A point charge Q resides at the origin. A particle of mass 0.001 kg carries a charge of 3 µC. The particle is released from rest at x = 2 m, and its kinetic energy as it passes x = 0.5 m is 0.36 J. Find the charge Q. The Coulomb constant is 8.98755 × 109 N · m 2 /C 2 . Answer in units of µC.

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

Describe cytokinesis in plants and animals. in animals: in plants.

Your friend increases her force on the desk by 30n . she doesn't change the direction of her push . what happens to the net force on the desk .will the desk accelerate