The acceleration due to gravity on the surface of Earth is g. Calling R the radius of Earth, at what distance from Earth's center would the acceleration due to gravity drop to g/16?
A) 16 R
B) R/16
C) R/4
D) 4 R
E) 2 R
D
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Carbon dioxide is stored in four containers at different temperatures. Container 1 contains the gas at 200 degrees Celsius, Container 2 contains the gas at 300 degrees Celsius, Container 3 contains the gas at 400 degrees Celsius, and Container 4 contains the gas at 500 degrees Celsius. Which of the following containers contains the gas with the lowest opacity?
A) Container 1 B) Container 2 C) Container 3 D) Container 4
Ptolemy's model of the universe
a. was heliocentric. b. included elliptical orbits. c. contained epicycles. d. all of the above e. none of the above
An astronaut is in an all-metal chamber outside the space station when a solar storm results in the deposit of a large positive charge on the station. Which statement is correct?
A. The astronaut must abandon the chamber immediately to avoid being electrocuted. B. The astronaut will be safe only if she is wearing a spacesuit made of non-conducting materials. C. The astronaut does not need to worry: the charge will remain on the outside surface. D. The astronaut must abandon the chamber if the electric field on the outside surface becomes greater than the breakdown field of air. E. The astronaut must abandon the chamber immediately because the electric field inside the chamber is non-uniform.
A single thin slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum. If monochromatic light of 530.0-nm wavelength is used for the illumination, what is the width of the slit?
A) 825 nm B) 791 nm C) 757 nm D) 723 nm E) 689 nm