Calculate the radius in nanometers of the orbit of a hydrogen atom's electron with n = 5
a. 0.27
b. 2.7
c. 1.3
d. 0.13
c
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Determine the absorptivity of radiation through a 5 foot wide plume of exhaust gases at 180ºF and 1 atmosphere pressure. The gases are a mixture of air with relative humidity of 15% and carbon dioxide having mole fraction of 20%.
What will be an ideal response?
An electron has the same de Broglie wavelength as a 1.8 eV photon. The speed of the electron is closest to:
A) 1,100 m/s B) 980 m/s C) 910 m/s D) 840 m/s E) 770 m/s
An object that is negatively charged will
a. repel a rubber rod stroked with fur. b. repel a glass rod stroked with silk. c. be polarized. d. none of these
In a lab experiment, a student brings up the rotational speed of a rotational motion apparatus to 30.0 rpm. She then allows the apparatus to slow down on its own, and counts 240 revolutions before the apparatus comes to a stop
The moment of inertia of the flywheel is 0.0850 kg?m2. What is the retarding torque on the flywheel? A) 0.0425 Nm B) 0.159 Nm C) 0.0787Nm D) 0.000278 Nm E) 0.0000136 Nm