Radioactive decay
The emission of energy to produce ionizing radiation is known as radioactive decay. Alpha, beta particles, and gamma rays are examples of ionizing radiation that could be released. Radioactive decay happens in radionuclides, which are imbalanced atoms. This periodic table's elements come in a variety of shapes and sizes. Several of these kinds are stable like nitrogen-14, hydrogen-2, and potassium-40, whereas others are not like uranium-238. In nature, one of the most stable phases of an element is usually the most prevalent. Every element, meanwhile, has an unstable state. Unstable variants are radioactive and release ionizing radiation. Certain elements, including uranium, have no stable forms and are constantly radioactive. Radionuclides are elements that release ionizing radiation.
Artificial Radioactivity
The radioactivity can be simply referred to as particle emission from nuclei due to the nuclear instability. There are different types of radiation such as alpha, beta and gamma radiation. Along with these there are different types of decay as well.
![**Title:** Conservation of Angular Momentum in Skaters
**Description:**
The diagram illustrates a scenario where twin skaters approach each other and lock hands.
**Diagram Explanation:**
- **Figure (a):** Shows the initial position where two skaters are moving towards each other with a linear velocity \( v = 1.80 \, \text{m/s} \).
- **Figure (b):** Depicts the skaters after locking hands, rotating around their center of mass with angular velocity \( \omega \).
**Problem Statement:**
**(a)** Calculate their final angular velocity in rad/s, given:
- Each skater has an initial speed of 1.80 m/s.
- Each skater has a mass of 70 kg.
- The centers of mass are 0.890 m from their locked hands.
- Approximate their moments of inertia as point masses at this radius.
**Question:** What is the angular momentum of an object moving with a linear velocity about a given point? (Provide your answer in rad/s.)
**(b)** Compare the initial and final kinetic energy.
\[
\frac{KE_i}{KE_f} = \text{?}
\]
**Explanation:** Initially, the two skaters have translational motion, while after the collision, the motion is purely rotational.
Each section challenges students to apply principles of conservation of angular momentum and energy transformation to solve real-world physics problems.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe7370c0b-05cc-48e6-9b0a-29a272be895a%2F6645322a-bba2-4cb3-b320-ea89b5a2c55c%2F6l4enmc_processed.png&w=3840&q=75)
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