Мальчик вышёл из школы и пошёл домой. первый километр пути он прошёл за 0,2 ч, а оставшиеся 2 км его подвёз на велосипеде друг, затратив на это 0,1 ч. с какой средней скоростью двишался мальчик?

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good