Bonjour, pouvez vous m'aidez svp je dois rendre ce travail avant dimanche et je n'y arrive pas .
je vous ai mis en piece jointe le travail
merci de m'aider

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?