The more massive a main-sequence star, the more ___________ it is, as found by the M-L relation
Fill in the blank(s) with correct word
luminous
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Resistors in Combination: A combination of a 2.0-? resistor in series with 4.0-? resistor is connected in parallel with a 3.0-? resistor. What is the equivalent resistance of this system?
A. 2.0 ? B. 3.0 ? C. 4.0 ? D. 9.0 ?
What are gravitational waves?
A) a type of energy that is different from light and that has been detected from sources such as merging neutron stars and black holes B) a form of light with higher energy than gamma rays C) a form of light with lower energy than radio waves D) the name we give to electromagnetic waves that come from astronomical objects that have gravity
A brass rod, 4.0 m long and with a cross sectional area of 9.2 × 10-6 m2 is subjected to a tension of 6.0 × 103 N/m2. The Young's modulus for brass is 9.0 × 1010 N/m2, and the Poisson ratio is 0.48. By how much does the volume of the rod change?
A) 6.3 × 10-7 m3 B) 0.029 m3 C) 2.7 × 10-7 m3 D) 4.0 × 10-7 m3 E) 5.2 × 10-7 m3
A rocket ship is 74.0 m in length when measured before leaving the launching pad. What would its velocity be if a ground observer measured its length as 60.0 m while it is in flight? (c = 3.00 × 10^8 m/s)
a. 1.76 × 10^8 m/s c. 1.98 × 10^8 m/s b. 0.980 × 10^8 m/s d. 1.15 × 10^8 m/s