two spheres are cut from a certain uniform rock. One has a radius of 4.50m. the mass of the other is five times greater. Find it's radius​

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

no simpler subs form complex ones. synthesise = make

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

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