2. A student places a sound detector on soil type A. 300 m from an explosive source(a) The sound detector records two distinct pulses of sound after the explosive source is
detonated. The first pulse takes 0.15 s to reach the detector and the second pulse takes
0.94 s. Calculate the speed of sound in air and in soil type A

please see the image and answer

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

What are the three ways that an object can accelerate

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.