My notes concrete sidewalks are always laid in sections, with gaps between each section. for example, the drawing shows three identical 2.4-m sections, the outer two of which are against immovable walls. the two identical gaps between the sections are provided so that thermal expansion will not create the thermal stress that could lead to cracks. what is the minimum gap width necessary to account for an increase in temperature of 44° c

a and c

explanation:

both a and c are correct answers to my knowledge, it's been a bit since i've done anything related to magnetic fields, but it should be right.

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:

b mirrors submit a iisner? e. for which optical devices does d sometimes have a positive value? o a a and b o b. a and c o c. b and d 0 d. b and cb

real, smaller and upside-down.   so the answer should be b.