- 2018: A metal ball is suspended from a thread in a vacuum chamber. The ball is heated with a flame and its temperature is raised to $T$ K. The tension in the thread will (A) increase (B) decrease (C) remain the same (D) become zero
The answer is: (A)
Explanation:
The tension in the thread will increase as the ball is heated. This is because the ball will expand as it heats up, which will cause the thread to stretch. The greater the temperature of the ball, the greater the tension in the thread will be.
