Most popular questions and responses by KEV
  1. physics

    An 76 kg construction worker sits down 2.0 m from the end of a 1440 kg steel beam to eat his lunch. The cable supporting the beam is rated at 15,000 N. Should the worker be worried? Determine the tension in the cable. i.imgur. com/Qfhkd. gif I can't figure

    asked on October 21, 2012
  2. physics

    The figure below shows the circular wave fronts emitted by two sources. Make a table with rows labeled P, Q, and R and columns labeled r1, r2, Δr, and C/D. Fill in the table for points P, Q and R, giving distances as multiples of λ and indicating, with a

    asked on December 9, 2012
  3. English

    whats figurative language? Check this site for a great explanation and examples. Thank you for using the Jiskha Homework Help Forum. If you are seeking a definition for "figurative language" it is used

    asked on April 13, 2007
  4. Physics

    An object in space is initially stationary relative to the Earth. Then, a force begins acting on the object, starting with a force of 0 N, and increasing at a uniform rate until the magnitude of the force is 56 N after the force has acted for 10 s. The

    asked on January 30, 2015
  5. Physics

    A 64.3 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a 10.0 kg oxygen tank in a direction away from the shuttle with a speed of 11.9 m/s, propelling the astronaut back to the shuttle. Assuming

    asked on January 26, 2015
  6. Chemistry

    the pH of 10.00 mL of 0.100 M HCl after adding 10.00 mL of indicator solution

    asked on June 12, 2011
  7. physics

    Which consumes more energy, a 1.5 kW hair dryer used for 10 min or a 10 W night light left on for 19 hr?

    asked on November 25, 2012
  8. math

    The volume of a rectangular prism is 2x^3+5x^2+x-2. The height of the prism is 2x-1, and the length of the prism is x+2. Find the width of the prism.

    asked on March 10, 2010
  9. physics

    A 4.55 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 3.20 kg. How far and in what direction does the object move in 0.200 s, assuming that it moves freely and that the drag

    asked on December 1, 2012
  10. physics

    The forces in the figure below are acting on a 2.1 kg object. Find the values of ax and ay, the x and y components of the acceleration. i.imgur. com/nNz9m. png this is one of the last problems on my homework that i just do not understand.. can someone

    asked on September 28, 2012
  11. Physics

    Calculate the force required to pull a copper ball of radius 2.00 cm upward through a fluid at the constant speed 6.00 cm/s. Take the drag force to be proportional to the speed, with proportionality constant 0.950 kg/s. Ignore the buoyant force. N

    asked on March 1, 2016
  12. physics

    A 2000 kg car is rolling at 2.0 m/s. You would like to stop the car by firing a 12 kg blob of sticky clay at it. How fast should you fire the clay? i keep getting 25.8 but apparently that isn't right so i'm at a loss

    asked on November 4, 2012
  13. physics

    When a 2.9 kg object is suspended in water, it "masses" 1.5 kg. What is the density of the object?

    asked on December 1, 2012
  14. Chemistry

    How many grams of formic acid, HCOOH, must be added to 0.270L of 0.180M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.20? Assume no volume change. Ka of HCOOH= 5.010^-4

    asked on April 30, 2012
  15. organic chem

    looking at this h nmr spectra of 4 isomeric alcohols with the formula c5h12o, make a suitable structure for each spectrum and assign h nmr signals for each H in the molecule i.imgur. com/MTHt3. png

    asked on September 15, 2012
  16. Chemistry

    What volume of water would be required to dissolve 1 g of BaF2? mass of BaF2 is 1.31 g and it dissolves in 1 L of water. The answer is 0.763. Can someone please explain how they got this?

    asked on June 11, 2011
  17. Math

    A shirt is on sale for 25% (1/4) off. Its original price was $12. How much is the shirt now?

    asked on November 17, 2010
  18. limit calc question

    2 questions!!! 1. Limit X approaching A (X^1/3-a^1/3)/ x-a 2. LiMIT x approaching 0 (1/3+x – 1/3) /x On the first, would it help to write the denominator (x-a) as the difference of two cubes ((x^1/3 cubed - a^1/3 cubed) second. use LHopitals rule. Take

    asked on March 2, 2007
  19. math

    how would I find each sum or difference of (5a-2b) + (-4a+5b) what do I do with -2b when you line up the +5b?

    asked on July 28, 2008
  20. Math

    Q: A metal cube weighs 5/9kg and its volume is 40 5/6cm3. How much does it weigh per 1cm3? 5/9kg to .555kg 40 5/6cm3 to 40.833cm3 .555kg / 40.833cm3 = .0135 A: 1cm3 weighs .0135kg Is this correct? Thank you.

