Think and Grows

  ​​ In simple, pendulum of the clock moves slow during summer is due to thermal expansion of solids and moves faster during winter is due to contraction of solids. Pendulum of the clock is made up of a metal, will be heated up due to increase in the temperature of the surroundings in summer which leads to expansion of the pendulum (linear expansion), Whereas during winter, the metal contracts due to decrease in the temperature of surroundings. As you know, temperature is directly proportional to length, the length of the metal changes based on the temperature change. Hence, we find a a small gap between the needle and pendulum edge, so that it wont collide due to change in the temperatures. As temperature is inversely proportional to frequency of the vibrations (t=1/f), the pendulum moves slow in summer season and fast in winter season. Hence, we will be setting up the time during winter and summer seasons.

 The main function of cooling tower is to cool down and condense the hot water vapor coming out of the power plant and get liquid water back to use it again. Inside the cooling tower there is only mesh structure made of pipe lines, in which hot water vapor is supplied and cooled down into liquid vapour but natural convection, as shown below. But nothing is 100% efficient. During this cooling process, about 2% of water vapor escapes from condensation and get out of the tower from the top and that we see as white cloudy stuff. In a huge size of cooling tower of power plant running on full load, water escapes 6000 gallon per hour in the form of vapor. Shape of cooling tower helps to increase the cooling rate by creating the flow of air inside of it. Warm, moist air naturally rises due to the density differential compared to the dry, cooler outside air. Warm and moist air is less dense than drier air at the same pressure. This moist air buoyancy produces an upwards current of air through t