An astronaut lands on a previously unknown planet of radius 2350. km and she measures the acceleration of gravity to be 3.20 m/s2
(a) What is the mass of this new planet?
(b) What does the astronaut weigh on this new planet if she weighs 384. N on Earth?
(a) 0.26 × 1024 kg
(b) 125. Newtons
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The lower limit for a main sequence star is _______________ solar masses
Fill in the blank(s) with correct word
How many time constants must elapse if an initially charged capacitor is to discharge 55% of its stored energy through a resistor?
A. 0.60 B. 0.46 C. 0.52 D. 0.40 E. 1.1
Two harmonic waves are described by 
From the choices given, determine the smallest positive value of x (in cm) corresponding to a node of the resultant standing wave.
A. 3 B. 0.25 C. 0 D. 6 E. 1.5
A satellite orbits the earth at an unchanging speed of 18,000 mph. This satellite
A) is accelerated. B) has a changing velocity. C) Both of the above. D) None of the above.