    asked on August 2, 2016
  21. Math

    barry puts TVs on a 15-foot shelf in his electronics store. He allows 2 1/2 feet of space for each TV. He will be able to put 5.5 TVs on the shelf. Is this reasonable or not

    asked on November 2, 2011
  22. Math

    Q: Joe's car can go 9 1/7km with 1 liter of gas. How far can it go with 1 1/8 liters of gas? 9 1/7 to 9.143 1 1/8 to 1.125 1 liter / 9.143 = 0.109 liters per km 1.125 liters / 0.109 liters per km = 10.32km A: Joe's car can go 10.32km on 1 1/8 liters of

    asked on August 2, 2016
  23. physics

    A(n) 0.42 kg softball is pitched at a speed of 12 m/s. The batter hits it back directly at the pitcher at a speed of 27 m/s. The bat acts on the ball for 0.016 s. What is the magnitude of the impulse imparted by the bat to the ball? Answer in units of N ·

    asked on February 1, 2015
  24. science

    gravitational force decreases with distance. what does this mean for a space traveler who leaves earth in a spaceship?

    asked on May 7, 2014
  25. Physics

    An elevator is moving upward 1.17 m/s when it experiences an acceleration of 0.33 m/s2 downward, over a distance of 0.75 m. What will its final speed be? Answer in units of m/s

    asked on October 1, 2013
  26. MATH

    a parabola passes via the points (1.5,1) and (3,-5). given that the vertex lies on the line 7x+3y-4=0,find the focus and the equation of the parabola

    asked on May 18, 2012
  27. College Chemistry

    A stock solution is prepared by adding 20mL of 0.2M Na3PO4 to enough water to make 80mL. What is the Na+ concentration of 20mL of the stock solution? I am thinking .012: a) .02 times .2 = .004 b).004 times 3 = .012 (for each Na in the molecule) Seems too

    asked on March 29, 2012
  28. Europe

    is the european union federation, a confederation or something else?

    asked on April 8, 2010
  29. Math

    Q: If 5/6 Liter weighs 9/10 kilograms, how much will 1 Liter of paint weigh? 0.9kg / 5 = 0.18 0.18 * 6 = 1.08 1 Liter of paint will weigh 1.08 kilograms. Is this correct? Thank you.

    asked on August 2, 2016
  30. chemistry

    Biosynthesis of proteins from amino acids is an energy driven condensation process (ÄH = + 10 kJ/mol) requiring energy input in the form of ATP. In an experiment, 0.4 mol of amino acids reacted to give a polypeptide and some ATP was consumed. a) explain

    asked on April 13, 2014

    How do we determine whether a substance is pure in a chemical formula ?

    asked on February 6, 2013
  1. Science

    the awnsers are btw 1B 2B 3A 4TRUE

    posted on September 20, 2018
  2. Science

    no ur copying is name cause he responded first just like now im copying both ur names

    posted on September 20, 2018
  3. ELA 6th grade

    The answers are bcbba

    posted on April 4, 2018
  4. Science

    The other *Kev* is copying my name but eany was the answer is A

    posted on April 4, 2018
  5. social studies

    contact me on ps3 my gamer tag is frakenbuger

    posted on April 3, 2018
  6. social studies

    eany questions contact me

    posted on April 3, 2018
  7. social studies

    the answer are A A C D

    posted on April 3, 2018
  8. Science

    GLTTTT Is It A ?

    posted on March 22, 2017
  9. statistics

    Far above average

    posted on February 25, 2017
  10. Math

    Thank you, Reiny. I see your point about decimals vs. fractions.

    posted on August 2, 2016
  11. Math

    I appreciate the help, Reiny. I will review about usable fractions.

    posted on August 2, 2016
  12. Math

    Thank you, Reiny. I'm wondering with the way you did the problem, where did you get the number 245 from?

    posted on August 2, 2016
  13. Math

    Thank you, Ms. Sue.

    posted on August 2, 2016
  14. math

    52.2 m

    posted on May 17, 2016
  15. physic

    37500 N 166666.6667 LBS

    posted on April 24, 2013
  16. College Algebra


    posted on February 6, 2013
  17. chemistry

    use PV=PV Answer 2.73

    posted on October 11, 2012
  18. Calculus

    Hi, Kavya! :D LOL

    posted on December 9, 2010
  19. 4th grade


    posted on November 17, 2010
  20. college

    for com/220

    posted on August 9, 2009