A glass bottle full of mercury has a mass of 500 g on being heated through 35°c, 2.43 g of mercury expelled. calculate the mass of the mercury remaining in the bottle (cubic expansivity of mercury= 1.8 × 10^-4 k^-1 )( linear expansivity of glass = 8×10^-6 k^-1)​

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Which of the following best describes the circuit shown below?

Use 4 to 5 complete sentences, explain the concepts of beats and how beats are produces.