Acarnot heat engine has an efficiency of 0.400. if it operates between a deep lake with a constant temperature of 298.0k and a hot reservoir, what is the temperature of the hot reservoir?

496.7 K

Explanation:

The efficiency of a Carnot engine is given by the equation:

where:

is the temperature of the hot reservoir

is the temperature of the cold reservoir

For the engine in the problem, we know that

is the efficiency

is the temperature of the cold reservoir

Solving for , we find:

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

prolly a beacuse the momentuem the car has increases while going down hill