Sound is produced by a school bell through a process called vibration. When the bell is struck by a clapper or hammer, it begins to vibrate back and forth. These vibrations create compressions and rarefactions in the surrounding air. Compressions are areas of high air pressure, while rarefactions are areas of low air pressure. These … Read more
Explain the first law of thermodynamics. When work is done through heat, heat and work are proportional to each other. That is, energy can be transformed into heat, internal energy, and work, but it cannot be created or destroyed. This is the main idea of the first law of thermodynamics. What are the three laws … Read more
What is the apparent expansion of a liquid? Explain. When a liquid is heated in a container, the expansion of the liquid that is observed, i.e., the expansion of the liquid when the expansion of the container is not considered, is called the apparent expansion of the liquid. When a liquid is heated in a … Read more
The electromagnetic force is defined as the force exerted by two charged particles or bodies on each other due to their charges. This force may be of both types- attractive or repulsive.
The rate of velocity of a freely falling body on earth due to force of gravity is called the acceleration due to gravity.
The change in the position of an object along a definite direction with time with respect to some frame of reference is called displacement of that object.
The ratio of available effective power from a machine to the total power given is called efficiency.
Third law of falling bodies- The distance traversed by a freely falling body from rest in a given time is directly proportional to the square of the time.