At the time t1 = 0, an object with a mass m = 8.01 kg passes through the origin with a velocity v1 m/s. At a time t2 = 2.00 s, the object is at the position r m. Assume that the force acting on the object during the time interval Δt = t2 − t1 is constant and determine the following.

(a) the kinetic energy of the object at the time t
(b) the force acting on the object during the time interval Δt = t2 − t1

Astate of matter all that has define volume and can flow is a(n)

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th