Efficiency

A certain horse can maintain 1.0 hp of output for 2.4 hours with an efficiency of 72%. The horse is pulling a 220 kg object along a horizontal ground. The coefficient of kinetic friction between... more

Imagine that you are working as a roller coaster designer. You want to build a record-breaking coaster thatgoes 70 m/sec at the bottom of the first hill. You estimate that the efficiency of the... more

A 1000 kilogram roller coaster goes down a hill that is 90 meters tall. Its speed at the bottom is 40 m/sec. a. What is the efficiency of the roller coaster? Assume it starts from rest at the top... more

a. Calculate the amount of heat needed to warm 24.6 kg of water from a room temperature of 20.0°C to 60.0°C for use in a dishwasher.b. If the water heater has an efficiency of 61%, how much energy... more

Reasons which explain why the efficiency of a reaction increases as the average rate decreases? in other words, why does a slow chemical reaction is more effective than quick ones? I done an... more

"why 85% and 30% is taken as 1/0.85 and 1/0.30 while solving numerical"

This is based on a manufacturing facility and production line efficiency.