1.0 x 10^4 kg spacecraft is traveling through space with a speed of 1200 m/s relative to earth. a thruster fires for 2.0 mins, excerting a continious force of 25kn on the spacecraft in a direction opposite the spacecraft's motion. calculate the initial momentum and final momentum of the space craft?

4. who was the first one to measure the speed of light and conclude that it is finite? 5. who was the first philosopher who thought the speed of light is finite? 13. what is the speed of light numerically? 14. give an example of something moving faster than light 15. give an example for some particles or waves that

When does your body conduct current more readily?

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?