How does friction affect the motion of an object

What component of earth’s atmosphere exists entirely as a result of photosynthesis?

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.

According to the image below, which season is about to begin in the southern hemisphere? a. summer b. autumn c. winter d. spring