radar sensors on high-altitude aircraft and on space platforms such as the space shuttle have been used to produce three-dimensional maps of earth’s surface. these radar sensors use electromagnetic wavelengths that have the lowest energy. what type of electromagnetic radiation do these radar sensors use?

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers