Johnson

Popular questions and responses by Johnson
  1. Phyics

    A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower and hung down the center of the staircase. However, nothing is available with which to measure the length of

    asked on November 11, 2013
  2. physics

    A spring scale is calibrated from zero to 20. N. The calibrations extend over a length of 0.10 m. (a) What is the elastic potential energy of the spring in the scale when a weight of 5.0 N hangs from it? (b) What is the elastic potential energy when the

    asked on December 1, 2014
  3. chemistry

    If a student attempts to identify an unknown compound by methodused in this experiment. She finds that when she heated a sampleweighing 0.4862 g the mass went down appreciably, to 0.3067 g. Whenthe product was converted to chloride, the mass went up, to

    asked on February 27, 2013
  4. algebra

    ben bought a car for $20,000 in 2003. The car depreciates at a constant rate of 21% per year . Find the price of the car in the year 2010 . Round to nearest dollar

    asked on March 12, 2012
  5. physics

    a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each

    asked on September 29, 2013
  6. physics

    a body is under of 2 forces 7n and 10n find the resultant of 2 forces if (a)the forces are parallel and act in thesame direction (b)the forces are parallel and act in opposite direction(c)the two forces are inclined and act at an angle of 60 degree to each

    asked on September 29, 2013
  7. physics

    a bullet is fire in a horizontal direction with a muzzle velocity of 300m/s in the absence of air resistance, how far will it have dropped in travely a horizontal distance of(a)20m?(b)40m?(c)60m? how far will it drop in one second

    asked on May 3, 2016
  8. Chemistry

    Explain, in terms of particles, concentration, and reaction rate, what you expect to happen when methane gas (CH4) and hydrogen sulfide gas (H2S) are sealed in a flask and reach a state of equilibrium. CH4 (g) +2 H2S (g) CS2 (g) + 4 H2 (g)

    asked on April 15, 2012
  9. Physics

    Use scale drawing method: If a man travels 7km 30degree east of north,then 1okm east,find the resultant displacement

    asked on September 23, 2018
  10. Physics

    A jogger's internal energy changes because he performs 6.80 105 J of work and gives off 4.9 105 J of heat. However, to cause the same change in his internal energy while walking, he must do 8.10 105 J of work. Determine the magnitude of the heat given off

    asked on April 18, 2008
  11. Phyics

    A 1390-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, find (a) the magnitude of the tension in the wire and the

    asked on November 10, 2013
  12. Math

    A particle moves along a straight line with a velocity, v ms/s, given by v = 4 - 8 sin 2t where t is the time in seconds after passing a fixed point O. 1. Determine the range of values of v.

    asked on April 15, 2016
  13. Physics

    A 0.21 kg ball on a string is whirled on a vertical circle at a constant speed. When the ball is at the three o'clock position, the tension is 18 N. -------------------------------------------------------------------------------- (a) How does the magnitude

    asked on April 11, 2008
  14. Physics

    The pressure and volume of a gas are changed along a path ABCA in the figure. The vertical divisions on the graph represent 3.50 105 Pa, and the horizontal divisions represent 2.00 10-3 m3. Determine the work done (including algebraic sign) in each segment

    asked on April 20, 2008
  15. Math

    Ken planted a mongo seed. He noticed that the seed grew 1/5 times larger than the previous week. This week he measured the plant and found out that it is 10cm tall. How tall will the plant be in two weeks from now?

    asked on June 20, 2017
  16. Further Mathematics

    The first term of a g.p is 7 while the common ratio is 3.find the 11th term.

    asked on February 8, 2017
  17. Physics

    A ruler is accurate when the temperature is 25°C. When the temperature drops to -16°C, the ruler shrinks and no longer measures distances accurately. However, the ruler can be made to read correctly if a force of magnitude 1.2 103 N is applied to each

    asked on April 11, 2008
  18. algebra

    10 and Carlos's age Use the variable c to represent Carlos's age.

    asked on February 16, 2019
  19. Physics

    An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air?

