Draw a sketch and use a brief analysis based on course notes: Determine the torque necessary to impose rotation rate of 1 rotation/sec for a concentric cylinder (Couette) device. The inner cylinder is 23 mm and the outer radius is 25 cm, and the length of the cylinders is 5 cm. The fluid in the gap has viscosity of 1 Pa. s. Recall that 1 rotation is 360 degrees.

Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?