Relative humidity is measured with a(n) ______________
Fill in the blank(s) with correct word
hygrometer
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What is the frequency of the light emitted by atomic hydrogen with m = 8 and n = 12? (The Rydberg constant is R = 1.097 × 107 m-1, c = 3.00 × 108 m/s.)
A) 2.86 × 1013 Hz B) 1.43 × 1013 Hz C) 7.46 × 1013 Hz D) 8.82 × 1013 Hz E) 1.05 × 1013 Hz
Starting with 235U, assume the following sequence of decays occur:
(1 ) alpha decay (2 ) beta minus decay (3 ) alpha decay Determine the correct isotopic product after each process has occurred sequentially.
Rotational Kinetic Energy: A uniform ball is released from rest on a no-slip surface, as shown in the figure. After reaching its lowest point, the ball begins to rise again, this time on a frictionless surface. When the ball reaches its maximum height on the frictionless surface, it is
A. higher than when it was released. B. lower than when it was released. C. at the same height from which it was released. D. It is impossible to tell without knowing the mass of the ball. E. It is impossible to tell without knowing the radius of the ball.
A polyethylene bar (E 5 1.4 GPa, ? 5 0.4) of diameter 80 mm is inserted in a steel tube of inside diameter 80.2 mm and then compressed by axial force P. The gap between steel tube and polyethylene bar will close when compressive load P is approximately:
(A) 18 kN
(B) 25 kN
(C) 44 kN
(D) 60 kN