    asked on April 20, 2008
  20. math

    John's account of 98.50 has been delinquent for 3 months. After 90 days office charges a 2% service charge, compounded monthly that is added to future bills. What would be the amount owed after 9 months? My math is 98.50 x 0.02 = 1.97 1.97 x 12 months =

    asked on May 9, 2010
  21. Math

    we need to fence off a rectangular section of land in order to make some huge play pens. All four sides will be fenced and there will also be 2 parallel fence lines inside the perimeter in order to make 3 identical fields. If we have 2600 meters of

    asked on February 24, 2011
  22. biology

    1. Explain the problems that growth causes for cell 2. Describe how cell division solves the problem of cell growth

    asked on December 1, 2008
  23. adv algebra

    The probability of any outcome cannot be larger than which number? A) 0 B) 0.5 C) 1 D) 10

    asked on September 14, 2015
  24. Probability

    Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

    asked on February 4, 2012
  25. math

    An advertisement states that 8 thermometers cost 12.42 minus a 3% disc. Dr. wants to order a dozen to take advantage of the savings sales tax is 5%. What would the cost be? I divided 8 into 12.42 wich gives you 1.55 per thermometer 1.55 x 12 thermometers =

    asked on May 9, 2010
  26. math

    put these in order from least to greatest. 0.145,0.15,0.155,0.1 1/12,0.12,1/20,0.20,1/6,0.6,0.06,0.16 Can someone please help me somehow a tip would be more useful than the answer though

    asked on November 17, 2010
  27. Analytical Chemistry

    advantages and diaadvantages of potentiometris titration

    asked on June 10, 2010
  28. Physics

    An ideal gas at 6.0°C and a pressure of 1.92 105 Pa occupies a volume of 2.10 m3. (a) How many moles of gas are present? moles (b) If the volume is raised to 4.60 m3 and temperature raised to 30.5°C, what will be the pressure of the gas? Pa I used the

    asked on April 20, 2008
  29. Algebra 2 (probability)

    Sara has 5 flower pots with a unique flower. The pots are arranged along a line. One day she decided to change their order the condition that no pots that were originally next to each other remain next to each other. Find out the number of possible orders

    asked on July 26, 2015
  30. Microeconomics: Budjet Constraint

    You have decided to eat sushi for lunch and have a grand total of $20 to spend. Whatever money you have left over from buying sushi rolls will be spent on cans of soda to get you through the rest of the day. Your problem is to choose the best combination

    asked on August 6, 2009
  31. Verbal reasoning

    which words among the three (Rapid;jump and fly) are best opposite in to these three words: Slow;crawl and fly ?

    asked on February 6, 2016
  32. math

    Several studies have been conduct on the effectiveness and safety of the H1N1 influenza vaccine. One study found that in a group that received the actual medication, the drug was 87% effective. In a group that received a placebo, there was 10% effective

    asked on July 14, 2015
  33. math

    please solve using the multplication principle -x/9=1/6

    asked on November 19, 2011
  34. math

    Please explain this exercise and give answer y = 13+x, for x

    asked on November 19, 2011
  35. math

    44 more thatn Q algebraic expression

    asked on November 17, 2011
  36. Math

    Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

    asked on February 4, 2012
  37. math

    Please divide if possible -110/11

    asked on November 20, 2011
  38. Math

    how do I find a equivalant expression without parentheses -y(y-25)=

    asked on November 19, 2011
  39. math

    Using taylor series solve lim x→0 ((sin^-1 6x)-(sin 6x))/((tan^-1)(6x)-(tan 6x) I don't know how to start this problem

    asked on November 23, 2015
  40. PIMA

    Calculate Cholestyramine 20% ointment to make 100 gm. Base: Petroleum

    asked on September 28, 2015
  41. crt 205

    final project topic: American Patriotism is Alive and Well

    asked on November 24, 2012
  42. statistics

    Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

    asked on February 4, 2012
  43. Phi103

    What is the truth value of the sentence "P v ~ P"? (Points : 1) True False Cannot be determined Not a sentence 2. One of the disadvantages of using truth tables is (Points : 1) it is difficult to keep the lines straight T's are easy to confuse with F's.

    asked on December 12, 2011
  44. math

    please help me solve by multiplication principle; -x/9=1/16

    asked on November 19, 2011
  45. math

    translate the phase to an alegebraic expression; John has $30.00 before spending N dollars on food how much money remains?

    asked on November 19, 2011
  46. Math

    please help me to solve this problem -2 x(-7)x (-9)

    asked on November 19, 2011
  47. smitty

    is 8m cubed - 25 prime?

    asked on January 31, 2013
  48. math

    when solving using multiplication principle -13x=273 how do i solve plus perform check

    asked on November 19, 2011
  49. math

    So is -(y-25) is an equivalant expression without parentheses =25y

    asked on November 19, 2011
  50. math

    supplies on invoice are 4 bottles alcohol @ 2.25 each = 9.00 3 thermometers @ 1.95 each = 5.85 6 boxes cotton @ .29 each = 1.74 6 bottles mouthwash @ .89 = 5.34 11 crtns cotton swabs @ .39 each = 4.29 3 hypo needles @ .39 each = 1.17 Dr. receives 3% disc,

    asked on May 9, 2010
  51. math

    state the corrdinates of the centre of the circle described by the equation. x^2+y^2=R^2 please help!

