In a Milikan's apparatus, an oil drop of weight 2.0 x 10-15 kg acquires
two surplus electrons. When a p. d. of 620 V is applied between the pair
of horizontal metallic plates, the drop is in equilibrium. Find the
distance between the plates.
(10.0 mm)

explanation:

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.

explanation:

wind moving at higher speeds will transfer more energy to the water, resulting in stronger waves.