Supansa

Popular questions and responses by Supansa
  1. physics

    a particle having a charge of -2.0 x 10^-9 is acted on by a downward electric force of 3.0 x 10^-6 in a uniform electric field. what is the magnitude and direction of the electric force exerted on a proton placed in this field. what is the gravitation

    asked on September 6, 2016
  2. science

    A thin non-conducting rod is bent to form the arc of a circle of radius a and subtends an angle at the center of the circle. A total charge q is spread uniformly along its length. Find the electric field at the center of the circle in term of, a, q, and

    asked on September 6, 2016
  3. physics

    A thin non-conducting rod is bent to form the arc of a circle of radius a and subtends an angle at the center of the circle. A total charge q is spread uniformly along its length. Find the electric field at the center of the circle in term of, a, q, and

    asked on September 6, 2016
  4. Physics

    At time t=0 an object of mass 50.34 g on the end of a horizontal spring is moving to the right at 10 cm/s and is displaced 2 cm to the left from the equilibrium position. If the spring constant is 0.234N/m, find an expression for the position of the

    asked on May 15, 2016
  5. Physics

    At time an object of mass 50.34 g on the end of a horizontal spring is moving to the right at 10 cm/s and is displaced 2 cm to the left from the equilibrium position. If the spring constant is 0.234N/m, find an expression for the position of the particle

    asked on May 11, 2016
  6. Physics

    Find the speed of a pendulum bob at the bottom of its swing if its initial displacement is 5.34o and its period is 2.534 s.

    asked on May 10, 2016
  7. Physics

    At time an object of mass 50.34 g on the end of a horizontal spring is moving to the right at 10 cm/s and is displaced 2 cm to the left from the equilibrium position. If the spring constant is 0.234N/m, find an expression for the position of the particle

    asked on May 10, 2016
  8. Physics

    A cubical metal box has side L=10.34cm and mass m=150 g. How much mass must be placed inside the box if it is to float in water with its top at the surface?

    asked on May 5, 2016
  9. Physics

    An engineer decides to use a successful dam design for a new lake of the same depth. If the new lake has ten times the surface area as the lake held by the original dam, what, if any, design changes are necessary for the new dam to hold back the increased

    asked on May 5, 2016
  10. Physics

    A pipe of constant diameter 13.4 cm carries water up a hill 30.34 m high. How much pressure is required at the bottom of the hill if the water is to reach the top?

    asked on May 5, 2016
  11. Physics

    Ball A is attached to a string of length l=13.4 m and is released from rest. Ball B is released from rest and falls straight down. Which of the following statements for what happens at point P are correct, and which are incorrect? Explain your reasoning

    asked on March 16, 2016
  12. Physics

    A pinball machine has balls of mass 134 g. The springs have a spring constant of 93.4N/m and a relaxed length of 10 cm. To what length must the spring be compressed if it is to give a ball a speed of 2.0 m/s?

    asked on March 15, 2016
  13. Physics

    What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun

    asked on March 15, 2016
  14. Physics

    A pinball machine has balls of mass 134 g. The springs have a spring constant of 93.4N/m and a relaxed length of 10 cm. To what length must the spring be compressed if it is to give a ball a speed of 2.0 m/s?

    asked on March 15, 2016
  15. Physics

    What is the potential energy of the Earth, considered as an object orbiting the Sun? Compare your result with the kinetic energy of the Earth in its orbit. Given Earth mass = 6.34×1024kg , Sun mass =1.934×1030kg, and distance from the Earth to the Sun

    asked on March 15, 2016
  16. Physics

    A perfectly efficient machine (e=1) is used to move a 53.4 kg load. The input force moves a distance of 13.4 m as the load rises 1.34 m. What is the mechanical advantage of the machine? What is the magnitude of the input force?

    asked on February 25, 2016
  17. Physics

    A football player kicks a ball of mass 1.534 kg across the field using a constant force of 13.4 N over a distance 30.0 m. How much work does the football player do? If the ball was initially stationary, what is its final speed?

    asked on February 25, 2016
  18. Physics

    (a) Two boxes of different mass are at rest on a ramp. What is the minimum coefficient of static friction between the boxes and the ramp if the system is in equilibrium? Given M=(1+0.34)m (b) Suppose there is no friction between the upper box and the ramp.

    asked on February 25, 2016
  19. Physics

    A box of mass M sits on a table and is connected by a rope passing over a smooth support to another box of mass m that hangs over the edge of the table. (a) What is the acceleration of M ignoring friction (b) and if the coefficient of kinetic friction

    asked on February 25, 2016
  20. Physics

    A particle moves in three dimensional space as an equation r= (t^2+1.34t)i^+(3.34t-2)j^+(2t^3-4t^2)k^ where is in unit of meter and in second. a.Sketch the path of this particle b.Calculate velocity at t=2 s c.Calculate acceleration at t=2 s

    asked on February 21, 2016
  21. Physics

    (a) Two go-karts, A and B, travel around two circular tracks of radius 5 m and 10 m, respectively, each in 10.34 s. Does A or B have the greater acceleration? Which has the greater speed? (b)If instead the two go-karts travel around the two tracks at the

    asked on February 21, 2016
  22. Physics

    (a) Two go-karts, A and B, travel around two circular tracks of radius 5 m and 10 m, respectively, each in 10.34 s. Does A or B have the greater acceleration? Which has the greater speed? (b)If instead the two go-karts travel around the two tracks at the

    asked on February 20, 2016
  23. Physics

    A particle moves in three dimensional space as an equation r= (t^2+1.34t)i^+(3.34t-2)j^+(2t^3-4t^2)k^ where is in unit of meter and in second. a.Sketch the path of this particle b.Calculate velocity at c.Calculate acceleration at

    asked on February 20, 2016
  24. Physics

    Two students each hit a golf ball at the same speed, but the first student hits his ball at an angle of 60.34o with the horizontal, and the second student hits his at (30-0.34)o with the horizontal. Which ball goes further? Which one hits the ground first?

    asked on February 20, 2016
  25. Physics

    Two heavy balls are released from different heights, one 2.34 s after the other. If the two balls hit the ground at the same time, 4.0 s after the first is released, from what heights were they dropped?

    asked on February 20, 2016
  1. Science

    An organism that eats other organisms, living or dead, is called a consumer.

    posted on September 6, 2016