A semicircular shape has a diameter of 36” and a flat-side dimension of 68”. How many 8” radius circles can be cut from the shape?
What will be an ideal response?
ANS: 8
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What is the technician doing in this illustration?
A) Installing a pressure gauge
B) Preparing to fill the transmission
C) Adjusting a band
D) Checking the transmission fluid level
What is biological control of insect/mite pests?
What will be an ideal response?
Which cutting fluid would be be best for reaming or tapping low carbon steel?
A) Kerosene B) Lubricating oil C) Soluble oil D) Sulfurized oil
A periodic rectangular pulse train f(t) shown below has amplitude A = 1 V, pulse width ? = 0.35 ms, and period T0 = 1 ms. The pulse is centered at t = 0.
(a) Find the fundamental frequency f0 of this signal.
(b) Find the duty cycle d of this signal.
(c) Find the numerical values of a0, and an for 1 ? n ? 5.
(d) Plot the one-sided magnitude spectrum for 0 ? f ? 5f0.
(e) Plot the one-sided phase spectrum for 0 ? f ? 5f0.
(f) Find the expression of approximation ˆ( ) f t consisting of the dc component, the fundamental component, the second harmonic component, and the third harmonic component of its trigonometric Fourier series (sum of cosines). The coefficients must be numbers.
