When looking into a tall glass of tea, you observe the tea looks darker when looking from top to bottom than when looking from the side of the glass through to the other side (assume the glass is colorless, no ice cubes). your observation is best explained by: a. differences in concentration of the tea
b. differences in pathlength
c. the effect of gravity
d. none

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.

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?