LIGO can detect strong gravitational waves as they pass by because they cause the L-shaped arms of the detector to
A) contract and expand by different amounts.
B) become alternately more and less massive.
C) experience gravitational time dilation.
D) vibrate enough so that the vibrations can be measured with a seismograph.
A) contract and expand by different amounts.
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A solid steel column is 4.0 m long and 0.20 m in diameter. Young's modulus for this steel is 2.0 × 1011 N/m2. By what distance does the column shrink when a 5000-kg truck is supported by it?
A) 3.2 × 10-6 m B) 8.0 × 10-7 m C) 3.1 × 10-5 m D) 7.8 × 10-6 m
An electromagnetic wave with a peak magnetic field component of 1.59 × 10^?7 T has an associated peak electric field component of what value? (?0 = 4? × 10^?7 T?m/A, ?0 = 8.85 × 10^?12 C2/N?m2 and c = 3.00 × 10^8 m/s)
a. 2.10E–2 N/C b. 5.30E–9 N/C c. 4.77E+1 N/C d. 1.89E+8 N/C e. 5.99E–6 N/C
One star has a surface temperature of 6000 K and another has a surface temperature of 7000 K. If the two stars have the same absolute luminosity, which star has the largest radius?
A) the star at 6000 K B) the star at 7000 K C) The two stars have the same radius. D) Not enough information is given to determine.
A radio wave transmits 4.8 W/m2 average power per unit area. What is the peak value of the associated magnetic field? (m0 = 4p × 10^-7 T×m/A and c = 3.00 × 10^8 m/s)
a. 1.0 × 10^-7 T c. 2.0 × 10^–7 T b. 8.4 × 10^-3 T d. 30 T