# Science

## Recent Questions

science
The angle between incident ray and the mirror is 30° a. What is the angle of incidence b. What is the angle of reflection?

science
What is the Biosphere ?

science
Give five application of Doppler Effect in science

SCIENCE PLZ HELP YES OR NO ANSWER
DOES THE GALAXY ANDROMEDA HAVE A SUN? I THINK IT DOESN'T BUT IM NOT SURE PLZ HELP THX! ~Sparkles_01

Science
if you had a real thermometer that was accurate how could you modify your experimental thermometer to read actual temperatures

Science
2.)you had a real thermometer that was accurate, how could you modify your experimental thermometer to read actual temperatures?

science
how can I discuss how Mendeleev's periodic table relates with the modern one

Science
how does changing temperature affect inland and coastal areas? Please give me a brief explanation.

science
Calculate the emf of the cell CR|Cr3+(0.1M)||Fe2+(0.1M)Fe Given, E°Cr3+|CR = -0.75v E°Fe2+|Fe = -0.45v Cell reactn 2Cr(s)+3Fe2+(aq) -> 2Cr3+(aq)+3Fe(s)

science
Calculate the EMF of the cell CR|Cr3+(0.1M)||Fe2+(0.1M)|Fe Cell reaction- 2Cr(s)+3Fe2+(aq)->2Cr3+(aq)+3Fe(s)

Science
An organisms particular role in its habitat is or when and how it survives is called its what? A.carrying capacity

Science help ASAP
1. Carrying capacity is the maximum number of ____ that an ecosystem can support. A. Different species B. Individuals in a population C. Habitats D. Limiting factors

(1) The inputs for cellular respiration are: A) Nutrients and carbon dioxide B) Energy and carbon dioxide C) Nutrients and oxygen D) Energy and oxygen ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ My Answer: B ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ (2) The outputs for cellular respiration are A) ...

Computer science
I want to make my traffic lights run automatically without any user input. I have created this code so far but the images don't show up please help. My code: <!DOCTYPE html> <html> <head> <script type="text/javascript"> var lights=["red.jpg","redamber....

SCIENCE
I mix 300.0ml of the barium nitrate solution from 1c with 100ml of a 1.50M lithium phosphate solution. The reaction produces solid barium phosphate a. Write a balanced equation for the reaction. b. Which is my limiting reagent? c. How much barium phosphate may be produced in ...

computer science
Internet Service Provider An Internet service provider has three different subscription packages for its customers: Package A: For \$9.95 per month 10 hours of access are provided. Additional hours are \$2.00 per hour. Package B: For \$13.95 per month 20 hours of access are ...

Science
100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. Ans is 0.227M

Science
25 g of Iron (II) Oxide reacts with 25 g of Chloric acid to produce Iron (II) chlorate and water. a. Determine the limiting reactant b. Determine the excess reactant c. Determine the theoretical yield of water d. Determine how much excess reactant is left e. Determine the ...

Science
18 g of hydrochloric acid reacts with 15 g of calcium hydroxide produce calcium chloride and water.

Science
A sphere of mass 30.0 kg and radius 0.150 m is attached to a point on a smooth vertical wall by a string of length 0.150 m which runs from a point on the surface of the sphere to the point on the wall. Find the tension in the string and the horizontal force applied to the ...

Science
I need help on an I am poem for sodium can you help me ? Thank you for you time :)

science
The engine of 300kg dragster exerts an average of forward of 53000N over the first 20m of it's race.the dragster takes 0,8 sec to cover the first 20m calculate the work done by the engine

science
when solid aluminum is heated with chromium(II) oxide, solid chromium and aluminum oxide are produced. If you are using 125 g of aluminum and 225 g of chromium (II) oxide, how many grams of chromium are produced. If you actually collect 110g of chromium wht is the percent yield?

Science
A jar contains 100 mL or a 4.0 M silver nitrate solution. What mass of solid copper would you add to bring all the silver out of the solutions as a solid?

life science
Define the 2 concepts: fraud and corruption and and give examples of each

Science
Two charges +1C and -1C are placed at distance 1m apart ,each having masses 2kg respectively are released.what is the type of collision they experience?

Physical science
The bullet strikes a stationary of 5kg wooden block fixed to a flat,horizontal table.the bulletis brought to the rest after travelling a distance of 0,4m into the block.calculate the magnitude of the average force exerted by the block on the bullet

science
How many hydrogen atoms are present in 32 grams of methane?

Science
1. Which of the following could be an engineering project that could better protect the planet? -finding a new landfill site -designing a better trash compacter -deciding which product can be recycled*** -growing microbes that eat oil 2. Engineers who are working to find ...

science
explain why the surface tension of water is greater than that of methylated spirit?

