If you run a 3000-watt hair dryer for 30 minutes, how much electric energy do you consume?
A) 100 kW h
B) 6 kW h
C) 1.5 kW h
D) 90,000 kW h
E) None of the above.
Question 2
A 60-kg skier pushes off the top of a frictionless hill with an initial speed of 4.0 m/s. How fast will she be moving after dropping 10 m in elevation? Air resistance is negligible.
A) 10 m/s B) 15 m/s C) 0.15 km/s D) 0.20 km/s E) 49 m/s