A nucleus whose mass is 3.680784 × 10−25 kg undergoes spontaneous "alpha" decay. The original nucleus disappears and there appear two new particles: a He-4 nucleus of mass 6.640678×10−27 kg (an "alpha particle" consisting of two protons and two neutrons) and a new nucleus of mass 3.614271 × 10−25 kg (note that the new nucleus has less mass than the original nucleus, and it has two fewer protons and two fewer neutrons). (a) When the alpha particle has moved far away from the new nucleus (so the electric interactions are negligible), what is the combined kinetic energy of the alpha particle and new nucleus?
(b) How many electron volts is this?

The movement of electrons between atoms is called an

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.