A pendulum swings through 10 cycles in 2 seconds. The frequency of the pendulum is
A. 5 Hz.
B. 10 Hz.
C. 0.1 Hz.
D. 0.5 Hz.
E. 2 Hz.
Answer: A
You might also like to view...
A one pound (lbm) square of butter, 2.5 in by 2.5 in by 5 in at 50ºF is placed in a freezer at 28ºF as shown in the figure. If h is 10 Btu/hr?ft^2? ºF, the thermal conductivity is 0.114 Btu/hr?ft?ºF, specific heat is 0.52 Btu/lbm?ºF, and density is 56 lbm/ft^3, determine the time for the center to reach 35ºF.
Which of the following features of a telescope determines its light gathering power?
a. The focal length of the objective b. The focal length of the eyepiece c. The diameter of the objective d. Length of the telescope tube e. None of the above.
What is being shown in the zoom-out box of this painting?
A) the formation of a jovian planet B) the solar nebula C) the formation of a terrestrial planet D) the formation of Saturn's rings
If the z-component of the magnetic field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Bz(x, t) = (1.25 ?T) cos[(3800 m-1)x - (1.14 × 10-12 rad/s)t],
what is the largest that the y component of the electric field can be? (c = 3.0 × 108 m/s) A) 375 N/C B) 4.17 × 10-15 N/C C) 3.75 × 108 N/C D) 4.17 × 10-9 N/C E) 1.25 × 106 N/C