A rod with a diameter of 2.00 mm projects 20.0 mm horizontally outward from a wall. A 2.00 N coat is hung from the end of the rod and the rod deflects downward by 
The shear stress of the rod is
a. 
b. 
c. 
d. 
e. 
e.
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Why does the Sun's convection zone exist?
A. The rate of energy transport is too low for radiation to be efficient. B. There is too much energy passing through the region to transport by radiation. C. It serves as a way to replenish the core with hydrogen. D. The sun does not have a convection zone.
Which of the following statements about spectral types of stars is not generally true?
A) The spectral type of a star can be determined by identifying lines in its spectrum. B) The spectral type of a star can be used to determine its surface temperature. C) The spectral type of a star can be used to determine its color. D) The spectral type of a star can be used to determine its distance.
A coil to be operated in air has 200 loops in a length of 3 cm. What current is required to produce a flux density of 0.02 T?
What will be an ideal response?
A vocabulary in context exercise in which students match words to definitions describing elliptical planetary orbits, applying ideas from Kepler’s Laws of Planetary Motion
1. Earth is located at one _______ of the Moon's orbit. 2. According to Kepler's second law, Jupiter will be traveling most slowly around the Sun when at _______. 3. Earth orbits in the shape of a/an _______ around the Sun. 4. The mathematical form of Kepler's third law measures the period of years and the _______ in astronomical units (AU). 5. According to Kepler's second law, Pluto will be traveling fastest around the Sun when at _______. 6. The extent to which Mars' orbit differs from a perfect circle is called its ______.