A driver traveling 40 km/h sees a child run onto the road 13 m ahead of his noisy old car. He applies the brakes, and the noisy old car decelerates uniformly at 8.0m/s. The driver's reaction time is 0.25s. Will the noisy old car hit the child?

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

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

How does an observation about an object differ from an inference about that object