A tennis ball bounces on the floor three times, and each time it loses 23.0% of its energy due to heating. How high does it bounce after the third time, if we released it from the floor?
A) 180 cm
B) 18 cm
C) 180 mm
D) 240 cm
A
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A satellite that is in a circular orbit 230 km above the surface of the planet Zeeman-474 has an orbital period of 89 min. The radius of Zeeman-474 is 6.38 × 106 m. What is the mass of this planet? (G = 6.67 × 10-11 N ? m2/kg2)
A) 5.0 × 1024 kg B) 5.5 × 1024 kg C) 6.0 × 1024 kg D) 6.5 × 1024 kg
Light having a frequency in vacuum of 6.0 × 1014 Hz enters a liquid of refractive index 2.0. What is the frequency of the light in this liquid? (c = 3.0 × 108 m/s)
A) 12 × 1014 Hz B) 6.0 × 1014 Hz C) 3.0 × 1014 Hz D) 1.5 × 1014 Hz E) 2.0 × 1014 Hz
A transverse periodic wave is represented by the equation y(z, t) = 2.0 cm sin(1,200 rad/s t - 20.0
z). Another transverse wave is represented by the equation y(z, t) = 2.0cm sin(1,200 rad/s t + 20.0
z). What is the equation that represents the superposition of the two waves?
A. y(z, t) = 4.0 cm sin(1,200 rad/s t - 20.0 
z)
B. y(x, t) = 4.0 cm sin(1,200 rad/s t) cos(20.0x)
C. y(x, t) = +4.0 cm cos(1,200 rad/s) sin(20.0
x)
D. y(x, t) = +4.0 cm cos(1,200 rad/s) + (20.0x)
226 88Ra decays by alpha decay. What are A and Z for the daughter nuclide?
A. 226, 92 B. 222, 92 C. 226, 88 D. 222, 88 E. 222, 86