A engine goes through a cyclic process. During the cyclic process the engine takes in 3200 J of heat and has a heat output of 2400 J. What is the efficiency of the engine?
A. 10%
B. 15%
C. 25%
D. 40%
E. 52%
C. 25%
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Of all the galaxies, _____ are easiest to notice
A) elliptical galaxies B) spiral galaxies C) lenticular galaxies D) dwarf spheroidal galaxies
Which moon of the Jovian planets has a thick, hazy atmosphere?
a. Io b. Triton c. Europa d. Titan
The y-component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation
Ey = (375 N/C) cos[kx - (2.20 × 1014 rad/s)t]. (c = 3.0 × 108 m/s) (a) What is the largest that the x-component of the wave can be? (b) What is the largest that the z-component of the wave can be?
A harmonic longitudinal wave propagating down a tube filled with a compressible gas has the form s(x, t) = smcos(kx ? ?t). Its velocity can be obtained from
a. ?/k b. k/? c. k d. ? e. ?k