Galileo believed the natural laws were best understood by _____.
A. logic
B. experiment
C. inertia
D. forces
Answer: B. experiment
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In a Newtonian fluid, the viscosity is equal to
(a) The applied shear stress divided by the shear strain. (b) The applied shear stress times the shear strain rate. (c) The shear strain rate divided by the applied shear stress. (d) The applied shear stress divided by the shear strain rate.
One time constant after an RL circuit has its switch closed, how does the current I in it compare to the maximum current Imax that occurs for this circuit?
a. I > Imax/2 b. I = Imax/2 c. I < Imax/2 d. Without knowing R and L, this cannot be determined.
A 100-kg box is placed on a ramp. As one end of the ramp is raised, the box begins to move downward just as the angle of inclination reaches 25°. What is the coefficient of static friction between box and ramp?
a. 0.15 c. 0.47 b. 0.27 d. 0.95
As frequency is varied in an RLC series circuit, resonance is reached when
A. the voltages VR, VL and VC all become equal. B. the voltages VL and VC become zero. C. the voltage VR becomes equal to the source voltage. D. None of the choices are correct.