Some help me on this please What can be said for certain about the affect of an external net force on
an object? *

A. It changes the object's mass.

B. It changes the object's kinetic energy.

C. It changes the object's temperature.

D. It changes the object's momentum.

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

An ideal polarizer with its transmission axis rotated 30 degrees to the vertical is placed in a beam of unpolarized light of intensity 10w/m^2. after passing through the polarizer, what is the intensity of the beam? a. 8.7 w/m^2 b. 7.5 w/m^2 c. 5.0 w/m^2 d. 10 w/m^2 e. 2.5 w/m^2

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?