Consider a particle moving along the x-axis whose velocity as a function of time is dx dt g 1+02t2 (1) where g is a constant. (a) calculate the components of the particle's 4-velocity. (b) express x and t as functions of the proper time t along the trajectory. (c) what are the components of the 4-force and the 3-force acting on the particle?

Which would not reduce the amount of green house gasses in the air

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.