Left undisturbed, the footprints left on the Moon by the Apollo astronauts will likely
A) already have been erased by erosion.
B) remain visible for a few more decades.
C) remain visible for millions of years.
D) remain permanently visible on the Moon.
C) remain visible for millions of years.
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Of the mass ranges below, which represents the most common stars?
A) 0.08 to 0.5 MSun B) 0.5 to 2 MSun C) 2 to 10 MSun D) 10 to 150 MSun
The angular velocity of a 755-g wheel 15.0 cm in diameter is given by the equation
?(t) = (2.00 rad/s2 )t + (1.00 rad/s4 )t3. (a) Through how many radians does the wheel turn during the first 2.00 s of its motion? (b) What is the angular acceleration (in rad/s2 ) of the wheel at the end of the first 2.00 s of its motion?
A(n) ____________________ is a rapidly spinning neutron star that accelerates charged particles near the poles of its magnetic field
Fill in the blank(s) with correct word
A glass flask has a volume of 500 mL at a temperature of 20° C. The flask contains 492 mL of mercury at an equilibrium temperature of 20°C. The temperature is raised until the mercury reaches the 500 mL reference mark
At what temperature does this occur? The coefficients of volume expansion of mercury and glass are 18 ×10-5 K-1 (mercury) and 2.0 ×10-5 K-1 (glass). A) 120°C B) 140°C C) 110°C D) 130°C E) 100°C