Experiment with different lens separations and orientations. Suppose you were asked to create an optical device which condensed a parallel beam of light (i. e., an input parallel beam of 2-cm diameter is converted to an output parallel beam of 1.5-cm diameter). Could you create such a device

On a average work day more than work place firs are reorted

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.