A submarine on the surface of water sends out a wave pulse that reflects at the bottom of the ocean and returns back. The submarine detects the time between the transmission of the pulse and the arrival of the reflected pulse as 2.5 s and the depth of the ocean is 1875 m at that point. What is the speed with which the wave travels in water 1500 m/s

750 m/s

340 m/s

375 m/s

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?

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

In which type of system is power held solely by the central government and not shared with regional governments? group of answer choices federal unitary confederate oligarchic