Power may be expressed as _____________ times resistance
Fill in the blank(s) with correct word
I2
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Simple Harmonic Motion: A sewing machine needle moves in simple harmonic motion with a frequency of 2.5 Hz and an amplitude of 1.27 cm.(a) How long does it take the tip of the needle to move from the highest point to the lowest point in its travel?(b) How long does it take the needle tip to travel a total distance of 11.43 cm?
What will be an ideal response?
A cable is 100-m long and has a cross-sectional area of 1 mm2. A 1000-N force is applied to stretch the cable. The elastic modulus for the cable is 1.0 × 1011 N/m2. How far does it stretch?
A) 0.001 m B) 0.01 m C) 0.10 m D) 1.0 m E) 10 m
Suppose our Sun were suddenly replaced by a supergiant star. Which of the following would be true?
A) The supergiant would appear as large as the full Moon in our sky. B) Earth would fly off into interstellar space. C) The supergiant's surface temperature would be much hotter than the surface temperature of our Sun. D) Earth would be inside the supergiant.
The zonal flows giving rise to the belts and zones are similar to the jet streams in our own stratosphere
Indicate whether the statement is true or false