A purple ball that has a mass of 4.2 kg and an orange ball with a mass of 4.7 kg collide in an elastic collision. The purple ball is initially moving to the left with a velocity of 15 m/s. The orange ball is moving to the right with a velocity of 12 m/s. If the final velocity of the orange ball is 11.3 m/s, what is the final
velocity of the purple ball?

The car hoist allows the car to be driven onto the platform, after which the rear wheels are raised. if the loading from both rear wheels is 1380 lb, determine the force in the hydraulic cylinder ab. neglect the weight of the platform itself. member bcd is a right-angle bell crank pinned to the ramp at c. the force is positive if in tension, negative if in compression.

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?

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant