Is it possibe for a nucleus to exist with more than one proton but no neutrons?

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)

Aregular polygon has angkes of size 150° each.how many side has the polygon

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?