The device that spreads light into its component colors in a spectroscope is a
A) prism.
B) diffraction grating.
C) either of these
D) neither of these
Answer: C
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Three small objects are positioned as follows: the 2.0-kg object at (0.0 m, 0.0 m), the 2.0-kg object at (2.0 m, 0.0 m), and the 4.0-kg object at (2.0 m, 1.0 m). Determine the coordinates of the center of mass of this system
A) (0.50 m, 1.5 m) B) (1.5 m, 0.50 m) C) (2.5 m, 1.5 m) D) (2.5 m, 0.50 m)
During an isothermal process, 5.0 J of heat is removed from an ideal gas. What is the change in internal (thermal) energy of the gas?
A) 2.5 J B) 5.0 J C) 7.5 J D) 10 J E) 0.00 J
Entropy: What is the entropy change of 450 g of water when it changes from (a) liquid to steam at its usual boiling point and (b) ice to liquid at its usual melting point? For water, LF = 0.334 MJ/kg, LV = 2.26 MJ/kg.
What will be an ideal response?
In the Milankovitch theory, the elliptical shape of the Earth's orbit, its axis tilt, and axis precession vary with time. These combined at times to create ____ on Earth
a. day and night b. seasonal temperature variations c. daily temperature variations d. ice ages e. the constellations