Objects one and to attract each other with an electrostatic force of 36 units if the charge of object one is halved then the new electrostatic force will be

The new electrostatic force will be half the initial force.

Explanation:

Let is call the charges of the two objects and , if the separation between them is , then the electrostatic force between them will be

where is the coulomb's constant.

If let's say the charge is halved, then it becomes  . The electrostatic force then becomes

Thus, the new electrostatic force will be half the initial force.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .