Posts by cylinder

Total # Posts: 95

  1. Physics as repost please answer and help

    You said: "tap water" but more likely, what are the units for the accepted and the measured? I said: I dont know it doesnt say but those are the 2 values for a single silver atom if that helps you figure out the units. you said: No, I know the units, the point is you...
  2. Physics as repost please answer and help

    Silver plating: A student attempts the process of silver plating to determine the mass of a silver atom. a series of objects are measured, then electroplated for a measure period of time, while maintaining a steady current through a solution of silver nitrate in tap water. ...
  3. physics as

    no its 10-7 as in it equals to 3 AND you minus it, its not a power. Please post hrelp with this in mind
  4. physics as

    the figure below shows the graph of force,F (y axis)acting on a trolley of 0.4kg against time,t (x axis) 20--------- ........._-- ........._...-- ........._....--- ........._......--- ........._.......----- 0........5............9 The velocity of the trolley is constant ...
  5. As physics

    Thank you so much both of you really helpful!! :)
  6. As physics

    Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons per metre length of ...
  7. As physics

    i figured out that f x change in t =change in p is the equations used and nowi understand that bit so it became: change in momentum= 20 x 5=100 change in momentum= 1/2(20x4)=40 i just dont get the 10-3 bit
  8. As physics

    The "10-3" bit especially confuses me as i dont know where those number came from and wat it is for/ wat equation
  9. As physics

    the figure below shows the graph of force,F (y axis)acting on a trolley of 0.4kg against time,t (x axis) 20--------- ........._-- ........._...-- ........._....--- ........._......--- ........._.......----- 0........5............9 The velocity of the trolley is constant ...
  10. Physics

    and one of the options is right so do that working out to find out which one
  11. Physics

    54(9.8*sin15+1.2) will show you the option it is
  12. Physics

    Choose from the options below:( to get you thinking) A 202 N B 222 N C 242 N D 262 N
  13. As physics

    So is all this what i should right? i dunt know which bit is relevant as so much stuff comes up and i dont know what to link and what is required of me to write, now that i have given it a go could you please help
  14. As physics

    I dont know what to link or write to answer the question, i did your research task but am still confused
  15. As physics

    Lead pipes. For many centuries, water pipes were made of lead, because of its ease of processing and durability. ... Most of the lead pipes that exist today are being removed and replaced with the more common material, copper or some type of plastic.
  16. As physics

    nothing comes up useful when i write:why is the mass of a silver atom higher than expected and im not sure what to write please help me more
  17. As physics

    1) Tap water is water supplied to a tap. Its uses include drinking, washing, cooking, and the flushing of toilets. 2) Today, most plumbing supply pipe is made out of steel, copper, and plastic; most waste (also known as "soil") out of steel, copper, plastic, and cast...
  18. As physics

    I dont know it doesnt say but those are the 2 values for a single silver atom if that helps you figure out the units.
  19. As physics

    Silver plating: A student attempts the process of silver plating to determine the mass of a silver atom. a series of objects are measured, then electroplated for a measure period of time, while maintaining a steady current through a solution of silver nitrate in tap water. ...
  20. math

    Given, Diameter = 21m, cost of the rope = Rs 4 per meter, length of the rope required to fence the garden two round=?, Cost of the rope = ? The length of rope required = 2 × circumference. Circumference = 2 ? r = ? D = (22/7) × 21 = 66 m Therefore, length of rope ...
  21. As Physics

    in which wire will the electrons move faster and why?
  22. As Physics

    Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Two copper wires of diameter 1 mm and 2 mm are joined end to...
  23. As Physics

    please help
  24. As Physics

    i cant find the numbers for the equation yo gave me "NUMBER electrons per lenth=electron dinsity)*area"
  25. As Physics

    is there a way to work this out?
  26. As Physics

    Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons per metre length of ...
  27. chemistry

    Iodide and diamond crystals both contain covalent bonds and yet the physical properties of their crystals are very different. Their melting points are 387K and 3827K respectively. State this type of structure present in each case and explain why the melting point of diamond is...
  28. chemistry

    Carbon tetrachloride, CCl4 is used as a solvent and a coolant. Its boiling point I s-22.9 degrees. By considering the intermolecular forces involved discuss whether you expect the boiling point of CHCL3 to be greater or lower than tis value. [6] Please help
  29. Science

    dGorxn = (n*dGo products) - (n*dGo reactants
  30. physics As

    Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge A piece of fuse wire has a diameter of 0.22mm and carries a ...
  31. physics As

