Here, you need to apply second equation of Kinematics
S = ut + 1/2 at²
s = at²/2 [ As initial velocity (u) = 0 ]
Now, a = 9.8 m/s²
t = 2.7 s
Substitute their values in the formula:
s = 9.8 × (2.7)² / 2
s = 35.721 m
After rounding-off to the nearest hundredth value, it would be 36 m
Finally, your answer would be option B.
Hope this helps!
The correct answer is:
<span>A. electron attraction between electron and nucleus = centripetal force of the orbiting electron
In fact, Bohr model depicts the atom as a nucleus surrounded by electrons in circular orbit around it, similar to the planets around the Sun. The centripetal force that keeps the electrons in circular motion around the nucles is provided by the electrostatic force between the electrons and the nucleus, so option A is the correct one.</span>
<span>If
a contour interval of a topographic map is 50 feet, there would be 3
contour lines drawn between sea level and an elevation of 175 feet.</span>
