Express 50 mi/h in units of meters per second. (1 mi = 1609 m)
A) 49 m/s
B) 2.2 m/s
C) 22 m/s
D) 45 m/s
C
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Microwaves have ________ wavelengths and ________ energies compared to the visual band
a. shorter, higher b. longer, lower c. shorter, lower d. longer, higher
Which statement about Jupiter is true?
A. It is more massive than all other planets combined. B. It may become a star in about a billion years. C. It is the least dense of the Giant Planets. D. It has a solid core of ice about 1,000 km under the visible surface.
While a car travels around a circular track at constant speed, its
A) acceleration is zero. B) velocity is zero. C) both of these D) none of the above
When material expanding away from a star in a binary system leaves a star’s Roche lobe,
a. the material will start to fall back toward the star.
b. all of the material will accrete on to the companion.
c. the material is no longer gravitationally bound to that star.
d. the material will increase in temperature an eventually undergo thermonuclear fusion.
e. c and d.