If you have a spaceship that can go 20% of the speed of light, how long would it take to travel 200 light-years?

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.

What describes the formation of horizon b? a. forms at the surface b. features parent material c. undergoes the most change d. forms due to decomposed material i think the answer is c. undergoes the most change

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.