What is a bright streak of light that results when a meteoroid burns up in earth's atmosphere?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?

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.

Identify some abiotic characteristics of the tundra biome.