A 1.15-kg beaker (including its contents) is placed on a vertical spring scale. When the system is sent into vertical vibrations,
it obeys the equation y = (2.3 cm)cos(17.4 s-1 t). What is the spring constant of the spring scale, assuming it to be ideal?
348 N/m
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A charge Q is uniformly distributed along the x axis from x = a to x = b. If Q = 45 nC, a = ?3.0 m, and b = 2.0 m, what is the electric potential (relative to zero at infinity) at the point, x = 8.0 m, on the x axis?
A. 71 V B. 60 V C. 49 V D. 82 V E. 150 V
What type of seismic wave causes the most
property damage? a) a surface wave b) a body wave c) a transform wave d) a P wave
Robert Koch's contribution was
What will be an ideal response?
For general projectile motion if we neglect air, the horizontal component of a projectile's acceleration
A) is always zero. B) remains a non-zero constant. C) continuously increases. D) continuously decreases. E) first decreases and then increases.