Ajackhammer is causing vibrations in a wall that is connected to the concrete being jackhammered. when the hammer is stopped, the wall ceases to vibrate. this type of vibration is:
resonance
forced vibration
an example of beats
none of the above

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.