Imagine a 40,000-km steel pipe that forms a ring to fit snugly entirely around the circumference of earth. suppose that people along its length breathe on it so as to raise its temperature by 1°c. the pipe gets longer—and is also no longer snug. how high does it stand above ground level? show that the answer is an astounding 70 m higher! (to simplify, consider only the expansion of its radial distance from the center of earth, and apply the geometry formula that relates circumference c and radius r:  c=2πr.)

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?

Which two particles are found in the center of an atom

Amass attached to a spring is displaced from its equilibrium position by 5cm and released. the system then oscillates in simple harmonic motion with a period of 1s. if that same mass–spring system is displaced from equilibrium by 10cm instead, what will its period be in this case? a mass attached to a spring is displaced from its equilibrium position by and released. the system then oscillates in simple harmonic motion with a period of . if that same mass–spring system is displaced from equilibrium by instead, what will its period be in this case? a) 0.5sb) 2sc) 1sd) 1.4s