Amissile is fired from a jet flying horizontally at mach 1 (1100 ft/s). the missile has a horizontal acceleration of 1000ft/s. calculate its horizontal velocity at 10.0 seconds after it is fired

During takeoff, the sound intensity level of a jet engine is 170db at a distance of 34 m. what's the sound intensity level at a distance of 1.0 km?

If a simple machine reduces the strength of a force, what must be increased?

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?