Suppose a Particle's Four-Momentum Vector Has Components $\left[p_{t}, p_{x}, p_{y}, p_{z}\right]=[5 \mathrm{~kg}, 3 \mathrm{~kg}, 0,0]$

Multiple Choice

Suppose a particle's four-momentum vector has components $\left[p_{t}, p_{x}, p_{y}, p_{z}\right]=[5 \mathrm{~kg}, 3 \mathrm{~kg}, 0,0]$ . What is this particle's mass?

A) $5 \mathrm{~kg}$
B) $8 \mathrm{~kg}$
C) $4 \mathrm{~kg}$
D) $3 \mathrm{~kg}$
E) $\sqrt{34} \mathrm{~kg}$
F) Other (specify)