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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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.
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
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.
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