Answers edited by MetaPhysik

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• The rate of rotation of a solid disk with a radius of `2 m` and mass of `2 kg` constantly changes from `5 Hz` to `9 Hz`. If the change in rotational frequency occurs over `4 s`, what torque was applied to the disk?
  
• If there is a nonzero net force acting on an object, what is happening to the motion of that object?
  
• What is the frequency of the body at the centre of the earth?
  
• Question #7cd1e
  
• Question #39ff1
  
• Question #ccb06
  
• A boy is sat at a semisphere with a ray of 18.4 m. He starts sliding. On what height will the boy loose contact with the sphere? There is no friction.
  
• If the earth were to suddenly contract to`(1/n)th` of its present radius without any change in its mass, the duration of the new day will be nearly (in hours) ??
  
• If an electron is placed in an electric field with a potential difference of (1.35x10^2) V, the maximum speed the electron can attain is?
  
• An object is thrown with half of the kinetic energy needed to free an object from the attraction of the earth. How far will the object reach from the earth's surface?
  
• Which of the following is the image of the number in the mirror?
  
• A `5` `L` container holds `8` mol and `5` mol of gasses A and B, respectively. Groups of five molecules of gas B bind to two molecules of gas A and the reaction changes the temperature from `100` `K` to `240` `K`. How much does the pressure change?
  
• Question #108b1
  
• Question #68b86
  
• Two smaller spherical raindrops collide and merge into one larger spherical raindrop. What is the radius and surface energy of this larger drop, compared to the two smaller ones?
  
• Question #fe66b
  
• Can someone verify my answer?
  
• An object's two dimensional velocity is given by `v(t) = ( t^2 +2t , cospit - 3t )`. What is the object's rate and direction of acceleration at `t=1`?
  
• After 2 seconds of flight,the velocity of a projectile is (12i-4j)m/s,Find its speed and elevation at moment of projection?
  
• Angular momentum of a particle rotating with a central force is constant due to..??