Suppose a major impact that produces a mass extinction takes place on earth once every 5 million years. suppose further that if such an event occurred today, you and most other humans would be killed (this would be true even if the human species as a whole survived). such impact events are random, and one could take place at any time. calculate the probability that such an impact will occur within the next 50 years (within your lifetime).

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.)

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped