What are Secondary cells? Secondary cells, or rechargeable cells or rechargeable batteries, are energy storage devices that can be repeatedly charged and discharged. Unlike primary cells (non-rechargeable batteries), secondary cells can be reused multiple times, making them more cost-effective and environmentally friendly. Secondary cells function through reversible electrochemical reactions that occur when the cell is …
The center of mass (also known as the center of gravity) is a concept used in physics to describe the average position of the mass distribution of an object or system of objects. It is the point at which the total mass of the object or system can be considered to be concentrated. In a …
The speed of sound is the distance that a sound wave travels in a given amount of time. The speed of sound depends on the properties of the medium through which it is traveling, such as its density and stiffness. In air at sea level and at a temperature of 20 degrees Celsius (68 degrees …
Work Done against Gravity occurs when an object is lifted against the force of gravity. The work done against gravity is equal to the force of gravity acting on the object multiplied by the vertical distance that the object is lifted. This can be expressed mathematically as: Work against gravity = (Force of gravity) X (Vertical …
Thermal expansion refers to the tendency of a material to expand or contract in response to changes in temperature. When a material is heated, the individual particles that make up the material vibrate more rapidly, which causes them to move apart and take up more space. This results in an increase in the overall size …
Thermal equilibrium refers to a state in which two or more objects or systems are in thermal contact and have reached a common temperature. When objects are in thermal equilibrium, there is no net transfer of heat between them. This concept is based on the understanding of the second law of thermodynamics, which states that …
The transformation of energy refers to the conversion of energy from one form to another. Energy exists in various forms, such as mechanical, thermal, chemical, electrical, and electromagnetic, and it can be changed or transferred between these different forms through physical or chemical processes. Energy transformations are a fundamental concept in physics and play a …
What are Transuranic elements? Transuranic elements are elements that have atomic numbers greater than that of uranium (92), which means they have more than 92 protons in their nucleus. All transuranic elements are synthetic, meaning they do not occur naturally on Earth and must be created in a laboratory by nuclear reactions. The most well-known …
What are Transverse waves? Transverse waves are a type of wave that propagates perpendicular to the direction of its energy transfer. In other words, the oscillations of particles or the disturbance in the medium occur perpendicular to the wave’s motion. This distinguishes transverse waves from longitudinal waves, where the particles or disturbance move parallel to …
The laws of reflection describe how light behaves when it interacts with a reflective surface. These laws govern the angles at which incident light rays and reflected light rays interact with the surface. First law of Reflection The first law of reflection states that the incident ray, the reflected ray, and the normal to the …