Science
In which statement is the tanning me supporting facts and examples being used . A( … It was countries and then individual cities that had collections of exotic animals for people to come and see and they were no longer reserved for the wealthy rulers B( The zoo should be ...

Science
Which one of following could be the molecular formula of vitamin A? Options C20H30O , C12H18N4Cl2OS, C17H20N4O6, C9H17O5N.

1.the nose diaphragm and lungs are part of the_________system circulatory excretory nervous respiratory(my answer)

Science
What is the velocity of a block of wood 3.0 cm on each side that has a mass of 27g? Will it float on water?

math
Julian spent 45 minutes doing his math homework. He spent 35 minutes doing his science homework. Afterward, he did his reading homework. He ended up studying for 2 hours and 15 minutes altogether. How long did it take him to do his reading homework?

Science
what is the nature of mixture when 10gram ice is mixed at -20degree centigrade us mixed with 50gram at 120 degree centigrade?

Science
A man has a mass of 70 kg on earth .Calculate its mass and weight on moon

Science - Chemistry
Calculate the amount of energy a woman takes in during a year on a 2200kcal a day diet (1 calorie = 4.18J). Calculate the amount of energy she spends in driving 5000 miles a year at 40 miles to the gallon of octane, given 1 gallon of octane weighs 3.12 kg, and standard ...

Science- Density
I'm having difficulty understanding density. I am trying to relate the concept of density to brownies. Should a brownie with baking soda have a higher or lower density compared to a brownie with no baking soda? Does a thick brownie mean a high or low density? When it says high...

Science
Why is it important for the substances to start at the same temperature??

Science
I am doing an extension to get into the AP Biology course offered by my school. This particular extension asked me to use vinegar and baking soda aswell as some basic scientific tools to find the concentration of acetic acid in vinegar. I wanted to know what a procedure for ...

mathslit accounting life science tourism
what am I become with these sub guys help plz

Science
Four equal point charges each 16 microcoulomb are placed on the four corners of square of side 0.2m.Calculate the force on any one of the charge.

science
An athlete runs along a circular track of radius 20m.Calculate the distance and displacement covered by him after completing one and a half round.

science
A 5 C charged is placed on the 0 cm mark of a meter stick and a - 4 C charged is placed on the 50 cm mark what is the electric field at the 30 cm mark

science
H2SO4 is labeled 93.2% and density 1.94g/cm3. Find moles in H2SO4?

Science
What is conductor

science
what is the function of pore in a cell membrane

Natural science
What happens to the level of the salt solution in the distilling flask ? Explain why this happens

Computer science
How do I count how many arrays there is - what do I add to the code? I have managed to create 2 buttons and the top button works and changes the fruits into alphabetical order but the second button doesn't work - please help! <!DOCTYPE html> <html> <body> <...

life science, maths lit,agric,geography, life orie
Criticality discuss six way that human Rights violation influence individually, groups and broader south African community

science
6co2(aq)+ 12h2o(l) c6h12o6(aq)+6o2(aq)+602(a90 q)+6h2o

Science/Math
A car is travelling 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 at -4.0m/s^2

Science
An atom has a mass number 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.

science
describe fully the image of a candle flame located 10 cm from a concave spherical mirror with a radius of curvature of 16 cm

H/science
What Is Health Science

science
What will happen when titanium reacts with oxygen?

science
The cohrence length of a light source is 2.45×10raise to power-2 calculate width of spectral line

science
write down the possible terms of one electron system corresponding to n=2

science
find the energy of first excited state of helium

Science
17g of AgNo3 is trated with 25g of HCl. what is the mass of AgCl formed and what is the limiting reagent

Science
Workers needed to pass oxygen from lungs into blood vessels and welcome carbon dioxide into the lungs

Science
Andrew is 10 years old and loves to climb trees. Andrew fell while climbing his favorite magnolia tree and broke his ulna. The x-ray reveals that the injured ulna is broken into 4 small pieces. What type of fracture is this? a. incomplete b. complete c. comminuted d. ...

science help pls pls
Jupiter is 5.2 AU from the sun. What is its distance from the sun in kilometers? 28,846 km 78,000 km 28,846,153 km 780,000,000 km is it d pls help

Science/ Biology/ patho
3. A 32-year-old man comes to his physician complaining of frequency, dysuria, and urgency for several days, as well as pain in the perineal region. The digital rectal examination is extremely painful. He most likely has A. A primary chancre of syphilis in his genital organs B...

Science/Biology/Anatomy/Patho
10. Functions of the nephron include all of the following except A. Reabsorption of urea nitrogen B. Fluid homeostasis C.Maintaining electrolyte balance D.Regulation of blood pressure E. Maintaining blood pH I think A but really stuck between A & B

science
What are the factors that influence the rate of reaction??

