The Lewis symbol

would be characteristic of which group?



a.

6A



b.

1A



c.

3A



d.

7A

---

d

Physics & Space Science

A lamp rated 23W-120V means that it will deliver 23 W

A) when the voltage across it is 120 V. B) whether or not it is connected to 120 V. C) as long as the current is ac. D) none of the above

This photo shows a carnival ride called a Rotor. If you had a second Rotor that spins at the same rate as the one pictured, but has a smaller diameter, the centripetal force on the people by the wall would be: (Hint: This is similar to the space station discussed at the bottom of page 168.)

a. larger than the centripetal force in the Rotor pictured. b. the same as the centripetal force in the Rotor pictured. c. smaller than the centripetal force in the Rotor pictured.

If the Earth were represented as a basketball (~10 in) and the Moon as a baseball (~3 in) then, to order of magnitude, what size would best represent the diameter of the Sun?

a. 10 ft b. 100 ft c. 1000 ft d. 10000 ft

On a calm day with no wind, you can run a 1500-m race at a velocity of 4.0 m/s. If you run the same race on a day when you have a constant headwind that slows your speed by 2.0 m/s, how much time would it take you to finish the race?

A) 250 s B) 750 s C) 1125 s D) 9000 s