# chemistry! URGENT

60,412 results, page 15

### PHYSICS(URGENT)

A body of mass 0.5 kg is thrown vertically upwards with a speed of 10 m/s. Determine: a.The initial kinetic energy of the body b.The gain in potential energy when the body has reached its maximum height c.The maximum height reached above the starting position

### English - Very urgent

How can i reword this to make it stronger. My weapon, so cleverly disposed of, shattered his skull. Broke it in to pieces. The cradle, the shield, the host of the brain he used to think he could ever leave me. My weapon, meant to be his supper. A delicious one, even last ...

### English-urgent

1) This puts the integrity of the material into question. or 2) This puts the integrity of the material in question. Which is correct?

### algebra URGENT!

Solve the system using elimination. 2x – 2y = –8 x + 2y = –1 And this one: Solve the system using elimination. 3x – y = 28 3x + y = 14 Pleease help me :(

### science URGENT!!

what is the relationship does wave height have with frequency? What is the relationship does wave height have with amplitude?

### Math- urgent

Harry buys American cheese at the deli. He buys 1/4 pound at the cost of x dollars per pound. If he pays $12.25 for 2.5 pounds of cheese, what is the cost per pound? Please show your work.

### Math URGENT!!

A rectangular garden has an area if 12a^2-5a-2m^2 A.) Write the area as the product of two binomials with integer coefficients B.) the garden is to be completely enclosed by a path 1 m wide. find and simplify an expression for the area of the path C.) the path is concrete, ...

### URGENT!!!!!! science.....hurry!!!! please

The elements from which of the following groups are most liekly to react with potassium(K)? A. Group 2 B. Group 7 C. Group 13 D. Group 17 I think it is either A or D. Look at your periodic table. www.webelements.com K is a metal. It will react with non-metals. Which group do ...

### SCIENCE-Urgent

Right now I'm studying photosynthesis in Biology. We have to design an experiment that would prove how light reactions occur prior to carbon fixing reactions. I know how light and carbon fixing reactions work, but how can I prove this experimentally? Are there any experiments ...

### Urgent math

For his services, a private investigator requires a $450 retention fee plus $95 per hour. Let x represent the number of hours the investigator spends working on a case. (a) Find a function f that models the investigator's fee as a function of x find f(x) find f^-1(x) find f^-1...

### please help urgent

A couple needs a mortgage of $300,000. Their mortgage broker presents them with two options: a 30-year mortgage at 8 1/2% interest or a 15-year mortgage at 7 3/4% interest. (Round your answers to the nearest cent.) (a) Find the monthly payment on the 30-year mortgage and on ...

### Urgent--Geometry(trig part)

So I am new to sine, cosine, and tangent, so I need some help. Just explain it. No need for the answers unless you want to give it to me. :D Let triangle ABC be a right triangle with angleC=90degrees. Given the tangent of one of the complementary angles of the triangle, find ...

### Urgent Language Arts

1) Which of the following sentences from "I know Why the Caged bird sings"contains context clues that help you understand the meaning of the word in italics? "Shame" made me want to hide my face.* She didn't " encourage" familiarity. The dress looks "professional". The "...

### chemistry

I have a chemistry project where I need to make an object move using my knowledge of chemistry. The object os a small ball the size of a large marble. It must be moved using chemistry and NOT physics (ie slope wind etc). I am 15 and in grade 11.

### Accounting

At December 31, 2007, before any year-end adjustments, Bollis Company's Prepaid Insurance account had a balance of $2,700. It was determined that $1,500 of the Prepaid Insurance had expired. The adjusted balance for Insurance Expense for the year would be?? plz help urgent

### physics (urgent)

onsider the following velocity time graph: (I sent a separate link of the picture as it wouldnt allow me to send it in this box) a)Describe the motion of the object from time t_0 to time_1. b)List two pieces of information (other than speeds or velocities) that can be obtained...

### Science help urgent :/

What has been the general trend in human population growth? A.) The human population has decreased. b.) The human population has remained constant. C.) The human population has grown exponentially. d.) The human population has increased and then decreased significantly.

