Carly has discovered a new radioactive isotope unicornium-210. Based on atomic mass alone which of the following elements could 210Ui not decay

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?