What is the main idea of "Solar Conjunction: When the Sun Gets in the Way"? 1.Radio signals must pass through the solar corona.
2.A Mars year is about 1.9 Earth years.
3.The Solar Conjunction is a once-in-a-lifetime occurrence.
4.There is a period of time when the Deep Space Network won't be gathering data.

What do elements in a family tend to share. a.) similar periods b.) similar groups c.) similar atomic symbols d.) similar chemical properties and characteristics

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.