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A.) How can a spectrogrph be used to indicate that the rings of Saturn are not solid?
B.) Astronomers in the 1940's had difficulty measuring the amount of water in the Martian atmosphere spectroscopically, becuase the Earth's atmospheric water got in the way. They could not yet fly above our atmosphere. How could the spectral lines from the two planets be separated, so that accurate measurements can be made?
C.) A distant star yields a spectrum showing two sets of hydrogen spectral lines: a strong red shifted set, and a weaker blue shifted. How might you interpret this observasion?
a 42 g ice cube at its melting point is dropped into an insulated container of liquid nitrogen. how much nitrogen
An electric charge on the x-axis oscillates sinusoidally about the origin. A distant observer is located at a point on the positive z-axis. In what direction will the electric field oscillate at the observer's location
All distant galaxies are moving away from us. Describe why this does not imply that we are at the center of universe.
a telescope is constructed from two lenses with focal lengths of 90.0cmnbspand 20.0cmnbsp the 90.0?cmnbsplens being
A particle is acted on by two torques about the origin: ?1 has a magnitude of 4.5 N·m and is directed in the positive direction of the x axis, and ?2 has a magnitude of 3.2 N·m and is directed in the negative direction of the y axis. What are the mag..
1. a pulley of radius 0.3 m is rotating counter-clockwise and is pulling a weight upward. the weight slows the spinning
How long does it take for the toluene to be depleted? At 298 K, the vapor pressure and the specific gravity of toluene are 28.4 mm Hg and 0.866, respectively.
The resistance of a bagel toaster is 14 ?. To prepare a bagel, the toaster is operated for one minute from a 120-V outlet. How much energy is delivered to the toaster?
A scientist is determining the age of a rock by comparing their position to other rock layers. By doing this, the scientist is determining ____________.
What is the wavelength of the reflection minimum?
2 isolated charges +q and -2q are 2 cm apart. if F is the magnitude of the force acting on charge -2q. What are the magnitude and direction of the force acting on charge +q
a 0.135 kg projectile is fired with a velocity of 711 ms at a 1.82 kg wooden block that rests on a frictionless table.
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