A brass cube, 10 cm on a side, is raised in temperature by 150°C. The coefficient of volume expansion of brass is 57 × 10^-6/°C. By what percentage is any one of the 10-cm edges increased in length?
a. 4%
c. 0.38%
b. 2.8%
d. 0.29%
D
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How much stronger is the gravitational pull of the Sun on Earth, at 1 AU, than it is on Saturn at 10 AU?
A) 5X B) 10X C) 25X D) 100X E) 250X
Consider an RLC circuit. The impedance of the circuit increases if XL increases
A) always true B) never true C) true only if XL is greater than or equal to XC D) true only if XL is less than or equal to XC
A thin ribbon of a silver alloy 2.00-cm wide and 0.015 0-mm thick carries a current of 6.98 A perpendicular to a magnetic field. The Hall voltage is found to be 1.24 × 10^?4 V when the magnetic field is 2.50 T. Calculate n, the number of charge carriers per cubic meter
The Declaration of Principles Concerning Activities Following the Detection of Extraterrestrial Intelligence states that the first thing to do after the detection of a possible signal is to
A) send a reply B) announce the discovery to the public C) confirm that it is genuine D) classify it top secret