    asked on March 16, 2014
  52. Math

    Two group of male students cost their past on a particular proposal.the result are as follows: Group infavour against A 128 32 B 96 48 if a student in favour of proposal is selected for a post. What is the probability that he is from group A ? if a student

    asked on February 4, 2012
  53. math

    please simplify 16/9

    asked on November 20, 2011
  54. Math

    4/3 x (4/3) If you multiply what would it be please show steps and answer

    asked on November 20, 2011
  55. math

    please simplify [5-5(2-4)]

    asked on November 19, 2011
  56. math

    can you help me to find an equivalant expression without parentheses -(y-25)

    asked on November 19, 2011
  57. Math

    I do not understand please explain for me solve for the indicate letter x=13+x, for x the solution is x =

    asked on November 19, 2011
  58. math

    -94+(-19)

    asked on November 17, 2011
  59. Physics

    An engine has an efficiency of 61% and produces 7900 J of work. Determine each of the following. (a) the input heat J (b) the rejected heat J

    asked on April 18, 2008
  60. science

    calculate the osmotic pressure at 18.5 degree celcuis of a suspension containing 30g/L of solid particles. each particle weighs 10^-9g.

    asked on August 5, 2015
  61. math

    determine the equation of a circle that has its center a (0,0) and passes through each point. a)(6,-3)

    asked on March 16, 2014
  62. math

    please help me solve and explain the answer 96+(-100)+773+(-297)+10+(-251)

    asked on November 19, 2011
  63. mathematics

    -(x-4)(x-1)+5(3x-1)(2x+1) expand and simplify

    asked on March 23, 2014
  1. Math Help please Check my answer

    THIS IS WRONG

    posted on January 15, 2020
  2. math

    I want to see the answer

    posted on July 4, 2019
  3. Life orientation

    Nna ke nyaka mosadi eng dikarabo

    posted on April 22, 2019
  4. Life orientation

    Mogweta lena ahh la borah .....kgane u want us to fail

    posted on April 21, 2019
  5. algebra

    Seven more than the product of 10 and Carlos's age Use the variable c to represent Carlos's age

    posted on February 16, 2019
  6. language arts

    100% Correct A C D

    posted on January 16, 2018
  7. language arts

    OMG He's correct thank you so much A C D

    posted on January 16, 2018
  8. Chemistry

    Determine how many grams of CO2 are produced by burning 1.01 g of C4H10.

    posted on October 14, 2017
  9. Agriculture

    why is agriculture referred to as the nerve centre of the nation

    posted on August 8, 2017
  10. Math

    Okay.Thank you!

    posted on June 20, 2017
  11. Math

    Hi Ms. Sue. Thanks for your reply/answer. About this question from the above problem: "How tall will the plant be in two weeks from now?" How can this be solved? Thanks!

    posted on June 20, 2017
  12. math

    I don't get this problem...

    posted on October 11, 2016
  13. Math

    40.80

    posted on February 15, 2014
  14. Algebra

    96

    posted on February 8, 2014
  15. math

    228.29056

    posted on February 13, 2013
  16. crt 205

    American Patriotism is Alive and Well

    posted on November 24, 2012
  17. math

    would you show me how you solved -110/11

    posted on November 20, 2011
  18. math

    10

    posted on November 20, 2011
  19. math

    How did you come up with (1.02)

    posted on May 9, 2010
  20. Microeconomics: Budjet Constraint

    To be more clear, (20,0) to (7,0)

    posted on August 7, 2009
  21. Microeconomics: Budjet Constraint

    Sorry I should have said that fractional sushi rolls and cans of soda are possible. What I was thinking was, with soda on the vertical axis and sushi on the horizontal axis, we have a horizontal line at $7 on the vertical axis. So basically a straight line

    posted on August 7, 2009
  22. biology

    Whats "SA to V ratio"?

    posted on December 1, 2008
  23. Physics

    that's what I have been working and keep coming up with either two answers 9.29 or 9.29 * 10 ^10 and the computer is telling me its wrong I don't know what else to do. Maybe I'm computing the number wrong.

    posted on April 11, 2008