### math PLEASE URGENT

if normal blood cholestrol level is 5.8 mM and a treatment caused a drop of 1.0 mM with a standard deviation of the difference of 2.0 mM what is the minimum number of individuals that should be used in the drug trial to determine whether or not it is effective i know you have ...

### Chem Uni. Urgent!!!

Have to find theoretical yield of recrystallization of acetanilide from water. 1 gram of crude product used (85% acetanilide, 14% Sodium chloride and 1% charcoal) I got 0.50 grams of purified product. With percent recovery of : (0.50g/1.00g)* 100% = 50%. How do I find the ...

### Honors Biology - URGENT!!!

After a biochemical analysis of the victim's tissues, brilliant biologist/criminal investigator J. C. Mickleberry announced his findings: "Contrary to the conclusions of the police, the victim did not suffocate. The electron carriers in his mitochondria were all in the ...

### Math

URGENT! In a school, 8% of students are left handed. If 50 classes of 20 students are randomly selected, what is the probability of 10 classes have no left handed students? I know that this is a binomial distribution question, but I can't seem to do this question even though I...

### Physics - URGENT

A water balloon is launched at a speed of 23 m/s and an angle of 36 degrees above the horizontal. The water balloon hits a tall building located 20 m from the launch pad. At what height above the ground level will the water balloon hit the building? Calculate the answer in ...

### Physics Urgent!!!!!

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by ...

### Chem Urgent

Volume of stock solution a. 5.0mL b.10.0mL c.15.0mL d.20.0mL Prepare 25mL of each of the four different dilute solution Concentration of stock- 1.01E-5 Calculate molarity for a,b,c,d Molarity=m1V1/V2 for a would the answer be 2.02E6????? (1.01E-5)(5.0)/(25.0)

### URGENT LANGUAGE ARTS

Which sentence has a misplaced modifier? A. Covered with mold and dust, Mr. Rudolph examined the old textbooks on the shelf. B. I think that my favorite teacher will be Mrs. Alvarado, who is from Guatemala. C. Slowly walking through the crowded hallway, Darlene clutched her ...

### English (EXTREMELY URGENT)

Please help he answer this one question. Which detail best describes why the author discusses the history of rap music. To show the extreme poverty of certain regions To explore the tension amongst certain cultural groups To expose events that are rarely discussed To give the ...

### physics(urgent help)

a) Find the magnitude of the electrostatic force between 2 negative charges separated by a distance of 1augustro. b)what is the magnitude of gravit'l force between the negetive charges (electro)? c) determine the ratio of the gravt'l force and electrostatic force. ((Help with ...

### Earth Science

PLEASE HELP! URGENT! 7. Which letter arrows point to hanging valleys? 8. Which letter arrows point to aretes? 9. Name a peak on the map that is a horn. 10. Feature E on the map is composed of glacial till. What type of glacial feature is E, and how did it form?

### Pictures (URGENT)

I need to draw pictures that represents the weather, for a poster assignment. But I'm having trouble with hot and sunny. what 2 different pictures can i draw to represent them? Also, cold, snowing, and windy. I need 3 different pictures to represent them as well? any ideas ...

### differential equation urgent !

Driver A had been leading archrival B for a while by a steady 3 miles. Only 2 miles from the finish, driver A ran out of gas and decelerated thereafter at a propertional to the square of his remaining speed. One mile later, driver A's speed was exactly halved.If driver B's ...

### Career Urgent

Why do you need to take a business course to become web designer/developer? I know it's a skill but what does it do? I answer why do web designer/developer need math and computer-related courses and now I need why do you need business. please help and thank you

### Math- urgent

Vong grilled 21 burgers at a block party. He grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 pound and each hamburger weighed 1/3 pound. How many of each did Vong grill?

### British Lit----URGENT

In James Joyce's "The Dead," Gabriel experiences an epiphany. This helps to make him a A)flat character B)stereotype C)round character D)supernatural being. I feel in the story he is a round character but I am not sure if the epiphany makes him a flat or stereotype character? ...

### Math (Need help Urgent)

1. Fireworks are to be launched from a platform at the base of a hill. Using the top of the platform as the origin and taking some measurements, it was determined that the cross-section of the slope of one side of the hill is y=4x-12 . If the path of the fireworks is y= -x^2+...

