At a particular point on a track (call it Position A), a rollercoaster (m = 120 kg) is at a height of 32 m above the ground. The track drops steeply down to a height of 5.2 m above the ground, rises to 26 m above the ground, then
drops again to a height of 15 m above the ground at Position B. From Position A to B the rollercoaster covers a
distance of 430 m.
What is the change in gravitational potential energy (in Joules) of the rollercoaster from Position A to B?

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

What are the north and south poles of a solenoid change with?

Acommon technique in analysis of scientific data is normalization. the purpose of normalizing data is to eliminate irrelevant constants that can obscure the salient features of the data. the goal of this experiment is to test the hypothesis that the flux of light decreases as the square of the distance from the source. in this case, the absolute value of the voltage measured by the photometer is irrelevant; only the relative value conveys useful information. suppose that in part 2.2.2 of the experiment, students obtain a signal value of 162 mv at a distance of 4 cm and a value of 86 mv at a distance of 5.7 cm. normalize the students' data to the value obtained at 4 cm. (divide the signal value by 162.) then calculate the theoretically expected (normalized) value at 5.7 cm.