What is characteristic of both sound waves andelectromagnetic waves? (1) they require a medium.(2) they transfer energy.(3) they are mechanical waves.(4) they are longitudinal waves.

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

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i believe it is b. what was the cause of the big bang

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