Two identical carts are set up to collide on a track in a physics classroom. Assume you may neglect friction between the carts and the track. Motion detectors are set up to measure the velocity of each cart both before and after the collision. The bumpers on the carts can be adjusted to change the elasticity of the collision. Three trials at different elasticity settings for the same initial velocities result in three different final conditions. In Trial A, the two carts come to rest as a result of the collision. In Trial B, the two carts bounce off each other and exchange velocities. In Trial C, the two carts bounce off each other and move with lower speeds than they had before the collision.
In a clear, coherent, paragraph-length response, identify the types of collisions associated with Trials A, B, and C. For each trial, describe the center-of-mass velocity before, during and after the collision. Also describe any energy changes during the interaction, clearly listing the objects in your system.

For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?