What would be the acceleration of gravity of a planet with four times the mass of earth but twice the radius?

-- Multiplying the mass by  4  multiplies the acceleration of gravity by  4 .

-- Doubling the radius multiplies the acceleration of gravity by (1/2²) = 1/4 .

-- Doing both multiplies the acceleration of gravity by  (4 / 4)  =  1 .

It doesn't change.  The acceleration of gravity on that planet
would be the same as it is on Earth.

Answer: 1.4 seconds which is the third optionexplanation: current is defined as the flow of charge per timetherefore, the equation that relates current, charge and time can be expressed as follows: i = δq / δtwhere: i is the current given = 1.8 ampereδq is the charge given = 2.5 coulombδt is the time required for the flow of the given charges to give the 1.8 ampere.substitute with the givens in the above equation to get the time as follows: 1.8 = 2.5 / δtδt = 2.5 / 1.8 = 1.38888 which is approximately 1.4 secondshope this was !