Put one of your thumbs at arm's length in front of your face. Now focus on something in the background and look through one eye at a time. What do you notice about your thumb?
A. It appears to move more when it's closer.
B. It appears to move less when it's closer.
C. It appears to move the same when it's closer.
D. It disappears entirely when it's closer!
E. None of the above.
Ans: A. It appears to move more when it's closer.
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Indicate whether the statement is true or false
A kilogram of water 
is stirred using a 400 watt device for 5 minutes. At the end of this time the temperature of the water has increased by
How much heat was lost to the surroundings?
A. 90.1 kJ B. 57.3 kJ C. 82.6 kJ D. 38.9 kJ
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A. 2.00 m/s NORTH. B. 1.21 m/s SOUTH. C. 1.21 m/s NORTH. D. 0.11 m/s SOUTH. E. 0.11 m/s NORTH.
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A. Antares B. Vega C. Thuban D. Polaris