A proton moving at 3 × 10^4 m/s is projected at an angle of 30° above a horizontal plane. If an electric field of 400 N/C is directed downwards, how long does it take the proton to return to the horizontal plane? (HINT: Ignore gravity.) [mProton = 1.67 × 10^-27 kg, qProton = +1.6 × 10^-19 C.]
7.8 × 10^-7 s
You might also like to view...
Draw all zones and layers of the Sun from the interior through the atmospheres and beyond, if needed
What will be an ideal response?
Graphical Analysis: Which of the following graphs represent an object at rest? (There could be more than one correct choice.)
A. graph a B. graph b C. graph c D. graph d E. graph e
Consider a high-speed bus colliding head-on with an innocent bug. The force of impact splatters the unfortunate bug over the windshield. Which is greater, the force on the bug or the force on the bus?
A. Bug B. Bus C. Both are the same. D. Cannot say
The reason the north pole of a bar magnet free to rotate points north is because
A. the south geographic pole of the earth is the earth's magnetic north pole. B. the south geographic pole of the earth is the earth's magnetic south pole. C. there is a net accumulation of negative magnetic charge at the earth's south geographic pole. D. there is a net accumulation of positive magnetic charge at the earth's north geographic pole. E. the north geographic pole of the earth is the earth's magnetic north pole.