An electron at point A in (Figure 1) has a speed v0 of 1.40×106m/s. A. Find the magnitude of the magnetic field that will cause the electron to follow the semicircular path from A to B.

B. Find the time required for the electron to move from A to B.
Express your answer in seconds.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.