Solve for acceleration (m/s^2) (rounded to the nearest tenth) of a 5kg box initially moving upwards with a rope exerting 33N of tension upwards on the box.

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

When using the scientist method, which step comes last?