a. A lightning strike causes magnetized metal pieces near it to point around a circle with the direction (clockwise or counterclockwise) dependent on the particular lightning strike. If the magnets end up being pulled around the lightning with their north poles pointing clockwise when viewed from the sky looking down to the ground, which of the following best describes the direction of magnetic field lines around the lightning strike when viewed facing the ground?

Group of answer choices

The magnetic field points around the ligthning strike in a clockwise direction

The magnetic field points around the lightning strike in a counter-clockwise direction

The magnetic field points radially outward from the center of the lightning strike

The magnetic field line points in unpredictable directions

The magnetic field points radially toward the center of the lightning strike

b. Earth lies 149.6 Gm from the Sun while Uranus lies 2687 Gm from the Sun on average.

From Earth, Uranus's moon Ariel will have a delay in its transits in front of Uranus due to the finite speed of light.

The speed of light is 0.300 Gm/s. What will be the average time delay of Ariel's transits in seconds when Earth and Uranus are at their closest to three significant digits?

c. A grandfather clock pendulum has a length of 1.041 m from where it hangs to its 2.000-kg bob.

If the bob is swung all the way to the right at an angle of 20.00 when the clock strikes noon, at what minute after noon will the pendulum have swung 70 times?

[note: if 60 seconds have passed, the time would be 12:01 pm, and the minute would be 1; if 120 seconds have passed, the time would be 12:02 pm, and the minute would be 2; etc.]