Amass m is attached to horizontal spring force constant k fixed one side to rigid support as shown in fig the mass oscillates in frictionless surface with time period t and amplitude a . when the mass is in equilibrium position another mass m is gently placed on it. what will be the new period of oscillation?

option (a)2pi root (m+m/k) (c)2pi root (m+m/2k)
(b) 2pi root (m-m/k) (d)2pi root (m-m/2k)

Carbon 14 is a naturally occurring stable

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency