What is one way that nuclear fission and nuclear fusion are similar? A. Nuclei are split into smaller nuclei. B. Atoms are altered in both processes. C. Small nuclei combine to form larger nuclei. D. They are both used to produce electrical power.​

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.

It is really hard for me right know

What is the orbital period of a spacecraft in a low orbit near the surface of mars? the radius of mars is 3.4×106m.