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2 years ago

What does the air change rate represent?

Engineering

1 answer:

Juli2301 [7.4K]2 years ago

3 0

Answer and Explanation:

The removal or addition of air volume to the space is the air change rate
The rate of air change is positive when air volume is added to the space and the rate of air change is negative when air volume is removed from the space.
The standard built home has a 0.5 to 1 of air change rate.
The rate of air change is dependent on the building (how the building form)

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On a CNC lathe, which of the following axes specifies the distance of the cutting tool from the workpiece centerline?

kvasek [131]

Answer:

The axis of motion that is parallel to the spindle axis is always the Z-axis.

Explanation:

Z-Axis Which axis is which depends on the orientation of the spindle.

If the spindle is vertical (Figure 2.1), the Z-axis is vertical. Either the quill or the knee of a vertical spindle mill will move when a Z-axis command is executed.

This is the best answer I could give you, maybe you could show us a pic of the question so we see all the possible choices?

8 0

2 years ago

When the electrical connection to the alternator from the battery is not tight, it can cause?

Oksi-84 [34.3K]

Answer:

affects the flow of electricity

Explanation:

A loose battery terminal affects the flow of electricity. There is less power going to the electrical systems and the vehicle will not start or start sluggishly. Also, a loose battery terminal causes the car's electrical components like navigation, car lights, and audio among others to dim or fail completely.

3 0

2 years ago

A heating element in a stove is designed to receive 4,430 W when connected to 240 V. (a) Assuming the resistance is constant, ca

kiruha [24]

Answer:

a) The current in the heating element when it is connected to 120 V is 9.229 amperes, b) The power received by the heatng element connected to 120 V is 1107.522 watts.

Explanation:

a) The resistance as a function of voltage and power can be obtained from this expression, derived from the Ohm's Law:

$\dot W = \frac{V^{2}}{R}$

Where:

$V$ - Source voltage, measured in volts.

$R$ - Heating element resistance, measured in ohms.

Now, resistance is clear and determined afterwards:

$R = \frac{V^{2}}{\dot W}$

If $V = 240\,V$ and $\dot W = 4,430\,W$ , then:

$R = \frac{(240\,V)^{2}}{4.430\,W}$

$R = 13.002\,\Omega$

Now, let consider that heating element is conected to a 120-V source. The power generated by this element is:

$\dot W = \frac{V^{2}}{R}$

$\dot W = \frac{(120\,V)^{2}}{13.002\,\Omega}$

$\dot W = 1107.522\,W$

Besides, power as a function of current and resistance is given by this:

$\dot W = i^{2}\cdot R$

Where $i$ is the current required by the heating element, measured in amperes, and which is cleared herein:

$i = \sqrt{\frac{\dot W}{R} }$

If $\dot W = 1107.522\,W$ and $R = 13.002\,\Omega$ , then:

$i = \sqrt{\frac{1107.522\,W}{13.002\,\Omega} }$

$i \approx 9.229\,A$

The current in the heating element when it is connected to 120 V is 9.229 amperes.

b) The power received by the heatng element connected to 120 V is 1107.522 watts. (see point a) for further details)

6 0

2 years ago

PLEASE HELPPPP! a safe driving skill for a driver and a Motorcyclist

DedPeter [7]

An answer that fits a “driver” (assuming this means of a driver other than a
motorcyclist) and a motorcyclist is: safe following distance.
Mathematically you should allow one car length for every 10mph of movement to stop safely.
For example if a vehicle you are following is traveling at 50mph and you are following behind them, you should be a minimum of 5 car lengths away from their rear bumper. If going 70mph, it’s 7 car lengths, and so on.

8 0

2 years ago

What does the General Duty Clause require employers to do?

marin [14]

The General Duty clause states that an employer shall furnish "a place of employment which is free from recognized hazards that are causing or are likely to cause death or serious physical harm to it's employees.”

7 0

2 years ago