An astronaut in an experimental high speed spacecraft flies a mission several decades in the future. when the astronaut returns from his mission, instruments on board the spacecraft show that the elapsed time of the mission was 17.154 hours. however, in mission control, the elapsed time for the mission was 17.852 hours. how fast was the spacecraft moving?

What is the frequency of a light wave with a wavelength of 620nm

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.

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° 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.)