A 600-kg geosynchronous satellite has an orbital radius of 6.6 Earth radii. What gravitational force does Earth exert on the satellite?
A. 13.8 N
B. 90.9 N
C. 138 N
D. 909 N
Answer: C. 138 N
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The lifetime of an excited nuclear state is 10-9 s. What is the minimum uncertainty in the energy of this state?
A) 1 × 10-9 eV B) 1 × 10-25 eV C) 6 × 10-25 eV D) 5 × 10-9 eV E) 7 × 10-7 eV
A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.591 nm, what is the wavelength of the scattered photon?
A) 0.380 nm B) 0 nm C) 0.550 nm D) 0.591 nm E) 0.595 nm
As water changes to ice, water molecules
A) absorb energy. B) release energy. C) retain their energy. D) lose the quality of wetness.
It is likely that both Pluto and Triton were originally ________
Fill in the blank(s) with correct word