# 1.4 and 2.1 Review c:

## 80 terms · Temperature in Thermal Systems and Work in Mechanical Systems

### What are Thermal Systems designed for ? o:

to move Heat Energy from warmer regions to cooler regions.

### The prime mover in thermal systems ? o:

Temperature difference

Heat

Temperature

### Temperature depends on what ? o:

Presence or absence of heat

### What is temperature measured on ? o:

Thermometers, usually in degrees Fahrenheit (°F) or degrees Celsius (°C).

Scalar

### Heat ? o:

form of energy found in the vibrating motion of atoms and molecules.

Thermometer

### Equation for Celsius ? o:

T°C = 5/9 ( T°F - 32° )

### Equation for Fahrenheit ? o:

T°F = 9/5 T°C + 32°

Thermocouple

### When two junctions produce separate voltages they ... ? o:

Oppose one another

Opposite

### Mechanical work is done when ? o:

a force or torque moves an object

Work done

Foot-Pounds

Newton-meters

Joule

force is applied

Efficiency

### Efficiency is ? o:

A comparison of output work to input work

### Ratio

Efficiency of the block and tackle

### Work is done

Only when force is applied

### Joule

Common SI unit of measure for work or energy

Newton-Meters

Mechanical work

### equation for Torque ?

Torque = Force x Lever Arm

### Equation for Work ?

Work = Torque applied x Angle moved through

### In the equation W= T × θ W stands for ?

W = Mechanical work done by a torque

### In the equation W= T × θ T stands for ?

T = Torque producing the work

### In the equation W = T × θ θ stands for ?

θ = Angle of rotation , measured in radians, through which the torque is applied.

the ratio of the length of the arc to the length of the radius.

1 Joule

Position

Raising it

### Equation used to calculate efficiency ?

% Efficiency = Output Work / Input Work × 100%

### Rotational Work occurs when ?

Torque causes a mass to rotate through an angle

is the angle formed when two sides of an angle intercept an arc length on the circumference of the circle.

### The circumference is ?

equal to 2 (pie) times the radius of the circle.

Real unit

### An electric motor is used to ?

Drive a water pump .

∆T

Force

### Temperature are not measured in ?

Newtons or Pounds

### Temperature depends on the ?

Presence or absence of heat

Hot or Cold

Direction

### Heat energy moves from?

Warmer regions to cooler regions

### Heat describes?

The molecular energy in matter

Heat energy

### Thermometers are used to measure?

Temperature in degrees Fahrenheit or Celsius

### Thermocouples are useful for?

Accurate instruments for measuring temperature

### Temperature difference in a system "acts" like?

A force when moving heat energy

### "Heat" describes ?

the molecular energy in matter

### Fluid flow in hydraulic and pneumatic systems depends on ?

Pressure difference

### Charge flow in electrical systems depends on ?

Voltage difference

Force

It expands

### The reference temperatures used most often are the ?

Freezing and boiling points of water

0⁰C

100⁰C

### The Fahrenheit temperature scale is an English scale used only in ?

The United States

32⁰F

212⁰F

180

1.8 F⁰

180 F⁰

Voltage

### A thermocouple thermometer is formed by using two ?

Thermocouple Junctions

### A thermocouple thermometer is used to measure?

the temperature difference between a known temperature and an unknown temperature.

### The thermocouple thermometer consists of two?

thermocouple junctions and a sensitive voltmeter

makes you warm

### What does the cold do to the body?

makes you cold :(

You get squished

Chemical

It will melt

chemical

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