Answer:
If a spacecraft is in space for a long time, radiation is a problem. Designers must figure out a way to protect astronauts from the radiation.
Answer:
During Earth's orbit in the summer months, the top of the Earth (the Northern Hemisphere) is tilted toward the sun, giving us longer days. In winter, the Northern Hemisphere points away from the sun, resulting in fewer hours of sunshine and shorter days
Explanation:
<span>Factors contributing to the west ward expansion of the United States include the discovery of gold, the Homestead Act, and the desire for adventure, land and riches. The answers are the third, fourth and fifth statements among the choices that you have included or posted.</span>
Alaska (USA) in west, 12 US states of the continental United States in south, Greenland (an autonomous country within the Kingdom of Denmark), and Saint Pierre and Miquelon (an island which belongs to France).
Answer:
Mineral A is harder than Mineral B
If Mineral A scratches mineral B, it is sharper and harder, because mineral A scratches Mineral B, not Mineral B scratching Mineral A.
The answer is the first option. Hope it helps!
