candle?️Vs Eno+Water? || Easy science experiment?u200d? || #trending #TheExking #Experiment #shorts

Two students X and Y have to do their experiment on plotting the temperature-time graph for a hot body as it cools to room temperature. They do their experiments in the same lab, using completely identical apparatus, take equal amounts of tap water heated up to the same temperature, start their observations simultaneously and note the temperature values at identically spaced intervals of time. Their temperature-time graphs, plotted on a given graph paper, with the same given choices of scales along the axis, are however, as shown: The following could be the reason for this difference: (A) Use of an overhead fan by student X. (B) Use of an overhead fan by student Y. (C) Less frequent stirring of water by student X. (D) Less frequent stirring of water by student Y. The most likely reason is:

The figure shows the commonly observed decrease in diameter of a water stream as it falls from a tap. The tap has internal diameter D_(0) and is connected toa large tank of water. The surface of the water is at a height b above the end of the tap. By considering the dynamics of a thin "cylinder" of water in the steam answer the following: (ignore any reistance to the flow and any effects of surface tansion, given rho_(w) = density of water) A student observes after setting up this experiment that for a tap with D_(0) = 1 cm at x = 0.3 m the stream diameter D = 0.9 cm . The heights b of the water above the tap in this case will be:

When a block of metal of specific heat 0.1 cal//g//^@C and weighing 110 g is heated to 100^@C and then quickly transferred to a calorimeter containing 200g of a liquid at 10^@C , the resulting temperature is 18^@C . On repeating the experiment with 400 g of same liquid in the same calorimeter at same initial temperature, the resulting temperature is 14.5^@C . find a. Specific heat of the liquid. b. The water equivalent of calorimeter.