Angular momentum is conserved for a satellite in
A) circular orbit.
B) elliptical orbit.
C) both of these
D) neither of these
Answer: C
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Stars with masses greater than 1.1 solar masses use the ____________________ to convert hydrogen into helium and produce energy
Fill in the blank(s) with correct word
A photon of initial wavelength 0.651 nm, after being scattered from a free electron at rest, moves off at an angle of 120° with respect to its incident direction
(mel = 9.11 × 10-31 kg, h = 6.626 × 10-34 J ? s, c = 3.00 × 108 m/s) (a) What is the wavelength of the scattered photon? (b) What is the energy of the scattered photon?
An eroded surface of metamorphic rocks on which a horizontal bed rests is called a
A) strata. B) dike. C) nonuniform surface. D) nonconformity.
The Permian period experienced major extinctions, which may have been due to
A) global warming. B) the emergence of the reptile. C) the breakup of Pangaea. D) the formation of Pangaea.