The horizontal and vertical components of the initial velocity of a football are 24 m/s and 7 m/s respectively. What is the initial velocity of the football?
A) 31 m/s
B) 25 m/s
C) 17 m/s
D) 42 m/s
E) 625 m/s
B
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A boxcar without a front or a back is moving toward the right. Two electrons move through the boxcar, one moving from back to front toward the right, the other moving from front to back toward the left. According to me, each electron is moving with a speed of 0.8c, and the boxcar is moving with a speed of 0.6c. A passenger in the boxcar records how long it takes each electron to pass from one end
of the boxcar to the other end. According to the passenger, which took longer? a. the electron going from back to front b. the electron going from front to back c. They both took the same time. d. Since nothing can go faster than light, an electron cannot move toward the left with a speed of 0.8c through a boxcar moving toward the right with a speed of 0.6c.
Which of the following is a weak base?
a. NH3 b. NaOH c. KOH d. Ca(OH)2
From which language did the majority of star names originate?
a. Arabic b. Latin c. Greek d. Spanish e. Italian
List at least two of the notable exceptions to the general patterns of the solar system.
What will be an ideal response?