A v vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the acceleration of the ball is zero. We know that at t = 5 s,
a. the slope of the curve is non-zero.
b. the velocity of the ball is not changing.
c. the curve is not crossing the time axis.
d. the curve is at v = 0, t = 0.
b
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Given that a vector extends from the origin to (-5.0 cm, 8.0 cm), find the direction of the vector from the positive x-axis.
A. 32
B. 58
C. 148
D. 122
A 1.30-m long gas column that is open at one end and closed at the other end has a fundamental resonant frequency 80.0 Hz. What is the speed of sound in this gas?
A) 104 m/s B) 61.5 m/s C) 26.0 m/s D) 246 m/s E) 416 m/s
On the H-R diagram, red supergiants like Betelguese lie:
A) at the bottom left. B) at the bottom right. C) at the top left. D) at the top right. E) They can't be plotted, for they are not main sequence.
Action and reaction forces are parts of
A) a single interaction. B) a pair of interactions. C) multiple interactions.