If an astronaut in full gear has a weight of 1200 N on Earth, how much will the astronaut weigh on the Moon?
A. 20 N
B. 120 N
C. 200 N
D. 720 N
Ans: C. 200 N
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The ozone layer protects us from
A. gamma rays. B. cosmic rays. C. infrared radiation. D. ultraviolet radiation.
What are the 5 main properties of stars?
A: Mass, Temperature, Size, Luminosity, Age on Main Sequence B: Distance, Parallax, Brightness, Luminosity, Size C: Radial Velocity, Transits, Microlensing, Astrometry, Direct Imaging D: Mass, Distance, Size, Parallax, Brightness E: Color, Temperature, Spectral Type, Peak Wavelength, Absorption Lines
The greatest variation in size, mass, and luminosity occurs in:
A) globular clusters. B) elliptical galaxies. C) spiral and barred spiral galaxies. D) type I vs. type II irregulars. E) Seyfert galaxies.
A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?
a. Bx is positive. b. Bz is positive. c. By is negative. d. By is positive. e. Bx is negative.