A wire of diameter 0.20 mm stretches by 0.20% when a 6.28-N force is applied to it. What is Young's modulus for this wire?
A) 2.5 × 1010 Pa
B) 1.0 × 1011 Pa
C) 2.5 × 1012 Pa
D) 1.0 ×1012 Pa
B
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Time Dilation: A particle physicist observes cosmic rays creating a new particle high in the atmosphere, and the speed of this particle is measured at 99.7% the speed of light. It is unstable, and is observed to decay in an average 37.0 ?s. If this particle were at rest in the laboratory, what would be its average lifetime?
A. 2.9 µs B. 18 µs C. 5.3 µs D. 12 µs E. 4.3 µs
Define "intelligent civilization" according to Drake
What will be an ideal response?
Any object moving relative to Earth will have a Doppler shift when viewed from Earth
Indicate whether the statement is true or false
An electric toaster operating on 120 volts draws a current of 6 amperes. The resistance of the toaster is
a. 0.05 ohms. b. 20 ohms. c. 720 ohms. d. none of the above.