On a hot summer day, a student turns his ceiling fan on when he leaves his room in the morning. When he returns in the evening, he finds his room to be of the same temperature as the neighboring rooms because no extra energy was added to the room air. Why? Assume that all the doors and windows are kept closed.

Asingle-geared blanking press has a stroke of 200 mm and a rated capacity of 320 kn. a cam driven ram is assumed to be capable of delivering the full press load at constant force during the last 15 percent of a constant-velocity stroke. the camshaft has an average speed of 90 rev/min and is geared to the flywheel shaft at a 6: 1 ratio. the total work done is to include an allowance of 16 percent for friction a) estimate the maximum energy fluctuation b) find the rim weight for an effective diameter of 1.2 m and a coefficient of speed fluctuation of 0.10

Wiy doeres rere okhn a pump whon working betwon the same pressure range?

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?