Reem

Newest questions posted by Reem
  1. Physics

    From the ideal gas law, calculate the volume per helium atom in a litre of helium gas kept at room temperature and atmospheric pressure. Additionally, calculate the length of the side of a cube with this volume.
  2. chemistry

    5. One hundred milligram of caffeine is dissolved in 50 mL of water. a. How many mg of caffeine will remain in the water if you extract with 20 mL of methylene chloride? Show your calculations (KD = 4).b. How many mg of caffeine will remain in the water if
  3. chemistry

    Choose the pair of substances that are most likely to form a homogeneous solution. N2O4 and NH4Cl C6H14 and C10H20 LiBr and C5H12 C6H14 and H2O None of the pairs above will form a homogeneous solution.
  4. science

    A ball is dropped from a height of 10 meter.If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back?
  5. Aths

    Convert the following measurements to the units specified
  6. plz help me

    1)When a 10-kg crate is pushed across a frictionless horizontal floor with a force of 14 N, directed 25° below the horizontal, the magnitude of the normal force of the floor on the crate is (g = 10 m/s2): 2)A constant force of 2.8 N is exerted for 9.0 s
  7. plz help me

    A 2.8-kg block slides down a frictionless plane that makes an angle of 57° with the horizontal. The acceleration of the block is (g = 10 m/s2):
  8. Physics

    A 20kg box is being pushed across the floor by a constant force (90,0,0)N. The coefficient of kinetic friction for the table and box is 0.25. At t=5s the box is at location ( 8,2,-1)m, traveling with velocity (3,0,0) m/s. What is the position and velocity
  9. chemistry

    If 0.130 g of p-aminophenol is allowed to react with excess acetic anhydridre , what is the theoretical yield of acetaminophen in moles ?In grams?
  10. chemistry

    2) why should you use a minimum amount of water to rinse the conical vial while transferring the purified acetaminpophen to the hirsch funnel?
  11. physics

    When a pencil cell is released from a certain point on a inclined board,it travels a distance of 35cm on floor A before it comes to rest.when the same pencil cell is released from the same point on the same inclined board,it travels a distance of 20 cm on
  12. psudoecode

    Design a sub-class of SimpleCalculator called Calculator using psudoecode that contains public methods named multiply(), and divide() and that defines private fields called num1 and num2. Each of the methods accepts two numeric arguments and returns a
  13. psudoecode

    Design a sub-class of SimpleCalculator called Calculator using psudoecode that contains public methods named multiply(), and divide() and that defines private fields called num1 and num2. Each of the methods accepts two numeric arguments and returns a
  14. Design

    Design a class named StockTransaction that holds a stock symbol (typically one to four characters), stock name, number of shares traded, and price per share. Include methods to set and get the values for each data field. Create the class diagram using
  15. visual logic

    The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design Visual Logic Flowchart for a program that accepts data
  16. pseudocode app

    Write the pseudocode for an application that allows a user to enter the price of an item and computes 8 percent sales tax on the item and prints out for the user the original price and the tax but not the total.
  17. physics

    A particle moves along a straight line such that its position is defined by s = (t3 – 3 t2 + 2 ) m. Determine the velocity of the particle when t = 4 s.
  18. physics

    A=ax+by B=cx+dy If a = 5 , b = 5, c = 4 and d = 1. Find the direction of -A (in degrees): relative to +x
  19. physics

    choose the correct answer and why? a car starts from rest and reaches speed of 80 km/h in 16 s the average acceleration of the car is: a\ 0.7 m/s*2 b\1.4 m/s*2 c\5 m/s*2
  20. PHYSICS

    A girl rows 10 km downstream in 2 h. Her return trip takes 3 h. How fast is the current. in km/
  21. PHYSICS

    car traveling at 28.8 m/s hits a stone wall . The driver, who is wearing a shoulder harness and seat belt, moves forward 0.93 m as the car stops. Assuming his acceleration is uniform, find his average velocity during the collision. in m/S
  22. PHYSICS

    A girl rows 10 km downstream in 2 h. Her return trip takes 4 h. How fast can she row in still water. in km/h?
  23. PHYSICS

    Sun..BLANK....than moon. earth iS..BLANK... mercury.
  24. PHYSICS

    A woman wantes to drive 83 km in 2 h. If she average 42 km/h for the first 1.27 h, what average velocity must she maintain for the remaining time in km/h
  25. physics

    An object of mass m = 5 kg is suspended by three cables as shown in the figure. If the tension T2 in the horizontal cable is 12 N: 1) What is the angle ƒáƒn that the left cable makes with the horizontal?
  26. physic

    A 16 g piece of glass floats in bromoform (density = 2.89 g/ cm3) but sinks in bromobenzene (density = 1.52 g/ cm3), in which it has an appparent mass of 3.84.. What is the density of the glass ( in g/ cm3):
  27. PHY

    Ok..I think I know the answer, but I have not been able to find it anywhere... An electrical field is best described as A)fact B)hypothesis C)theory I think its a theory, but I would appreciate any help! Thank you.
  28. litreature - king lear

    who said this quotation in king lear: thou shoulds't not have been old till thou hadest been wise.
  29. language grammar

    can someone explain to me what is inductive mood, subjunctive mood, andimparitive moodby giving examples. thanks
  30. calculus

    i need a real life application on parabola.
  31. litreature-vocab

    write sentence using each of the following 1) Affliction: means: effect 2) Pudder: means : turmoil 3) Scanted.means: negleacted. 4) Perpetual: means: ever lasting. 5) Entreat: means: plead, 6) sustain:
  32. litreature

    can you give me some multiple choice question about act 3 in king lear
  33. phsychology

    give example of external, unstable and specific explanation for disappointing event
  34. language

    please help me to write a poem about friendshi, thanks
  35. litreature

    please help me , this journal is for tomorow and i can't do it: the idea that power courrupts but suffering can redeem is fairly common plot support this theme, please answer as fast as you can . thank you
  36. litreature- king lear

    write a journal in king lear : the idea tha power corrupts but suffering can redeem is farily common plots support this theme
  37. english

    in kinglear act 2: who is curan and what position does he hold in society. 2) edgar decide to disguie himself as what? 3) Regan and Goneril tell lear he is what type of a man
  38. calculus

    find the vertex,focus, direction of the parabola. use a graphing utility to graphthe parabola: 1) x^2-2x+8y+9=0 2) y^2-4y-4y=0 3) x=1/4(y^2+2y+33) 4)(x+1/2)^2=4(y-1) 5) y= 1/4(x^2-2x+5)
  39. math

    what does Q1 and Q3 and interquartile range means
  40. biology

    where in a chloroplast would you find the highest concentration of protons?
  41. Managerial Finance

    If the company opts ( choose) not to expand, what is the implication for the company's future borrowing needs? What are the implications if company does expand ?
  42. Managerial Finance

    If the company opts ( choose) not to expand, what is the implication for the company's future borrowing needs? What are the implications if company does expand?