Your eye's iris changes the size of your pupil to adjust the amount of light that enters your eye
a. True
b. False
Indicate whether the statement is true or false
True
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An atom gains one extra electron. How does the resulting ion behave when it is near a positively charged transparency? How does the ion behave when it is near a negatively charged tissue?
A) The ion is attracted to the positively charged transparency, but repelled from the negatively charged tissue. B) The ion is repelled from both the transparency and from the tissue. C) The ion is repelled from the positively charged transparency, but attracted to the negatively charged tissue. D) The ion is attracted to both the transparency and to the tissue.
Which of the following is not expected for a "hot Jupiter" that orbits 0.05 AU from its star?
A) cloudtop temperatures over 1000 K B) intense volcanism C) clouds made of rock dust D) density similar to or lower than Jupiter's
A long straight wire (diameter = 2.0 mm) carries a current of 30 A. What is the magnitude of the magnetic field 2.5 mm from the axis of the wire?
a. 3.2 mT b. 2.8 mT c. 2.4 mT d. 3.6 mT e. 3.0 mT
Why would anyone be interested in mining material from an asteroid?
What will be an ideal response?