Red dwarf stars (stars between 0.08 and 0.5 solar masses) evolve very differently than other stars as they age because ____
a. they are formed from pure hydrogen
b. they never reach the minimum temperature required to fuse carbon
c. they never form white dwarf as remnants
d. they are always part of a close binary system
e. their interiors are well mixed, through strong convection
e
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The best electrically conducting elements are located ________ in the periodic table.
A. in the last two columns B. on the left side or in the transition regions C. in the middle columns D. in the first two rows E. randomly
An electron has a speed of 0.643c. Through what potential difference would the electron need to be accelerated (starting from rest) in order to reach this speed? (c = 3.00 × 108 m/s, e = 1.60 × 10-19 C, mel = 9.11 × 10-31 kg)
A) 160 kV B) 200 kV C) 130 kV D) 180 kV
Car A is traveling at twice the speed of car B. They both hit the brakes at the same time and undergo identical decelerations. How does the distance required for car A to stop compare with that for car B?
What will be an ideal response?
On the HR diagram below, indicate the location of the white dwarf stars