Entropy, the measure of a system’s thermal energy per unit temperaturethat is unavailable for doing useful work. Because work is obtained from ordered molecular motion, the amount of entropy is also a...
Do you know that whenever energy is added to the system, the system gains mass? Is there any example of conversion of energy to mass and vice - versa? Yes. A spring's mass increases whenever it is put...
Key points: Friction does not oppose the motion, but it opposes relative movement between the contact surfaces. When there is no relative motion between the contact surfaces, then no friction force...