Question

what kind of nuclear radiation consists of the most massive and slowest particles? select one: a. beta b. gamma c. alpha d. neutron cutting a cake is an example of what type of change? select one: a. chemical b. electrical c. physical d. nuclear

Explanation:

For the first question: Alpha particles consist of 2 protons and 2 neutrons, making them the most massive of the listed radiation types, and they have the lowest speed (typically around 5-7% the speed of light) compared to beta, gamma, and neutron radiation. Gamma is electromagnetic radiation (massless), beta is an electron/positron (much less massive than alpha), and neutrons are single particles with less mass than an alpha particle.
For the second question: Cutting a cake only changes its shape and size, not its chemical composition. No new substance is formed, which defines a physical change. Chemical changes involve new substances, electrical changes involve energy transfer via electricity, and nuclear changes affect atomic nuclei.

Answer:

1. c. Alpha
2. c. Physical