An electron is moving at
m/s at an angle of 40
to a 0.80 T magnetic field. What is the magnitude of the acceleration of the electron?
A. 
B. 
C. 
D. 
E. 
A.
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A resistor of unknown resistance and a 15-? resistor are connected across a 20-V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance?
A. 75 ? B. 12 ? C. 7.5 ? D. 30 ? E. 5.0 ?
The dark bands in the interference pattern in Young's double slit experiment are created by
A. Light from the window B. Constructive interference C. Destructive interference D. Physicists still aren't sure.
The spectrum of a(n) ____________________ consists of a continuous spectrum and a few highly redshifted emission lines of due to hydrogen
Fill in the blank(s) with correct word
What was there just after the Big Bang?
A) nothing B) the primeval fireball C) a singularity D) a black hole E) everything was inside Earth