There is a clever kitchen gadget for drying lettuce leavesafter you wash them. It consists of a cylindrical container mountedso that it can be rotated about its axis by turning a hand crank.The outer wall of the cylinder is perforated with small holes. Youput the wet leaves in the container and turn the crank to spin offthe water. The radius of the container is 13 cm. When the cylinder is rotating at1.6 revolutions per second, what isthe magnitude of the centripetal acceleration at the outerwall?
You have two lenses at your disposal, one with a focal length
(a) Whichof these two lenses would you use to project an image of a lightbulb onto a wall that is far away?
(b) If you want to produce animage of the bulb that is enlarged by a factor of 2.00, how farfrom the wall should the lens be placed?
A gas istaken through the cyclic process described in Figure.
a) Find the net energy transferred to thesystem by heat during one complete cycle.
b) If the cycle is reversed -- that is, the process follows thepath ACBA -- what is the net energy input per cycle by heat?
Suppose
Evaluate
Remember to include a "+C" if appropriate.
If a cylindrical tank holds 100,000 gallons of water, whichcan be drained from the bottom of the tank in an hour, thenTorricelli's Law gives the volume V of water remaining inthe tank after t minutes as:
for: 0 is less than or equal to t which is less than or equal to 60
Find the rate at which the water is flowing out of the tank(the instantaneous rate of change of V with respect tot) as a function of t. What are its units? Fortimes t=0, 10, 20, 30, 40, 50, and 60 min, find the flow rate andthea mount of water remaining in the tank. Summarize your finding sin a sentence or two. At what time is the flow rate the greatest?The least?