Heat, Work, and Efficiency Flashcards
Device used to multiply work or distance.
Machine
Device that is used to redirect the added energy to a body and transfers that into an output of work.
Machine
Machines
Machine with 100% efficiency.
Ideal Machine
Machines
Machine where no energy is converted into nonmechanical energy, such as heat, sound, light.
Ideal Machine
Machines
Enumerate the simple machines
in the book <33
- lever
- inclined plane
- pulley
- screw
- wedge
- wheel and axle
Machines
When simple machines are combined, they form…
Compound Machines
Machines
The way to determine how much a machine can multiply an applied force is called…
Mechanical Advantage
Machines
What the machine is fully capable of if there are no external forces.
Ideal Mechanical Advantage
Machines
Ideal mechanical advantage is defined as the ratio of…
IMA = input distance/output distance
IMA = Di/Do 🤨
Machines
Measurement of how the machine really functions as it overcomes the effects of nonmechanical outside forces.
Actual Mechanical Advantage
Machines
Actual Mechanical Advantage is defined as the ratio of…
AMA = output force/input force
Machines
Mechanical efficiency (%) is defined as the ratio of…
ME = (output work/input work) × 100
or
ME = (AMA/IMA) × 100
Machines
Mechanical efficiency is only equal to _ when the machine is an Ideal Machine.
100%
input work = output work
How to increase the efficiency of a machine?
2 ways
- Minimize or maximize friction
- Minimize vibrations or sound
Form of energy that is moving between two bodies with a temperature difference.
Heat
Form of energy that is transferred by a temperature difference.
Heat
Heat
Enumerate the three ways to transfer heat.
- Conduction
- Convection
- Radiation
Identify the type of Heat Transfer in each scenario
A man touches a hot stove handle.
Conduction
Identify the type of Heat Transfer in each scenario
A fireplace warms up the room.
Radiation
Identify the type of Heat Transfer in each scenario
Hot air rises.
Convection
Heat Transfer
Transfer of heat by direct contact.
Conduction
Heat Transfer
Transfer of heat by currents of moving fluids because of their different temperatures.
Convection
Heat Transfer
Transfer of heat by electromagnetic waves from a heat source.
Radiation
Transfer of mechanical energy between two systems.
Work
Unit of heat.
joule (J)
This is the degree of how hot or cold a body is, compared to a given standard.
Temperature
Device that changes heat into mechanical energy or work.
Heat Engine
