An object with a net charge of 34 µc is placed in a uniform electric field of 640 n/c, directed vertically. what is the mass of this object if it floats in this electric field? the acceleration due to gravity is 9.81 m/s 2 . answer in units of kg.

Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?

Which governments provide garbage collection services to homes and businesses

Me pl give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.