### [Urgent] Economics - GDP

(Quantity, Price) 2000 ...Popcorn: (200,$1) ....Novels: (50,$20) .....Shoes: (8,$100) 2001 ...Popcorn: (250,$2) ....Novels: (30,$25) .....Shoes: (10,$80) If 2000 is the base year, what is the real GDP in 2001?

### chem urgent!

Set up a Hess's law cycle, and use the following information to calculate ÄH°f for aqueous nitric acid, HNO3(aq). You will need to use fractional coefficients for some equations. 3 NO2(g) + H2O(l) 2 HNO3(aq) + NO(g) ÄH° = -138.4 kJ 2 NO(g) + O2(g) 2 NO2(g) ÄH° = -114 kJ ...

### Urgent : Electricity and Magnetism

Two charged spheres are kept at a great distance from each other. Sphere A has charge +20q and sphere B has charge -14q. A neutral conducting sphere, sphere X, is then touched upon the sphere A, then sphere B, and X, repectively, after these q(a),q(b) and q(x) are the charges ...

### urgent i need help within an hour!

Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 83.3 g of ascorbic acid dissolved in 210. g of water has a density of 1.23 g/mL at 55°C Calculate the molarity of ascorbic acid in this solution. i got 2.77 but its wrong

### Math Quadratic Equations . URGENT!!!!

A toy rocket is launched form a 3m platform, at 8.2m/s. The height of the rocket is modelled by the equation h=-4.9t^2+8.1t+3 where h is the height, in metres, above the ground and t is the time, in seconds. After how many seconds will the rocket rise to a height of 6m above ...

### Physics

Help imediately please very urgent! A stone is dropped from a cliff 200m high,if a second stone is thrown vertically upwards 1.50sec after the first was released,strike the base of the cliff at the same in stant as the first stone,with what velocity was the second stone thrown?

### maths urgent help!

The average mass of 2 durians and 3 apples is 1.85kg. The average mass of 3 durians and 3 apples is 1.92kg. What is the mass of 1 durian?

### urgent maths

write the complement of: 1.(xdegree+5degree) 2.(24+a)degree 3.(1/4) right angle write the supplement of : 1.(27+a)degree 2.(7/8)right angle 3.(1.4)right angle 4.(54degree27minutes)

### Algebra 2: Radicals URGENT!!

Could some kind, saintly soul help me solve this problem? Simplify: 8w sqrt(48w^5) - x^2 sqrt(3xw^2) . . =8w(√16)(√3)(√w^4)(√w) - x^2(√3)(√x)(√w^2) =32w^3(√3w) - wx^2(√3x) not much of a "simplification" really 8w sqrt(16*3w...

### MATHS HELP URGENT(TIME AND WORK)

A can do a piece of work in 12 days whereas B can destroy the work in 3 days. A does the work for 10 days and then B destroys the work up to 2 days. In how many days will the work be finished?

### Science(Urgent)

1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the ...

### Maths ( urgent help )

20 men can do a piece of work in 24 days. After working for 6 days, an additional number of men are taken to finish the work in 21 days from the beginning. Find the number of additional men . . . I tried using variation method but the answer didn't come correct :(

### Urgent CALCULUS

So, I haven't posted in a while...but now I am stummped! Only question I can't get today! A team of students seeks to make a flag representing their commitment to the earth. They will be using a green triangle inscribed in a yellow semi-circle. Find the maximum area of the ...

### 11th grade English urgent

actually i am not clear about the question too. we have done a story of N. Scott Mamaday where he describes about his horse which he later sells to a Spainish man. He says " I knew where the journey was begun, that it was a learning of the beginning, that the beginning was ...

### Bio-URGENT

OK i did a lab in which we had to calculate the rate of reaction by observing how much gas was produced by the experiment. to do this we used a ubside down graduated cylinder in a tub of water and placed a gas collection tube between the testube and the graduated cylinder WHat...

### Chem Very Urgent

if 4.55 g of sodium sulphide and 15.0 g of bismuth nitrate are dissolved in separate beakers of water which are then poured togehter, what is the maximum mass of bismuth sulphide an insoulble compound that could precipitate? Which reactant was the limitting reactant? Na2S + Bi...

