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  1. R

    Find the force constant fron the graph

    Hi all Find the force constant fron the graph k = 1/0.27 = 3.70 n/m ( is this ok ) plese I want your help
  2. R

    A typical compound archery bow requiers

    A typical compound archery bow requiers a force of 133 N to hold an arrow at "full drwa " ( pulled back 71 cm ). ssunimg that the bow obeys hooke's law . what is its spring constant ? did conver 71 to m did use k = W/x to find spring constant ? plese help me ?
  3. R

    Evalute the value of extension

    evaluate the value of extension ( x) which elongate under the action of load (w) of 6 N ? [Use your results obtained from rest 1 ] please help me How i can solve this question because I don't understand it clearly
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    A truck covers 80 m in 17 s while smoothly slowing down to a final speed

    A truck covers 80 m in 17 s while smoothly slowing down to a final speed of 5.6 m/s a ) find its original speed b) Final its acceleration I want check my answer : a ) Dx = 80 m t = 17 s v = 5.6 m/s v0= ?? by appling the rule Dx = 1/2(v+v0)t 80 = 1/2(5.6 + v0) 17 v0 =...
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    Questions in derivatives I want to check my answer

    Questions in derivatives I want to check my answer http://store1.up-00.com/Oct10/KpR43940.jpg [Broken]
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    I want check my answer in derivatives (part 2)

    I want check my answer in derivatives (part 2) http://store1.up-00.com/Oct10/7uV34128.jpg [Broken]
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    I want check my answer in derivatives (part 1)

    I want check my answer in derivatives (part 1) http://store1.up-00.com/Oct10/p0O34128.jpg [Broken]
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    How find the 3 value of x by using Calculator

    Hi all How find the 3 value of x by using Calculator u = 4x^3 - 4x = 0 I know this good way to solve iy 4x(x^2-1) = 0 X = 1 or X = -1 or X = 1 but I want a way bu useing a Calculator to find the 3 value of x plese help me .
  9. R

    Find an equation for the horizontal tangent to the curve y=x-3root x

    Hi a ) find an equation for the horizontal tangent to the curve y=x-3root x b) What is range of values of values of curve's slope ? c ) What is range of values of curve ? number a already I solved but my queation now in b and c ----- I try to solve b) to get curve's slope must...
  10. R

    The mass of rock is 2.4 kg anf its volume is 950 cm^3 .

    The mass of rock is 2.4 kg anf its volume is 950 cm^3 . Find its density in (a) g/m^3 9b) kg/cm^3 I attch the answer see pic [PLAIN]http://store2.up-00.com/Oct10/UyF43394.jpg [Broken]
  11. R

    To convert mg to kg

    Hi I want help to convert mg to kg ex: 1250mg --- > kg Are we multiply 1250mg X 10^-3 or multiply 1250mg X 10^-6 I want your help >>
  12. R

    A person travels by car from one city to another with different constant speeds

    A person travels by car from one city to another with different constant speeds between pairs of cities. She drives for 30.0 min at 80.0 km/h, 12.0 min at 100 km/h, and 45.0 min at 40.0 km/h and spends 15.0 min eating lunch and buying gas. (a) Determine the average speed for the trip. (b)...
  13. R

    What is the formula to use when found to time period and frequency the formula not w

    A sconds pendulum taks 1 s to move from one extreme to the other what is time period ? what is frequency ? what is the formula to use when found to time period and frequency the formula not writen in our note
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    Question on triangometry which one we measure ?

    see the pic [PLAIN]http://store2.up-00.com/Oct10/opW54159.jpg [Broken]
  15. R

    Question on triangometry, where i can put angle

    I face problem when i try to put the angle into the drwing like .... :
  16. R

    Question on triangometry .

