A decoration, of mass M, is suspended by a string from the ceiling inside an elevator. The elevator is traveling UPWARD with a constant speed. The tension in the string is
A) greater than Mg.
B) less than Mg.
C) equal to Mg.
D) impossible to tell without knowing the speed.
E) impossible to tell without knowing the decoration mass.
C
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2.00 moles of an ideal gas is at a pressure of 1.50 atmospheres and a volume of 0.00100 m3. What is the total kinetic energy of the gas?
A. 175 J B. 228 J C. 267 J D. 303 J E. 367 J
The bond between carbon atoms in the molecule ethane, H3C—CH3 is referred to as
A) a triple bond B) an ionic bond C) a single bond D) a double bond
Planet W-70 has a radius of 2.48 × 107 m and an escape velocity of 23,300 m/s. What is the mass of W-70? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 1.01 × 1026 kg B) 2.02 × 1026 kg C) 3.03 × 1026 kg D) 4.04 × 1026 kg E) 5.05 × 1026 kg
The object above a valley floor that consists of glacial ice is called
a. a valley glacier. b. a gulley glacier c. a canyon glacier. d. none of these.