### Urgent need help on chem please someone

A researcher explores the ideal gas equation. He measures the pressure of a system at different temperatures ( keeping the volume and moles of the gas constant) and creates a plot of P versus T. What is the slope of the line that results if the volume is 1.0L when 1.0 mol of ...

### English

How has francis ford coppola used film techinques to convey the italian mafia that existed in the 1900's? hi there i already started the essay, however, i am quite confused as to how to write it into exact essay format. i have already written all my ideas down and im in urgent...

### Quick Question #2 (URGENT)

How would show/ask 'What is your phone number?' in symbols and pictures. Would having a picture of a telephone and the number sign beside it, and write equal sign then question mark demsonstrate this question? Example: phone pic (#)=? If my idea doesn't demonstrate the ...

### math urgent please

i think I know the answer to this question but could u please explain it to me how much smaller is the digit in the thousands place than the digit in the ten thousands place in the number 55,512 is the answer 10. could u help explain it

### Physics URGENT!!!

A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...

### MATH URGENT

A submarine was floating on the water. It went under the water at a rate of 0.5m/second for 3 minutes. It then started to rise towards the surface at a rate of 0.7m/second for 1.5 minutes. What is the depth of the submarine? The hint my teacher gave me was: make sure your ...

### Math HELP ASAP

simplify: (75x^3 y / 3x^5 y^3) ^3/2 3500 tickets were sold at the carnival. Adult tickers are $35 each and the children's are $20 each. A profit of 10% adult tickets were made and a profit of 5% children tickets. A total profit of $620 was made. Write 2 equations that ...

### Urgent math

The initial size of a culture of bacteria is 1000. After one hour the bacteria count is 4000. (a) Find a function n(t) = n0ert that models the population after t hours. n(t) = b)Find the population after 1.5 hours. (Round your answer to the nearest whole number.) n(1.5) = ...

### chemistry/stiochiometry

could someone please answer my chemistry/stoichiometry questions below both "anonymous one just chemistry on todays date

### CHEMISTRY!!!!! HELP!!

I'm looking for a chemistry and applied chemistry textbook that had been published between 2011-2014. Please help because I couldn't find one on google.

### Chemistry Urgent

1) 30cm3 of methane and ethane mixed with 100cm3 of O2 at RTP. Explosion occurs, on cooling 61.5cm3 remained. Find the percentage by volume of each gas in the mixture 2)32cm3 of a mix of CO2, CH4 and H2 mix with 50cm3 of O2 and exploded after cooling to RTP, volume noted is ...

### Physics URGENT!!!

A spring of negligible mass stretches 2.14 cm from its relaxed length when a force of 8.40 N is applied. A 1.300 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin to x=5.00 cm and ...

### Chem Lab Help- Check Urgent

Suggest another solvent you might use instead of ether. Explain your choice giving the advantages and disadvantages of your choice. I said: Toluene Advantages are: -the vapor pressure of Toluene is less -the freezing point is much lower -low polarity -immiscible in water ...

### Biology URGENT

What are Chroobacteria, Hormogoneae, and cleeobacteria? Spelling suggestions are welcome. Chromobacteria, Hormogonia are the spellings. I don't know about the others. Thank you. Do you know where i could find some info on them? wikpedia Thanks but no thanks. Wikipedia has not ...

### History (its urgent)

can u plzz help me find good websites to sumarize this ive been looking everywhere but cant find anything... 1) DESCRIBE ENGLAND WHEN HENRY VIII RULED 2) WHAT EDWARD VI ACHIEVED WHEN HE RULED 3) DESCRIBE ENGLANDS EFFECTS WHEN HENRY VIII DIED and if u guys find any info that u ...

### URGENT - history

Heya The Cartoon on Getty Images, Cosy Communist circa 1940. I'm trying to find where it was originally published and who originally drew it so that I can put that in my research journal. We are graded on our research journal and it documents like all our research. I need to ...