Science
What is water vaper

Science
Hi, I have to revise for an upcoming test and I was a little bit confused about selective breeding. Please help Jiskha :)

science
the solubility of an unknown substance is 120 grams of water at 70 degrees celsius. What is it?

science help PLS
When Jane visits a beach, she notices a sea stack has formed offshore. Which of the following best describes what caused the sea stack to form? Erosion hollowed out the rock in a seaside cliff. Deposition moved sand from the beach into an offshore pile. A large number of ...

science
can you please tell me some alkalis you would have in your house xxx

Science
calculate the weight acting on an object of mass 10kg Taking g=10m/s

Science
what volume of NH3 gas at s.t.p. is required to neutralise 40cm3 of 2M H2SO4?

science
To conserve water, an animal's kidneys can pump ions across cell membranes, allowing water to move by

Political Science
You learned about the Democratic Peace Theory. Define this theory. Explain its strengths and weaknesses. Tell how it has been used to inform public policymaking. Now, explain whether you think it should be used in public policymaking, and why in a 250-300 words response.

science
when copper metal is added to silver nitrate in solution, silver metal and copper (II) nitrate are produced. what mass of silver is produced from 100.g Cu?

Science- Electric and Magnetic Potential Energy
1. At which position will the bar magnets most likely experience the least magnetic potential energy between them? D - position 4 2. A positively charged test object is moving toward the positive source charge in an electric field. B - It's potential energy increases 3. When a...

science-college physics
2. A certain wire of length L, cross-sectional area A is extended by an amount ‘e’ by a force F. Given that the young’s modulus of the material of the wire is E, Show that the; a. Energy stored in the wire is given by the expression (5) b. Energy per unit volume, Ev = x...

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 to ...

science
how to find a solution with high buffer capacity?

science
find the resistance of a nichrome wire of length 2.2m& diameter 2mm.

computer science
An Internet service provider has three different subscription packages for its customers: Package A: For \$9.95 per month 10 hours of access are provided. Additional hours are \$2.00 per hour. Package B: For \$13.95 per month 20 hours of access are provided. Additional hours are...

computer science
Write a program that will ask the user to enter the amount of a purchase. The program should then compute the state and county sales tax. Assume the state sales tax is 4 percent and the county sales tax is 2 percent. The program should display the amount of the purchase, the ...

science
a certain mass of gas occupies 600 cm3 and exerted 1.325*10^5 Nm^-2 pressure. at what temperature would the volume of the gas be halved?

science
of the following ,which do all fish have gills fins scales movable jaws (I chose )

I cant get this stupid question, this is disgusting and I just want to get this over with. What the word for when blood rushes towards your penis and gets bigger. A. Erection B. Sperm C. Vagina D. Puberty

science
what can you infer from the fact of all life on earth is related f you go back far enough?

Science
Write a paragraph or make a PowerPoint to explain how genetic variation and environmental pressures can lead to change in an organism. Write a second paragraph that describes an example of a plant or animal that has changed due to these factors.

Science
Daltons idea that atoms cannot be divided into smaller parts was was disproved by the discovery of______? The description of the structure of the atom is called the________? In a water molecule, two atoms of hydrogen and one atom of oxygen shared electrons. A _________ bond is...

science
What is osmosis

science and calculations
Calculate the heat necessary to raise the temperature of 500kg of water in the generator of the refrigerator from 10degree Celsius to 40degree Celsius. The specific heat capacity of water equal to 4.2kj/kgk

science-college physics
1. A mass of 20 kg is suspended at the end of a rubber cord of diameter 2.0 mm and length 100 cm. Find the period of vertical oscillations of the mass. [Take young’s modulus E, for the rubber = 2.0 x 108 Nm - 2].

Science (energy)
1. What similarities do nuclear energy and chemical energy share? Choose all that apply. A. Both are types of kinetic energy. B. Both are types of potential energy. [CORRECT!] C. Both involve magnetic energy. D. Both involve stored energy. [CORRECT!] 2. A student is trying to ...

physical science
How long will a 1.2 kW electric kettle take to heat 0.8 kg of water from 20°C to 100°C?

science
a boy whose mass is 69kg climbs a tree 10m high in 12s .calculate the work done and power developed

Science
What obstacles did Darwin's theory of natural selection and evolution face and how did he overcome these? I know one would be scientists in those days having different theories (obstacle)...

Science
Why the earth rotate each 24 hours?

Science
A man walks 5m towards east and turns right and moves 12m. The magnitude of displacement is

science
carbon moboxide reacts with hudrogen to produce methanol chemical equation: balanced equation:

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