The magnitude of the resultant of two vectors cannot be less than the magnitude of either of those two vectors
A) True
B) False
B
Physics & Space Science
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Which of the following statements is true of T Tauri stars?
A) They are often surrounded by thick disks of gas and dust. B) They have completely inactive chromospheres. C) They have very weak magnetic dynamos. D) They are post-main-sequence stars.
Physics & Space Science
Power: A 100-W light bulb is operated by a 110-V dc source. What is the resistance of this bulb?
A. 100 ? B. 8.0 × 10-3 ? C. 6.0 × 10-3 ? D. 120 ? E. 240 ?
Physics & Space Science
When a planet the size of Jupiter passes in front of a star the size of our Sun, the drop in the intensity is about _____ percent.
A. 1 B. 2 C. 3 D. 4
Physics & Space Science
If an all-electric car has kinetic energy, then it also must have
A) impulse. B) momentum. C) acceleration. D) force. E) none of the above
Physics & Space Science