a the top of a hill a rollercoaster has 67,500j of kinetic energy and 290,000j of potential energy. gradually the roller coaster comes to a stop due to friction. if the roller coaster has 30,000j of potential energy when it stops, how much heat energy is generated by friction from the top of the hill until ot stops ?

1.85x10-3 cm x 5.22 x10-2 cm in scientific notation

gases in earth's atmosphere exert______________ on everything

327500

To calculate the heat energy generated by friction from the top of the hill until the roller coaster stops, we need to find the change in total mechanical energy. The initial total mechanical energy is the sum of the roller coaster's kinetic energy and potential energy at the top of the hill, and the final total mechanical energy is the sum of the roller coaster's potential energy when it stops.

The change in total mechanical energy can be calculated by subtracting the final total mechanical energy from the initial total mechanical energy:

Change in total mechanical energy = Initial total mechanical energy - Final total mechanical energy

Let's calculate the initial total mechanical energy:
Initial total mechanical energy = Kinetic energy + Potential energy
= 67,500 J + 290,000 J
= 357,500 J

Now, let's calculate the change in total mechanical energy:
Change in total mechanical energy = 357,500 J - 30,000 J
= 327,500 J

Therefore, the heat energy generated by friction from the top of the hill until the roller coaster stops is 327,500 J.