The apparent visual magnitude of a star is 7.3 . This tells us that the star is
a. one of the brighter stars in the sky.
b. bright enough that it would be visible even during the day.
c. not visible with the unaided eye.
d. very far from Earth.
e. very close to Earth.
c
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Capacitors of values 6.0 mF and 9.0 mF are connected in series. What is the capacitance of the combination?
A. 15 mF B. 7.5 mF C. 3.0 mF D. 3.6 mF E. 54 mF
An office building is constructed with a 6 inch space between the floor and the ceiling of the next lower floor, as shown. If air passes through the space at 65ºF determine the convective heat transfer per unit area when the floor and ceiling are 75ºF.
During the formation of the oceans, erosion of the Earth most significantly led to what?
The Hubble Law is a relation between a galaxy's
a. mass and its luminosity. b. distance and its luminosity. c. mass and its recession velocity. d. distance and its recession velocity. e. mass and its diameter.