Why does the Milky Way appear as a bright band from Earth?
A: Because it's a band type galaxy.
B: Because it would look like a beautiful spiral if we could see it the ultraviolet.
C: Because it would look like a beautiful spiral if it weren't for the dust.
D: Because we are inside it and looking through the disk.
E: Because it's really steam coming out of the Teapot (the asterism in Sagittarius).
Ans: D: Because we are inside it and looking through the disk.
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When a car goes around a curve at twice the speed, the centripetal force on the car doubles
a. True b. False Indicate whether the statement is true or false
The number of daylight hours before 12 noon is approximately the ______________ as the number after 12 noon
Fill in the blank(s) with correct word
You push your 2 kg physics book along a tabletop, pushing it with 10 newtons of force. If the book is greased so that friction is negligible, the book's acceleration is
A) zero. B) 0.2 m/s2. C) infinitely large. D) 5 m/s2. E) 20 m/s2.
A 0.16 pF parallel-plate capacitor is charged to 10 V. Then the battery is disconnected from the capacitor. When 1.00 × 10^7 positive charges of magnitude |e| are now placed on the positive plate of the capacitor, the voltage between the plates changes by
a. ?5.0 V. b. ?1.1 V. c. 0 V. d. +1.1 V. e. +5.0 V.