Wall posters are usually sold curled up in cylindrical cardboard tubes. If the length of the tube is 84.5 cm, and the inside diameter of the tube is 2
40 cm, what is the area of the poster expressed to the correct number of significant figures? (Assume the poster is just as long as the tube and does not overlap itself.) A) 202.8 cm2
B) 637.1 cm2
C) 203 cm2
D) 319 cm2
E) 637 cm2
E
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Which moon of the Jovian planets has a thick, hazy atmosphere?
a. Io b. Triton c. Europa d. Titan
A square loop (L = 0.20 m) consists of 50 closely wrapped turns, each carrying a current of 0.50 A. The loop is oriented as shown in a uniform magnetic field of 0.40 T directed in the positive y direction. What is the magnitude of the torque on the loop?
A. 0.21 N ? m B. 0.20 N ? m C. 0.35 N ? m D. 0.12 N ? m E. 1.73 N ? m
In Jules Verne's From the Earth to the Moon, scientists are launched from the surface of Earth by a cannon
With what speed would their capsule have to leave the cannon if the speed of the capsule is required to be zero m/s at the point between Earth and the Moon where their gravitational pulls on the capsule are equal? The mass of Earth is 5.97 × 1024 kg, the mass of the Moon is 7.35 × 1022 kg, the distance between Earth and the Moon is 3.84 × 108 m, the radius of Earth is 6.37 × 106 m, and G = 6.67 x 10-11 N•m2/kg2. A) 11,100 m/s B) 11,200 m/s C) 10,400 m/s D) 15,700 m/s E) 15,800 m/s
At what temperature would the root mean square speed of oxygen molecules, O2, be if oxygen behaves like an ideal gas? The mass of one O2 molecule is 5.312 × 10-26 kg, and the Boltzmann constant is 1.38 × 10-23 J/K
A) 0.251 K B) 2090 K C) 6270 K D) 1.52 × 1023 K