Pz 30 points answer only if you know
the correct expression for finding the period of a planet revolving around the sun is:

t = r^2(2π / gms)

t = r^3(4π^2 / gms)

t^2 = r^3(4π^2 / gms)

t^2 = r^3(2π / gms)

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

the device is called “ rocket engine”

the answer is kevlar