On Earth a 100 kg person riding a 300-meter-high roller coaster has 300 kj of potential energy at the top of the roller coaster. The Moon has roughly 1/6 the gravity of Earth. How high would a roller coaster need to be on the Moon so that a 100 kg person had 300 kj of potential energy at the top of the roller coaster? A. 300 meters

B. 50 meters

C. 1,800 meters

D. 600 meters

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.