Question

Как найти относительную влажность воздуха если известна температура воздуха и точка росы?? температура воздуха 20 цельсия температура точка росы 15 цельчия

Answer 1

Φ = p0 / t 

p0 - точка росы ( 15 С ) 
t - температура ( 20 С ) 

φ = 15 / 20 = 0,75 = 75 % 

Answer 2

Finding Relative Humidity with Known Air Temperature and Dew Point

To find the relative humidity when the air temperature and dew point are known, you can use the following formula:

Relative Humidity = (Actual Vapor Pressure / Saturation Vapor Pressure) x 100

Where: - Actual Vapor Pressure is the vapor pressure of the air at the given temperature and dew point. - Saturation Vapor Pressure is the vapor pressure of the air at the given temperature.

To calculate the actual vapor pressure, you can use the formula:

Actual Vapor Pressure = Saturation Vapor Pressure x (Relative Humidity / 100)

To calculate the saturation vapor pressure, you can use the Magnus formula:

Saturation Vapor Pressure = 6.11 x 10^((7.5 x Dew Point) / (237.7 + Dew Point))

Let's calculate the relative humidity using the given values of air temperature and dew point:

Air Temperature: 20°C Dew Point: 15°C

First, we need to calculate the saturation vapor pressure at the given dew point using the Magnus formula:

Saturation Vapor Pressure = 6.11 x 10^((7.5 x 15) / (237.7 + 15))

Using a calculator, we find that the saturation vapor pressure at a dew point of 15°C is approximately 17.536 hPa.

Next, we can calculate the actual vapor pressure using the saturation vapor pressure and the relative humidity:

Actual Vapor Pressure = 17.536 x (Relative Humidity / 100)

Finally, we can rearrange the formula for relative humidity to solve for it:

Relative Humidity = (Actual Vapor Pressure / Saturation Vapor Pressure) x 100

Now, let's substitute the values into the formulas:

Saturation Vapor Pressure = 17.536 hPa Actual Vapor Pressure = 17.536 x (Relative Humidity / 100)

By rearranging the formula for relative humidity, we can solve for it:

Relative Humidity = (Actual Vapor Pressure / Saturation Vapor Pressure) x 100

Given that the air temperature is 20°C and the dew point is 15°C, we can calculate the relative humidity as follows:

Relative Humidity = (17.536 x (Relative Humidity / 100)) / 17.536 x 100

Simplifying the equation, we get:

Relative Humidity = Relative Humidity

This means that the relative humidity is equal to the relative humidity. Unfortunately, we cannot determine the exact relative humidity with only the given information of air temperature and dew point. We would need additional data, such as the actual vapor pressure or the specific humidity, to calculate the relative humidity accurately.

Please note that the calculations provided here are based on the formulas commonly used in meteorology. However, there may be other variations or corrections depending on specific conditions or standards used in different contexts.