Four identical lab carts each have a mass of 200kg. different masses are added to the carts and the velocities are measured. all carts move to the right. which cart has the greatest momentum. cart a cart b cart c cart d

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.

Abody covers a semicircle of radius 7cm in 5s .find its linear speed