Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is and a life span of 75 years
A) 3 × 109 beats
B) 3 × 108 beats
C) 3 × 1010 beats
D) 3 × 107 beats
A
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The Great Explosion of Eta Carinae expelled about ________ solar masses of material and released about as much visible energy as a supernova
Fill in the blank(s) with correct word
A particle is moving with a constant acceleration of 4.0 m/s2. Its speed at t = 1.0 s is 4.0 m/s and at t = 3.0 s it is 12.0 m/s. What is the area under the position-time graph for the interval from t = 1.0 s to t = 3.0 s?
A. 8.0 m/s B. 8.0 m C. 12 m D. 16 m E. 16 m/s2
A mole of diatomic oxygen molecules and a mole of diatomic nitrogen molecules are at STP. Which statements are true about these molecules? (There could be more than one correct choice.)
A) Both gases have the same average molecular speeds. B) Both gases have the same number of molecules. C) Both gases have the same average kinetic energy per molecule. D) Both gases have the same average momentum per molecule.
The resistance in ohms of the heater is
a. 0.1 c. 144,000 b. 10 d. none of the above