Dimensional Analysis: The speed v of an object falling with a constant acceleration g can be expressed in terms of g and the distance traveled from the point of release, h, as v = agbhc, where a, b, and c, are dimensionless constants. What must be the values of b and c?
Fill in the blank(s) with the appropriate word(s).
b = 1/2, c = 1/2
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A mass m is attached to a vertical spring with a force constant k, it oscillates with a period T. If the spring is cut to one third of its original length and the same mass is attached to it, the new period of oscillation will be
A) less than T. B) greater than T. C) equal to T. D) It could be greater or less than T, depending on how you cut the spring.
According to Heisenberg, as the uncertainty in the measurement of a particle's momentum is reduced by a factor of 2, by what factor is the uncertainty in that same particle's position changed?
a. 1/2 b. 1 c. 2 d. 4
As the angle of incidence is increased for a ray incident on a reflecting surface, the angle between the incident and reflected rays ultimately approaches what value?
a. zero b. 45° c. 90° d. 180°
A 1500-kg car accelerates from rest to 25 m/s in 7.0 s. What is the average power delivered by the engine? (1 hp = 746 W)
A) 60 hp B) 70 hp C) 80 hp D) 90 hp