The car is moving forward with 10 N of force but the friction of the road applies 8 N of force in the opposite direction. What
are the combined forces acting on the car?

How are calculation for velocity and speed different

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)