A surface is coated with a material having index of refraction 1.50 . If light in air has a wavelength of 450 nm and is normally incident on this surface, and it is found through interference effects with this light that the surface is 15 wavelengths thick, which of the following is the thickness of the surface?
a. 6.8 mm
c. 3.0 mm
b. 1.5 mm
d. 4.5 mm
D
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The amplitude of a 3.00-kg object in simple harmonic motion is 6.00 m. The maximum acceleration of the object is 5.00 m/s2. What is the period of simple harmonic motion?
A) 6.88 s B) 1.20 s C) 0.278 s D) 0.833 s E) 7.54 s
That the Moon has no magnetic field implies that
a. the Moon is spinning too slowly to produce a magnetic field. b. the interior of the Moon is too hot to produce a magnetic field. c. the crust of the Moon is so thick that the magnetic field cannot get out of the interior. d. the Moon's core contains little if any molten iron. e. the Moon is moving further from Earth.
If a million asteroids 1-kilometer across were all combined into one object, how big would it be across? (Hint: You can assume that both asteroids and the final object are spherical. The equation for the volume of a sphere is 43?r3 where r is the radius.)
If a million asteroids 1-kilometer across were all combined into one object, how big would it be across? (Hint: You can assume that both asteroids and the final object are spherical. The equation for the volume of a sphere is 43?r3 where r is the radius.)
In the diagram below, what is the diameter of Jupiter?
a. about 7.0 x 104 km
b. about 7.0 x 105 km
c. about 1.4 x 104 km
d. about 1.4 x 105 km
e. about 3.5 x 106 km