### math URGENT!!!!

the midpoints of the sides of a triangle are (1,1),(4,3),and (3,5). find the area of the triangle. please answer and show how u did it step by step please!!!! how do i find area of the smaller triangle?

### URGENT, Calculus!

A science project studying catapults sent a projectile into the air with an initial velocity of 30 m/s. The formula for distance (s) in meters with respect to time in seconds is s = -4.9t2 + 30t. Find the instantaneous rate of change (and thus the velocity at any time) using ...

### urgent help statistic

A random sample of 20 people who resided within the u.s resulted in average viewing time of 4.76 hrs per day with a sample standard deviation of 2.297 hrs. obtain and interpret a 95% confidence interval, for the mean viewing time of all americans confidence interval: Interpert...

### AD Analysis (URGENT)

I have to do an ad analysis on alcohol and I've decided to use a GREY GOOSE vodka ad. Here's the question I'm having trouble with. Why do you think the person who created this ad has presented substance use in this way? I don't know how to answer it. All I can think of saying ...

### Urgent Math

A large rectangle is divided into 4 non-overlapping smaller rectangles by two lines. One line is parallel to the base, and the other line is parallel to the height. If the areas of three of the small rectangles are 18,24, and 40, compute the only possible integer solution for ...

### Physics Urgent please help

A figure skater stands on one spot on the ice(assumed frictionless) and spins around with her arms extended. When she pulls in her arms, her moment of inertia decreases to 3/4 of the initial value. Assume that her spin angular momentum is conserved. What is the ratio of her ...

### Math to Ms.Sue (urgent )

11. Lorenzo has a checkbook balance of $118.00. He writes two checks, one for $9.00 and one for $84.25. He then deposits $95.00. Finally, he uses his calculator to determine his new balance. Which one of the following series represents the correct order in which he should ...

### Chem URGENT!!

Which bond is most polar? F-Cl O-P O-S F-F Si-O Which species has the shortest carbon/oxygen bond? carbon monoxide carbon dioxide carbonate anion all carbon/oxygen bonds have same length Plz Help me with this....I need to see if I answered it right I put O-P for the first one...

### science URGENT PLEASE

A car travels 300 miles in 5 hours. what is the average speed? ___mph average speed per minute? _____miles per minute if the speed is constant how long dos it take for the car to travel 82 miles? _______minutes

### chemistry help urgent

Please can someone help me before i pull all my hair out i've been struggling with this for about a week CH2=CH-CH-OH ________' _______CH3 i need to polymerize this compound and draw the structural formula it needs to contain three monomer units and i need to state the ...

### algebra..urgent...

hi... i need help finding 2 equations that i would use for this elimination process.... this is what they gave me: * the sum of the digits i a two-digit is 14. If the 2 digits are reversed, the new number is 18 less than the original number. Find the original number. what two ...

### SCIENCE-URGENT

Right now I'm studying photosynthesis in Biology. We have to design an experiment that would prove how light reactions occur prior to carbon fixing reactions. I know how light and carbon fixing reactions work, but how can I prove this experimentally? Are there any experiments ...

### statistics

At a certain college, 15% of the students receieved an A in their required math cousre, 10% receieved an A in their required chemistry course, and 5% receieved an A in both. A student is selected at random. a.) What is the probability that he received an A in either chemistry ...

### Physics (URGENT!!!)

A sniper fires a bullet at 120 m/s at 30° above the horizontal from the roof top of a 35 m high parking garage. If the bullet strikes the level ground beside the parking garage: a) How long was the bullet in the air? b) How far from the base of the parking garage did the ...

### Physics URGENT!!!

A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 59 dB by an observer 14 km away. (a) What (b) What intensity level of the horns sound is observed by someone waiting at an intersection 46 m from the train? Treat the horn as a ...

### Physics URGENT!!!

A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 59 dB by an observer 14 km away. (a) What is the average power generated by the horn? (b) What intensity level of the horns sound is observed by someone waiting at an ...

### Math-Urgent please

Healthy food Inc sells 50lb bags of grapes to the military for $10 a bag. The fixed costs of this operation are $80,000 while the variable costs of the grapes are $10 per lb. Calculate the profit or loss on 12,000 bags and on 25,000 bags. Can you please walk me through on how ...

