Object A (mA = 1.0 kg) hangs at rest from an ideal string A connected to the ceiling. Object B (mB = 2.0 kg) hangs at rest from an ideal string B connected to object A. The tension on string A is
A. Twice the tension on string B
B. 1.5 times the tension on string B
C. Equal to the tension on string B
D. 
the tension on string B
E. Other (specify)
B. 1.5 times the tension on string B
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What is the difference in wavelength for spectral lines emitted by hydrogen for transitions from the n = 16 level to the n = 2 level and transitions from the n = 15 level to the n = 2 level? (RH = 1.097 × 10^7 m-1.)
a. 1.0 × 10^-10 m b. 2.0 × 10^-10 m c. 4.1 × 10^-10 m d. 8.1 × 10^-10 m e. 1.6 × 10^-9 m
Estimation: Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is 69 beats/min and a life span of 75 years.
A. 3 × 109 beats B. 3 × 108 beats C. 3 × 1010 beats D. 3 × 107 beats
Matter falling onto a compact object, such as a neutron star or black hole,forms a(n):
a. accretion disk b. binary star c. gamma-ray burst d. pulsar e. magnetar
Simple Harmonic Motion: A 0.25 kg harmonic oscillator has a total mechanical energy of 4.1 J. If the oscillation amplitude is 20.0 cm, what is the oscillation frequency?
A. 4.6 Hz B. 1.4 Hz C. 2.3 Hz D. 3.2 Hz