On the autumnal equinox the sun is
a. north of the celestial equator.
b. south of the celestial equator.
c. on the celestial equator and moving north with respect to the equator.
d. on the celestial equator and moving south with respect to the equator.
e. closest to the north celestial pole.
D
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A circular window in the wall of a home has a diameter of 25 cm and is made of a single pane of glass 0.30 cm thick. Thermal conductivity for the glass is 0.63 W/mK. What heat is lost through the window in 12s if the temperature inside the house is
and outside is
A. 16 kJ B. 4.0 kJ C. 1.6 kJ D. 1.3 kJ E. 5.0 kJ
What is the approximate range in latitude over which sunspots appear?
What will be an ideal response?
A spherical conductor (radius = 1.0 cm) with a charge of 2.0 pC is within a concentric hollow spherical conductor (inner radius = 3.0 cm, outer radius = 4.0 cm) which has a total charge of ?3.0 pC. What is the magnitude of the electric field 2.0 cm from the center of these conductors?
a. 23 N/C b. zero c. 45 N/C d. 90 N/C e. 110 N/C
A particle with charge -40.0 nC is on the x axis at the point with coordinate x = 0. A second particle, with charge -20.0 nC, is on the x axis at x = 0.500 m. Is there a point at a finite distance where the electric field is zero?
1.Yes; it is to the left of x = 0. 2.Yes; it is between x = 0 and x = 0.500 m. 3.Yes; it is to the right of x = 0.500 m. 4.No.