An electron is moving atm/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.

Physics & Space Science

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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 ?

Physics & Space Science

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.

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science