A concave mirror with a focal length of 20.0 cm is used to observe the image of a 1.75 cm tall candle. The candle is placed 15.0 cm in front of the mirror. The image is
A. inverted, 7.00 cm tall, and located 60.0 cm from the mirror
B. inverted, 0.438 cm tall, and located 60.0 cm from the mirror
C. erect, 7.00 cm tall, and located 60.0 cm from the mirror
D. impossible to see

Unpolarized light whose intensity is 1.19 w/ is incident on a polarizer. (a) what is the intensity of the light leaving the polarizer? (b) if the analyzer is set at an angle of = 41.0∘ with respect to the polarizer, what is the intensity of the light that reaches the photocell?

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.

The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?