Sahar

Most popular questions and responses by Sahar
  1. Physics

    At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before

    asked on November 3, 2013
  2. Geometry

    Find the precision for each measurement. 120 meters, 7 1/4 inches, 30.0 millimeters

    asked on August 29, 2016
  3. kctcs

    the ball thrown the brick wall bounces directly back with the same speed it had when it struck the wall . has the velocity of the ball change explain ?

    asked on February 5, 2013
  4. maths

    Hexagonal tiles of sides20cm are used to tile a room which measures 6.25m. Assuming we complete the edges by cutting up tiles, how many tiles are needed?

    asked on February 5, 2012
  5. chemistry

    draw a diagram showing the arrangement of the valency electrons in one molecule of the covalent compound selenium chloride. use x to represent an electron from an atom of selenium. use o to represent an electron from an atom of chlorine

    asked on November 22, 2011
  6. Physics

    At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before

    asked on November 3, 2013
  7. Calculus

    Consider the function below. f(x) = [1-(4/x)]^x (a) Use a graph to estimate the value of the limit of f(x) as x approaches infinity. (Round the answer to two decimal places.) (b) Use a table of values of f(x) to estimate the limit. (Round the answer to

    asked on September 30, 2009
  8. math

    Jenna has $1500 in a savings account. She adds $30 to her account each month. Luis has $2400 in his savings account. He withdraws $30 from his account each month. Write and solve a system of equation.

    asked on November 8, 2012
  9. Math

    The Cost of grassing a square lawn at 1.35 per m suare is 72037.35.Find the cost of fencing with two times at rs 2.85 per m.

    asked on August 25, 2017
  10. Physics

    At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before

    asked on November 3, 2013
  11. Physics

    At the beginning of a basketball game, a referee tosses the ball straight up with a speed of 4.6 m/s. A player cannot touch the ball until after it reaches its maximum height and beings to fall down. What is the minimum time that a player must wait before

    asked on November 3, 2013
  12. Chemistry - General

    1. Consider a calorimeter into which 135g of water at 45.3 degrees Celsius is added. The initial temperature of the calorimeter was 23.8C and the equilibrium temperature of the water and the calorimeter is 39.6C. Assuming there is no heat loss to the

    asked on July 24, 2009
  13. English

    1. How does the fact that Anne tries to maintain a positive attitude affect the way readers view her? Please include textual evidence in your answer as well as what page number you found it on.

    asked on March 4, 2015
  14. Physics

    A certain insect’s wing has been shown to deflect a distance 14.8 mm under a force of 0.19 N applied to the end of the wing. (a) If the wing is assumed to behave as an ideal spring, calculate the force constant in N/m. (b) At this deflection, how much

    asked on April 21, 2016
  15. Chemistry - General, Hess's Law

    In an experiment, 11.6g of a salt was dissolved in 100.0ml of water contained in the above calorimeter, all at an initial tmperature of 24.5 degrees Celsius. After dissolution was complete, the temperatur was 31.8C. The specific heat of the solution is

    asked on July 24, 2009
  16. Physics

    A crane lifts a package of mass 121 kg. If the power output of the crane is 101 Watts, at what speed can the package be lifted, in m/s?

    asked on April 21, 2016
  17. Math

    The Cost of grassing a square lawn at 1.35 per m suare is 72037.35.Find the cost of fencing with two times at rs 2.85 per m.

    asked on August 24, 2017
  18. chemistry

    Name a reagent that will react with a) copper(II)hydrooxide and aluminium hydroxide b)aluminium hydroxide but not copper(II)hydroxide 2)suggest how you could separate a mixture of silicon(IV) oxide and magnesium oxide 3)Name a reagent that could react with

    asked on September 17, 2011
  19. Physics

    A jet of mass 4,768 kg lands on an airstrip, stopping after a distance of 414 m. If the jet has an initial landing speed of 36 m/s, what is the work done, in Joules, by non-conservative forces to stop the jet?

    asked on April 21, 2016
  20. science

    when two equal forces of f1 and f2 making an angle of 180 degree with each other the magnitude of their resultant is ................?

    asked on November 9, 2016
  21. physics

    A race car moving at 157km/hr decelerates at -7.00 m/s^2 to a speed of 75.0km/hr A) how long did this take? B) how many meters did the car travel during this deceleration? I attempted this problem many times and i don't seem to get the correct answer

    asked on January 6, 2015
  22. math

    you have an unlimited supply of 5% saline solution and 8% saline solution. How much of each type would you have to use to create 60 ounces of 7% saline solution? Write and solve a system of equations to model and solve this problem.

    asked on November 8, 2012
  23. math

    2x^2-5x-12=0 solve by completing the square. please explain how it's sovled.

    asked on September 10, 2013
  24. Physics

    Two masses, mass A (1.9 kg) and B (3.3 kg) are hung on either side of a pulley. The masses each have an initial speed of 0.8 m/s, with mass B moving up. How high, in m, does mass B move after being released at this initial speed?

    asked on April 21, 2016
  25. physics

    which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram

    asked on November 25, 2011
  26. math

    teemu's t-shirts designs and manufactures t-shirts for a $15 flat design rate and $7.50 for each t-shirt.he wants to sell his t-shirts to the senior class for their graduation party. he is going to charge them $10 for each t-shirt. write a function,c,

    asked on October 1, 2012
  27. math

    order these from least to greatest,5/9,2/7,1/8

    asked on November 7, 2016
  28. math

    2x^2-5x-12=0 solve by completing the square. please explain how it's sovled.

    asked on September 10, 2013
  29. physics

    which statement is true about weight 1) pull of earth on a body 2) mass of a body 3) scalar quantity 4) unit per kilogram

    asked on November 25, 2011
  30. geometry

    find the area of the garden drawn below.

    asked on April 10, 2011
  31. PHYSICS NEED HELP ASAP

    A race car moving at 157km/hr decelerates at -7.00 m/s^2 to a speed of 75.0km/hr A) how long did this take? B) how many meters did the car travel during this deceleration? I attempted this problem many times and i don't seem to get the correct answer

    asked on January 6, 2015
  32. education

    sand, rocking chairs, animals, and strap swings are examoles of a__ environment. a) static b) soft c) creative d) hard. would the answer be d) hard

    asked on March 19, 2013
  33. math

    teemu's t-shirts designs and manufactures t-shirts for a $15 flat design rate and $7.50 for each t-shirt.he wants to sell his t-shirts to the senior class for their graduation party. he is going to charge them $10 for each t-shirt. a) write a function,c,

    asked on October 1, 2012
  1. high school algrebra 1

    What’s the dependent and independent for this situation? And create a table and graph please help me I really need the answer for this problem.:(

    posted on September 18, 2019
  2. Algebra I

    h=16t^2+100t+40

    posted on June 14, 2018
  3. math

    tell me

    posted on September 12, 2017
  4. Math

    4767.84

    posted on August 25, 2017
  5. stats

    1. Use the table below to help you construct a probability distribution for all of the possible values of X and their probabilities 2. Find the expected value of X, and interpret it in the context of the game. 3. If you play in such a raffle 100 times,

    posted on October 31, 2015
  6. math

    5x-6y+30=o

    posted on July 25, 2012
  7. maths

    Its rectangular room of 6.25m by 4.85m

    posted on February 5, 2012
  8. Math

    812 divide by 9 is 90 because you estimate

    posted on October 7, 2010
  9. chemistry.

    all of above is wrong. i have the same question for school.

    posted on February 16, 2010