Spectrographic analysis of light from a distant galaxy shows that the galaxy is receding from Earth at v = 0.384 c. Use Hubble's law with H = 17 km/s/106 lightyears to estimate the distance to the galaxy
a. 3.3 × 10^8 lightyears
b. 6.8 × 10^9 lightyears
c. 9.9 × 10^8 lightyears
d. 2.2 × 10^9 lightyears
e. 6.5 × 10^6 lightyears
b
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If you lived on the Moon how often would the Earth set below your horizon?
a. Every 24 hours b. Once a sidereal period (27.3 days) c. Once a synodic period (29.5 days) d. Every year e. Never
Globular clusters are primarily found in the ____________________ component of the Galaxy
Fill in the blank(s) with correct word
A proton moves around a circular path (radius = 2.0 mm) in a uniform 0.25-T magnetic field. What total distance does this proton travel during a 1.0-s time interval? (m = 1.67 × 10?27 kg, q = 1.6 × 10?19 C)
A. 82 km B. 59 km C. 71 km D. 48 km E. 7.5 km
According to Heisenberg, as the uncertainty in the measurement of a particle's momentum is increased by a factor of 2, by what factor is the uncertainty in that particle's position changed?
a. 1 c. 1/2 b. 4 d. 2