A small airplane with a wing span of 12 m flies horizontally and due north at a speed of 60 m/s in a region where the magnetic field of the earth is 60 ?T directed 60° below the horizontal. What is the magnitude of the induced emf between the ends of the wing?
a. 50 mV
b. 31 mV
c. 37 mV
d. 44 mV
e. 22 mV
c
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What is Pluto's moon Charon thought to have in common with our own Moon?
A) It probably formed as a result of a giant impact. B) It has the same basic composition. C) It has the same approximate mass. D) It has the same average density.
Which of the following is an inert gas?
A) Hydrogen B) Helium. C) Carbon D) Oxygen
The basic energy transformation that takes place in all heat engines is
A) chemical to thermal. B) kinetic to thermal. C) chemical to electric. D) non-thermal to thermal. E) thermal to non-thermal.
Potassium Iodide (chemical formula: KI) has a face-centered cubic structure (just like sodium chloride). If the distance between crystal planes is d = 0.353 nm and X-rays of wavelength ? = 0.0934 nm are used, what is the smallest angle ? at which a diffraction maximum may be obtained?
a. 9.92° b. 7.60° c. 13.3° d. 15.5° e. 6.52°