7 Answered Questions for the topic Efficiency

Efficiency Physics Power

02/10/18

#### Finding the speed of an object

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
Efficiency Energy

01/26/17

#### need help in this question

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
Efficiency Energy

01/26/17

#### need help in this question

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

05/25/16

#### Heat needed? Energy needed?

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?

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
Efficiency

09/15/15

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

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

08/26/14

#### If a production line ran for 20 minutes at 75% of capacity and 40 minutes at 53%, what is the efficiency of the line for 60 minutes?

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

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