When sound travels faster higher in the air than it does closer to the ground, sound bends
A) upward.
B) downward.
C) neither of these
Answer: B
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Which of these particles has the least mass?
a. electron neutrino b. muon c. electron d. pion
The apparent path that the Sun traces annually along the celestial sphere is known as the ______________
Fill in the blank(s) with correct word
Electric power lines require convective cooling from the surrounding air to prevent excessive temperatures in the wire. If a 1 inch diameter line is wrapped with nylon to increase heat transfer with the surroundings, how much nylon can be wrapped around the wire before it begins to act as an insulator? The convective heat transfer coefficient is 5 Btu/hr?ft^2 ?ºF.
What will be an ideal response?
The nuclear bulge of our galaxy
a. contains stars that are primarily population I stars. b. is primarily composed of gas and dust. c. contains stars primarily associated with the spherical component of our galaxy. d. contains stars primarily associated with the disk component of our galaxy. e. contains stars that are primarily population I stars, is primarily composed of gas and dust, and contains stars primarily associated with the disk component of our galaxy.