Noether's theorem implies that because of space translation symmetry, this quantity is conserved. In relativity, a massless particle's energy is equal to this multiplied by the speed of light. This quantity can also be found by dividing Planck's constant by the de Broglie wavelength. At non-relativistic speeds, this quantity squared divided by two 
Noether's theorem implies that because of space translation symmetry, this quantity is conserved. In relativity, a massless particle's energy is equal to this multiplied by the speed of light. This quantity can also be found by dividing Planck's constant by the de Broglie wavelength. At non-relativistic speeds, this quantity squared divided by two times the mass gives the kinetic energy. The change in this quantity is called the (*) impulse. Newton's second law states that force is proportional to the time derivative of this quantity. For 10 points, name this quantity that can be found as the product of mass and velocity and is often denoted p.
Noether's theorem implies that because of space translation symmetry, this quantity is conserved.
{linear momentum} [prompt on {p}; do not accept "{angular momentum}"]