If you are in the Earth's umbra on the Earth's surface, then
A) the Moon is always visible.
B) it must be a lunar eclipse of some type.
C) it must be a total solar eclipse.
D) it is night time.
E) the Sun is always visible.
D
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The period of oscillation of a near-Earth satellite (neglecting atmospheric effects) is 84.3 min. What is the period of a near-Moon satellite? (R?= 6.37 × 10^6 m; RMoon= 1.74 × 10^6 m; m? = 5.98 × 10^24 kg; mMoon = 7.36 × 10^22 kg.)
a. 6.03 × 10^?3 min. b. 0.713 min. c. 84.3 min. d. 108 min. e. 140 min.
An electron is in an infinite square well (a box) that is 2.0 nm wide
The electron makes a transition from the n = 8 to the n = 7 state, what is the wavelength of the emitted photon?(h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19) A) 880 nm B) 750 nm C) 610 nm D) 1000 nm E) 1100 nm
Find the pressure in atmospheres in the water at the base of Dworshak Dam if the water in the reservoir is 200 meters deep. (1.01 × 10^5 N/m2 = 1 ATM.)
a. 20.4 ATM b. 24.7 ATM c. 29.4 ATM d. 194 ATM e. 75 ATM
An incompressible fluid is flowing through a horizontal pipe with a constriction. The velocity of the fluid in the wide section of the pipe is 5.00 m/s and the velocity of the fluid in the narrow section of pipe is 8.00 m/s. The pressure of the fluid in the wide section is 200 kPa. What is the pressure in the narrow section of the pipe? (density of the fluid is 
A. 155 kPa B. 160 kPa C. 175 kPa D. 187 kPa E. 207 kPa