    Hi all question on triangometry . I know solve this quetion put are we saying : tan = 6/6.7 = 0.8955 or tan =6/6.7 =0.0156 I don't n did we take tan or direct divide 6/6.7 = 0.8955 I want your help please .
  17. R

    One cubic centimeter (1.0 cm3) of water has a mass of 1.0 10-3 kg at 25°C. Determine

    One cubic centimeter (1.0 cm3) of water has a mass of 1.0 10-3 kg at 25°C. Determine the mass of 3.5 m3 of wa One cubic centimeter (1.0 cm3) of water has a mass of 1.0 10-3 kg at 25°C. Determine the mass of 3.5 m3 of water at 25°C. How i can solve this question ?
  18. R

    One gallon of paint (volume = 3.78 x 10-3 m3) covers an area of 25.0 m2 . What is the

    One gallon of paint (volume = 3.78 x 10-3 m3) covers an area of 25.0 m2 . What is the thickness ofthe fresh paint on the wall? I want the concept to solve ?
  19. R

    The amount of water in reservoirs is often measured in acre-ft. One acre-ft is a volu

    The amount of water in reservoirs is often measured in acre-ft. One acre-ft is a volume that covers an area of one acre to a depth of one foot. An acre is 43,560 ft2. Find the volume in SI units of a reservoir containing 30.0 acre-ft of water. I want the idea to solve this question then...
  20. R

    True or false : I want check my answer please

    True or false : It is possible to have motion in the absence of a force (F) beacuse no motion without force If an object is not moving , no external force acts on it (T) beacuse each object will not move unless a force acts on it If a single force acts on an object , the object...
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    A hiker begins a trip by first walking 25.0 km southeast from camp. On the second day

    A hiker begins a trip by first walking 25.0 km southeast from camp. On the second day she walks 40.0 km in a direction 60.0 north of east, at which point she discovers a forest ranger's tower. my answer is : Ax = A cos (60 ) R= A+B = 25 + 40 = 65 thanks
  22. R

    Check my answer ?

    Hi all >> I want to check my answer >>> ?? my answer : Vector -------X co ----- Y co A------------> - >>>>>> - B------------> + >>>>>> - A+B---------> + >>>>>> -
  23. R

    A car travels 20 km due

    Hi all A car travels 20 km due north and then 35 km in a direction 60 degree west of north. Find the magnitude and direction of the car's resultant displacement. How I can solve like this question ? I try to solve : the magnitude = R = A + B = 55 km direction of the car's...
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    Some properties of vectors - there is a point I don't understand it .

    Hi Two vectors A and B are equal if they have the same magnitude and the same direction . this property allows us to translate a vector parallel to itself in a diagram without affecting the vector . In fact , for most purposes, any vector can be moved parallel to itself without being...
  25. R

    How i can derivative this problem

    Hi all Queation say : x^2 - 2x + 3 / X^5 I try to solve y1 = X^2/X^5 - 2x/x^5 + 3 X^5 If this derivative is coorect if yes how i can complet >
  26. R

    Y = 9/4 - 3.3/2

    Hi all the Q y = 9/4 - 3.3/2 the answer = -9/4 but when i try to solve i don't dounf same the answer 9/4 - 3 . 3/2 9/4 + 9 / 2 18 + 36 / 8 = 22.5 this answer which I found regared
  27. R

    Questions in derivatives

    Hi all I hve two Q I want the explaine how to solve Q1 :(A) Find an equation for tangent to curve y = X^3 - 4X + 1 at the point (2,1) (b ) What is the range of values of the curve's slope Number ( A ) I can solve it but ( B) I face problem to solve...
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    Q in derivatives

    Q Find all older derivatives y = X^4/2 = 3/2X^2 -X y4 = 2X^2 - 3 x ^ 1 - 0 y4 = 4X^1 - 3 -0 y4 = 7
  29. R

    For the tringle shown what are the :

    For the tringle shown what are the : my answer : a )c = a2 - b2 81 - 49 = root 32 b ) tan Q = 2/7 = 0.28 C ) the angle sin = 9/7 = 1.28
  30. R

    A room is 25 ft long

    A room is 25 ft long , 20 ft wide and 15 ft tall . Express the volume of the room in cubic metres . [ 1m = 3.281ft] I sure my answer is wrong but I try Now we have 25 ft long , 20 ft wide and 15 we must change all this to cubic metres 3.281ft = 1m 25 X 3.281ft...
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