### Urgent help! Physics

A ball is kicked into the air with a speed of 10m per second at angle of 60 degrees to the horizontal (take g=10). a) Calculate the horizontal and vertical speed of the ball b) Calculate the ball's time of flight c) Calculate the distance from the kicked point that the ball ...

### Math Please it is Urgent!!!

11. Write a sequence of transformations that maps triangle ABC onto triangle A''B''C''. Here is ABC: A(1,8), B(3,12), C(4,4) Here is A''B''C'': A''(3,-3), B''(5,-6) C''(6,2) Please help I have tried everything and this is over due. There is no choicies bc i have to write them ...

### math- urgent help

For the following scenario, develop an equation and a set of 5 ordered pairs for equation: 1. the amount a sales person earns is a flat rate plus commission. 2. the volume of fuel in a snowmobiles tank related the distance travelled. 3. the cost of a hotel room is a flat fee ...

### maths urgent

The cost of 2 badminton rackets and 2 tennis rackets is $240. The cost of 3 tennis and 2 badminton rackets is $300. How much is a tennis racket?

### urgent -plsee

the cost of 6 cows are same as cost of 8 goats. if cost of 9 cows and twice numbered goats is rs. 9000, then find the cost of 3 cows and 6 goats?

### maths urgent

The average mass of half the number of crabs in a basket is 350g, the average mass of the remaining crabs is 300g. If the total mass iof the crabs in the basket is 13kg, how many crabs are there in the basket?

### english

this is a scene of the book Dawn Bosco's on her way to summer camp. She can't wait for the fun to begin, but when her shell mirror and a favorite pin disappear, it's time for the Polka Dot Private Eye to investigate. can you tell haiku poem for this scene and it should be ...

### PLIZ VERY URGENT

Use implicit differentiation to show that a function defined implicitly by sin x + cos y = 2y has a critical point whenever cos x = 0. Then use the first derivative test to classify those critical numbers that lies in the interval (−2, 2) as relative maxima or minima. ...

### Physics Urgent

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves like an ideal gas, ...

### Physics Urgent

A container of volume V = 103 cm3 has a mass of 30.0042 g when evacuated. When the container is filed with an unknown gas of pressure p = 4.72 atm at temperature T = 20oC, the mass of the system increases to 30.9508 g. Assuming that the unknown gas behaves like an ideal gas, ...

### math help urgent please

To enter a local fair, one must pay an entrance fee and pay for the number of ride tickets he/she wants. Admission to the fair is given by the equation f(x) = .50x + 10, where x represents the number of tickets purchased and f(x) represents the total price. How much does each ...

### Math algebra (urgent!) help me! Thanks a lot!! (;

Mr lol bought x oranges for $30 and sold them at a profit of 5cents per orange. Write down the (i)cost price of an orange. (ii)the selling price of an orange When he had sold all except 20 of the oranges, he found he had received $28. (iii) form an equation in x and show that ...

### Math College Algebra (urgent before 2hours)

Find the zeros of the following USE ALL THE THREE METHODS FOR EACH NUMBER ( Factoring, Completing the Squares and Quadratic Formula) 1.f(x) =3x+5 2.g(y)=y^2-3y+2 3.s(xl= -6x^2-13x+5 Please help me I need this before 2 hours to come. Please help me hpw to do this . Please help ...

### Biology---Urgent!

s this the correct way to cite a source using parenthetical documentation in my research paper? After millions of years the deposits end up in rock and sediment where oil is trapped in small places. Natural gas is a gaseous fossil fuel that is versatile and abundant. Like oil...

### Physics urgent!!!!

Electrons in a beam incident on a crystal at an angle of 30ͦ have kinetic energies ranging from zero to a maximum of 5500 eV. The crystal has a grating space d=0.5 Aͦ, and the reflected electrons are passed through a slit .Find the velocities of the electrons passing...

### SCIENCE-URGENT

So I'm in 7 grade and doing a science project. I have a question: What does it mean when it says: RESEARCH? I am required to have this on my board. Does it mean what I looked up to help me on this project? Also, what does it mean when it says: DATA? Do I just summarize what ...