Most popular questions and responses by von
  1. dynamics of rigid bodies

    1. An elevator weighing 15 kN starts from rest and acquires an upward velocity of 3 m/sec. in a distance of 6 m. If the acceleration is constant, what is the tension in the cable? 2. A man weighing 70 kg is in an elevator moving upward with an acceleration

    asked on July 7, 2015
  2. Math

    Ali reads a story and a play. The play has 165 pages, which is 5 times as many pages as the story. Which equation could you use to find s, the number of pages in the story?

    asked on February 14, 2018
  3. Math

    . Identify each expression as a numerical expression or a variable expression. For a variable expression, name the variable. d + 43 - 9

    asked on October 5, 2012
  4. Math

    The ratio of girls to boys is 3 to 5. If there are 20 more girls than boys, how many total students are there? How do I start this? Thanks

    asked on October 11, 2016
  5. Math

    A number, containing no zeros, changed to 310,000 after it was rounded. To what place was the number rounded? Explain how you know. This is the question my 4th grader has on a homework assignment. I'm lost on the question and she states she doesn't know

    asked on September 15, 2015
  6. Math

    A computer company gives a discount of 10% off of the marked price on a new piece of software. If it makes a profit of 11% on this sale, what percent does the marked price exceed the cost price?

    asked on November 8, 2010
  7. Math

    The ratio of boys to girls is 3 to 7. If there are 20 more girls than boys, how many boys are there?

    asked on October 11, 2016
  8. 4th grade math

    364 plus 519 round each number the greatest place value to estimate the sum of:

    asked on October 19, 2011
  9. comp

    compare a smart UPS to one that does not interface with a PC but otherwise has similar ratings

    asked on September 26, 2010
  10. work

    1. You are a member of Special Troop Battalion, 3d BCT, 10th Mountain Division. Your battalion will deploy to Iraq within six months. The battalion commander approved your unit’s METL. The METL identifies critical tasks for each platoon and now it is

    asked on November 16, 2012
  11. computer

    describe two ways to troubleshoot a PC connection that has lost contact with the network

    asked on June 16, 2011
  12. chemistry help

    enzymes and substrates overall reaction: S -> P step 1: E + S -> ES fast step 2: ES -> E + S fast step 3: ES -> E + P slow what is the order of the reaction in E and what is the order of reaction in S?

    asked on October 11, 2010
  13. geometry 2

    If a rectangle has an area of 132 square units and a length of 11 units, what is its width? If necessary, round your answer to two decimal places.

    asked on March 2, 2010
  14. english

    was he a good leader to everyone when he was young?

    asked on November 4, 2008
  1. History

    what do you need?

    posted on May 1, 2019
  2. Math

    But the ratio is girls to boys 3:5

    posted on October 11, 2016
  3. 4th grade math


    posted on October 19, 2011
  4. Chemistry (URGENT)


    posted on March 2, 2010