    The current carriers in a piece of semiconducting material have a charge of 1.6 x 10^-19C. Calculate the number of charge carriers entering the material per second when the current is 3 microamps so 3 x 10^-6 amps. ? Please help and do it step by step all parts of questions ...
  32. trigonometry

    ? = s/r = (6 m)/(5/2 m) = 12/5 radians = 2.4 radians r = s/? = (60 ft)/(3?/2) = 40/? ft ? 12.732 ft
  33. As physics

    Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Two copper wires of diameter 1 mm and 2 mm are joined end to...
  34. As physics

    Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons per metre length of ...
  35. As physics

    Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge A piece of fuse wire has a diameter of 0.22mm and carries a ...
  36. As physics

    help please!
  37. As physics

    The current carriers in a piece of semiconducting material have a charge of 1.6 x 10^-19C. Calculate the number of charge carriers entering the material per second when the current is 3 microamps so 3 x 10^-6 amps. ? Please help and do it step by step all parts of questions ...
  38. Science

    How old the object containing the element is.
  39. As physics

    change in mass___total charge_____no of elect for each of______delivered by_______rons pass objects_________circuit(eachtest)_(thrcathod) _____________________________________________0.14____________144__________9 x 10^20___ 0.57_____________132__________8.25 x 10^20_ 0....
  40. Damon/BobPursley/Physicstutor/whichoneisright

    This is the clearest explanation given for this thread thank you. But may I ask what equation you used at the beginning as I can’t seem to find it when I searched it online but at first I thought it was d=vt but b=velocity isn’t squared in this equation. Also, what ...
  41. Damon/BobPursley/Physicstutor/whichoneisright

    Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The reaction time of a driver ...
  42. physics

    Please just tell me if I AM right or wrong because the website wont do that. I think I: -add percentage uncertainty of stress and strain together (i think this is the total percentage uncertainty so the young modlus unceratinty??) -then i use this percentage to find no% of ...
  43. physics

    To calculate the young modulus uncertainty do you add together the percentage uncertainty of strain and stress and if not then what do u do. Please dont send websites just tell and help me out.
  44. Physics

    plz answer
  45. Physics

    i also dont get how to work out damons last line if his is right
  46. Physics

    Damon said: v = Vi + a t where t is AFTER 0.6 s v = 30 + a t so x = Xi + Vi t + (1/2) a t^2 a will be negative of course Xi is 18 when t = 0 x = 18 + 30 t + (1/2) a t^2 -i dont know what xi means -if this wiill result in yuor answer or the mark scheme answer but just sent it ...
  47. Physics

    Please tell me what you think of the mark scheme answer what they did and if now looking at this mark schee answer you stillthink that it is wrong and your answer is right? just as i want to make sure my notes are right.
  48. Physics

    Thank you, finally someone who answered, I have been waiting ages for this questions answer. So you saying that your 100 percent sure that is the answer and the mark scheme which the examiner made is wrong?? This is what the mark scheme said for braking distance: BRAKING ...
  49. Physics

    Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The reaction time of a driver ...
  50. math/science

    not 0
  51. math/science

    60
  52. math/science

    the cars acceleration is zero
  53. Damon As physics

    I reposted like you asked and i included the full question and my working out and what i need help with so pplease help
  54. As physics

    Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The reaction time of a driver ...
  55. physics As

    by the wa for the table 5 is above 2 10 is above 8 andso on the space i leftr arent posted/shown
  56. physics As

    Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The reaction time of a driver ...
  57. physics As

    Please help i hvae been confused on this for ages
  58. physics As

    What i think s dunno u 30 v dunno a 9.81 t dunno someone used the equation v=u+at and s=ut+1/2at^2 if t is zero then i think v is 30 after putting the numbers in. then.. oim confused using suvat and where the numbers came from please help
  59. physics As

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says: Thinking distance= 30 X 0...
  60. As physics

    There is a right angle triangle: -.- -...- -......- -.........- T (wire) -............- -...............- ------------------ 30 degrees ....--.....--.....rod...
  61. physics

    do the same positive power 2 on both sides cancel out or the opposite - and + powers
  62. physics

    do these cancel out and why/why not? S^2 = S^2 S^-2 = S^2
  63. As physics

    I know 1 is in equilibrium. 2 is not. 3 I'm not too sure about.
  64. As physics

    A 2.0 rigid rod with negligible weight is subject to forces in three different ways as shown in diagrams 1-3 below. diagrams: 1- middle point: 2.0 N distance on both sides: 1.0 m apart forces below at the end of each side: 1.0 N 2- distance on both sides: 1.0 m apart force ...
  65. As physics

