If a beaker of water is placed under a broiler so that the heating coil is above the beaker. It is observed that only the surfac
e layer boils. The water at the bottom of the beaker remains close to the initial temperature of the water. Which of the following statements is the most reasonable conclusion to be drawn from these observations? a) Water is a poor conductor of heat.
b) The sample must contain impurities.
c) Water is easily heated by radiation.
d) Water exhibits anomalous thermal behavior.
e) The molecular motion in the sample is not random.
The most reasonable conclusion of the above phenomenon is that water is a poor conductor of heat. Basically water is an insulator. The heat from surface to the bottom of the beaker will take a lot of time. Moreover, no convection current is formed so, heat might not even reach the bottom surface. Hydrogen bonding also play a vital role in determining the thermal properties of water.
He performed a streak test, in which a piece of the mineral is rubbed across a piece of unglazed porcelain in order to determine the color of the mineral in powdered form.
The correct formula for calculating the tangential speed of an orbiting object is V(t)=wr. V(t)= Tangential Speed w= Angular Velocity r= Radius of the Path
