Typically, what color is the Martian sky during in the morning and evenings?
A) green
B) yellow-brown
C) red
D) blue
D
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What makes a transition from a higher energy state to a lower energy state when aphoton is emitted by an atom?
a) electron b) proton c) photon d) graviton e) neutron
Bright and dark fringes are seen on a screen when light from a single source reaches two narrow slits a short distance apart. The number of fringes per unit length on the screen can be halved
A.
.B.
.C.
the wavelength is changed to 
.D.
E.
.If I weigh 741 N on Earth at a place where g = 9.80 m/s2 and 5320 N on the surface of another planet, what is the acceleration due to gravity on that planet?
A) 51.4 m/s2 B) 70.4 m/s2 C) 81.0 m/s2 D) 61.2 m/s2
A series circuit consists of a 50-Hz ac source, a 50-? resistor, a 0.50-H inductor, and a 60-?F capacitor. The rms current in the circuit is measured to be 3.1 A. What is the voltage amplitude of the source?
A) 220 V B) 160 V C) 510 V D) 180 V E) 270 V