    I'm am very stuck on this one so I dont have working out and need all steps.
  66. As physics

    (As physics working out please) (SI UNITS) Which physical quantity has the same base units as energy? SHOW ALL WORKING OUT! A:Moment B:Momentum C:force D:pressure
  67. As physics

    I think magnitude means how much of something or how long the sides are or the angle.
  68. As physics

    What does decreased in MAGNITUDE mean?
  69. As physics

    ...........---y---- .........----------- ......------------------- ...-------------------------- . x----------------------------z is the picture
  70. As physics

    and equal on both side
  71. As physics

    It looks kinda like the last image i posted but its a curve
  72. As physics

    ...........---y---- .........----------- ......------------------- ...-------------------------- . x----------------------------z
  73. As physics

    Y -- - -- --- - - ----- -- - -------------- - - ----------------- - X Z
  74. As physics

    Y - - - - - - - - - - X Z
  75. As physics

    Here I've already written what I thought of the question in caps lock and the thing I dont know at the bottom.
  76. As physics

    Describe how the vertical component of the velocity of the water varies form point X to point Z? Image with a flat horizontal line with a curve on top (beg curve: X, top middle curve: Y, End bottom curve: Z) Mark scheme Answer: decreases from x to y DON’T GET I thought it...
  77. As physics

    I think this is because of no movement...??
  78. As physics

    How is kinetic energy lost on impact to the ground?
  79. As physics

    I am in as and we dont use those symbols so im confused
  80. As physics

    I wrote what I do know and the caps lock is what I dont know, and that is the working out for braking distance shown above is confusing to me.
  81. As physics

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says: Thinking distance= 30 X 0...
  82. As physics

    The drag force acting on a car travelling at a speed v is given by the equation F=kAv^2 Where A is the area of the front of the car. Show that a suitable unit for the quantity k is kgm-3. Mark scheme answer: F= kgms-2 or A=m2 V=ms-1 Which is K=kgm-3 I am confused could someone...
  83. As physics

    In a hockey match a hockey ball is hit 18m from the front of the goal. The ball leaves the hockey stick with initial velocity v at angle theta to the horizontal ground. The ball passes over the goal at a maximum height of 2.0m. The initial vertical component of the velocity of...
  84. As physics

    Could a physics expert please help out with my other questions please?
  85. As physics

    In a hockey match a hockey ball is hit 18m from the front of the goal. The ball leaves the hockey stick with initial velocity v at angle theta to the horizontal ground. The ball passes over the goal at a maximum height of 2.0m. The initial vertical component of the velocity of...
  86. As physics

    The drag force acting on a car travelling at a speed v is given by the equation F=kAv^2 Where A is the area of the front of the car. Show that a suitable unit for the quantity k is kgm-3. Mark scheme answer: F= kgms-2 or A=m2 V=ms-1 Which is K=kgm-3 I am confused could someone...
  87. As physics

    The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says: Thinking distance= 30 X 0...
  88. As physics

    How is kinetic energy lost on impact to the ground?
  89. As physics

    So would collision is ELASTIC mean: the two objects don't stick together and move with different velocities? ?????
  90. As physics

    What does collision is INELASTIC mean?
  91. As physics

    Image with a flat horizontal line with a curve on top (beg curve: X, top middle curve: Y, End bottom curve: Z) Describe how the vertical component of the velocity of the water varies form point X to point Z? Mark scheme Answer: decreases from x to y DON’T GET I thought it...
  92. As physics

    What does decreased in MAGNITUDE mean?
  93. As physics

    (As physics working out please) Which physical quantity has the same base units as energy? SHOW ALL WORKING OUT! A:Moment B:Momentum C:force D:pressure
  94. physics

    A 2.0 rigid rod with negligible weight is subject to forces in three different ways as shown in diagrams 1-3 below. diagrams: 1- middle point: 2.0 N distance on both sides: 1.0 m apart forces below at the end of each side: 1.0 N 2- distance on both sides: 1.0 m apart force ...
  95. physics

    an ostrich can run a maximum speed of 70km per hour. You have to convert the 70km to 70000m. you have to convert the per hour part too and 1hr =60 min. Somehow the time becomes 3600, could someone please tell me how?