Use coulomb's law, f=kq1q2/d2, to calculate the electric force on an electron (q=−1.6×10−19c) exerted by a single proton if the particles are 0.53×10−10m apart. the constant k in coulomb's law is 9.0×109 n⋅m2/c2. (the unit abbreviated n is the newton, the si unit of force.) express your answer using two significant figures.

How would doubling the made of an object change the objects potential energy

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above