Please clarify what it says in the picture. All I can say right now is to remember Newton's first law of motion; an object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an outside force.
Answer: 98,000 J
Explanation: The total energy or mechanical energy is expressed in the following equation:
ME= PE + KE
PE = mgh
= 1000 kg x 9.8 m/s² x 10m
= 98000 J
ME = PE - KE
= 98000 J - 0 J
= 98000 J
The answer is B tell me if I am wrong.
Answer:Answer:
They are inhaled or eaten
Explanation:
Radioactivity can be defined as the process in which an unstable atomic nucleus spontaneously emits ionizing radiation and charge particles. This eventually results in the formation of an energetically stable atomic nucleus.
Examples of radioactive elements are Uranium, Polonium, Thorium, Radon, etc. The radiation emitted during this process is classified as;
1. Alpha radiation (α).
2. Beta radiation (β).
3. Gamma radiation (G).
Alpha-emitting substances, such as radon gas, can be a serious health hazard only if they are inhaled or eaten. Alpha-emitting substances compared to other radiation has very short-range particle and as such cannot penetrate the human skin or body.
