Just before the Sun produces a planetary nebula, what will its approximate luminosity be?
What will be an ideal response?
Approximately 104 LSun
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The cores of the Moon and Mercury are similar in that
A) both cores are more iron rich than the rest of the body and the core is solid throughout. B) both cores are large in proportion to the object with a solid inner core and fluid outer core. C) both cores are more iron rich than the rest of the body, with a solid inner core and fluid outer core. D) both cores are small in proportion to the object, with a fluid inner core and solid outer core.
What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) if the film is 214 nm thick?
a. 417 nm b. 446 nm c. 406 nm d. 489 nm e. 479 nm
Three 5.0-kg masses are located at points in the xy plane, as shown. What is the magnitude of the resultant force (caused by the other two masses) on the mass at x = 0, y = 0.30 m?
a.
2.6 × 10?8 N
b.
2.0 × 10?8 N
c.
2.9 × 10?8 N
d.
2.3 × 10?8 N
e.
2.1 × 10?8 N
A mass of 0.150 kg is attached to a spring with a force constant of 3.58 N/m and undergoes simple harmonic oscillations with an amplitude of 7.50 cm. What is the total mechanical energy of the system?
A) 0.0201 J B) 0.0101 J C) 0.269 J D) 0.134 J E) 0 J