Calculate the average binding energy per nucleon of 85
37Rb.
Answer in units of MeV/nucleon.

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

An object has a weight of 500 on earth what is the mass of this object