What is the name of the nebula from which our Solar System was formed?
A. Crab nebula
B. Solar nebula
C. Orion nebula
D. Pseudo nebula
Answer: B
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An atom of sodium has an atomic number of 11 and a mass of 23 . How many neutrons does it have?
a. 11 b. 12 c. 23 d. 34 e. 35
There is observational evidence that supports the theoretical conditions of the universe. The farthest back in the history of the universe this evidence goes is:
A) the moment of the Big Bang. B) the end of the Planck epoch. C) the beginning of GUT. D) the end of the Radiation Era. E) the Recombination Epoch.
A car travels around a curve with constant speed. The correct statement from the following is
A. the car has zero acceleration. B. the car has an acceleration directed in the instantaneous direction of the velocity vector. C. the velocity of the car is constant. D. the car has an acceleration directed inward toward the center of the curve. E. the car has an acceleration directed outward from the center of the curve.
At liftoff, the engines of the Saturn V rocket consumed 12 500 kg/s of fuel and exhausted the combustion products at 2 700 m/s. What was the total upward force (thrust) provided by the engines?
a. 3.38E+7 N b. 4.63E+6 N c. 2.16E+5 N d. 3.48E+7 N e. 3.28E+7 N