Mean Life: Isotope A has a decay constant of 0.861 s-1 and isotope B has a decay constant of 0.627 s-1. Which isotope has a longer mean life (time constant)?
A. isotope A
B. isotope B
Answer: B
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A 1200 kg car is moving at 5.0 m/s EAST. It strikes an 1800 kg car at rest. The cars have an elastic collision and move in the EAST or WEST direction. The velocity of the 1200 kg car after the collision is
A. 4.0 m /s EAST. B. 1.0 m/s EAST. C. 4.0 m/s WEST. D. 1.0 m/s WEST. E. 3.00 m/s EAST.
Determine ? when I = 0.50 A and R = 12 ?.
A. 12 V B. 24 V C. 30 V D. 15 V E. 6.0 V
A fountain sends water to a height of 100 meters. What must be the pressurization (above atmospheric) of the water system? 1 atm= 1.01 × 10^5 N/m2
a. 1.0 atm b. 4.2 atm c. 7.2 atm d. 9.7 atm e. 8.2 atm
An LRC series circuit consists of an 85.0-? resistor, a 14.0-?F capacitor, a 1.50-mH inductor, and a variable frequency ac source of voltage amplitude 13.25 V
At what angular frequency will the inductive reactance be 4.00 times as large as the capacitive reactance? A) 6.90 × 103 rad/s B) 3.45 × 104 rad/s C) 2.20 × 104 rad/s D) 1.10 × 104 rad/s E) 1.38 × 104 rad/s