You lift a large bag of flour from the floor to a 1-meter-high counter, doing 100 joules of work in 2 seconds. How much power do you use to lift the bag of flour?

Iwould say the answer is d

They coasters are in tear-drop form because of physics. if the ride was in a complete circle, how would the coaster get into the loop, let alone get out of the loop? also, the reason why most coasters are in tear-drop form is because of acceleration. the steeper the turn, the faster the ride.

Ithink is earth radiation.