Which type of mirror can produce a real image?
A. plane
B. diverging
C. converging
D. No mirror can produce a real image.
Ans: C. converging
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A grinding wheel is spinning at a rate of 20.0 revolutions per second. When the power to the grinder is turned off, the grinding wheel slows with constant angular acceleration and takes 80.0 s to come to a rest
(a) What was the angular acceleration of the grinding wheel as it came to rest? (b) How many rotations did the wheel make during the time it was coming to rest?
When you add heat to ice, its temperature always stays constant
a. True b. False Indicate whether the statement is true or false
An inventor wants you to finance construction of a machine that will do work by running a continuous chain through a pulley, letting weights attached every so often fall down do the work
The machine should run forever, because the weights will fall again and again as the chain goes round the pulley. You both can sell energy so cheaply, you'd make millions. Should you invest $100,000? Why or why not?
Why can neither Venus nor Mercury remain visible throughout the night as the full Moon does?
What will be an ideal response?