When the Sun moves off the main sequence, it will initially become a red supergiant
a. True
b. False
Indicate whether the statement is true or false
True
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Thin Films: A soap bubble has an index of refraction of 1.33. What minimum thickness of this bubble will ensure maximum reflectance of normally-incident light having a wavelength of 530 nm?
A. 24.9 nm B. 76.9 nm C. 99.6 nm D. 199 nm E. 398 nm
Planet Z-34 has a mass equal to one-third that of Earth and a radius equal to one-third that of Earth. With g representing, as usual, the acceleration due to gravity on the surface of Earth, the acceleration due to gravity on the surface of Z-34 is
A) g/3. B) 3 g. C) 6 g. D) g/9. E) 9 g.
An object of mass 6 kg has a speed of 4 m/s and moves a distance of 2 m. What is its kinetic energy in joules?
a. 48 J b. 24 J c. 17 J d. 12 J
The value of the momentum of a system is the same at a later time as at an earlier time if there are no
A. collisions between particles within the system. B. inelastic collisions between particles within the system. C. changes of momentum of individual particles within the system. D. internal forces acting between particles within the system. E. external forces acting on particles of the system.