An incandescent light bulb emits some heat to a room through radiation. approximate the light bulb as a sphere with radius 2.1 cm and having a surface temperature of 97 °c when turned on. a. what is the rate of heat transfer to the room with tsur 24 °c? the emissivity, e, of glass is 0.93. b. if the light bulb is a 25w light bulb, what fraction of the power going to the light bulb is used inefficiently to produce heat?

Write the overall equation for the reaction for lithium battery

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this