Suppose a bat uses sound echoes to locate its insect prey, 3.29 m away. (a) Calculate the echo times (in s) for temperatures of 13.0°C and 26.5°C. (Enter your answer to at least 4 significant figures.)

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

How many atoms of nitrogen are in the chemical formula ni(w on

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?