. Fat - ? D. Blood Vessel - Nerve E. Skin - Ephithelial F. Ligament - ? G. Bone - ? H. Muscle - Muscle ( I got them all except for Fat, Ligament, ...

Health Science
"What is diabetes mellitus? What are the complications of the disease if left untreated?" I need an A+ worth answer. 150 Words. I would really appreciate if I could get some help. Thanks.

math/science
If y is directly proportional to √x ,will on increasing y by 200%, x will become 4 times

Science) Breast Cancer
Can you give me some facts about breast cancer?

Science, Physics
A particle moves through angular displacement ø on a circular path of radius r. The linear displacement will be

Engineering Science N4
The diameter of the ram cylinder of a hydraulic press is 200mm. The stroke length of the plunger is 50mm. the effort on the plunger is 5% of the load. Calculate, i) the volume of the liquid needed per stroke if the load has to be lifted 60mm in 30 strokes, if the slip is ...

science
if a body of a mass 4kg is acted upon at constant force of 12n at 2sec,calculate the kenetic energy gain by the body.

Science unit 9
What would you do to measure the volume of a baseball

Social science
Most major cities in core countries are postindustrial. Can you think of an example of a growing city that is still in its industrial phase? How is it different from most Canadian cities?

Physical science
Which of the following is not a use for radioactive isotopes? a.as tracers for diagnosing a disease b.as an additive to paints to increase durability c.as a way to treat forms of cancer d.as a way to study biochemical processes in plants

science
A species that influences the survival of many other species in an ecosystem is called a____? I have no clue please someone help!

Science
The attitude adopted by Calvin Coolidge that government should play a small role in business affairs is know as what? A. Regulatory*** B. Progressive C. Laissez-faire D. Restrictive I took an educated guess.

Science---Hurry Please Help!
A solar eclipse can ONLY occur when the moon is in which phase? A) New Moon B) Full Moon C) Quarter Moon D) Crescent Moon A?

Science---Hurry Please Help!
When the Sun is completely blocked out by the Moon a ________________ occurs. A) total solar eclipse B) total lunar eclipse C) partial solar eclipse D) partial lunar eclipse A?

Science---Hurry Please Help!
Land near the ocean, along the coast, experiences weather that is more moderate than the inland climate. So, along the coast, you can predict that compared to inland weather, it should be __________ during the summer, and __________ during the winter. A) cooler; warmer B) ...

Science---Hurry Please Help!
If Earth were located where Mars is in space, the temperature of Earth would A) be significantly higher. B) be significantly lower. C) be about the same. D) fluctuate greatly. B maybe?

Science
Water on Earth is either freshwater or saltwater. What is the percent ratio of freshwater to percent saltwater on Earth? A) 1% freshwater : 99% saltwater B) 3% freshwater : 97% saltwater C) 30% freshwater : 70% saltwater D) 50% freshwater : 50% saltwater I think it is either ...

Science
The sun's apparent motion across the sky from East to West daily is due to the A) rotation of the sun. B) rotation of the earth. C) orbit of the earth around the sun. D) orbit of the sun around the earth. I think the answer would be c.

Science
Hi! I'm in 8th grade science 8-B in Connections academy. I have a question that I'm stuck on. Can anyone help me? Thx! 2. Where do most Earthquakes occur most often? Why I am taking a guess that areas such as California have more earthquakes than most. I don't know why areas ...

Science
Which is more harmful tannin or caffeine?

science
A man walk 3km East and 4km North what is his resultant displacement? Suppose he walks 3km and 4km 60 degree North of East. What is the displacement?

Science
Two trains are traveling towards each other, starting 100 kilometers apart. One train travels at 40 kilometers per hour while the other travels at 60 kilometers per hour. The plane starts flying at 90 kilometers per hour, starting from the location of the faster train. Once ...

Science
A student adds 5 g each of sand, sugar, and salt to 50mL of water. Did he make a solution? Explain.

Science
Identify the benefits that your space mission might provide for modern society. Explore the possibility of connecting your space mission with satellites that are already gathering information as they orbit Earth. i neeeeeeeeed help plzzzzzzzzzzz!!!!!!!!!!!!!!!!!!!!!

science
Where are the major zones of volcanism? Thanks!

science
parasitic worm infestation is hypothesized to be damaging to the host. However scientists have recently discovered that worm infestation of certain autoimmune disorders. in which of the following ways should the hypothesized to be modified , given the new findings A. worm ...

Science
For an organism that has a diploid number of chromosomes of 12, give the number of chromosome/chromatid copies at the end of the following cell-cycle phases: a) G2 phase b) Meiosis I metaphase c) Meiosis II telophase

Chemistry
a group of grade three students, along with their science teacher, were outside the classroom observing plant species. upon observation, the students recognized that some plant leaves were very pale yellow and weak looking while some looked healthy. suggest an appropriate ...

science
DNA is synthesized during which of the following stages of the cell cycle? Choose all that apply A.mitosis B.G2 C.S D.G1 E.interphase F. cytokineses I answered with A,C,E am I missing one? I am pretty sure I am

science
How are suspensions and solutions similar? How are they different? (can use a Venn diagram) I do not understand how these are similar.

Science
For an experiment, you place 15 g of ice with a temperature of -10 degrees C into a cup and label it A. You also place 25 g of ice at the same temperature into another cup and label it B. Which of the following statements is true? A. The average kinetic energy of the ice in ...

science discussion
What evidence is there that the human species has been successful so far? Explain. What environmental pressures in the past do you think were most important in shaping the human species as it exists today? What environmental pressures exist now that you think may be shaping ...

Science
anatomical differences of humans What possibilities and/or dangers does this difference imply for humans from other animals? Use the arms and hands

Science
A man whose is 75kg walks up a flight of 5.12 steps each 20cm hight in 5second. Find the power developed in walks.

Science
Dicot is to two seed leaves as blank is to one seed leaf.

Science
Two ofthe inner planets ____?

Science
The process of desertification can occur when? 1)plants usually found in the desert replace trees that have been cut down 2) farmers use contour farming techniques 3)an area of forest is clear-cut 4)an area of forest is selectively cut I think 3

science
would all of the lead (ii) bromide (ksp = 6.3 x 10^-6) dissolve if 2.25 g is added to 500 mL of water

Science
Three abiotic factors of about eastern himalaya

eec115 electrical and electronic engineering science
two capacitor having capacitance of 10uf and 5uf are connected in series and this combination is connected in parallel with a 20v supplies this parallel combination calculate the charge on each capacitor .the voltage across the 10uc capacitor.

Science
What is the name of experiment to show that a product obtained is a basic oxide 2Mgo+O2=2MgO

Science
A car starts from a stopped position at a red light. At the end of 60 seconds, it's speed is 30 meters per second. What is the acceleration of the car?

science
The small structures in the cell that carry out the cell's activities are known as?   The ____ can be described as the basic unit of life The jelly-like substance that fills the cell is called Mitochondria are responsible for

Science
An element has a half-life of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? Begin amount is 1.0 elapsed time is 90y half life 30 years n=9/30 n=3 90/2^2 90/8 = 11.25mg thinking it's wrong not sure what I missed...

Science Earths Evolution
Tell me what you think plz 1.The Reason why it was not a solid planet yet is because Rocks or asteroids were still being formed. All there was were Dust and Tiny Particles were forming the asteroids. This was probably in the Hadean Era Because it was long ago, That’s ...

Science
What causes lightning?

Science
Studies conducted in England during the Industrial Revolution have shown that children born to poor families were, on average, shorter than those born to wealthier parents. The most likely explanation for this difference in height is a difference in

science
Calculate the root mean square speed and most probable speed for co2 at25°c

Science
Which of the following can be used to explain why fossils of the same kinds of organisms can be found in different regions of the world? biogeography adaptation continental drift dispersal** Which piece of children’s’ playground equipment could be used to model and explain...

Science
Which word or phrase below best describes the function of the urinary bladder? Filter Storage tank Blender Passageway*** Help me please i am trying to check my test and make sure all the answers are right

science
Two copper globes are floating in space with a charge of -10 and charge of +16. They come together then go back apart. What are the resulting charges

Science I guess
So I have been reading the twilight series and I would like to know are you team Jacob or team Edward please bee nice (:

Physical science
Calculate the mass of carbon monoxide that was needed to produce 78 grams of methanol by the following reaction: 2H2+CO=CH3OH

Physical science
Determine the number of moles of sodium hydroxide produced when 2 moles of sodium and 3 moles of water react to form sodium hydroxide and hydrogen gas.

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