Earth actually has an electric field of 1.0 x 102 N/C at its surface pointing toward the centre. (a) A uniformly charge sphere produces an electric field outside the object exactly the same as the field that would be produced if the charge is concentrated at the centre of the field. Assume Earth is uniformly charged. What is the type and magnitude of the charge on Earth? Show your work on a separate sheet of paper.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2